US1050548A - Tabulating mechanism for type-writing machines. - Google Patents

Description

0. C. KAVLE. TABULATING MBGHANLSM PoR TYPE WRITING MACHINES.

APPLICATION FILED JUNE 4, 1909.

Patented Jan. 14, 1913.

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0. C. KAVLE.

TABULATING MECHANISM Pon TYPE WRITING MACHINES.

APPLICATION, FILED JUNE4, .1909. i 1,050,548. Patented Jan. 14,1913.

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TABULATING MBCHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED JUNE 4, 1909.

1,050,548. l Patented Jan. 14, 1913.

3 SHEETS-SHEET 3.

To all whom't may concern:

UNITED sTATEs PATENT oEEIoE.

OSCAR c.. KAVLE, oF SYRACUSE, NEW YORK, AssIGNoR To HARVEY A. MOYER, 0F

sYRAcUsE, NEW YORK.

TABl'J'LA'IINGV MECHANISM FOB.y TYPE-WRITIG MAGI-IIN ES.

Specification of Letters Patent.

Patent-ed Jan. 14., 1913.

Application iledrJ'une 4, 1909. Serial No. 500,165.

Be it known that I, OSCAR O. KAvLE, a. citizen of the United States, residing at Syracuse, in the county of Onondaga and State of New York, have invented a' new and useful Improvement in Tabulating Mechanisms for Type-VVriting Machines, of Which the following is a specification.

This invention enabling the carriage to be quickly moved -to different desired positions to produce writing machines of ordinary construction'` without interfering` with their ordinary use; that can be operated by simply depressing a tabulating. key and without requiring the key to be held down; also to provide a device of novel construction for absorbingr the shock incident to stopping the carriage; and also to improve'tabulating mechanisms in"the respects hereinafter described and set forth in the claims.

In the accompanying drawings, consist.,- ing of three sheets: Figure 1 is a fragmentary rear elevation of a typewriting machine provided with tabulating mechanism embodying the invention. Fig. 2 is a.' plan view thereof. Figs. 3 and 4 are similar fragmentary rear elevations thereof, partly in section, showing two different positions of the parts. Fig. 5 is a longitudinal s ectional elevation thereof, on an enlarged scale, in line 5 5, 3. Fig. 6 is a fragmentary perspective view thereof. Fig. 7 is a longitudinal sectional elevation thereof in line 7-7, Fig; l. Fig. 8 is a cross scction, on an enlarged scale, of the shock abL sorbcr. F ig. 9 is an elevation of the'valve of the shock absorber.

Like reference characters refer to like parts 'in the several figures. The invention is shown in the drawings applied to a front strike machine in which the'platen is shiftable vertically for printrelates to tabulating. mechanisms for typewritmg machines .for

by the usual spring motor or other meansl (not shown), and which is pivoted at d d at the upper rear portionv ofthe main frame to swing vertically for shifting the platen.

E represents the escapement Wheel of the mechanism which governs the letter space movements of the carriage. This escapement wheel is secured to the rear end of a shaft which is journaled in a bearing e on the shift frame and is provided at its Afront end with a pinion e that meshes with a rack bar F on the carria e. secured to or forme with a rod f which is secured at its ends to the rear' ends of carriage release levers f fulcrumed at f2 on the ends of the carriage. Springs (not shown) act to hold the rack bar vin operative engagement with the escapcment pinion e2 except when the rack bar is purposely raised by actuating either of the levers f', or a tabulating key to release the carriage/from the cscapement. The parts as thus far described may be of known or any suitable construction. f

Theirregular movements of the 'carriage necessary for producing tabulated work are effected by releasing the carriage from the escapemcnt and arresting the motion of the carriage by the driving spring drum or motor at the desired points by a stop device which is caused tof' intercept coperating ad. justable stops provided on the carriage. For` clearness of description, the stops on the carriage will be hereinafter referred to as carriage stops and the coperating stop device as the stop. G represents the carriage. stops, of which any desired number, one or more, maybe adjustably mounted Aon the carriage in any' suitable way. Each stop shown has a'spring clip g which embraces the upperedge of the rack bar andfdetachably retains the `sto thereon with a tooth on the stop in engag ment with a serrated'rear face g onan upwardly and rearwardly extending portion of the r'ack bar to prevent the stop from shifting onv the rack bar. T he front end of the The rack bar F is spring clip g forms an index which coper. 110

