US1978997A - Power actuated carriage return mechanism - Google Patents

Description

Oct. 30, 1934. F. A. HART POWER ACTUATED CARRIAGE RETURN MECHANISM Filed May 20. 1951 5 Sheets-Sheet l \NVENTOR Maui;

Oct. 30, 1934. F. A. HART 1,978,997

POWER ACTUATED CARRIAGE RETURN MECHANISM Fi led May 20, 1931 5 Sheets-Sheet 2 III: w i

5/ /24 i% -VJI mTfi|'miiflimfi| vu ly 3 y I25 5 k I2 @I I 6 r w 130 '32 Iv" E v F 45 4/ k "am/1 35 1 64 II 155" link #48 F? INVENTOR WITNESS E5 7! a. AL)? I BY ATTORNEY Oct. 30, 1934. F, A.HART 1,978,997

POWER ACTUATED CARRIAGE RETURN MECHANISM Filed May 20. 1931 5 Sheets-Sheet 3 WITNESSES Il INVENTOR I BY ATTO4REY Oct. 30, 1934. F. A. HART POWER ACTUATED CARRIAGE RETURN MECHANISM Filed May 20. 1931 5 Sheets-Sheet 4 26 INVENTOR $2M 561/4 UBMAQEWZT ATTORNEY Oct. 30, 1934. F. A. HART POWER ACTUATED CARRIAGE RETURN MECHANISM Filed May 20. 1931 5 Sheets-Sheet 5 INVENTOR WIITNESSES ATTORNEY Patented Oct. 30, 1934 PATENT OFFICE V POWER ACTUATED CARRIAGE RETURN MECHANISM Frederick A. Hart, New Britain, Conn., assignor to Remington Typewriter Company, Ilion, N. Y., a corporation of New York Application May 20, 1931, Serial No. 538,725

23 Claims.

My invention relates to power actuated carriage return mechanism for typewriting machines, combined typewriting and computing machines, etc.

One of the main objects of the present invention, generally stated, is to provide an improved highly effective, power actuated carriage return mechanism which is sturdy and comparatively simple in construction, is reliable in use and is not apt' to become deranged or broken.

Another object of my invention is to provide an improved carriage return mechanism which is actuated from a constantly running motor.

A still further object of my invention is to provide a construction in which the means, in the main, by which motion is transmitted from the constantly running motor, remains quiescent except when the carriage is being returned, thereby materially reducing wear on the parts.

Another object of my invention is to provide a power actuated return mechanism which is smooth running and returns the carriage at a uniform rate of speed, is quiet in its operation, and by remaining quiescent when not actually returning the carriage adds no noise to the operation of the machine at such time as it is not actually employed for returning the carriage, and is of such construction as to make but little noise even when in operation.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts and combinations of devices set forth in the following descripton and particularly pointed out in the appended claims.

In the accompanying drawings, wherein like reference characters indicate corresponding parts in the different views- Fig. 1 is a detail, fragmentary, fore and aft, o vertical sectional view of a combined typewriting and computing machine embodying my inven tion; the section being taken on the line 11 of Fig. 2 and looking in the direction of the arrows at said line.

15 Fig. 2 is a fragmentary, vertical, transverse sectional view of a portion of the machine; the section be'ng taken through the vertically disposed power transmitting shaft.

Fig. 3 is a fragmentary, detail, top plan view of a portion of the machine; the section being taken on the line 33 of Fig. 2 and looking in the direction of the arrows at said line.

Fig. 4 is a skeletonized, detail, side elevation, with parts in section, of the tabulator mechanism and some of the associated parts.

Fig. 5 is a fragmentary, left-hand side elevation of the machine with the cover of the control box shown removed; the view illustrating the means for controlling the carriage return mechanism.

Fig. 6 is a detail, fragmentary, plan view of some of the devices for automatically controlling the return of the carriage; parts being shown in section.

Fig. '7 is an enlarged, detail, transverse, sectional view taken on the line 7--7 of Fig. 3 of the auxiliary control rock shaft together with means by which an adjustment of the arms carried thereby may be effected.

I have shown my invention in the present instance embodied in a combined typewriting and computing machine which from certain aspects may be like that disclosed in my application Ser. N0. 510,941, filed January 24, 1931. It'should be understood, however, that the mechanism of the present invention may be employed in various characters of typewriting, combined typewriting and computing and other like machines. In the present instance I have illustrated only so much of the machine as may be necessary to arrive at an understanding of my invention and its embodiment therein.

