US2384585A - Coin-controlled liquid dispensing apparatus - Google Patents

Description

Sept. 11, W45. J. M. ALEXANDER COIN CONTROLLED LIQUID DISPENSING APPARATUS Filed Seph. 2, 1941 s Sheets-Sheet 1 w w 2 a 3, z w n mm M 2 H 2 2 m a p\ I a 3 l 9 \W F u Q 0] T 8 Z H 6: 8 m. 5 l- 8 2 Tw m u L 0 N o E I o Q 2% n K w w M A m Woo 0 a z \1. W1 .1. 65% Z a o w \l a? 2 a 3 Z u 5 5 53 Z n W A 5 5 A 5 2 w mgz INVENTOR.

John. M. Alexa-1161.31 BY 7M 2."

Aiiornef Sepi. H, 1945. J. M. ALEXANDER COIN CONTROLLED LIQUID DISPENSING APPARATUS Filed Sept. 2 1941 5 Sheets-Sheet 2 4w a as m M INVENTOR. John. M..A1xam 1av AHorney" Sept. 11, 1945. J. M ALEXANDER COIN CONTROLLED LIQUID DISPENSING APPARATUS Filed Sept. 2, 1941 5 Sheets-Sheet 3 IN VENT OR. John. M. Aluxamanv wow mom 0 SN m EN EN F x 44 Anon Leg" Sept. 11, 1945. J. M. ALEXANDER COIN CONTROLLED LIQUID DISPENSING APPARATUS Filed Sept. 2, 1941 5 Sheets-Sheet 4 Omr INV EN-T OR.

M. M m x m M M J wou Sept, H, 1945. J. M. ALEXANDER COIN CONTROLLED LIQUID DISPENSING APPARATUS 5 Sheets-Sheet 5 Filed Sept. 2 1941 II II H II II II I lll\|l II II lllll INVENTOR. John. M. Alrzxanler Aiiorney" Patented Sept. 11, 1945 COIN-CONTROLLED LIQUID DISPENSING TUS APPABA John M. Alexander, Lincoln, Nebr.

Application September 2, 1941, Serial No. 409,213

18 Claims.

The present invention relates to a coin controlled liquid dispensing mechanism and more particularly to one in which the flow or liquid is stopped by the operation of a preselector mechanism and in which the preselector mechanism is automatically set by the insertion of one or more coins.

It has been proposed to provide a gasoline vending machine wherein a preselector mechanism is gradually retracted by a subtracting mechanism and is operative to shut off the flow of gasoline and terminate the operation of the gasoline pump motor when the amount of gasoline which has been dispensed corresponds to the original setting of the preselector mechanism. In certain types of such machines, the preselector mechanism was set by hand. This led to the disadvantage that the operation of the pump still required the attention of an attendant to be sure that the preselector mechanism was correctly set. It was ac cordingly further proposed to provide arrangements for setting such mechanism manually in which the extent of the setting permitted was determined by the value of the inserted coin. With such arrangments, it has been impossible to provide adequate slug detecting mechanism.

Furthermore, the setting operation, due to being associated with the operation of inserting the coin, often necessitated the exertion of considerable efiort upon the operator.

An object of the present invention is to provide in a coin controlled liquid dispensing mechanism having a preselector mechanism for terminating the liquid dispensing operation when the amount of liquid dispensed equals the original setting of the preselector mechanism, motor means for automatically setting said preselector dial in accordance with the value of one or more coins inserted therein.

A further object of the present invention is to provide such a dispensing machine in which a motor is at all times disconnected from the preselector mechanism when the motor is not in the process of setting the same so as to permit free retraction of the preselecting mechanism by the subtracting means as the liquid is dispensed.

A further object of the present invention is to provide such an arrangement in which the subtracting means is effective to retract the preselecting mechanism at uniform predetermined increments and in which the motor is effective to advance said preselecting mechanism by increments of the same amount or multiples thereof.

A further object of the invention is to provide such a liquid apparatus in which a solenoid and pawl are employed for advancing the preselecting mechanism and in which the solenoid is energized a number of times equal to the value of the inserted coin divided by a monetary sum equivalent to the uniform increments by which the solenoid and pawl advance the mechanism each time the solenoid is energized.

A further object of the present invention is to provide in conjunction with the mechanism previously described, novel means for effecting the periodic energization of the solenoid a number of times corresponding to the value oi the inserted coin.

A still further object of the invention is to provide such a means for periodically energizing the solenoid which comprises a plurality of disks, one associated with each coin passage, and designed to cause actuation of switching means a number of times corresponding to the value of the coin.

'A still further object of the invention is to provide an arrangement .such as is set forth in the last paragraph in which the disks act to propel A still further object of the invention is to providefan arrangement such as set forth in the second preceding object in which the disks comprise a plurality of switch actuating pins, the number of such pins corresponding to the value of the coin.

.A further object of the invention is to provide an arrangement in which a motor associated with the preselector mechanism is continuously energized upon the insertion of a coin until the motor has driven the preselector mechanism to a position corresponding to the value of the coin.

A still further object of the present invention is to provide an arrangement suchvas is set forth in the last paragraph in which an electrically operated clutch is efiective to connect the motor with the preselecting mechanism only when the motor is energized.

Other objects of the invention will be apparent from a consideration of the accompanying speci-' fication, claims, and drawings, in which:

Figure 1 is a front elevational view of my improved dispensing means with a portion of the front cover removed to show the relation of various parts;

Figure 2 is a side elevational view of the dispensing machine, also with a portion of the cover removed; v

Figure 3 is a schematicview showing the relationshlp of the various novel elements of my ap- P 1 Figure 4 is an elevational view showing the mechanism of one form of the motor means for advancing the dial of the preselecting mechanism;

Figure 5 is a view, largely schematic, of the mechanism for periodically energizing the motor means of Figure 4;

Figure 6 is a transverse sectional view of a portion of the mechanism shown in Figure 5;

Figure '7 is a schematic view of a modified form of a mechanism for eriodically energizing the motor of Figure 4;

Figure 8 is a modified form of motor means for setting the preselector dial.

Referring to Figures 1 and 2 in which the general organization of the liquid dispensing apparatus is illustrated, the reference numeral I indicatesa base supporting a casing I2. Mounted within the casing is a pump I3, the suction side of which is connected to a pipe I4 leading to a suitable source of liquid supply such as an underground tank of gasoline (not shown). The outlet side of the pump is connected to piping I which is connected to an air separator IS. The outlet side of the air separator is connected at H to the inlet side of liquid meter I8. The outlet of meter I8 is connected by pipe III to visible gage 20. This, in turn, is conncted to a pipe 22 leading to a hose (not shown).

The pump is adapted to be operated by means of a motor 25, said motor being connected by means of a belt 26 and pulleys 21 and 28 to the pump I3. Associated with the motor 25 is a switch 30, which switch is actuated by rod 3|. The rod 3| is, in turn, connected to a bell crank lever 32 pivotally mounted in the casing at 32. The lever 32 has a downwardly extending arm 34 in the path of a push button 35 extending out!- 7 wardly through the casing. If the lever is not restrained from movement by any of the various means to be described later, the inward movement of push button 35 tilts the lever 32 in a counter-clockwise direction (as viewed in Figure 1) to cause actuation of rod 3| in switch closing direction.

Connected to and driven by the meter I8 is a meter shaft 38 which, in turn, is connected to a variator 39, such as shown in the patent to Slye No. 2,111,996, granted March 22, 1938. Such a variator is employed for driving the price wheels of the register commonly used on pumps of the type with which the present invention is primarily concerned. Such registering mechanism is indicated in connection with the present invention by the reference numeral 4I. This registering mechanism is of the well known numeral wheel or direct reading type. It includes a lower bank of numeral wheels for registering the gallons as they are dispensed. The registering mechanism M is housed in a casing with windows in the above Slye Patent No. 2,111,996 is provided with price indicating wheels which are visible through a pair of windows, only window 41 of which is shown. Also associated with the registering mechanism is a pair of amount indicating wheels. These wheels are driven by the variator 2,as4,sas

mechanism at a speed with respect to the gallon indicating wheels which is dependent upon the setting oi the variator. This setting, of course, is determined by the price. The amount indicating wheels are visible through oppositely disposed windows, only window 40 of which is shown.

The registering mechanism is provided in the conventional manner with aareset shaft 02 which is designed to be actuated by a crank 52 on the outside of the casing. The action of this reset shaft as far as the registering mechanism is concerned, is entirely conventional. when the reset shaft is rotated through an angle of 360, then 45 further, and then back to the 360 position all oi the registering wheels, with the exception of the 'price wheels, of course, return to the zero position. The reset shaft is connected at its end opposite the crank 53 to an interlocking mechanism 54 which has a depending arm 55 designed to interengage a portion of the bell crank lever 22 and prevent actuation of the bell crank lever to close the switch 30 if the wheels of the registering mechanism are not in the zero position. Such interlocking mechanisms are well known and a detailed description and showing is deemed unnecessary.

Further associated with the registering mechanism is a preselecting mechanism generally indicated by the reference numeral 80. This preselecting mechanism is employed to control the operation of a valve 8| interposed in the line I0 between the outlet of the meter I8 and the visible gage 20. The valve 8I is a two-stage valve comprising two valves which are serially closed and opened upon rotation of a valve actuating shaft 84. Thus upon rotation of valve actuating shaft 84 in valve closing direction, a main valve is first closed to reduce the flow to a minimum value permitted by a small-flow valve. Upon further rotation of the valve actuating shaft 04, this small or bleed valve is closed to completely terminate flow of fluid through valve 8 I. Inasmuch as such valves are old in the art, it is believed unnecessary to specifically show the details of the valve.

The valve shaft 84 is positioned by the preselecting mechanism and by other mechanisms to be described. In general, the valve is automatically opened upon the initiation of the dispensing operation and is closed when an amount of fiuid has been dispensed corresponding in value to the coin or coins inserted into the machine.

The preselecting mechanism 80, as previously explained, is employed in closing the valve II. This preselector mechanism is initially set by coin controlled means which forms a portion of my present invention. When the amount of gasoline that has been dispensed corresponds to the original setting of the preselecting mechanism, this mechanism operates to close the valve and interrupt the further flow of liquid to the nozzle of the pump. In general, the preselecting mechanism comprises a dial I00 with suitable indicia indicating various monetary sums. In one contemplated form, the dial is provided with numerals up to two dollars and twenty-five cents ($2.25) in multiples of five cents. This dial I00 is automatically set by any of several coin controlled mechanisms forming part of the present invention and particularly designed for setting of the dial I00. In general, these mechanisms operate in response to the insertion of coins of various denominations to set the dial to a position corresponding to the value of the total number of coins inserted. These coin operated mechanisms. iurthermore, are adapted for the incorporation oi highly effective types of slug detecting mechanisms.

