US2216634A - Carriage return mechanism for com - Google Patents

Description

Oct. 1. 1940. o. J. SUNDSTRAND CARRIAGE RETURN MECHANISM, FOR COMPUTING AND PRINTING MACHINES Original Filed 'Dec. 18, 1931 7 Sheets-Sheet 1 INVENTOR OSCARJSUIYDSTRAND.

ATTORNEY CARRIAGE RETURN MECHANISM FOR COMPUTING AND PRINTING MACHINES w Oct. 1. 1940- o. J. SUNDSTRAND Original Filed Dec. 18, 1931 '7 Sheets-S heet 2 ATTORNEY Oct. 1. 1940. 'Q J SUNDSTRAND 2,216,634 CARRIAGE RETURN MECHANISM FOR COMPUTING AN]? PRINTING MACHINES Original Filed Dec. 18, 1931 V 7 Sheets-Sheet 3 INVENTOR OSCA/Fd Sl/l/DSTRA/VQ Piaf ATTORNEY r17- L g??? m,, 5 '3 I 6 H j w. I I w 7Z8 952 :2; nae 6/75 895 CARRIAGE CARRIAGE RETURN SHORT RETURN 5 was i (1/ .5'87 R4 ,J

% INVENTOR oscA/m su/vosmA/va 0a. 1. 1940 o. J. SUNDSTRAND 2, 16,6 4

CARRIAGE RETURN HECHANISM FOR COMPUTING AND PRINTING MACHINES Original Filed-Dec. 18-, 1931 7 Sheets-Sheet 4 1940- o. .L suNpsTRAND 2,216,634

CARRIAGE RETURN MECHANISM FOR COMPUTING AND PRINTING MACHINES v Original Filed Deb. 18, 1931 7 Sheets-Sheet 5 .//////I 7 I 8 7 6% F\\ e97 IIIIIH I w|||||||||||mu mix V mu nun |||||1| ATTORNEY CARRIAGE-RETURN IECHANISM FOR COMPUTING AND PRINTING MACHINES O. J. SUNDSTRAND 7 Sheets-Sheet 6 Original Filed Dec. 18, 1931 INVENTOR OSCARJSU/VDSTRA/YD. BY & I

' ATTO R N EY t. 1. 9 o. J. SUNDSTRAND 2,216,534

CARRIAGE RETURN MECHANISM FOR COMPUTING ,AND PRINTING MACHINES Original Filed Dec; 1'8, 1951 'r Sheets-Sheet 7 INVENTOR Q Q BY Patented Oct. 1, 1940 PATENT OFFICE CARRIAGE RETURN MECHANISM Fon COM- PUTING AND PRINTING MACHINES Oscar J. Sundstrand, Bridgeport, Conn., assignor to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Original application December 18, 1931, Serial No.

581,800. Divided and this application December 31, 1936, Serial No. 118,607

- 6 Claims.

This invention relates to bookkeeping machines, and more particularly to a carriage return mechanism therefor. This application is a division of my co-pending application Serial No.

581,800, filed December 18, 1931. a One of the objects of the present invention is to provide a highly efiicient carriage return mechanism, and one th is adapted for use in connection with bookkeeping work where it is 10 desired. at-Jgimes to vary the carriage return in respect to the columnar positions in which the return is begun and finished.

With these and incidental objects in view, the invention consists in certain novel features of construction and combinations of parts, the essential elements of which are set forth in appended claims, and a preferredembodiment of which is hereinafter described with reference to the drawings which accompany and form part of 25 Figure 3 is a detail view taken on the line 8-3 of Figure 2, and looking toward the rear of the- In the present machine, the power used in remachine,

Figure 4 is a back view of the machine, 30 Figure 5 is a plan view showing the connections from the carriage return keys and the motor bar to the carriagezdrive,

Figures 6 to 15 inclusive are details of the carriage return mechanism,

Figures 16 and 16*, when taken together, form a perspective view of the carriage return keys and the motor bar, and their connections with, the machine clutch and carriage return mechanism, and Figure 17 is a perspective view showing the 40 releasing mechanism for the latch that holds the carriage short return key in its depressed position.