From certain aspects of my invention it may be regarded as an improvement on the construction disclosed in my Patent No. 1,567,590, dated December 29, 1925; the present invention, however, being employed in a machine having a constantly running, electric, induction motor as disclosed in my above entitled application, instead of a stop and start, series wound, motor of the 99 type disclosed in my said prior patent.

The frame of the machine comprises a double two-part base 1, corner posts 2 and a top plate 3. In the present instance the usual carriage of a Remington accounting or typewriting machine is shown mounted to travel over the top plate of the machine from side to side thereof, being propelled in the direction of its step-by-step letterspace movements by the usual spring drum (not shown), and under control of the usual escapement mechanism and denominational tabulator mechanism.

The carriage which is shown in part in Figs. 1 and 5, comprises end bars 4, a rear cross bar 5 and a front cross bar 6. The carriage is mounted 105 in the usual manner to travel on crossed bearing rollers 7 received in oppositely grooved bearings of the rear and front cross bars 5 and 6 respectively of the carriage, and in fixedrear and front guide bars or rails 8 and 9 respectively. The car- 110 riage is thus supported and guided and supports a cylindrical platen 10.

Type bars (not shown) may be actuated from key levers 11 in the usual manner of the hand actuated Remington typewriting or accounting machine as the parts are disclosed in the present instance, although the type bars shown in my above mentioned application are power actuated. Each key lever carries an engaging projection 12 beneath which a flange 13 on a locking bar 14 may be swung around its pivots 15 from the releasing position shown in Fig. 1 to the locking position where it prevents an effective depression of each of the key levers. This locking bar 14 is controlled in a manner and for purposes which will hereinafter appear.

In accordance with certain features of the present invention I have combined with the carriage return mechanism, a control means for the latter from the ordinary tabulating mechanism of the Remington accounting machine or typewriting machine and deem it advisable at this point to describe such tabulator mechanism, and

will later refer to the means for controlling the carriage return mechanism therefrom.

The tabulator mechanism disclosed in the present instance is the usual denominational tabulator comprising a frame 16 secured to the main frame of the machine. Denominational stop levers 17 are pivoted at 18 in the tabulator frame and each is provided with a forwardly projecting denominational stop 19 at the upper end thereof. Each of said stops is adapted to be projected forward into effective position in the path of a series of column stops 20 carried by a column stop bar 21 fixedly secured to brackets 22 which .are fixed to and project rearward from the typewriter carriage. The lower end of 'each denominational stop lever 17 is in the path of movement of an associated slide 23, said slides being mounted to move fore and aft of the machine on supporting rods 24 carried by the frame of the machine. their sliding movements by fixed guide combs 25. Each slide has associated therewith a lever 26 pivoted at its lower end, at 27, and moving in a guide'comb 28. A contractile spring 29 is connected to each lever 26 to return it and the parts connected therewith to normal position. Extending forward from each lever 26 is a link 30 pivoted thereto at its rear end, as at 31, and pivoted at its forward end, as at 32,-to the depending arm of a bell crank key lever 33 pivoted at 34. A depression of the tabulator key 33 on a lever 33 is effective to transmit movementto the associated denominational stop lever 1'7 through the intermediate train of connections and project the corresponding stop 19 into the path of the on-coming column stop 20. A universal bar 35 extends in the rear of and coacts with the denominational stop levers 17 below the pivotal center thereof.

It will be understood that at each actuation of the tabulator key the companion denominational stop lever 17 will be moved to the Fig. 4 position and actuate the universal bar 35, and through an intermediate train of connections, to be hereinafter described, will lift the feed rack 36 from engagement with the feed pinion 37, thus freeing the carriage from control of the escapement mechanism. The carriage being thus released is free to travel in the direction of its feed under the force of its spring drum until the first on-coming column stop 20 reaches the projecting denominational stop. The eifect of this depression of a tabulator key 33 not only releases the carriage as These slides 23 also are guided in stated above, but moves the locking bar 14 to effective position to look all of the key levers 11 against depression, and also results in opening both clutches of the carriage return mechanism in order to free the carriage from control of the carriage return mechanism in a manner which will hereinafter appear.