Thedial I is periodically retracted by subtracting mechanism to be described later. As the dial reaches a predetermined position within a predetermined amount of the zero position, the valve actuating shaft 84 is automatically rotated from valve open position to minimum flow position. During this rotation, th main valve is closed, only the small flow valve being allowed to remain open. Upon the dial I00 reaching the zero position, the valve is allowed to move to full closed position. The use of a. two-stage valve causes the 'final operation to be sufllciently slow that there is no overshooting. In other words,

when the main valve is closed, the flow of gasoline is very materially reduced, and the entire subtracting mechanism is operated very slowly.

While the invention is particularly concerned with the coin operating means for setting a preselecting mechanism of the type briefly discussed above, the actual details of the preselecting mechanism itself do not form part of the present invention. ,In other words, while the invention is concerned with a method of setting such a preselecting mechanism, the novelty is in the general combination and not in the details of the preselecting mechanism. For example, the preselecting mechanism and the subtracting mechanism may be of the type shown in the co-pending application of Sherwood Hinds, Serial No. 309,- 502, filed December 15, 1939. In order to illustrate generally the operation of this preselecting mechanism, it is shown schematically in Figure 3, to which reference was previously made.

In this figure, the various shafts are-indicated in dotted lines and the various elements carried by these shafts have been for the most part ro-' tated through an angle of 90 to be within the plane of the paper. The dial I00 is rigidly secured to shaft IOI. Also rigidly secured to the shaft IOI is a subtracting ratchet I02, a pair of cams I and I01, and a'pin disk I08. The pin disk forms part of the mechanism for setting the dial I00 and will not be described at the present time. The shaft ml is journalled in a frame IIO. Rotatably secured to shaft IOI is a pawl carrier plate II2. Pivotally secured to this plate and biased into cooperative relation with the subtracting ratchet I02 is a pawl I. A spring II5 acts to bias the pawl carrier plate II2 in clockwise direction. A lever carrying plate I" is pivotally secured to a fixedsupport at II8. Pivotally secured to the lower end of this plate H1 is a lever I22, the lower end of which is designed to cooperate with a cam i23 secured to a shaft I24. The shaft I24 is operatively connected to the amount indicating wheels of the registering mechanism M. In other words, the shaft I24 is rotated in accordance with the movement of the amount indicating wheels, th numerals of which are visible through window 48. Lever I22 is pivoted at an intermediate point thereof to the lever carrier II! as indicated at I28. Th upper end of the lever E22 has secured thereto a rod I28. The left hand end of rod I28 is in turn connected to a pawl carrier plate II2. Secured to the upper end of the plate I". is a link I30 connected eccentrically to a disk I32. This disk is secured to shaft I34 which, in turn, is connected to the change-over lever I33. When wise position to approximately a horizontal position. the plate I" is tiltedin a clockwise direc tion sufficiently to move the lever I22 out of cooperative relation with the cam I23.

Whenthe parts are in the position shown. each rotation of cam I23 due to the gasoline flowing vof cam I22 moves off of the cam follower portion of lever I23, the spring H5 is effective to tilt the plate II2 back in a clockwise direction to move the pawl into the next adjacent notch.

It will be seen from the above that as gasoline flows through the meter; the subtracting ratchet I02 is moved in a counter-clockwise direction. This movement, moreover, causes the movement of the shaft IOI and the dial I00 in a counterclockwise direction. At the same time, cams I05 and I01 are rotated in a counter-clockwise direction. These two cams are designed to control movement of the valves to minimum flow position and closed position respectively at the desired times.

' Secured to one end ofthe valve actuating shaft 84 is a lever I40 having a forked upper end. The

two legs of the forked end are designed to straddle a pin I4I secured to a triangular plate I43.

This plate-is non-rotatably secured to a shaft I44 journalled in the preselector mechanism housing 80. A spring I45 is fastened at its lower end to the plate I43 and at its upper end to a fixed portion I48 of the pump casing. Spring I45 serves to bias lever I43 in a clockwise direction (as viewed in Figure 3) and hence cause counter-clockwise movement of the shaft 84, which tends to close valve 8|. Thus the spring I45 serves to bias shaft 84 in valve closing direction. Secured to shaft I44 within the case of preselecting mechanism 80 are arms I48, I49, and I50, arms I48 and I49 being integral. These arms are secured to the shaft at different angular positions as clearly evident from Figure 3.

The arms I48 and I50 are designed to cooperate with levers I5I and I52 which in turn cooperate the lever I33 is in the position shown, the plate with the cams I05 and IN. Levers I5I and I52 are biased into engagement with the cams I05 and I 01 by gravity or any suitable biasing means.

With the parts in the position shown, the end of'the arm I48 bears against the end of lever I52 and thus restrains clockwise movement of shaft I44 by spring I45 and hence counter-clockwise movement of shaft 84. The cam I05 has an elongated toe portion I55, the forwardmost portion of which is so located with respect to dial I00 that it engages the cam follower portion of lever I5I just as the dial I00. reaches, the five cent position. In other words, the ca ngtoe I55 coacts with lever I5I when an amount :within five cents of the desired amount of gasoline has been dispensed. When the cam toe engages the lever I5I, it tilts the latter in a clockwise, direction to move the right end thereof out of the path of movement of 'arm I48. This permits spring 45 to rotate shaft I 44 ina clockwise direction and hence to cause rotation of shaft I44 in counter-clockwise or valve closing direction. This rotation of shaft in is limited by 'thefengagement of arm I50 with the right hand' nd-of lever I62. The arms I49 and I60 are so placed in angular position that the movement of shaft I44 permitted when arm I48 is released, results in shaft 64 being rotated sufllciently to cause closure of the main valve member while leaving the minimum flow valve member open. In other words, the valv is moved to its minimum flow position. This results in the flow of liquid through meter I8 being decreased materially so that the amount indicating wheels, and consequently the cam I23 moves at a much lower speed. Eventually, however, the ratchet I02 is moved to a position at which the numeral zero appears behind the window I03. When this appears, the desired amount of gasoline has been dispensed. At this time, the cam toe I51 of cam I61 engages the cam follower portion of lever I52, tilting this lever in a clockwise direction and thus releasing the arm I50. The spring I45 is now able to rotate shaft I44 and consequently shalt 64 in valve closing direction to cause closure of the minimum flow valve as well as the main valve. Valve 8| is now completely closed and all further flow of gasoline is stopped.

The arm I49, which as previously explained, is formed integral with arm I48, is designed to cooperate with an abutment member I 53 resiliently carried by a lever I56 which is connected by a link I58to a lever I59. The lever I59 is secured to shaft I34 to which is secured the change-over lever I33. When this lever is moved clockwiseto the substantially horizontal position in which lever I22 is out of engagement with cam II4, lever I56 is rotated counter-clockwise to bring the abutment member 153 into the path of movement of arm I49. The substantially horizontal position of the lever I33 is the manual position in which the pumpis operated without in which the pivot pin I61 is on a straight line between the stub shaft I62 and the pivotal connection of rod I66 with lever I43. In this position of the segment gear I6I, the teeth of the gear are in mesh with the gear I63 connected to the pulley 26. Since in the normal running operation, it is undesirable to have the teeth so in mesh, means are provided to restrain movement of the segment gear by the biasing means previously referred to. This means consists of a lever I10 which is pivotally secured at "I to a fixed portion of the casing. The right hand end of the lever is in the form of a hook I12 which is designed to engage the pivot pin I61 and prevent clockwise movement of the segment gear. Lever I10 is shown in this restraining position in Figure 3. The lower end of the rod I13 is pivotally connected to an intermediate point of lever I16 as indicated at I15. The upper end of rod I13 is connected to a lever I14. The end of the lever I14 opposite the point connected to the rod I13 is adapted to be engaged by an arm I11 carried by the reset shaft 52. The reset shaft 52 is moved in a counter-clockwise direction as indicated by the arrow opposite handle 53. Upon the reset shaft being rotated to reset the numeral indicating wheels of the register 4|, the lever I14 is tilted so as to move the rod I13 upwardly. This in turn allows lever I10 to be moved upwardly to disengage the hook I12 from the pivot pin I61. It will be obvious that immediately upon the hook being disengaged from pin I61, spring I45 and the strain the aid of the preselector mechanism. Since the preselector dial I00 would, under thes conditions, be at the zero position in which levers I5I and I52 are both held by their associated cams out of engagement with arms I48 and I50, it is necessary to provide this further latch to hold the valve. open under these circumstances. As soon as the lever I33 is moved to its normal position, as shown, the abutment member I53 is moved out of the path of lever I43 to cause closure of the valve.

Means are provided for automatically reopening the valve after it has been closed. This means is operative upon the initiation of the dispensing operation. This apparatus will now be described.

A segment gear I6| is journalled on stub stafl I62 secured to the housing of the pump I3. The

teeth of this-segment gear I 6| are adapted to mesh with a pinion gear I63 secured to the pulley '28 and rotatable therewith. Connectin means includinga lower'rod I65 and upper rod I66 extends between a pin I61 secured to the segment gear I6I and the plate I 43.' The upper section of the rod I66 is bent around the variator and registering mechanism as best shown in Figure 1. The two sections of the rod are connected by a strain release connection I66.

In general this strain releas connection is of conventional construction comprising a sleeve and resilient means against which the rods I65 "and I66 may be extended. The strain release connection I66 functions in the usual manner release connection I68 are effective to rotate the segment gear I6I in a clockwise I direction to cause engagement of the teeth thereof with the pinion gear I63. The apparatus is now in condition for starting.

Upon th motor being initially energized, the pinion gear I63 is eilective to rotate the segment gear in a clockwise direction thereby moving rods I65 and I66 downwardly. This downward movement of the rods rotates the lever I43 in a counter-clockwise direction to move the valve to open position. The valve is thereafter retained in open position by latching arm I48 or arm I43, as previously discussed.