General description 5 I The present mechanism is shown applied to a bookkeeping machine of the ten key type provided with a travelling carriage that is tabulated from one position to another throughout. its working stroke to provide for listing items in a 5-0 plurality of vertical columns on a work sheet. This necessitates a movement of the carriage from right to left, as viewed from the front of the machine, and thereafter a return movement from left to right. e 55 In certain types of work it is desirable not only to return the carriage from its extreme left hand position to its extreme right hand position, but to return it from one or more intermediate positions to the extreme right hand position, or even to return it'from one or more intermediate positions to another intermediate position. Such return to an intermediate position instead of to the extreme right hand position is commonly referred to as a short return or shuttle movemen The return mechanism for the present machine is provided with suitable controls to when the carriage is tabulated into a predeter- .mined position and to be discontinued when it has arrived in another predetermined position. Further controls are provided to cause the return mechanism to become eifective in any tab ular position of the carriage toreturn the car- I riage to its extreme right hand position upon depression of the key on the keyboard. There is b also provided an additional control to cause the return mechanism to become eflective at the will of the operator to return the carriage to an intermediate tabular position by depression of an- .other key on the keyboard.

Detailed description turning the carriage is derived from the same motor that is used to cyclethe machine. A spur gear wheel BIZ (Figures 2 and 3) driven continuously during the operation of the electric motor, meshes with a spur-gear wheel 885 having 'beveled gear teeth 886 on one side thereof that mesh with a beveled gear pinion 881, said pinion being fixed to a vertical shaft 888. A train of gears 889, 890, 89l and 892 (Figures 5 and 16*) transmits power from the shaft 888 to a. vertical shaft 893. A clutch collar 894 (see also Figures 6 to 10) is slidable but not rotatable on the shaft893 and is adapted to engage a clutch face 895 rigid with a pinion 888. Said pinion is loose on shaft 893 and meshes with a rack bar 881 attached to the carriage. A pin 893 (Figure 16) is secured in shaft 883 and extends into ,ia slot in the lower end of collar 894 to'provide the slidable and nonrotatable mounting of this collar on the shaft.

As is customary in machines of this character, a slippage is provided between the motorand the carriage to take the shock of starting the carriage and to prevent damage to the parts if the carriage clutch should not become disengaged when necessary. In the present mechanism this slippage is provided for by having the gear 890 (Figure 2) made of two part construction, the

two parts of the gear 890 until the inertia, of the carriage is sufficiently overcome.

Manual control of carriage return The means herein shown for throwing in the carriage return clutch manually at any tabularposition of the carriage includes a key 898 (Figures 1, 2, 5 and 16**) carried by a lever 899 pivoted in the machine frame at 900 (Figure 16). A spring 901 normally holds the key 898 elevated. The extent of downward and upward movement of such key is limited by engagement of lugs on the key lever 899 with the pivot shaft 101 (Figures 2 and 16 The rear end of the lever 899 is arranged to lift the clutch collar 894, the washer 902 being interposed between the lever and the clutch collar. The clutch collar 894 is held in engaged position by a lever 903 (Figures 6 and 9) pivoted on a stud 904. One arm of the lever 903 has a lug 905 that lies within a peripheral groove 906 on the clutch collar. A tooth 901 is formed on the opposite end of the lever 903. A detent 908 is pivoted in the machine frame at 909 and has a tooth 910 corresponding in shape to the tooth 901. A spring 9| I, acting on the detent 908, holds the clutch collar in either of its two positions, and insures quick engagement and disengagement of the clutch surfaces.

Disengagement of clutch In the return movement of the carriage, the lugs 615 (Figure 16) on the forward ends of the tabular stop bars 180 (Figure 1) successively pass over the upwardly extending arm of the lever 685, depressing the escapement tooth 668 on the right hand end thereof. As these stops 615 pass beyond the tooth 668 the latter springs back to its raised position where it lies in the path of these stops, a spring 614 being secured to the lever 665 for this purpose. vided with a cam bar 912 (Figure-l3) which, when the carriage approaches its initial position, engages an arm 913 formed on the lever 903, and

thereby tilts said lever against the influence of the detent 908 to withdraw the clutch collar 894 from the clutch face 895. After the clutch is thus disengaged, a spring drum 643 (Figure 4) connected to the carriage by a flexible cable 644, moves the carriageto the left Figure 16 a short distance, bringing the stop 615 for the first tabular position against the escapement tooth 668 to arrest the carriage in its right hand position.