I will now describe the carriage return mechanism of the present invention and will later refer to the means by which a. control thereof is efiected from an operation of the tabulator mechanism, as indicated above. An'upright shaft 38 is preferably mounted on ball bearings and is supported from the frame of the machine and has fixedly connected'to the upper end thereof a pinion 39. This pinion meshes with a rack bar 40 secured to the carriage, as shown in Fig. 1. The vertically disposed shaft 38 has a worm wheel 41 loosely mounted thereon and with which a horizontally disposed worm 42 meshes. The worm 42 is fixedly secured to a driven shaft 43 preferably mounted on ball bearings in a bracket or frame 44 detachably secured to the frame of the machine; said bracket 44 also constituting a support for the shaft 38. The driven shaft 43 is horizontally disposed and extends transversely of the machine. This driven shaft has secured thereto one member 45 of a two-part clutch. The other part or sliding section 46 of said clutch is provided with a peripheral groove 4'1 therein to receive a pin 48 carried by one arm of an angular clutch shifting lever 49. This lever is pivoted at 50 on a bracket arm 51 secured to the main supporting bracket 44. The clutch section 46 is mounted on a main driving shaft 52 supported in a bearing 52 on one of the corner posts 2 of the machine frame. The clutch member 46 has a pin and slot or splined con-.

nection 53, 54 with the drivingshaft 52 in order to connect the clutch section 46 to. turn with the driving shaft but afford a shifting movement of said clutch section on the shaft 52 into and, out of engagement with the companion clutch section 45 on the driven shaft 43.

The shaft 52 extends outward beyond its hearing where it is provided with a drive pulley 55 driven by a belt 56 that passes around and is driven from a pulley 57 carried by the shaft 58 of a constantly running electric induction motor 59. The motor is mounted on a support or bracket 60 which in trim is fastened to the frame of the machine. The driving shaft 52 and the driven shaft 43 are arranged end to end and both are in parallel arrangement with the motor shaft 58.

A second clutch is employed to efiect an operative connection between the worm wheel 41 and the vertically disposed shaft 38. Thus, the worm wheel is provided with depending clutch teeth 61 (see Fig. 2) with which teeth 62 on a sliding clutch section 63 are adapted to coact. The clutch section 63 has a splined connection at 64, 65 with the vertically disposed shaft 38, so as to turn therewith but afford a vertical movement of the clutch section 63 into and out of clutching engagement with the teeth 61 on the worm wheel 41. When this clutch is closed, the worm wheel, which ordinarily is free to turn on the shaft 38, is connected to turn therewith so that any motion transmitted to the worm wheel will rotate the shaft 38, and through the pinion 39 thereon, return the carriage to the right by reason of the engagement of said pinion 39 with the rack 40 on the carriage. The clutch section 63 has a peripheral groove 66 therein in which a pin 67 is received. This pin, as shown in Fig. 1, is carried by a forwardly extending clutch shifting arm 68 carried by a rock shaft 69 mounted in bearings in the bracket 44. The connection between the arm 68 and the rock shaft 69 is preferably an adjustable one provided for by a split hub 70 held firmly in its adjusted position on the shaft by a screw 71.

The rock shaft 69 constitutes the main control shaft of the machine and is actuated in a manner which will hereinafter more clearly appear. From an inspection of Figs. 2 and 4 it will be seen that an arm 72 is adjustably secured to and projects forward from the rock shaft 69 and engages in a slot 73 in one arm of the angular lever 49 by which the clutch section 46 is controlled. It will be understood, therefore, that when the shaft 69 is rocked in one direction the clutch sections 63 and 46 will be simultaneously moved to releasing position, whereas when the shaft 69 is rocked in the opposite direction said clutch sections 'will be moved to simultaneously close both clutches. The effect of this construction is to release the train of connections including the driven shaft 43, worm 42 and worm wheel 41 from driving connection with the driving shaft 52, so that said parts remain quiescent except when the clutches are closed and at a time when the carriage is being returned to the right. It follows, therefore, that wear on this intermediate train of connections is reduced to a minimum and such noise as is incidental to the operation thereof is avoided during the ordinary use of the machine when the carriage return mechanism is not in operation. Moreover, it will be understood that when the clutches are open, the vertically disposed shaft 38 and its pinion 39, together with the clutch section 63 will be rotated freely while the remainder of the train of connections specified above will remain quiescent; the worm gear mechanism at this time being disconnected from the carriage as Well as from the driving shaft 52 and remaining disconnected until such time as the clutches are closed to return the carriage to the right.

Depending from the rock shaft 69 is a crank arm 74 adjustably secured to the shaft by split hub '75 on the arm held firmly on the shaft by a binding screw '76. The lower end of this arm is slotted to receive freely therethrough a forwardly extending rod or link 77 that carries a nut 78 on the threaded rear end portion thereof. When the rock shaft 69 is rocked to close both clutches 63. 61 and 46, 45, the arm 74 will coact with nut '78 to-shift the link '7'? forward. The front end of this link is pivoted to an arm 79 on the pivoted locking bar 14 so that when the link is shifted forward at the closing of the clutches the key levers 11 will be locked against effective depression thereby preventing an operation of the key levers during the time the clutches are closed and the carriage is being returned.