My invention further contemplates retaining the motor switch in closed position as long as the valve is open and automatically closing the same as soon as the valve is closed. This, moreover, is accomplished without the use of a switch additional to the 'main motor switch. As previously pointed out, a rod (H is operatively connected to the motor swtich 30 at one end and at the other end is connected to the bell crank lever 32. As previously pointed out, an arm 55 extending from the interlocking mechanism 54 prevents the movement of the bell crank lever if the numeral carrying wheels of the register 4| have not been reset. ,Thisfeature is conventional in the prior art. I further provide an extension of bell crank lever 32 in the form of an arm I86 which extends horizontally, then vertically, and finally horizontally again to cooperate with the catch I3I. This catch is slidably secured on a supporting plate I32 clamped between the valve 6| and the lower section of pipe I3. The catch I3I is suitably biased by means not illustrated into a position in which the catch extends under the forwardly extending portion of arm I86. The catch is designed to be actuated by arm I36 carried by valve actuating shaft 84. As long as valve shaft 34 is in either the full flow or minimum flow position, the catch 6| is held by the biasing means under the end of arm I80. Upon the valve actuating shaft 84 moving to valve closed position, however, the arm I98 is effective to retract the catch I 3| to permit the lever 32 to move to switch open position. Thus as long as the valve is open, the switch is held in closed position. As soon as the valve is closed, however, switch 30 is opened to stop operation of the pump motor.

The apparatus which has been described so far corresponds to that shown in my copending application Serial Number 393,971, filed on May 17,

1941, for Liquid dispensing mechanism. For further understanding of the details of the mechanism described so far, reference .is made to the said application. The novel mechanism of the present application will now be described.

Referring specifically to Figure 4, a motor for setting the dial I is shown in detail. Rigidly secured to the shaft I M is a disk I08, previously referred to. This disk and the other actuating means therefor is located within a housing 200. The location of this housing with respect to the pump mechanism is shown in Figure2. The disk I08 comprises a series of pins 202. The number of these pins corresponds to the number of notches on the subtracting ratchet I02 and the number of numerals on disk I00. In one form of the mechanism, I have employed forty-five pins on the disk I 00. In this form, accordingly, provision is made for dispensing two dollars and twenty-five cents worth of gasoline. Pivotally secured to shaft IIII is a lever 205. This lever is pivotally connected at its upper end to the stem 208 of a solenoid core 201. This solenoid core 201 forms part of a solenoid 208 of conventional form. The fixed core of the solenoid is indicated by the reference numeral 209 and the winding by the reference numeral 2I0.- Secured to the case 200 is a conduit 2II to accommodate wires leading to the winding 2! 0 of the solenoid 208.

Pivotally secured to the lever 205 is a pawl 2I3. The forwardmost end of this pawl is notched 'as at 2I4 to engage the teeth 202. A spring 2I5 extends between the pawl 2 I3 and the lever 205 and tends to bias the pawl 2 I3 in a clockwise direction into the path of the pins 202. A spring H6 is connected between a stationary support 2i! and the lever 205. This spring 2| 6 serves to bias lever 205 in a counter-clockwise direction. In other words, the spring 2I6 tends to bias the core in a direction opposite to that in which it is moved by the solenoid. A fixed pin 2"! is secured to the base 2H! and lies in the path of a heel portion 2I9 of the pawl 2I3. As will be obvious from the drawings when the heel 2I9 of pawl 2i 3 engages the stop 2 I8, the pawl is rotated in a clockwise direction against the biasing action oi spring 2I5 to move the notched ortion 2I4 of the pawl out of the path of pin 202. This feature is very important inasmuch as it permits movement of the disk I08 and consequently shaft IOI without interference by the pawl 2 I3.

It will be obvious from the previous description of the structure. that each time that the solenoid winding 2"! is energized, the movable core 201 is moved to the right to rotate the lever 205 in a clockwise direction. As soon as lever 205 has moved sumcientlv to permit heel 2I9 to move away from stop pin 2 I8. the spring 2| is effective to rotate the pawl 2 I3 in a clockwise direction to move the notched portion 2 I 4 into the path of the next pin 202. As the solenoid core moves into the fixed core portion 209, the disk I08 is rotated the distance between two of the teeth 202 in a clockwise direction. Upon deenergization of the solenoid winding 2I0, the spring 2I3 is effective to retract the lever 205 in a counterclockwise direction and at the end of this movement, the heel 2I9 of the pawl 2I3 engages the stop pin m to rotate the pawl H3 in a counter-clockwise direction out of the path of pins 202. The means for periodically energizing the solenoid winding 2I0 in accordance with, the amount of money deposited in the machine will now be described.

Referring to Figure 5, the reference numeral 225 indicates slide mechanism for the insertion of coins, the reference characters 226, 221, and 228 designate slug detectors for thevarious denominations of coins which the machine is adapted to receive, and reference characters 229 indicates a motor driven coin operated switch. In general, the coin receiving slide mechanism 225 has a number of slides corresponding to the number of denominations of coins which it is designed to have the machine receive. Each slide is adapted to introduce the respective coin into .a tube which leads to the particular slug detector designed to receive that particular denomination of coin. If the coin is successfully passed by the slug detector, it passes to the appropriate chute of the coin operated switch 229. The process of actuating the coin has started the motor of this switch and as the coin passes through the motor driven switch, one or more switches are actuated in accordance with the denomination of the coin. For example, if the coin is a five cent piece, the switches of the unit 229 will be actuated once. If it is a dime, they will be actuated twice, and ii a quarter, they will be actuated five times. In other words, the switching mechanism is pulsed once for every five cents of the total denomination of coins inserted. As will be explained later, moreover, no matter how many coins of the same denomination are inserted, the motor driven switch will eventually pulsate the asso-- ciated switches in accordance with the total value of the inserted coins. The switches associated with the switching mechanism 229, are electrically connected in parallel to the winding 2 I0 of the solenoid 208 so that each time these switches are closed. the solenoid is energized to advance the disk I08 the distance between two pins.

The slide mechanism 225, as previously indicated, comprises three slides or more as desired, depending upon the number of coins which it is desired to have the machine receive. The construction of these slides is largely conventional. They are secured in a bracket structure 232 which is secured to the wall 233 of the pump casing I2. Each slide 234 has an opening 235 adapted to receive a coin of the desired denomination. When this slide 234 is pushed forwardly, the coin is moved inwardly toward an opening communicating with a tube. The tubes associated with the three slides are identified by the reference numerals 231, 238, and 239, respectively. Pivotally secured to the bracket 232 is a lever 2. The right hand end of this lever has an upstanding arm 242 which extends into the path of the coin placed in the coin opening .235. The slide 234 is provided with a slot communicating with the opening 235. The arm 242 normally projects into this slot. When the slide is moved in, in the absence of a coin, the arm 242 merely travels along the slot and into the coin opening 235 so that the position of lever 2 is not disturbed in any way. If a coin is in the opening 235 when the slideis pushed inwardly, however, the ennected to a lever 253.

clockwise direction. The left-hand end of lever 2 is pivotally connected to a rod 245 which leads into the motor operated coin switch mechanism 229. As will be explained later, the tilting of lever 2 in a clockwise direction, with the resultant movement of the rod 245 upwardly causes the motor of the mechanism 229 to be placed into operation. In other words, the insertion of a coin causes this motor to be placed in operation. It is to be understood that while only one arm 242 is referred to, lever 24f is provided with a plurality of such arms each extending into a slot of the associated coin slide.

The tubes 231, 238, and 239 lead to slug detectors 226, 221, and 228. Each of these slug detectors is designed to test a coin of a predetermined denomination and which would normally be introduced into the slide connected to it. Slug detectors 226, 221, and 228 may be of any conventional form. Preferably, however, they are of the type employing a combination of tests including those of testing the hardness, the weight, the size, andthe conductivity of the metal in the coin. Typical of the slug detectors which may be employed are those shown in the patent to Gotfriedt No. 2,073,261, issued March 19, 1937, and the patent to Frye No. 2,094,788, issued October 5, 1937. By usin a slug detector of this type, a coin is subjected to much more rigid test than is possible when a slide type of slug detector is employed.

Slug detectors of the type which I propose to use customarily employ magnets for testing the conductivity of the coins. Where the inserted slug is excessively magnetic, it often happens that this slug is retained in the slug detector. Consequently slug detectors of this type employ some means for mechanically forcing the slug out of the slug detector. In the present case, the slug rejectors for the various slug detectors 226, 221, and 228 are actuated by plungers 25l. These three plungers are all connected together to a single rod 252, the upper end of which is conlever and has an upwardly extending arm which is engaged by a button 254 extending through the pump casing. When button 254 is pushed inwardly, the bell crank 253 is rocked in a counterclockwise direction to move the rod 252 and the plunger 25! downwardly. Upon such downward movement, any'slugs that may be retained in the slug detectors 226, 221, and 228 are automatically rejected.

After the coin has left the slug detector, it passes through a passage in a connection neck 268. In this case, reference is made to Figures 1 and 6. This connection neck has three passages, corresponding to the three slug detectors and the tubes 231 to 239. The coin passes through the passage in neck 268 connected to the slug detector through which it has passed.

The motor driven coin switch 229 is shown schematically in the lower portion of Figure 5. Figure 6 is a transverse sectional view of this switch. A portion of the switch is also shown schematically in the general schematic view of Figure 3. Referring first to the schematic showing at the lower portion of Figure 5, the switching unit 229 comprises a motor 262. This motor is of conventional construction comprising a rotor 263, a core structure 264, and a field winding 265. The rotor 263 is connected by means of a reduction gear train 266 to a shaft 269. Secured to the shaft 269 is a switch actuating disc 216 having a spiral track 211. Also secured to the shaft 269 are three coin actuating disks 214, 215, and 216. These three discs are associated with coin passages connecting with the slug detectors 228, 221, and 228 respectively. The discs are preferably of a rubber-like material such as Neoprene," a substance which can be obtained commercially on the market by that name. The structure associated with these discs will be discussed in more detail later.