Automatic engagement of carriage return clutch.

A bar 914 (Figures 6, 7, 9 and 10) is mounted on the carriage to extend longitudinally thereof. The bar is attached to the carriage by headed studs 915 fixed to the bar and extending through elongated openings 916 -in a member fixed to the carriage. A spring 911, attached to the bar 914 and to the carriage frame, normally holds the studs 915 against the left hand end walls of the openings 916, as shown in Figure 6. A pin 918 is mounted on bar '914 and is situated to engage the arm 913 as the carriage completes its working stroke to cause the carriage return clutch to be thrown in. The yieldable mounting of the bar 914 cushions the shock of engagement of the pin 918 with the arm 913.

When the carriage re-' turn is thrown in, slippage occurs between the The carriage is pro- Carriage short return The carriage short return key 919 (Figures 1 and 16 is carried by a lever 920 secured to the shaft 101. An arm 921 is secured to the left end of this shaft. A spring 922, attached to the lever 920 and to a rod 923, normally holds the key 919 elevated; the rod 923 serving as a stop to limit upward movement of the lever 920. When the key is in its upper position, the arm 921 rests against a pin 924 on a lever 925 loosely mounted on a shaft 834. A spring 926 tends to swing the lever 925 rearwardly but is normally restrained by the arm 921. The lower end of the lever 925 has a pin and slot connection with a slide 921, the rear end of which is supported upon a guide pin 928 (see also Figure 7). A vertical slot 929 is cut in the rear end of the slide 921 to accommodate one arm of the lever 908. Lever 903 (Figures 6 and 11) is slidable on its pivot 904, making it possible for the spring 926 (Figure 16 to slide the lever from its normal position, shown in Figures 7 and 9, to its rear position, shown in Figures 10 and 11, upon depression ofthe key 919. Such shifting of the lever 903 withdraws the arm 913 from the path a: (Figure 15) within which the clutch engaging pin 918 and the clutch disengaging cam 912 travel, and places said arm 913 in the path y. When in the path 11 the arm 913 will be engaged by the left hand end 930 of the bar 914, whereby the clutch will be thrown into effect return of the carriage. A pin 931 (Figure 14), moving with the carriage, engages the arm 913 in the return travel of the carriage to disengage the clutch.

The parts 930 and 931 may be located at, any desired points along the carriage so that they may initiate and interrupt movement of the carriage at any desired tabular positions. It will be understood that in both forward and rearward positions of the lever 903 the part 905 lies in the peripheral groove 906 of the clutch collar 894. At the time the short return key 919 is utilized, the carriage is standing in one of the tabular positions. The machine, therefore, must be cycled to effect tabulation of the carriage to cause the carriage to throw in the carriage return clutch-- in other words, to allow the part 930 (Figure 10) to engage the arm 913. This is accomplished by throwing out the detent 5115 (Figures 3 and 16 to allow the clutch elements 569 and 510 to engage one another and thereby cause a cycling of the machine. The means enabling depression of key 919 to throw out the detent 516 includes a pin 108 carried by an arm 101 loosely pivoted on shaft 101. A lever 109 is pivoted at 110, and has its upper arm lying beyond the pin 108. A bar 592 has an upstanding projection 11 1 situated in front of the lower arm of the lever 109 and extends to the front of the machine, where it is suspended on the lower arm of a lever 593 (Figure 16*) A bar 589 has a lug 590 secured to its side and lying in front of a shoulder 591. Depression of key 919, by this train of connections, moves bars 592 and 589 forward. Movement of the bar 589 forward, through the train of connections 588, 581, 586, 585 and 584 (Figures 16 and 16 causes a plate 581 to oscillate counter-clockwise about its pivot 582 against the tension of a spring 583. Since plate 581 and detent 516 are both secured to shaft 582, the movement of plate 581 will throw out the detent'516 to allow engagement of the clutch element 569 and 510 (Figure 3). The remaining details of the clutch mechanism, together with the now lies in the path of rod 329.

details of the carriage escape nent, do not form a part of the present invention and are, therefore,

omitted. The carriage tabulation that takes place toward the end of the ensuing cycle of the machine causes the lever 993 to be rotated counter-clockwise to engage the'carriage return clutch in the manner above explained.