A coiled expansion spring 80 surrounds the rear end portion of the link 77, said spring hearing at one end against a head 81 on the rear end of the link and at its other end against the arm '74. The force of this spring tends to normally maintain the arm 74 and link '77 operatively connected to move together but permits the link to be moved forward against the force of said spring independently of the arm '74 when the tabulator is actuated and thus move the locking bar 14 to effective position, as will hereinafter appear.

I will now describe the automatically operating means controlled by the travel of the carriage for rocking the main control shaft 69, thus controlling the opening and closing of the clutches by which the motor is rendered effective to return the carriage and is rendered ineffective when the carriage has been returned.

As in Remington machines now in use the front cross bar 6 of the carriage carries an adjustable margin stop 82, as shown in Fig. 6. An arm 84 extends into the path of movement of the stop 83 and is carried by a rod 85 supported at one end for limited longitudinal movement in a bearing opening in a bracket 86 secured to the frame of the machine. The left-hand end of the rod 85 is pivotally connected to an upright arm 8'7 fixed near one end of the short rock shaft 88, as shown in Figs. 5 and 6. To the opposite end of this shaft is fixed a horizontal disposed arm 89. To this arm 89 is pivoted a depending rod 90, the lower end of which is pivoted at 91 to an angular lever 92 pivoted at 93 below the control box 94. The upright arm of this lever 92 is pivoted at 95 to a rod or link 96 that carries a hook-like end portion 97. This rod 96 is guided by a guide member 98 secured to the control box. The hook-like end of the member 96 is adapted to engage behind a pin 99 that projects laterally from a holding pawl 100 pivoted at 101 to the control box, and a contractile spring 102 is connected at one end to the pawl 100 and at its opposite end to the link 96. The upper free end portion of the pawl 100 has a hook-like engaging member 103 adapted to hook over the free end of an arm 104 secured to and projecting forward from the control shaft 69. A contractile spring 105 is connected at one end to the arm 104 and at its opposite end to a stud 106 on the control box.- The force of this spring is exerted to move the arm 104 upward thereby effecting a closing of the two clutches to render the carriage return mechanism effective. The arm 104, however, is held down in its lower position where the clutches are maintained released by the engagement of the pawl 100 with the free end of said arm, asthe parts are shown in Fig. 5. When. however, the carriage reaches the end of the line the stop 83 will engage the arm 84 and shift it until it coacts with the bracket 86. The effect of this movement of the arm 84 is to shift the rod 85 to the left, thereby moving the rod down through the intermediate connections and effect a releasing movement of the link 96 to the right, as the parts are shown in Fig. 5. The effect of this movement of the rod 96 is to withdraw the pawl 100 from engagement with the locked down arm 104 on the control shaft, thus freeing the arm for upward movement under the force of the spring 105, which is effective to close both of the clutches controlled by the control shaft. This results in automatically bringing about a return of the carriage to the right.

This movement of the carriage to the right will continue until the margin stop 82 coacts with an arm 107 carried by a longitudinally movable rod 108 supported at one end in a bearing opening in the bracket 86. The opposite end of this rod 108 is pivotally connected to an angular lever 109, to the horizontally disposed arm of which there is connected a depending link 110. The lower end of this link 110 is pivoted at 111 to an angular lever 112 pivoted at 113 in the control box 94. The other arm of this angular lever is pivoted at 114 to a longitudinally movable bar 115 supported for sliding movement at its lefthand end, as the parts appear in Fig, 5, by a pin 116 that is received in a slot 117 in said bar. The lower edge of the bar is provided with a cam face 118 that coacts with an anti-friction roller 119 carried by the arm 104. A contractile returning spring 120 is secured at one end to a pin 121 on the control box and at its other end to the angular lever 112. The effect of moving the rod 108 to the right through the coaction of the margin stop 82 with the arm 107 is to elevate the connecting rod-110 thus effecting a downward longitudinal movement of the bar 115 from the position shown in Fig. 5. This results in bringing the cam 118 into cooperation with the antifriction roller 119, thus depressing the arm 104 to a position where the retaining pawl 100 coacts therewith to lock the arm in its depressed position. A pin 115 carried by the bar 115 un derlies the rod 96 and supports it against the force of the spring 102. When the bar 115 is moved down in the manner described this results in lowering the free end of the rod 96 and permits it to trip out of engagement with the pin 99. The rocking of the arm 104 in the manner described is effective to rock the control shaft 69 in an anti-clockwise direction as the parts appear in Fig. 4, thus lowering the arms 72 and 68 with the result that the corresponding clutches will be opened, freeing the carriage from control of the motor. The parts of the control mechanism just described are substantially like those ordinarily employed in the Remington machines. However, the manner of releasing the drivingmechanism from a constantly driven motor with the aid of two clutches, the employment of the worm gearing, etc., all constitute novel features of the present invention.