Referring again to the motor 264, the energizing circuit for this motor is controlled by a mercury switch 288. The mercury switch is secured to a lever 28l pivoted at an intermediate point thereof. Pivotally secured to a fixed portion of the switch housing is a lever 283. This lever as best indicated in Figure 6 has a turned-in lip 284 which projects into the spiral groove 21! of disk 218. The spiral is so arranged that as disk 218 is turned in a counter-clockwise direction, the tongue 284 engaged in the spiral is forced outwardly carrying the upper end of lever 283 to the left. This movement of the lever 283 is resisted by a spring 288 extending between the upper end of the lever and a fixed support 285. Secured to the lever is an abutment portion 281, the left hand end of which bears against the lower end of lever 28L Thus, upon lever 283 being moved to the left, the abutment post 281 tends to rotate the lever 28l and the switch 288 in a clockwise direction. When so moved, the switch 288 is moved to switch open position. Thus upon the disk 218 being rotated in a counter-clockwise direction (the direction produced by energization of The lever is a bell crank motor 262) mercury switch 288 is moved to switch open position in which position it is shown in the drawings. As best indicated in Figure 6, lever 283 is pivotally secured with a loose fit over a pivot screw threaded into a. post 288 projectingfrom a plate 289 forming part of the housing of the motor switch mechanism. Interposed between the pivot screw-298 and thelever 283 is a coil spring 29!. By reason of this coil spring, the lever 283 can be swung outwardly so that the tongue 284 is moved .out of the spiral groove of disk 218. A bar-292 is secured to a rod 293, the bar 292 and rod 293 being journalled at their opposite ends. An arm 294 is secured to the left hand end of rod 293 and is pivotally connected to the rod 245 so that upon upward movement of rod 245, the arm 294 is moved upwardly to rock the shaft 293 and plate 292. Such rocking movement of bar 292 which bears against the lever 283, causes the lever to be tflted outwardly thereby moving the tongue 284 out of the spiral groove on disk 218. When this happens, a biasing spring 264 is effective to move lever 283 in a clockwise direction (as viewed in Figure 5) until it engages the hub of disk 218 or some other suitable stop. Upon release of the arm 294, spring 29l forces lever 283 inwardly to cause the tongue 284 to enter the spiral groove. The tongue is now in the spiral groove close to the center of the disks, however. Extending between the levers 281 and 283 is a spring 291. This spring serves to causethe lower end of lever 2" to follow the path of movement of lever 283. Thus when lever 283 is moved in a clockwise direction by reason of the tongue 284 being released from this spiral groove adjacent the outer periphery thereof, the spring 291 is effective to rotate the lever 28l in a counter-clockwise direction to move switch 288 to its closed position. As previously explained, the rod 245 is moved upwardly each time that a coin is inserted in one of the-slides 234. Thus each time that such a coin is inserted, the rod 245 is moved upwardly to rock the lever 283 and release the tongue 284 from the outermost portion of the spiral so that the lever 283 assumes a position adjacent the innermost portion of the spiral. This means that the switch 280 is reclosed and remains in this position for a predetermined period of time which is the time required for the tongue 283 to ride to the outermost portion of the spiral groove. This period of time is sufficient for a coin of any denomination to travel through its coin track.

Referring now to Figure 6, it will be noted that the mechanism 229 comprises a plurality of plates 289 (previously referred'to). 298, 299. 300, and BM. Plates 299, 300, and 30l are all provided with integral ridges to spape the plates from each other and to provide inclosures therebetween. Between plates 298 and 289, the gear train 268, previously referred to, is located. It is to be understood from the previous description that this gear train is connected with the motor 262 and shaft 269. Disks 214, 215, and 216 are located between the plates 298. 299, 300. and 30!. The plate 299 is provided with a rib 304. The path of this rib is best shown in Figure 5. Similarly. plates 300 and 30! are provided with integral ribs 305 and 306. It will be noted from Figure that these ribs along with cooperating ribs and the disks 214, 215 and 216 form passages for the coins. In each case this passage is of a width corresponding to the diameter of the coin. Thus the rib 304. referring to Figure 5, forms a passage of a width corresponding to the diameter of a five cent piece. Similarlv, the rib 305 forms a passage corresponding in width with the diameter of a dime. Similarly, the passage formed by rib 308 and disk 210 is adapted for the reception of a twenty-five cent piece. In each case, the width is such that the coin in question fits snugly within the passa e and firmly engages the disks. Inasmuch as the disk is formed of a yieldable material, it is able to firmly engage the coin and yet allow for any minor variations in the diameter thereof due to wear. It will be obvious that as the disks 214. 215, and 216 are rotated in a counterclockwise direction by the action of motor 262, each disk will roll any coin in its associated passage through said passage at a uniform rate depending upon the speed of the rotation ,of the disk. In the case of the twenty-five cent passage. 9. coin is shown in Fi ure 3 in the process of being rolled through the passage.

As the coins are rolled through the passage, they are designed to actuate switch positioning arms. Referring to Figure 5, these arms are indicated by the reference numerals 309 and 3I0. It will be noted that arm 3l0 has three fingers 3i i, 3| 2, and 3l3. Similarly arm 309 has two fingers 3H and 3i5. The arm 309 has secured thereto a sector gear 3. This gear meshes with the gear 3l8 rigidly secured to an arm 320 carrying a mercury switch 32I. The mercury switch is shown in Figure 5 in its circuit open position. Upon the arm 309 being rotated in a clockwise direction, however, the arm 320 is rotated in a counterclockwise direction to move switch 32! to circuit closed position. It will be obvious that arm 309 is so located that each time that one of the fingers 3" or 3| 5 is pushed outwardly by the engagement of the coin therewith, the arm 309 is rocked clockwise to close the switch. Arm 3l0 similarly has secured thereto a sector gear 32I which meshes with a gear 322 rigidly secured to an arm 324 which arm carries a mercury switch 325.

Thus, each time that a coin engages one of the fingers 3H, 3l2, or M3, the arm M0 is rocked in a clockwise direction to rock arm 324 in a counterclockwise direction and close switch 32 5.

As will be apparent from Figure 6, fingers 3 to 3l5 project varying distances into the switching mechanism 229 and hence varying numbers of these contact with the different coins. As finger 3 extends through all three compartments thereof, it is engaged by a coin passing through any of the coin tracks. Finger 385 extends through only the outer or twenty-five cent track. Finger 3 extends through the ten cent track and the twenty-five cent track so that it is engaged by either a dime or a quarter. The fingers 3I2 and 3l3 extend only through the outer or twenty-five cent track. Thus, a five cent piece oing through its track contacts only finger 344 so that the lever 309 is moved once by the passage of the five cent piece therethrough. A ten cent piece contact both fingers 3M and 3 so that levers 309 and 3l0 are each actuated once to cause switches 32l and 325 tobe each closed once. A quarter passing through its track causes all of the fingers to be moved outwardly so as to cause switches 32! and 325 to be closed five successive times. Since switches 32I and 325 are connected in parallel to solenoid 208, the solenoid is energized a number of times corresponding to the number of times the fingers are engaged by the coin passing through.

It is obviously undesirable for pump motor 25 to be operated at the same time as the switching mechanism 229 is being operated. If both the pump motor and the switching mechanism 229 are operated at the same time, there is a tendency for the liquid flowing through the meter l8 to cause the preselecting dial I08 to be retracted in position while at the same time the coin passing through the switching mechanism 229 causes the periodic energization of solenoid 208 to periodically advance the dial I08. Thus, there is one means acting to retract the dial and another means acting to advanceit. Due to the fact that the solenoid is capable of exerting only a limited amount of power, this is not likely to cause serious injury. Nevertheless, it is desirable to provide some means for preventing this simultaneous actuation of the dial advancing means and the dial retracting means. A relay 335 is provided for this purpose. This relay comprises a relay coil 336, a relay core 331, an armature 338, and a mercury switch 339 positioned by said armature. When the relay coil 331 is deenergized, the armature assumes the position shown in the drawing to which it is biased by any suitable means, not shown. In this position, the switch 339 is in circuit closed position. Upon energize.- tion of the relay coin 336, the armature 338 is moved clockwise to move switch 339 to circuit open position. As will be explained later, the relay coin. 336 is connected in parallel with the field winding 265 of motor 262 and switch 339 in series with the pump motor 25. Thus, whenever the motor 252 of the switching mechanism 229 is energized, the relay winding 336 is energized to cause switch 339 to be moved to circuit open position to prevent operation of the pump motor 25.

Operation of species 1 to 6 The various elements are shown in the position assumed when the pump is in operation dispensing gasoline. It willv be noted from Figures 1 and 3 that fifty cents worth of gasoline has been dispensed. this being the amount shownin theamountwlndow. Itisalsotobenotedthat the preselector dial is at the twenty-five cent gasoline and fifty cents worth of gasoline has already been dispensed. The book I12 of lever I10 is engaged over the pivot pin I01 so as to hold the segment gear in the position shown in the drawing in which the teeth of the segment gear are out oi" engagement with the pinion gear I00. The switch associated with the motor 20 is held closed by reason of the horizontal arm of lever 02 being retained in its uppermost position by the catch I 0|. With the switch in this closed position and with the relay 000 deenergized. a circuit is established to motor 20 as follows: from conductor I extending from any suitable source of power (not shown) through conductor 002, switch 000, conductor 0, switch 00 and conductor 3 back to conductor "0, the other of the two conductors leading from the source of power. With the parts in this position, both the main valve and minimum flow valve of valve 0i are in open position. Due to the liquid flowing through the meter, the amount dials are being continuously turned and the shaft I20 coupled therewith is likewise continuously tuming, causing the continuous turning of the cam I20. Each time that the toe of the cam I20 engages-the lower end of the lever I22, this lever is rocked in a clockwise direction. The clockwise movement of lever I22 is transmitted through rod I20 to pawl carrying plate 2 so as to-cause this plate to move in a counter-clockwise direc-.

tion.. The engagement of pawl H0 with the retracting ratchet causes the retracting ratchet to be moved in a counter-clockwise direction the distance of one tooth each time that this action takes place. The number of teeth of retracting ratchet I02 corresponds to the number of numer-' als on dial IIO, as previously explained. Thus,

there is one tooth on the subtracting ratchet for each five cent interval just as there is one pin on disk I00 for each flve cents of the inserted money. Each time that lever I22 is rocked, to move in turn the subtracting ratchet in a countor-clockwise direction, the shaft IOI, the dial I00, the disk I00 and the cams I00 and I01 are i all moved in a clockwise direction, the distance of five cents on the dial I00. The movement of the disk I00 is possible by reason of the feature by which pawl 2I0 is withdrawn from the path of movement of the pins 202. It will be obvious that after four such advancements of the retracting ratchet in dial retracting direction, the

shaft I is caused by the biasing action of springv I00. Movement of shaft I in a clockwise direction causes it to rotate the shaft 00 in a coun- '70 This counter-clockwise movement of shaft ,00

tar-clockwise direction (as viewed in Figure 3).

causes valve 0| to be moved towards closed position. As previously explained, the movement of the shaft in this manner is limited by the engagement of arm I00 with the right hand end of lever I02. The arm I00 is so spaced angularly with respect to arm I40 that when the arm I00 engages the right hand end of lever I02, the main valve will have engaged its seat thereby cutting ofl the main flow of gasoline through the valve. The minimum flow valve will be open, however, to permit a small amount of gasoline to flow to the delivery hose. As a result, the operation of I the meter is slowed down and consequently the operation of shaft I02 and cam I20 is similarly slowed down.