Short return key latch;

immediately above the lever 933 to hold the key 9l9 depressed. In the last half of the machine cycle the key 919 is automatically unlatched by the latch "6 being moved forward against the tension of spring 111 by the following means.

A rock shaft l1 (Figure 1'1) is rocked first clockwise and then counter-clockwise during each cycle of the machine. An arm I69 is secured to the rock shaft and carries a roller 329. A lever 329 pivoted on a rod 329, engages roller 329 and carries a rod 329 at its upper end. Actuation of the rock shaft allows a suitable spring (not shown) to rock lever 329 counter-clockwise, the rock shaft then rocking lever 329 clockwise, moving rod 329 first rearwardly and then forwardly in the machine. A rod '12f has-pivoted thereon" an arm 129 having a laterally extending finger 123 adapted to'contact latch "6. A pawl H8 is pivoted to arm 129 at 1 I9 and has a notch 122 in its rear edge. When the machine is atrest, rod

329 lies in notch 122. During the first half of the machine cycle, rod 329 is moved to the rear,

whereupon pawl 1) drops until its lower edge l'he rear edge of pawl 1l8 During the last half of the'machinecycle, rod 329 is moved forward, moving pawl 1J8 forward and thereby causing finger 123 to move latch 1l6 forward and release the depressed key 9l9, spring 922 returning the key to its undepressed position. Continued forward movement of rod 329 to its home position causes pawl 1I8 to rock clockwise, through contact of its lower edge with rod 294, until notch 122 falls into contact with rod 329 thereby allowing arm 129 to move rearwardly a short distance. This allows latch 1I6 to be pulled to'the rear under the influence of spring 111. ,It now lies in its normal position shown in Figures 16 and 11 where it is effective as a latch for key 9! when the latter is depressed. A

Such unlatching of the short return key occurs at about the same time in the cycle that the rests on a rod 294.

carriage is released for tabulation. It is, therefore, necessary to provide some means to retain the arm 9l3 in the path 11 until the parts 939 and 93I exercise their control on the arm 913 to produce the short return movement. As shown in Figures 8 and 12, the arm of the lever 993 that is engaged by the detent 998 is'rabbeted to providetwo surfaces 934, thus producing locking shoulders 935 and 936. When the lever 993 is shifted to its rear position, the detent 999 springs into engagement with the lower surface 934 (as shown in Figure 8), whereby the detent lies in front of the locking shoulder 935 and holds the lever 993 in its rear position after the short return key 91.9

is released by the latch 1|6, the releasing of the key 9l9 causing a tensioning of av spring 931 (Figure .16) connected to lever 925 and to slide 921. The shoulder 935 thus retains the arm '9I3 in the path y long enoughv for the part 939 to reach and operate the arm 9l3'to throw in the carriage return clutch. The tilting of the lever 993, as the clutch is .thrown in, places the locking shoulder 936 behind the detent. 9l9, whereby the arm M3 is retained in the path y and the pin 93! can reach and operate the arm 9l3 to disengage the clutch (see Figure 14) As shown in'Figure 12,'

the shoulder 936 is a short distance behind the shoulder 935. When the clutch is thrown in and the shoulder 936 is placed behind the detent 9l9, the spring 931 (Figure 16), being at this time under tension, pulls the lever 993 forward until the shoulder 936 bears against the detent.9l9, this movement of the lever 993 being insuflicient to withdraw the arm 9| 3 from the path 1 When.

the clutch is disengaged by the pin 93], detent 919 is forced from the upper surface 934 to the lower surface 991, as will be understood from Figure 12, thereby permitting spring .931 to shift the lever 993 into its normal forwardposition.