As disclosed in my Patent No. 1,567,590 it was customary in the use of the stop and start, alternating current, motor for the carriage return mechanism of the Remington machines, to employ a carriage retarder or governor that functioned with greater retarding efiect during the return of the carriage than during a tabulating operation thereof. In the construction of the present invention this carriage retarding mechanism may be employed for retarding the run of the carriage under the tabulating operation in the usual manner, and is disclosed in a general way in the accompanying drawings, as will presently appear. However, the connections by which the carriage retarding mechanism is rendered effective by an actuation of the carriage return mechanism is eliminated in the present construction, there being no necessity for using it as the direct motor control of the carriage in the present instance sumces. The carriage retarding mechanism will not be described in detail, but it is shown in part in the accompanying drawings and such parts will be briefly referred to.

The pinion 39 by which a return of the carriage is efiected meshes with a gear 122 mounted on the top plate, as shown in Fig. 2. This gear wheel in turn meshes with a pinion 123' by which the pistons are actuated in a double cylinder shown in dotted lines in Fig. 1, and indicated as a whole by the reference numeral 124. That is tosay, such an actuation of the pistons will be rendered effective from the pinion 123 when a clutch contained within the housing 125 is closed. In the present construction there is no connection whatever between the-carriage return mechanism for closing this clutch Within the housing 125, so that the pinion 123 and gear 122 run free independently of the carriage retardingmechanism during the return of the carriage by its automatically controlled carriage return mechanism.

In addition to the means for automatically returning the carriage in the manner hereinbefore indicated, there is provided the usual carriage return finger key 126 carried by a lever 127 mounted on the same pivotal center 93 on which the lever 92 is mounted. The lever 127 is provided with a laterally projecting pin 128 which coacts with an arm 129 on the lever 92, so that a depression of the carriage release key'126 is effective to move the lever 92 in. a clockwise direction, as the parts are shown in Fig. 5, thereby releasing the holding pawl 100 and bringing about a closing of the clutches to effect a carriage return in the same manner as the automatically controlled means release the holding pawl 100, as hereinbefore described. It will be understood, therefore, that the operator may with the aid of the release key 126 return the carriage by the power actuated means from any point in th travel of the carriage.

I will now describe the means whereby an actuation of the tabulator mechanism is effective to bring about a release of the clutches in the event that the power actuated carriage return mechanism is in operation at the time when a tabulator key is operated, and by which at the same time the key levers 11 are automatically locked against effective actuation.

The universal bar 35, hereinbefore referred to, constitutes a part of a frame 130 pivoted at 131 to the tabulator frame 16 and provided with a forwardly extending arm 132. The forward end of this arm is provided with a laterally projecting headed pin 133 that extends through a key hole slot 134 in an upright link 135. The lower end of this link is pivoted at 136 to a rearwardly extending arm 137 carried by a rock shaft 138 mounted in the base of the machine. This rock shaft constitutes an auxiliary control or releasing shaft and is provided with a second crank arm 139 that carries a laterally projecting pin 140 received in the bifurcated end 141 of one arm 142 of an angular lever secured to a shaft 143. Projecting upward from the angular lever is a second arm 144 extending laterally and bifurcated at its upper end, as indicated at 145, where it receives the link 77 that is provided with a nut 146 in front of said bifurcated portion of the arm 144. It will be understood, therefore, that when the control shaft 138 is rocked through an operation of the universal bar 35, the effect is to lower the arm 139, thereby shifting the upper end of the arm 144 forward. This transmits a forward movement to the link'77 which is effective to move the locking bar 14 to effective position, thus bringing about a locking of all of the type action key levers 11 at the time that any tabulator key is operated. It will be observed that at this time the forward motion transmitted to the link 77 is against the force of the coil spring 80, the link at this time moving forward independently of the crank arm 74 on the control shaft 69.