Upon the next revolution of cam I20, the subtracting ratchet is moved an amount corresponding to another five cents on the dial. In other words, the dial is moved to the zero position. When this occurs, the toe I01 of cam I01 engages the left hand end of lever I02 rocking the same in a clockwise direction and thereby moving the right hand end thereof away from the arm I00. When this occurs, the biasing action of spring I00 is unrestrained so that the valve II can be moved to completely closed position.

As soon as the valve 0| is moved to a completely closed position, the lever I00 is eii'ective to retract the slide latch IOI to permit bell crank lever 02 to rotate to a position in which switch is open. This causes interruption of the energizing circuit to motor 20 so as to stop operation of the pump. It is to be noted, however, the

30 flow of gasoline ceased as soon as the valve 0| was closed. In this manner, a much more accurate measurement of the dispensed gasoline is obtained than where the motor alone is shut off when the predetermined amount of gasoline has been dispensed.

At this stage of the operation, the preselector dial I00 is in the position where the numeral zero appears behind the window I00 as previously explained. The wheels of the registering mechanism ll are in such a position that the amount of seventy-five cents appears in the amount window. This is the amount for which the preselector dial was originally set. Regardless of what may have been the original setting of the preselector dial, the amount indicated in window 40 when the dispensing operationis completed, will be the value for which the preselector dial was originally set. In other words, the subtracting mechanism is so correlated with the registering mechanism that the subtracting mechanism moves the dial back to zero simultaneously with the registering wheels arriving at the desired value.

In order to obtain more gasoline, it is necessary to reset the registering means. It is impossible to close the switch 00 before this is done, because of the interlocking mechanism 00. This resetting is rotated through an angle of 360, then 45 further, and then back to the 360 position. When this operation is completed, the numerals of the amount and gallonindicating wheels will all be at zero. With the pump of the present invention. this movement of the reset shaft performs certain other functions. When the shaft 02 is so moved, the arm I11 carried thereby is similarly moved and engages the free end of lever I14 to rock this lever about a pivot. When the arm I11 engages the free end of lever I'll, the resulting rotation of lever I10 causes lever I10 to be rocked upwardly freeing the hook 112 from the pin 161. The combined biasing action of spring 145 and the springs of the strain release connection 168 is then effective to rotate the segment gear 161 in a clockwise direction (as viewed in Figure 3) until the teeth thereof are in engagement with the teeth of pinion gear 163.

The apparatus is now in position for being operated again. The numeral wheels are all at zero. The teeth of segment gear 161 are in engagement with pinion gear 163. Let it now be assumed that the customer desires to purchase forty cents worth of gasoline. This involves the depositing in the coin slots of the machine of coins totaling forty cents. This, of course, can be accomplished by any combination of five cent, ten cent, and twenty-five cent pieces. Let it be assumed that a customer desires to use a twentyfive cent piece, a ten-cent piece, and a five cent piece. Let it be further assumed that he first deposits the twenty-five cent piece in that coin slide of the coin mechanism 225 which is adapted to receive a twenty-five cent piece. The coin is deposited in the opening 235 and the slide 234 is shoved inwardly. As the slide is shoved inwardly, the lever 241 is rocked in a clockwise direction to rock arm 294 and move the tonque 284 of lever 283 out of the spiral track 211, all as previously explained. The spring 284 is thereupon efiective to rotate lever 283 back in a clockwise direction until it engages the hub of the disks 210. As the slide is pulled outwardly again, the arm 294 is rocked back upwardly and tongue 284 is allowed to move into the spiral track 211 adjacent the hub of the disk 210. This rotation of lever 283 tilts switch 280 so that the switch is now closed. As result of the closure of this switch a circuit is established to field winding 265 as follows (as shown in Figure 3) from conductor 341, through conductor 341, switch 280, conductor 348, field winding 265, and conductors 349 and 350 to the other line wire 345. At the same time, an energizing circuit is established to relay winding 336 as follows: from line wire 341 through conductor 341, mercury switch 280, conductors 348 and 351, relay winding 336, and conductors 352 and 350 to the other line wire 345. As a result of the establishment of the above circuits, both the motor 262 and the relay 335 are energized.

The energization of the motor 262 results in the disks 214, 215, and 216 being driven in a counterclockwise direction along with the spiral disk 210. Let it be assumed that the twenty-five cent piece which has been inserted is a genuine twenty-five cent piece and is not defective in any way. The

coin will then pass down the tube 231 and will pass through the slug detector 228 without any delay. The coin will then enter the coin track formed by rib 306 and disk 216 and will be propelled through this track by the action of disk 216 which firmly engages the twenty-five cent piece. As the twenty-five cent piece rolls through this track, it successively engages fingers 314, 315, 31 I, 312, and 313. The successive engagement with fingers 314 and 315 causes the switch 321 to be closed twice. Each time th'at switch 321 is closed, a circuit is established to solenoid winding 210 as follows: from line wire 341 through conductors 354 and 355, switch 321, conductors 356 and 351, solenoid winding 210, and conductor 358 to the other line wire 345. Each time that such a circuit is established, the solenoid core 201 is drawn to the right so as to cause pawl 213 first to be lowered into the path of pins 202 and then to engage the pins and rutate the disk 108 the distance between two pins. It will be obvious that switch 325 is connected in parallel with switch 321 by conductors 355, 358, 360 and 356. Thus, as the twenty-five cent piece successively engages fingers 311, 312, and 313, and thus actuates switch 325, the energizing circuit to solenoid 310 is closed three successive times. Thus, the passage 01 the twenty-five cent piece through the coin track bounded by rib 306 results in the energization of solenoid winding 3'10 five successive times to advance the disk the distance of five spaces between the pins. As previously pointed out, the distance between any two pins results in the dial being moved ahead the distance of five cents on the dial. Thus, the insertion of a twenty-five cent piece causes the dial coupled to disk 108, to be moved to the twentyfive cent position.

After the twenty-five cent piece has passed the last finger, it passes outwardly into a suitable coin receiving safe 310. At this time, the tongue 284 will have been carried sufficiently far out into the spiral track as to rock switch 280 to the position shown in Figures 3 and 5 in which the mercury switch is in circuit open position. This causes deenergization of the motor 262 and the relay winding 335.

During the time relay winding 335 was energized, the switch 339 was open. Since, as previously explained, this switch is in the energizing circuit of motor 25, it was impossible while motor 262 was in operation to cause energization of the motor 25. Since relay 335 is now deenergized, it is possible for the pump to be placed in operation as desired. Since, however, only twenty-five cents worth of gasoline will be dispensed and it is desired to dispense forty cents worth, the customer will wish to deposit further coins.

Let it be assumed that the customer now deposits a ten cent piece in the appropriate slide. When this is done, the lever 241 is again rocked in the process of inserting the coin with the result that the motor 262 is again energized for a predetermined period of time. The ten cent piece, if genuine and not defective in any respect, will pass through tube 238, through the slug de-' tector 221, and will enter the coin track bounded by rib 305 and disk 215. In passing through the coin track it will deflect fingers 311 and 314 causing switches 321 and 325 each to be closed once. Each time that these switches are closed, the winding 210 is energized to advance the dial 100 the distance of five cents. The result of the deposit of the ten cent piece following the deposit of the twenty-five cent piece is that the dial will now assume the thirty-five cent position.

It will be assumed that the operator now deposits a five cent piece. Even if this deposit is made before the motor 262 has stopped running, there will be no damage since the depositing of the coin will automatically throw the lever 283 back to the inner portion of the disk 210 and insure a full cycle of operation. The five cent piece will pass through the tube 239 and, if not defective in any respect, through the slug detector 228 and the coin track bounded by rib 304 and the disk 214. As the coin passes through this coin track, it engages the finger 314 to close the switch 321 and hence energize the solenoid winding 310 once. This causes the dial 100 to be further advanced the distance of five cents so that the numeral 40 now appears through the window 103. As soon as the finger 284 of lever 283 reaches the outer portion of spiral track 211 so as to cause deenergization of lever 262 and relay 305, the pump can be placed into operation. This is accomplished by pressing the push button 35 inwardly against .the downwardly extending arm of bell crank lever 32 rocking the same in a counterclockwise direction. Such counter-clockwise movement of the lever 32 causes switch 30 to be closed to establish the circuit to motor 25 previously traced. As soon as motor 25 is thus energized, the pulley 28 is rotated to start operation of the pump. At the same time, the pinion gear I5: is rotated and since this pinion gear is in mesh with the teeth of segment gear IGI, the segment gear' ISI is rotated in a, clockwise direction until the teeth of the segment gear have cleared the pinion gear. When this happens, the pivot pin I61 will have passed beyond the line extending between the stub shaft I62 and the pivotal connection of rod I66 with lever I43, so that the biasing action of spring I45 is now effective to continue theclockwise movement of segment gear IIiI. This movement continues until the pivot pin IB'I engages the hook I12, whereupon further movement of the segment gear is permitted. The parts will now again be in the position shown in Figure 3. Because of this movement of segment gear I6 I, during which movement the pivot pin I61 passed through the lowermost possible position, the lever I43 was rocked in a counterclockwise direction to cause a clockwise or valve opening movement of shaft 84. At the same time, the movement of shaft I44 in a counter-clockwise directionlas viewed in Figure 3) moves the arms I49 and I50 to a positionwherein they are held by the levers I5I and I52, the arms riding over the inclined edges adjacent the right hand ends of these levers. Had the push button 35 been pushed inwardly. before the preselector dial was' moved from the zero position, the movement of valve shaft 84 to a valve open position would have i had n'o'eflect due to the fact that there would be;

nothing to holdthe valve open. This is the case, because the toes I55. and I5! of cams I05" and I' I hold'the levers I! and I52 in their inopera tive position, when the preselector dial is in its zero position. As a result allthat would have zero position, the'valv'e. is held open by.the enin Figure 7. takes the place of switching mechanism 229 in the previously described species. The switching mechanism of Figure 7, as will be clear from the following description, is somewhat simpler than the switching mechanism 228 and furthermore, is more adaptable for use of coins 403, or 404, the coin engages the finger 40! pro jecting into that tube and tilts the lever 405 in a clockwise direction, thereby tilting the mercury switch to closed position. It is to be noted that the lever 405 is mounted so that the weight thereof is only slightly unbalanced so that a very small force is required to tilt the lever. It will be further noted that the tubes 4 02, 403, and 404 are curved at 40I to facilitate passage of the coin after it has tipped the lever 405. Thus, each time that a coin is inserted in any one of the tubes 402, 403, and 404, the switch 408 is momentarily closed.