Time switch and 'its control by carriage return and short returnfkeys In the circuit of the motor 26 is a switch (notshown) which is arranged. to be operated by means of a lever 596 (Figuresl and 5). Means is also provided for automatically opening the motor circuitafter the lapse of a brief period, say, one or two minutes, following the last-cycle of operations of the machine, so that in the event that the operator fails to open-the switch by means of the lever 596, the motor will be automatically stopped. This means comprisesa switch in series with the first mentioned switch and consists of contacts 591 and 598 (Figures 5 and 16?). The contact 598 is arranged to be withdrawn from the contact 591.

by means of a lever 599 pivoted at 699. Pivoted to the lever. 599 is a link 691. A cam 692 is fixed to a gear wheel 693 that meshes with a pinion 694. Fixed to thepinion 694 is a ratchet wheel 695 arranged to be turned by a dog 696. A spring 691 tends to move the dog 6.96 in the direction to turn the ratchet wheel 695. The diig is moved in the opposite direction by means 0 a link-698 (Figure 16) which connects said dog to the upper arm of a lever 699 pivoted on the axis 6| 9. The lower arm of the lever 699 is arranged to be engaged by a pin 6 (Figure 2) carried by a gear wheel 6| 2 rigid with the hub or tubular shaft 568 (Figure 3). The gear wheel H2 is driven continuously during the operation of the motor. It will be seen that the pin 6 69l tends to move said link in the directionato 'close the contacts. 591 and 598, and also holds the link 69l in position for actuation by the cam 692. 6 is a stop pin for the link 69I. On the lower side of the link 69! is a stud 6l5 arranged at times to bear against the periphery of the cam and at other times to rest on the upper side of the cam. On the upper side of the cam is a pin 6l6 adapted to engage the edge 6" of the link 69L The end of the link 6! is arranged to be engaged by a pin ("8 on the ratchet wheel 695. M9 is an anti-returndo for the ratchet wheel 696. 1

The link GM is arranged to be lift ed until the stud 6l5 is above the horizontal plane of the top of the cam 602, to allow the spring 6| 3 to move the link against the stop 6, and place the stud M5 on top of the cam. The means for lifting the link 6M comprises a slide 620 (Figure 2) the rear end of which extends through an opening 62l (Figure 3 in a plate 522 in the machine frame. The rear end of the slide underlies the link 60L On the rear end of the slide 620 is an inclined surface 623 that bears against the rear end wall of the opening 62L The front end of the slide 620 is pivoted at 624 to the lever 58L When the short return key 9|9 is depressed, the lever 58l swings counter-clockwise, as described above, pushing the slide 620 rearwardly and raising the link 6M so as to permit the spring 6|3 to place the link GUI against the stop pin 6M. The stud 6|5 then supports the link on top of the cam. The pin BIG is not of sumcient height to engage the link when the latter is thus supported. When the shoulder 625 of the cam revolves out from under the stud M5, the link 60l drops until it rests on top of the cam, the stud 6I5 being then alongside the low part of the periphery of the cam, and the free end of the link being at the right of the orbit of the pin 6l8 on the ratchet wheel. As thecam continues to revolve, the pin BIB engages the edge 6H of the link EDI and swings said link to the left, thus placing the free end of the link in the path of the pin (H8. When the pin H8 engages the link till, the latter is pushed rearwardly .to move the contact 599 away from the contact 591, and thus open the motor circuit.

From the description of the above parts, it is seen that if the machine has been left idle for a sufiicient length of time to allow the pin M8 to open the contacts 591 and 598, depression of the short return key 9I9, together with the accompanying counter-clockwise rotation of arm 58! (Figure 2.) causes the link 620- to be moved to the rear and the link 60! to be raised high enough for the forward end of the link to clear the pin 6l8, allowing the spring 6l3 to close the contacts 591 and 598 to start the machine.