The rock shaft 138 also is provided with a crank arm 147 to which the lower end of a link 148 is pivoted at 149. The upper end of this link is pivoted at 150 to a member 151 which is adjustably connected with a rack releasing member 152, A lifting shoe 153 carried by this rack releasing member underlies the feed rack 36. It will be understood, therefore, that when a tabulator key is actuated, the universal bar 35 in effecting a rocking motion of the shaft 138 pulls down on the link 148 and effects an operation of the rack releasing device 152 to the Fig. 4 position, thereby elevating the feed rack 36 and disconnecting it from the feed pinion 37. The effect of this of course is to release the carriage from the control of the escapement mechanism and bring the carriage within the control of the forwardly projected denominational stop 19 by which the carriage is arrested.

The upright link 148 also is provided .with a contact device 154 adjustably secured thereto by screw and slot connections 155, 156. This contact device at its upper end is provided with an off-set arm 161 that projects laterally therefrom over the crank arm 68, as shown in Figs. 1, 2 and 4. If, therefore, the clutches which connect the carriage return mechanism to the motor should be closed at the time when a tabulator key is depressed, the down motion of the link 148 will cause the arm 68 to be carried down. This results in directly releasing the clutch member 63 from the companion clutch teeth 61, and by rocking the control shaft 69 also will result in moving the arm '72 down to effect a release of the clutch member 46 from its companion clutch member 45. If, therefore, the operator should inadvertently depress a. tabulator key while the carriage is being returned to the right with the aid of its power actuated return mechanism, both clutches will be instantly released and a tabulating operation may be completed without interference from the carriage return mechanism.

In practice I prefer to provide adjustable means for connecting each of the arms 137, 139 and 147 to the control shaft 138, in order that the parts may be accurately positioned to bring about the functions which are determined through an operation of these arms. From an inspection of Figs. 3 and 7 it will be understood that the shaft 138 on which the arms in question are mounted is slotted longitudinally at 157 beneath the hub 158 of each of said arms. The slot 157 in each instance is of V-shaped formation and each hub 158 is tapped to receive two screws 159, 160. Each of these screws is conical at its end and coacts only with one side wall of the companion V- shaped slot in the shaft 138. By backing up one screw and turning in the other the companion crank arm may be adjusted in one direction or the other around the axial center of the shaft 138, the screws nevertheless firmly connecting the associated arm with the shaft.

By the present construction I am enabled to dispense with the use of a dash pot and speed governor to function during the returnof the carriage. I also am enabled to employ an induction motor with a materially lower speed of operation with materially advantageous results, since the constantly running motor and the constantly maintained uniform speed of the induction motor prevents the speed of the carriage from being accelerated or varied due to the variations in the extent of travel of the carriage. It also provides a smooth running constantly maintained speed of the carriage which is determined alone by the speed of the motor and is not subject to changes ordinarily incident to the use of a stop and start motor construction such for example as is disclosed in my hereinbefore mentioned patent and such as has been employed in Remington machines heretofore. Moreover, I am enabled to employ the same constantly running motor that is used to actuate the typewriting and computing mechanism for returning the carriage, as is disclosed in my hereinbefore mentioned application. Furthermore, the relative arrangements and the positions of the horizontally disposed transversely arranged driving shafts 52 and 43 and the vertically disposed shaft 38 driven thereby through the intermediate worm gearing, readily accomodate themselves to the motor mounting and the effective driving by the same motor of other parts of the machine, as'shown in my said hereinbefore mentioned application.

Various changes may be made in the construction, and certain features thereof may be employed without others, without departing from my invention as it is'deflned in the accompanying claims.

What I claim as new and desire to secure Letters Patent is:

1. In a typewriting machine the combination of a carriage, and power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage.

2. In a typewriting machine the combination of a carriage, and power actuated carriage return mechanism therefor including a continuously running motor, a worm adapted to be driven by said motor, a clutch intermediate said motor and worm, a worm wheel constantly in mesh with said worm, driving connections intermediate said worm wheel and the carriage including a clutch, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said worm and worm wheel remain at rest free from driving connection with both the motor and carriage.

3. In a typewriting machine the combination of a carriage, and power actuated carriage return mechanism therefor including a continuously running motor, a substantially horizontally disposed driving shaft adapted to be driven by said motor, a clutch intermediate the motor and said driving shaft, a worm on said driving shaft, a vertically disposed driven shaft, a worm wheel on said driven shaft constantly in mesh with said worm, connections between said worm wheel and the carriage including a clutch, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said driving shaft, worm and worm wheel will remain at rest free from driving connection with both the motor and the carriage.

4. In a typewriting machine the combination of a carriage, and power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage, and automatically operating means actuated to shift said clutch controlling means to close the clutches when the carriage reaches the end of a line and for automatically opening said clutches when the carriage has been returned.