The switch 408 indirectly controls the energization of a motor 4I0. This motor-comprises the usual field winding 4 and a rotor H2. The rotor H2 is connected to a reduction gear train 3 which is in turn secured to a shaft 4. Secured to this shaft are three disks H5, H8, and 1. Each of the disks 4I5, 4| 6, and H1 carries a' plurality of pins 8. The disk H5 is shown as having five pins 8, the disk -4I8as having ten pins M8, and the disk 4". as having twenty pins 4I8. In the particular embodiment of the invention described in this specification, each of these pins corresponds to five cents of the inserted money. Thus, the disk 4I5is intended to be used gagement of arm I48 with the lever I5I' (as shown I in Figure 3). The various elements aren'owin the position shown except for the particular setting oi. the dial and the registering mechanism. As the gasoline is dispensed, the subtracting ratchet I02 will be periodically moved one notch until the value of five cents appears behind the window I03. Theaction of first moving the valve 8I to a minimum flow p'osition'and then to a complete shut-off. position will be repeated in the manner described with the result'that when forty cents worthof gasoline has been dispensed; the flow of gasoline will be abruptly terminated.

in connection with twenty-five cent pieces, the

disk H6 in connection withfifty cent pieces, and thedlsk 4I'I inconn-ection with one dollar pieces.

It will be obvious that any other disks with suitably spaced pins ca'n'be provided, if desired. As indicated by'an arrow adjacent the disk M5, the disks-M5, H6, and 4" are driven in a counter clockwise direction by the motor 4 I 0.

Associated with the'disksf4l5, H6, and '4" are switches 420, 42I, and 422. These switches are It will beseen that my liquid dispensing mechanism-provides for deliveryof an amountof gasoline dependent upon the, total value of the inserted coins. Moreover, this is done without in any way restricting thetype of coin' insertion means or slug detecting means which is employed. I

- Species of Figure 7 ,carried by switch carrying arms 423. 424, and 425. The arms 42-3, 424,' and 425 are only slightly unbalanced upon, their pivotsso that a relatively small force is required to tilt them in a clockwise direction to closed position. The left hand ends of the levers 42,3, 424, and ,425 are associated with the pins of the respective disks. Thus, as the disks 4I5, 4I6, and 4H are rotated, each of the switches 420, 42I, and'422 is tilted for each revolution of the disks asmany times as there are pins on the disk associated with the switch. Thus, upon one revolution of disk 5, switch 420 is tiltedfive times. Similarly, switch 42I is tilted ten times for each revolution of disk H6 and switch'422 twenty times for one revolution of disk In Figure '7 there shown a, modified form of a "inotor driven coin operated switch. It is to be understood that this switch mechanism as shown controlled by a solenoid 442.

- The movement or disks 5, m, and m is Associated with this solenoid-442 is an armature 443 which is carried on the left hand end of a lever 444. The lever 444 carries a mercury switch 445, pivoted at a point such that the lever is substantially balanced about its pivot point. Thus, the solenoid is capable of moving the armature 448 up into engagement therewith. Projecting downwardly from the left hand end of lever 444 is a pin 441 which projects into a notch 448. When the pin described, switch 445 is moved to closed posh tion. As will be explained later, the switch 445 controls the energization of motor so that upon solenoid 442 being energized, the circuit to motor 0 is closed.

Each of the lower ends of tubes 402, 403, and 404 are designed to permit the exit of the associated coin into a central funnel 450 leading to the coin receiving safe. Associated with the lower ends of these tubes are solenoids 451, 452, and 453. Each of these solenoids controls the position of a mercury switch carrying lever, these levers being designated by the reference numerals 454, 455, and 458. Carried by levers 454, 455, and 458 are mercury switches 458, 459, and 480. The mercury switches are so positioned with respect to the pivot points 452, 463, and 484 of the levers that the mercury switches tend to bias the levers away from the solenoids. Due to this biasing action of the mercury switches and due to the spacing of the armatures from the solenoid, the solenoids are incapable by themselves of moving their associated armatures into engagement therewith. In other words, the mere energization of one of the solenoids 45! to 453 does not insure that it will pull its associated armature into engagement therewith. Thus, the energization of the solenoid alone does not change the circuit closing position of the respective switch of the switches 458, 459, and 450. Accordingly, further means are provided for aiding the solenoids. It will be noted that the left hand end of each of the levers 454 to 458 projects into the end of the coin chute in such a way that any coin passing through the chute will have to deflect this lever in a counter-clockwise direction. Such counterclockwise deflection of the lever will momentarily move the armature into engagement with the electromagnet. The solenoid is thereupon effective to hold the armature after it has been so moved.

Operation of species of Figure 7 The mechanism of Figure 7 is shown in the position it assumes when no coin is passing through it. Let it be assumed that a twentyflve cent piece is inserted in the tube 239, which as previously explained, connects with the tube 404. As this twenty-five cent piece passes finger 401 projecting into the tube, it tilts lever 405 to close the switch 408. This closure of switch 408 is maintained for a brief interval of time during which the twenty-five cent piece is rolling around the curved portion 40!. As soon as theswitch 408 is closed, a circuit is established to the solenoid 442 as follows: from line wire 410 through plained, causing pin 441 to be moved out of the slot 448 and causing mercury switch 448 to'be closed. The moving of pin 441 out of slot. 448 causes the disks M5, 4", and 4l1 to be free to rotate. The moving of switch 445 to circuit closed position establishes a circuit to the motor 4" as follows: from line wire 410 through conduc tors 4" and 419, switch 445, conductors 480 and 4", held winding 4, and conductors 482, 488, and 418 back to line wire 418. Motor 0 is thereupon energized to cause rotation of disks, H5, 4", and 4". The moment these disks start to rotate, the slot portion 448 moves from underneath the pin 441 thereby preventing pin 441 from dropping down. This prevents return movement of lever 444 and the opening of switch 445. In other words the insertion of the coin closes the switch 408 to energize the solenoid 442. The

energization of this solenoid in turn closes the switch 445 to start the motor and move the disk from affecting the energization of solenoid winding 2i0.

Thus continuing with the case of a twenty-five cent piece, after the twenty flve cent piece has passed the lever 405', producing the action previously described, the coin passes further down the tube 404 until it reaches the exit, at which time it engages the left-hand end or lever 458. Upon so engaging the left hand end or lever 458, it tilts this lever in counter-clockwise direction causing the armature to be moved intoproximity to the core of solenoid 453. When this happens, the armature is retained by this solenoid inasmuch as the solenoid is now energized by the following circuit established when switch 445 was closed. From the line wire 410 through conductors 41!, 419, switch 445, conductors 480, 485, and 488, solenoid 453, conductors 481, 488, 483, and 418 to the other line wire 418. It will be observed that solenoids 45l and 452 are connected in parallel with solenoid 453 by conductors 490, 502, 49d, 493, 503, and 492. Thus, at the same time that solenoid 453 is energized by the closure of switch445, solenoids 45l and 452 are likewise energized. Due to the fact that the solenoids are unable to attract the armature unaided, only those switches will be closed, however, in which the coin has passed through the associated chute. Thus, if a twenty-five cent piece is the only piece that has been inserted at a given time, the arm 458 will be the only one that is tilted into a position at which the solenoids can attract the armature. Thus, the mercury switch 480 will be the only one that is closed. As previously indicated, the mercury switches 458, 459, and 480 control the connection of switches 422, 42l, and 420, respectively, with the solenoid 208. Thus, the circuit between the solenoid winding 2i0 and the switch-420 is as follows: from line wire 410, through conductors 504, 505, and 494, switch 420, conductor 495, switch 480, conductors 498, 491, and 498, solenoid winding 2i0, and conductor 499 back to the line wire 418. Inasmuch as switch 480 is closed, this circuit is closed each time that switch 425 is closed or, in other words, each time that the am 423 is engaged by one of the pins 4i! of disk 4|5. As previously explained, since there are live pins 4" on disk "5, the switch 420 will be closed five times in connection with the passage of the coin through the apparatus.

The motor ,4" will continue to revolve the disk "5 until such time as the notch 445 again comes under the pin 441. Inasmuch as the solenoid is only momentarily energized, it exerts no attractive force on armature 443 and as soon as the slot 446 does come into the position-just mentioned, the pin 441 will drop down in this slot rocking the lever 444 in a counterclockwise direction and thereby causing the opening of switch 445. The opening of switch 445 automatically deenergizes the motor 4" and the solenoid 4". The locking of pin 448 prevents any overshooting when the motor 4|ll closes. Thus, when the disk has completed its rotation, it is instantly stopped and the motor driving the same is at the same time deenergized.

It is believed unnecessary to describe in detail the operation in connection with the fifty cent and dollar pieces. When a fifty cent piece is inserted, it tilts the switch 408 in the manner which has been previously described in connection with twenty-five cent pieces. The same sequence of operationis initiated whereby the disks are placed in motion. In this case, the fifty cent piece tilts the lever 455 causing the switch 459 to be closed. As a result of the closure of this switch, the pulsations of switch 42! are the ones which control the energization of solenoid winding 2l0. 'Due to the fact that there are ten pins 4l8 on disk 6, the solenoid-winding will be energized ten times. When, on the other hand, a dollar coin-is inserted in the machine, the switch 458 will be closed and inasmuch as this switchis in circuit with switch 422, it is the switch.422.that controls the current to sole noid winding 2"). In this case, the winding 2! will be energizedtwenty times corresponding to the twenty five cent divisions in a dollar.