A lever 695 (Figures 2, 5 and 16 is pivoted at 696 and has a laterally extending arm 69! underlying the carriage return key 898. A spring 90! holds the front end of the lever in its raised position. The rear end of the lever 695 has a lug 698 turned thereon and underlying the link 620. The provision of this mechanism enables a depression of the carriage return key 898 to pivot the link 620 about the connection 624, raising the rear end of the link sufiiciently to raise the forward end of link 60l above the pin SIB. 1 In this manner, a depression of the Carriage return key 898, as well as the Short return key '9l9, closes the motor circuit if it has been previously opened by the time switch.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form of embodiment herein disclosed for it is susceptible of embodiment in various forms' all coming within the scope of the claims which follow.

What is claimedis:

v 1. In a printing machine, the combination of laterally movable carriage, a set of maximumlimit stops on the carriage, a set of intermediatelimit stops on the carriage, said sets of stops being located in different planes, carriage-return mechanism including a clutch and a member adapted to engage and disengage the clutch, the member being movable into the plane of either set of limit stops, and manipulates means for adjusting the position of said member.

2. In a printing machine, the combination of a laterally movable carriage, a set of maximumlimit stops on the carriage, a set of intermediatelimit stops on the carriage, said sets of stops being located in different planes, carriage-return mechanism connectible with and disconnectible from the carriage, means movable into the plane of either set of limit stops for controlling the connection and disconnection of the carriage and the carriage return mechanism, manipulative means for adjusting the position of said controlling means, a latch to hold said manipulative means in operated position, means actuated in the cycling of the machine for moving the latch to release the'manipulative means, and means to hold the controlling means in adjusted position after said latch has been released and until one of said limit stops has operated said controlling means.

3. In a printing machine, the combination of a laterally movable carriage, a clutch member for driving the carriage in the .return direction, a lever connected to said clutch member to shift the same into and out of driving position, a pair of members carried by the carriage and arranged to engage an arm of said lever, one of said members engaging said arm to throw in the clutch and the other member engaging said arm to throw out the clutch, another pair of members on the carriage arranged to engage the last-mentioned arm of said lever to throw the clutch in and out, respectively, said pair of members traveling in a different path from that taken by the firstmentioned pair of members, said lever being shiftable into and out of either of said paths, and means for shifting the lever from one path to the other.

4. In a printing machine, the combination of a laterally movable carriage, a clutch memberv for driving, the carriage in the return direction, a lever connected to said clutch member to shift the same into and out of driving position, means carried by the carriage and arranged to engage said lever to throw the clutch in and out, other means on the carriage arranged to engage said lever to throw the clutch in and out, said other means traveling in a different path from that taken by the first-mentioned means, said lever being shiftable into and out of either of said paths, manually operable means for controlling shifting of the lever from one path to the other, a spring tending to shift the lever in the opposite direction, a latch to hold said manually operable means in operated position, means actuated in the cycling of the machine for releasing the latch, and means to hold said lever in adjusted position after said latch has been released and until the lever is operated to shift the clutch element.

5. In a machine of the class described, a laterally movable paper carriage, means to limit its travel in both directions, intermediate means to limit its travel in both directions, carriage return the carriage is traveling in either direction, and means for so moving said member.

6. In a machine of the class described, a laterally movable paper carriage, means to limit its travel in both directions, intermediate means to limit its travel in both directions, the two means being located in different planes, carriage return mechanism connectible to and disconnectible from the carriage, a controlling member for controlling the connection and disconnection of the carriage and the carriage return mechanism, the member being movable into the plane of either of said means to cooperate therewith when the carriage is traveling in either direction, and means to move the member into the plane 01 eitherof said means.

OSCAR J. SUNDS'I'RAND.

CERTIFICATE OF CORRECTION.

Patent No. 2,216, 65h. October 1, 191m.

OSCAR J. sunnsmm.

It is hereby certified that error appears in the printed speeificstion of the above numbered patent requiring correctionas follows: Page 14., sec-- 0nd column, line )4, claim}, for the word "manipulates" read -ma.n1pu1a tive--; and that the said Letters Patent shouid be read with this correction therein that the sememay conform to the recerd of the case 11; the I Patent Office.

Signed and sealed this 12th giay of November, A. D. 1914.0.

Henry Van Arsdaie, (Seal) Acting Commissioner of Patents.

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