5. In a typewriting machine the combination of a carriage, and power actuated carriage return mechanism therefor including a continuously wheel remain at rest free from driving connection with both the motor and carriage, and automatically operating means actuated to shift said clutch controlling means to close both of the clutches when the carriage reaches the endof a line and for automatically opening both of said clutches when the carriage has been returned.

6. In a typewriting machine the combination of a carriage, and power actuated carriage return mechanism therefor including a continuously running motor, a substantially horizontally disposed driving shaft adapted to be driven by said motor, a clutch intermediate the motor and said driving shaft, a worm on said 'driving shaft, a vertically disposed driven shaft, a worm wheel on said driven shaft constantly in mesh with said worm, connections between said worm wheel and the carriage including a clutch, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said driving shaft, worm and worm wheel will remain at rest free from driving connection with both the motor and the carriage, and automatically operating means actuated to shift said clutch controlling means to close both of the clutches when the carriage reaches the end of a line and for automatically opening said clutches when the carriage has been returned.

7. In a typewriting machine the combination of a carriage; power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between saidmotor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving. connection with both the motor and carriage; tabulator mechanism; and means controlled by an operation of the tabulator mechanism for actuating said clutch controlling means to open both clutches. 8. In a typewriting machine the combination of a carriage; power actuated carriage return mechanism therefor including a continuously rimning motor, a worm adapted to be driven by said motor, a clutch intermediate said motor and worm, a worm wheel constantly in mesh with said worm, driving connections intermediate said worm wheel and the carriage including a clutch, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said worm and worm wheel remain at rest free from driving connection with both the motor and carriage; tabulator mechanism; and means controlled by an operation of the tabulator mechanism for actuating said clutch controlling means to open both clutches.

9. .In a typewriting machine the combination of a carriage; power actuated carriage return mechanism therefor including a continuously running motor, a substantially horizontally disposed driving shaft adapted to be driven by said motor, a clutch intermediate the motor and said driving shaft, a worm on said driving shaft, a vertically disposed driven shaft, a worm wheel on said driven shaft constantly in mesh with said worm, connections between said worm wheel and the carriage including a clutch, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the nections between said motor and the'carriage,

a clutch. intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, clutch controlling means for simultaneously opening and closing both of said clutches, wherebywhen the clutches are open said geared connections remain at rest free from driving connection with both the motor and'carriage, and automatically operating means actuated to shift said clutch controlling means to close the clutches when the carriage reaches the end of a line and for automatically opening said clutches when the carriage has been returned; tabulator mechanism; and means controlled by an operation of the tabulator mechanism for actuating said clutch controlling means to open both clutches.

11. In a typewriting machine the combination of a carriage; power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage; keys; and automatically operating means for locking said keys against effective depression when said clutch controlling means are actuated to close said clutches.

12. In a typewriting machine the combination of a, carriage; power actuated carriage return mechanism therefor including a continuously running motor, a worm adapted to be driven by said motor, a clutch intermediate said motor and worm, a Worm wheel constantly in mesh with said worm, driving connections intermediate said worm wheel and the carriage including a clutch, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said worm and worm wheel remain at rest free from driving connection with both the motor and carriage; keys, and automatically operating means for locking said keys against effective depression when said clutch controlling means are actuated to close said clutches.

13. In a typewriting machine the combination of a carriage and power actuated carriage return mechanism therefor including a continuously running motor, a substantially horizontally disposed driving shaft adapted to be driven by said motor, a clutch intermediate the motor and said driving shaft, a worm on said driving shaft, a

vertically disposed driven shaft, a worm wheel on said driven shaft constantly in mesh with said worm, connections between said worm wheel and the carriage including a clutch, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said driving shaft, worm and worm wheel will remain at rest free from driving connection with both the motor and the carriage; keys; and automatically operating means for locking said keys against effective depression when said clutch controlling means are actuated to close said clutches.

14. In a typewriting machine the combination of a carriage; power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving con nections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage, and automatically operating means actuated to shift said clutch controlling means to close the clutches when the carriage reaches-the end of a line and for automatically opening said clutches when the carriage has been returned; keys; and automatically operating means for locking said keys against effective depression when said clutch controlling means are actuated to close said clutches.