The species of Figure 7 has the advantage that it is capable of being adapted to coins of almost any denomination. -It will be readily observed that-all that it is necessary to do is to change the number of pins 8 in connection with the disks 5, 416, and 4H.

' Species of Figure 8 In Figure 8, I have shown a further motor driven means for setting dial I00. Inthe two previously described species, a pawl is associated with a pin disk secured to shaft lill and this pawl is actuated by a solenoid which is period ically energized in accordance with the value of the coins inserted. In the present species, a

motor is connected through releasable clutch means to the dial and this motor is continuously energized until the dial is set at the value corresponding to. the value of the coin inserted.

Referring specifically to Figure 8, the reference numeral 525 is employed to indicate a motor which sets the dial Hill; This motor which may be of the ordinary induction type, comprises a rotor 525 and a winding 521. The rotor-has secured thereto a worm gear 525. The worm gear 529 meshes with a worm wheel gear 550 which has associated therewith a spur gear 5" of smaller diameter meshing with a spur gear 532 of larger diameter. The worm gear 529 and the gears 53., Ill, and 532 form a speed reduction mechanism between the 'rotor I25 and a collar 534 secured to gear 552. The collar 584 is rigidly secured to gear 552 so as to be movable as a unit therewith. The collar ll4 and gear 532 are freely mounted on a shaft 455. The left hand face of collar 554 is serrated to cooperate with serrations on the right hand face of a collar 55]. The collar 531 is associated with a sprocket wheel III and a further serrated collar 538. The sprocket wheel 53. is connected by means of a sprocket chain 546 to a sprocket wheel associated with dial ill. The sprocket wheel 555 and the collars 551 and 555 are secured together as a unit and are also freely mounted on shaft 535. The serrated collar 535 is adapted to cooperate with a serrated collar 54] which is secured to a disk 542. The disk 54! and the collar 5 are longitudinally slldable on shaft 536, the sliding movement being limited by a pin 551 secured to shaft 535 and projecting through a slot 555 in collar 5.

The serrated disks 534 and 531 have opposing recesses 542 and 543 designed to receive a coil spring 545. The purpose of the coil spring is to bias the collars 534 and 531 apart and thereby prevent engagement between the teeth of the respective collars. A similar spring 548 is located between collars 535 and 54L It is to be understood that these collars are similarly provided with opposing recesses to receive the spring 545.

' Cooperating with the collar 542 is a further unit comprising a lever 544. This lever is pivoted at 545 at its lower end and carries two nipples 545 and 545. The nipples are designed to engage the disk 542 when lever 544 is moved in a clockwise direction.- A collar 54'! secured to lever 544 and freely slldable on shaft 555 guides this movement of lever 544. The lever is operatively connected to a solenoid core 555 of a solenoid 55!. a winding 552. Upon energization of solenoid winding 552, the core 550 is moved to the right. This action is opposed by a spring 554. .It will be obvious that whenthe upper 'end of lever 544.is moved to the .right, the disks 5, 538, 531, and 534 are moved together; so that the teeth thereof are brought into mesh. Under these conditions, the rotation of collar 534 by the motor 525, will cause the rotation of collars 554, 531, 535, and 5".

The pin and slot connection comprising pin 55'! and slot 555 permits the longitudinal movement of collar 54! necessary to clutching and declutching the collars 534, 531, 538, and 5 but prevents rotation of shaft 436 relative to collar 54L Thus, upon collar 5 being rotated, the shaft 536 is similarly rotated.

Secured to the shaft 536 are three disks 550, 56!, and 562. The disks 560, 56!, and 562 are all rigidly secured to shaft 536 so that upon rotation of shaft 556, the disks are correspondingly rotated. Each of the disks has a lug secured thereto, the lugs being designated by the reference characters 564,555, and 565, respectively. These lugs are designed to cooperate with mercury switch carrying levers 568, 569, and 510. These levers carry mercury switches 5H, 51!, and 513, respectively. Switches 51!, 512, and 513 arenormally in a circuit closed position. Upon the lug engaging the downwardly extending arm of one of the switchv carriers, however, the corresponding-switch is tilted to circuit open position. The lugs 554, 555, and 565 are so spaced on their respective disks that they engage the downwardly extending arms of the associated Associated withthe core in is' switch carriers when the preselecting dial reaches the twenty-five cent, the fifty cent, and the dolgage lug 564 and limit return movement of the shaft 586. The shaft is biased by a helical spring 511 surrounding and secured to shaft .536 at one end and secured to a fixed member 518 at its other end.

A plurality of conventional coin receiving tubes are provided, one for each of the coins for which the machine is adapted to receive. In the embodiment described in Figure 8, the machine is adapted to receive twenty-five cent, flfty cent, and one dollar coins. Any suitable slug detecting mechanism may be provided. The slug detecting mechanism incorporated is substantially the same as that of the species of Figures 1 to 6. At the lower end of each of the coin receiving tubes, I provide a relay armature actuating means which has been illustrated only in connection with the dollar coin. Closing off the tube at a predetermined point is a gate 580. This gate is adapted to be swung outwardly through a slot adjacent thereto by any suitable automatic means 7 as will be mentioned later. Upon the coin reaching this gate, its further progress is stopped. Associated with the tube immediately above this gate is a lever 58! which is pivoted at 582. The outer arm of this lever is connected with a rod 583 connected with an inwardly-projecting arm of a bell crank lever 594' pivoted to the casing l2. Cooperating with the bell crank lever 584 is a push button 585 which projects through the casing I2. Upon push button 585 being pushed inwardly, the bell crank lever 584 is rocked in a clockwise direction to move rod 583 upwardly. The bell crank lever 58! has an upwardly extending arm provided with a coin engaging portion adapted to extend through a slot in the coin tube adjacent the coin which has been indicated by the reference numeral 586. Opposite the slot through which the coin engaging portion of lever 58l extends is a further slot into which extends a pusher disk 581. The pusher disk 581 is connected through rod 588 to an armature 589 cooperatively associated with a relay coil and core 590. The relay armature 589 carries a pair of mercury switches 59 I and 592. These switches are shown in their circuit open position. When the armature 589 is moved into engagement with the relay 590, the two switches 59l and 592 are moved to circuit closed position. As will be explained later, upon the armature being so moved, the closure of switches 59! and 592 causes a holding circuit to be established to the relay coil 590. It is to be noted that the coin 581 in effect forms a link in the means for actuating the armature 589 by means of push button 585. Thus, unless a coin is present in the space between the coin engaging portion of lever 58l and the pusher disk 581, the actuation of button 585 has no effect upon the magnet.

It is to be understood that a similar armature actuating means is provided in connection with each of the coin receiving tubes. For purposes of simplicity, only the relays and the armatures have been shown in connection with the coin receiving apparatus for the other coins. The relay 594 is provided with an armature 595 which armature carries mercury switches 596 and 591. These switches are normally in circuit open position but upon the armature being moved into engagement with the electromagnet, both of these switches are closed. The armature. 595 has connected thereto a rod 599 which, it will be understood, is associated with apparatus similar to that with which rod 588 is associated.

Similarly, relay 600 cooperates with an armature 60!, which carries mercury switches 602 and 603. Similarly the armature GM is connected to a rod 605 which is designed to cooperate with suitable actuating mechanism such as is shown in connection with the dollar coin mechanism.

The mechanism for actuating the gates 580 may take any suitable desired form in which means are provided for automatically opening these gates after an operation initiated by the insertion of the coin has been started. Thus, the gate may be opened by means driven by motor 525 or by the meter l8.

Secured to shift l0l are three stop disks 605, 606, and 601. The purpose of these stop disks is to insure that the dial I00 stops exactly at the desired position. While, as will be explained later, the mechanism is designed to deenergize the motor 525, and to declutch the disks 560, 56l, and 562 when the dial I00 has reached the desired position, it is possible in some cases for there to be a slight amount of over travel due to wear of the mechanism. In order to prevent this and to insure that the dial stops at exactly the desired position, the stop disks 605, 606, and 601 are provided. Each of these stop disks carries a lug, these lugs being designated by the reference characters 609, H0, and 6. It is to be noted-that these lugs are secured to the disks at different angular positions. These positions correspond to the desired rotation of dial I00 for the various denominations of coins to be inserted. Associated with each of the stop lugs 609, M0, and 6 is a stop arm, these arms being designated by the reference numerals H3, H4, and M5. Only the stop arms H3 and 6| 5 have been illustrated in detail. It will be noted that the stop arm 6l3 is pivoted at 6". The upper end of the arm H3 is connected by a link BIB to a solenoid core 6l9 with which is associated a solenoid winding 620. It will be obvious that upon energization of the solenoid winding 620, the core H9 is moved to the left, thereby rocking the stop lever H3 in a counter-clockwise direction to the dotted line position in which the right hand upturned end of the stop lever 6| 3 is in the path of the stop 609. As will be explained later, the winding 620 is energized when the relay cell 600 is energized. Relay coil 600 is energized only when a twenty-five cent coin is inserted. It will be obvious therefore, that the stop lever H3 is in its motion arresting position only when a twentyfive cent coin has been inserted.

In order to simplify the" description, the sole noid actuating mechanism for stop arm 6 has not been illustrated. This solenoid mechanism, however, corresponds to that previously described in connection with arm H3 and comprises a solenoid winding energized whenever the relay 594 is energized.

The actuating mechanism of stop lever H5 is shown as comprising a link 622 connected to a solenoid core 623; Associated with the solenoid core is a solenoid winding 624. of lever 6I3, energization of the solenoid causes the lever M5 to be rotated in a clockwise direction into the path of the stop 6. The solenoid 624 is connected in parallel with the relay 590 so as to be energized whenever this relay is energized, or, in other words, to be energized whenever a dollar coin has been inserted.

As in the case Operation species of Figure 8 The subtracting mechanism is operating to pe-,

riodically retract this dial until the valve is completely closed and the. pump, motor is stopped.