.intercepting stops which normally stand l `shift frame D, and both stops H and Hvare pivoted at their lower ends to the free ends' out of en side by side below the path of movement of the sto s G, as shown in Fig. 1, and are adapte to be raised to a position. to intercept the carriage stops to arrest the carriage. The main stop H is pivoted between its ends to the free ends of links lz. It which are pivoted at thei outer ends to a lug h2 on the of links h3 which are pivoted at their other ends to the piston rod or movable art of a dash pot or shock-absorber, hereina ter described. These links constitute a movable or floating support for the intercepting stops which enables the several movements of the stops hereinafter described. The link h preferably has a rigid lifting linger h4 which projects therefrom beneath the ledge g3 of the rack bar for lifting the rack bar agement with the escapement pinion e w en using the tabulating mechanism.

H2 represents a lug on the shift frame Whichserves to limit the movement of the stops H and H by the carriage and form a back stop or abutment therefor.

The actuatin mechanism for the stops H H is preferab y constructed as follows: I represents a rock shaft suitably journaled on the shift frame in rear of the stops H H and provided with a rigid arm z' which projects forwardly under the upper stop-supporting links\ It. When the shaft I is rocked, this arm z' raises the links and places the upper ends of the stops H H in position to intereept the carriage stops G, and the lifting finger It* on the link /L engages the `ledge g3 f the rack bar' and lifts the rack bar out of engagement with the pinion e to free the carriage from the escapement. The partsl will then be in the position shown in Figs. E and The rockshaft l provided near its outer end with an arm 2". Figs. l, 2 and 7, connected by a link e' 1o a lever 2'3 lwhich is pivoted on the top plate of the main frame and is connected h): a rod z" to a tabulator key lever li :chich is t'ulerumed on the main frame and extends forwardly to the key-board. A suitable spring 7c, Fig. l, is provided for returning the rock shaft to the normal position, after actuation. The link i2 is so arrangedthat in the normal H into intercepting position could be em-y ployed.

L, Figs. 1 and 3-6, represents a spring which connects the auxiliary stop H to one of the links lr2 and holds the upper end of said stop against a stationary pin l projecting from a suitable part of the shift frame 'through an opening Z in the main stop, so that when the stops H H are raised by depressing the tabulator key, a shoulder l2 on the auxiliary stop will snap over the pin l and hold the stops up in the intereepting position until released by the engagement of the carriagestop with the auxilia stop H', without requiring the tabulatorlgey to be held down until the carriage is stopped. M represents a spring connecting the u per stop-supporting links It /L with a stud m projecting from the shift frame for lowering the stops H H out of engagement with the carriage stop after arresting the car-4 riage.

N represents the cylinder of the dash-p0t or shock absorber, and n t-h piston thereof. The cylinder is preferably made integral with the shift frame and has a screw head provided Awith a stuffing box n through which extends the piston rod n2 to which the lower-supporting links h3 for the stops H H are pivoted. The piston closel fits the cylinder and has .a number of ho es n through it, and is provided at one side with a valve or disk n* which has a limited movement toward and from the latter. The valve is of smaller diameter than the piston and has a single hole n which is kept in register with one of the holes in the piston by a pin n projecting from the iston through a holeY in the valve. The cy inder isl filled with oil. When the carria stop strikes the main stop H it will swing the latter about its pivotal connection with the upper-supporting links k h to the position shown in Fig. 4. and move the piston n inwardly. The oil will pass freely through the several holes n3 of the piston and offer only slight resistance to the first portion of the movement of the piston, but the valve will then be seated against the piston by the pressure of the oil thereon and close all of the holes except that registering with the hole a5 in the valve, thereby materially increasing the resistance and checking themetion of the piston and the main stop H. A

spring O surrounding the piston rod re-l ystop G by the spring M. In the return movement of the pistonv the valve n* uncovers the holes in the piston and permits a rapid motion thereof. The dash-pot could be constructed in other Ways and 'ettect the described action of the piston, starting rapidly, then retarding in its movement in one direction andreturning rapidly.