15. In a typewriting machine the combination of a carriage, a continuously running motor driven shaft carried by the frame of the machine, a main driving shaft, a clutch intermediate said motor driven shaft and said driving shaft, a worm fixed to said driving shaft, a worm wheel constantly meshing with said worm, a driven shaft on which said worm wheel is loosely mounted, a clutch for connecting said worm wheel and driven shaft to turn together or to free the driven shaft for independent turning movement, a geared connection between said driven shaft and the carriage, and clutch controlling means for simultaneously opening and. closing both of said clutches.

16. In a typewriting machine the combination of a carriage, a horizontally disposed continuously running motor driven shaft carried by the frame of the machine, a horizontally disposed main driving shaft, a clutch intermediate said motor driven shaft and said driving shaft, a worm fixed to said driving shaft, a worm wheel constantly meshing with said worm, a vertically disposed driven shaft on which said worm wheel is loosely mounted, a clutch for connecting said worm wheel and driven shaft to turn together or to free the driven shaft for independent turning movement, a geared connection between said driven shaft and the carriage, a clutch controlling means for simultaneously opening and closing both of said clutches, and automatically operating means controlled by the travel of the carriage for shifting said clutch controlling means to control both of said clutches.

17. In a typewriting machine the combination of a carriage; and power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage, said clutch controlling means comprising a rock shaft, intermediate connections between said rock shaft and each of said clutches, and automatically operating means controlled bythe travel of the carriage for rocking said rock shaft in one direction to close both clutches when the carriage reaches the end of a line and for rocking said rock shaft in the opposite direction to open both of said clutches when the carriage reaches the beginning of the line position.

18. In a typewriting machine the combination of a carriage; and power actuated carriage return mechanism therefor including a continuously running motor, a worm adapted to be driven by said motor, a clutch intermediate said motor and worm, a Worm wheel constantly in mesh with said worm, driving connections intermediate said worm wheel and the carriage including a clutch, and clutch controlling means for simultaneously opening and closing said clutches, whereby when the clutches are open said worm and worm wheel remain at rest free from driving connection with both the motor and carriage, said clutch controlling means comprising a rock shaft, intermediate connections between said rock shaft and each of said clutches, and automatically operating means controlled by the travel of the carriage for rocking said rock shaft in one direction to close both clutches when the carriage reaches the end of a line and for rocking said rock shaft in the opposite direction to open both of said clutches when the carriage reaches the beginning of the line position.

19. In a typewriting machine the combination of a carriage; and power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, and clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage,

said clutch controlling means comprising a rock shaft, arms on said rock shaft, means for effecting a rotative adjustment of said arms to different set positions on said shaft, connections between said arms and said clutches, hand-controlled means for controlling the rocking of said shaft, and automatically operating means controlled by the travel of the carriage for rocking said rock shaft in one direction to close cloth clutches when the carriage reaches the end of a line and far rocking said rock shaft in the opposite direction to open both of said clutches when the carriage reaches the beginning of the line position. 1

20. In a typewriting machine the combination of a carriage; power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage; tabulator mechanism; and auxiliary releasing means controlled by an actuation of said tabulator mechanism for shifting said clutch controlling means to open both of said clutches.

21. In a typewriting machine the combination of a carriage; power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage; tabulator mechanism; auxiliary releasing means controlled byan actuation of said tabulator mechanism for shifting said clutch controlling means to open both of said clutches, said auxiliary releasing means comprising a rock shaft, a clutch releasing arm, and means for effecting a rotative adjustment of said arm on said rock shaft.

22. In a typewriting machine the combination of a carriage; and power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage; tabulator mechanism; auxiliary releasing means controlled by an actuationof said tabulator mechanism for shifting said clutch controlling means to open both of said clutches; type action key levers; locking means therefor; and means controlled by said auxiliary releasing means for rendering said locking means effective.

23. The combination of a carriage; power actuated carriage return mechanism therefor including a continuously running motor, intermediate geared driving connections between said motor and the carriage, a clutch intermediate said motor and geared connections, a second clutch between said geared connections and the carriage, clutch controlling means for simultaneously opening and closing both of said clutches, whereby when the clutches are open said geared connections remain at rest free from driving connection with both the motor and carriage; tabulator mechanism, auxiliary releasing means controlled by an actuation of said tabulator mechanism for shifting said clutch controlling means to open both of said clutches; type action key levers; locking means therefor; and means controlled by said auxiliary releasing means for rendering said locking means effective, said auxiliary releasing means comprising a rock shaft, an arm on said rock shaft for controlling the clutch releasing means, means for effecting a rotative adjustment of said arm to different set positions on said shaft, a second lock-controlling arm on said shaft, and means for effecting a rotative adjustment of the lockcontrolling arm to different set positions on said shaft.

FREDERICK A. HART.

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