Let it now be assumed that a purchaser desires to purchase a dollars worth of gasoline. In

this event, a dollar coinis inserted in the-proper coin receiving tube designated in the drawings by the reference numera1'519. The coin is stopped inits passage by the gate 555 and the push button 585 is then pushed inwardly to move thecoin,

which is-designated by reference numeral 555, to the left to move thearmature 589'into engagement with the coil 595. This movement of the armature causes switches 59! and 592 to be closed, as previously explained. The closure of switches 59! and 592 causes a. holding circuit to be established to relay coil 595 as follows: from lineiwire 535 through conductor 53!,.switch 59!. conductor 532, switch 513, conductors 534 and 635, switch 592, conductor 535, relay coil 59!], and conductors 531, 538, 539, 51!, 645, and 54! back to the other line'wire 543. The energization of relay coil 595 by the circuit just traced causes the relay coil to hold the armature in engagement therewith even after the button 585 is released and the coin is allowed to pass on through the tube by the opening of the gate 585.

As previously indicated, each of the solenoid windings of the solenoids which actuate arms 5l3 to H5 is connected in parallel with the associated relay. Thus, at the same time a circuit is established to relay-:coil 595, a circuit is estaby lished to solenoidwinding 524 as follows: from line wire 535 throug-li conductor 53!, switch 59!,

conductor 6'32, switch 513, conductors 534 and 535, switch 592, conductors 535 and; 553, 'relay coil 524',fland conductor's- 554, 539, 51!",1545; and 54! .back to the-other; line wire,5 43.' 'Thus, at the same time relay 5951s energized,- solenoidwindhigher numbers behind the window.

dial I55. The-preselector dial is rotated in a clockwise direction so as to bring successivel Movement of the preselector dial is terminated by the engagement of stop arm 5!5 with stop lug 5!!. It will be recalled that this arm M5 was moved into the path of lug 5!! at the same time as the relay coil 595 was energized.

At just the instant that the stop lever 5l5 engages the stop lug 5!!, the lug 555 of disk 552 engages the downwardly extending arm of the switch carrier 515. The result of this is that the switch carrier is tilted in a clockwise direction moving mercury switch 513 to circuit open position. It will be recalled that switch 513 was in the circuit of the motor field winding 521 and the solenoid winding 552 as well as that of the relay 595 and the stop actuating solenoid 524.

Thus, at the same time that further movement of preselector dial I55 is stopped by the engagement of the stop lever 55! with stop lllg 5! I, the solenoid 55!, the relay 595, and the solenoid winding 524 are all deenergized. The deenergization of the solenoid 55! results in the declutching of shaft .535 and sprocket wheel 539 from motor 525. It is very important that these be declutched so that the preselector dial is free to turn through the action of the subtracting mechanism. It is to be recalled that it is necessary for this subtracting mechanism to periodically retract dial I55 and if some declutching means were not employed, the subtracting mechanism would be ineffective.

The deenergization of relay winding mmsures that switches 55! and 552 are moved to open position to require the insertion of a further 1 coin to cause their reclosure. g I As soon as the solenoid 55 is deenergized so as to result in a declutching of shaft 535, the coil spring 511 is effective to immediately rotate shaft 535 in a clockwise direction until the lug 554 engages the stop 515. This is desirable because the disk shouldbe returned to the stop position to be.

- ready for the insertion of another coin.

mg 524is energized to mov e the1rig'ht hand end of stop arm 5l5 into1the lbathof movementvof st oplug5!.!. I A

The closure .of switch 5st also este nsnes e If the operator desires, to purchase only twenty five cents worth-of gasoline, atwenty-flve cent coin is inserted and by means of a suitably actuated push button-not shown, the armature 55! is moved into engagement with thezelectromagnet circuit to. motor .525 as follows: from line i'wire',

535 through conductor53!,'switch 59!, conductor m; switch 513,'con'ductqrs sat-mans, 541 and 545, field winding 521, "and conductors 549, 555, I

- and 54! back to the'other line wire. 543;'. The,,' establishment of this circuit causes energization of 1555., When this happenaswitches 552 and 553 are closed. The'closureof these switches results in the establishment of an energizing circuit to motor field winding 521 as follows: from line wire motor 525 and the consequent rotation ofthe gear a train including worm 529 and gear 532.' I

Itwill'be noted that the solenoid winding m is connected inparallel with the motor field windin'g'521 by conductors 545, 549, 55!, and, 552.

Thus, at the same time that motor field winding 521 is energized, solenoid winding 552 is also en-'- a ergized.

The energization of, solenoid winding 55! simultaneouslywith that of motor field winding 521 causes collar 54!.1 to be moved to the rightinto engagement withcollar 535 and collars 531 and 534 to be moved into engagement with each other.

The result'of this isthat the rotation-of motor 525 is imparted'to shaft 535 causing the disks 555, 55!, and 552 to beturned in a countersults in the establishment of an energizing circuit through the solenoid $555 as follows: from the clockwise direction as viewed. in Figure 8. The

sprocket wheel 539 isa'lsorotated so as torotate through the. sprocket chain' 545 the preselector 535-through conductors m and 552,'switch m, conductor 553, switch 51!, conductors '554, 541,

and 545, motor field winding 521, and conductors 549, 555, and 54! back-to the other line wire 543.

At "the same time, an energizing circuit is established to the solenoid winding .552 whichiscon nected in parallel with motor field winding 521.

"The closure of switches 552 and 503 also .re-

line wire'535 through conductors 55! and 552,

switch'5'52, conductor 553, switch 51!, conductors 554, 545, 555,551, and 515, switch 553, conductor 515, solenoid 555, and conductors 515, 51!,

545, and 54! to the other line wire 543. The establishment of the last circuitalso establishes a circuit to solenoidwinding 525 which .is connected in parallel with the solenoid 555. It will be obvious that the operation is the same except with stop lug 555 that terminates movement of 'that'it is now the engagement of stop arm 5l3 pres-elector dial !55. Similarly, it is the engagement or the lug I" with the downwardly extending arm of switch carrier I" and the resultant tilting of switch I'll to circuit open position which deenergizes the solenoid I20, the solenoid l", the motor 525, and the solenoid I. I

When a fifty-cent coin is inserted, it is thearmature 595 which is pushed into engagement with the electromagnet 591 and it is the switches "l and 591 which are closed. In this case, the energization circuit to the motonileldwinding llt is from line wire 630 through conductors "I and $13, switch 596, conductor I'M, mercury switch 512, conductor 56B and from that point on, the same as in the previously traced circuits for motor 525. The circuit to the electromagnet winding 594 is from line wire 630 through conductor SSI and B13, switch 698 conductor Ill, switch 512, conductors $61 and 888, switch 591, conaces ,5

from the dial so as not to interfere with the operation or the subtracting mechanism.

While I have shown certain specific embodiments of my invention for purposes of illustration. it is to be understood that the inventionis limited only by the scope or the appended-claims.

I claim:

1. In combination, a liquid flow line, a pump for supplying liquid to said flowline, a meter for measuring the liquid passing through said flow line, registering means for indicating thepassage of liquid through said flow line, a valve .in said flow line, preselector means controlled by ductor 8B9, solenoid winding B34 and conductors 633, 639, SH, 850, and l'to the other line wire 643. Since the solenoid iwinding not shown) associated with stop arm 8 is connectedxin parallel with the solenoid 594, the stop arm [it will be moved into stopping position when the electromagnet 594 is energized. It is believed that the action in this case is otherwise obvious from the description in connection with the insertion of a dollar and twenty-five cent pieces.

It will be seen that in this embodi'ment, provision can be made for any denominations of coin. All that is necessary to ,dois to provide the various stops in necessary locations with respect to their dials.

When the stop mechanism comprising arms M3, Bill, and BIS is employed, itwill'be obvious that the preselector dial can be set at a position corresponding only to the value of due coin. In other words, the machine cannot beset for the cumulative value of several coins. In many cases, this ofiers no objection whatsoever. This is particularly true with the machine of the type described and which is adapted to receive twenty-five, fifty and one dollar coins. In such cases, this amount of gasoline is usually sufllcient. However, where it is desired that the. machine operate in accordance with thecumulatlve value of a plurality of coins, the, stop mechanism-comprising arms H3. H4, H5 can ,be eliminated;

The only restriction which is then necessary to 0 place upon the user is to insure that the preselector dial has been advanced'to'a value corresponding to the valueof the previously inserted coin before another coin is placedin themechine. If this is done, the preselector dial can be advanced to any position corresponding to the cumulative value of a large number of coins inserted in the machine.

From the foregoing description, it will. bev seen that I have provided in a gasoline vending pump of the type employing a preselector dial and subtracting mechanism for periodically .retardlng this preselecting dial until a, valve is closed, motor means for setting this preselecting dial and means for automatically controlling the operasuch that the motor is normally disconnectedsaid registering means for maintaining said valve open until a predetermined amount 'of liquid is indicated, said preselector means including indicating means adapted to be set to a predeterminedselected amount and subtracting means driven by s'aid registering means for returning the indicating means to a predetermined position in uniform increments corresponding in magnitude, to a predetermined monetary sum. an electric motor means, means for operatively connectingsaid motor means to said indicating xn'eans and'eiljective upon energization of said motor to adviance said indicating means an amount corresponding to one of said increments, means for receiving any one of a plurality oi predetermined denominations of coins, means operative to energize said motor means periodially. a number of times equal to the valueof .any insertedcoin divided by said predetermined monetary sum so as to cause said motor to. set

said indicating means to an amount correspond- .ing to the value of said coin, said registering means and being effective to drive said subtracting means in such a manner that when said indicating means hasreached said predetermined position, the registering means has reachedthe 4o predetermined amount.

2. In combination, a liquid flow line, a pump for supplying liquid to said flow line, a meter for measuring the liquid passing through said flow line, registering means for indicating the passage of liquid through said flow line, a valve in said'fiow line, preselector means controlled 'by said registering means for maintaining said valve open until a predetermined amount of liquid is indicated, said preselector means includ ing indicating means adapted to be set to a predetermined selected amount and subtracting means driven'by saidfregistering means for returning the indicating means to a predetermined position in uniform increments corresponding in magnitude to a predetermined monetary sum, an electric motor means, means for operatively ,connecting said motor means to said indicating means and effective upon energization of said motor to advance said indicating means an amount corresponding to one of said increments, means operative each time that said motor, is deenergized to render said connecting means ineilectivc so as to leave said indicating means free for movement independently of said motor means, means for receiving any one of a plurality of erajtive to energize said motor means periodically. a number of times equal to the value of any inserted coin divided by said predetermined monetary sum so as to cause said motor to set saidindcating means to an amount corresponding. to the value of said coin, said registering means being eiIective to drive said subtracting means in such a manner that when said indicatingmeans has reached said predetermined position, the registering means has reachedthe predetermined amount.-

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