The operation of the tabulating mechanism'is as follows: The carriage stop or stops G is or are adjusted to stop the carriage at the desired point'or points. The

tabulating keyK is then rdepressed, which raises the stops H and H" in position to intercept the carriage stop, and releases the carriage from the escapement in the manner stated, and the auxiliary stop H catches on the pin Z and holds thestops up, permitting the tabulating key to be released. The parts are then in the position shown in Figs. 3 and 5. The carriage is then moved by its driving' spring or motor to the left (to the right. in the rear views ofFigs. 1-4)until the carriage stop G strikes the main stop l-l. The momentum of the carriage swings the stop to the position shown in Fig. 4 and forces-thc piston inwardly in the dash-pot, the described action ofthe dash-pot causing the carriage to be brought to a stop gradually, or without shock. Just before rthe main stop ll is moved into contact with the back stop ll2 the carriage stop (lr strikes the auxiliary' stop ll, which disengages it from4 the pin Z and permits thestops to be returned to their initial position b y the return springs M and t). The described action of the dash-pot permits the sto-ps to be rapidly restored to their normal position. The momentum of the carriage has been overcome and the carriage brought almostI to a standstill before the auxiliary stop H is thus released. The opening in thc main stop l-l through which' the latch pin Z for the auxiliary stop passes, is large enough Ato allow the several movements of the main stop, 2'.. e., upwardly, then laterally, next downwardly and finally back to the initial position, without interference with the pin. `The shock .absorber described will completely overcome the momentum of a Icarriage of ordinary weight., even when it is permittedto run the Lfull length of its travel, beforethe carriage forces the main lstop vH against 'the fixed abutment, H2, as shown in Figa', butthe continued. pull of the earriagejdriving spring on the carriage after the momentum of the lat-ter is overcome almost'. instantly moves the stop against the abutment. The abutment serves only to prevent over movement vto arresting the carriage is almost of the stops H and H under the action of the carriage driving spring after the momentum ofthe carriage is overcome by the dash-pot. The carriage is stopped dead, or without the least tendency to rebound, by the described mechanism, and the `usual noise and vibration of the machine incident eliminated.

I represents a hooleshaped arm on the `i inner end of the rock shaft I. Zhen the shaft is rocked and releases the rack bar F from the escapement pinion, the end of this arm' is. swung rearwardly between the teeth of the escapement wheel E, and moves the wheel backwardly about one-quarter of a tooth space and holds it there until the rack bar is again engaged with the pinion. This insures the proper meshing of the rack bar and pinion even if the rack bar returns 4before the main stop' 1s forced clear back against the back stop H2, and prevents theA carriage escapement from acting one letter space at the-time the rack loar rengages the pinion. l 5

The parts are so proportioned and arranged that the rackr bar F rengages the.

escapement pinion e before the main 4stop entirely l clears the carriage stop, thus restoring the carriage to the control of the cscapement before releasing it from the Vtabulating mechanism. In case a second carriage stop G is used wit-hin two or three letter spaces of the first one, it would belocated di rectly over the main sto H, when the carriage is arrestedby t e first stop G, and when the tabulating key is again depressed the main stop H will strike this second carriage stop-'G and raise the rackbar higher than usual, but when the carriage moves, the second carriage stop (l will slide downthe inclined end of the main stop H and engage .the auxiliary stop H', which will arrest the carriage in the proper position.' Thus two carriage stops Gr can be placed on the rack bar with but a single letter space between them, if so desired.

The action of the dash-pot described is different from the pneumatic devices heretofore employed, for the latter provide elastic cushions which increase the tendencyv ofthe carriage to rebound, whereas the former, while preventing shock, does not make an elastic cushion and the carriage has no tendency to rebound. The described mechanism is also entirely different in action from a friction governor, for it permits the carriage to travel at full speed as soon as i'eleased until the stops contact, and is free from the.wear .incident to frictional de`r vices.

The dash pot or shock absorber herein de-` scribed and containing .n .-uelastic liquid is radically different from an air lilled cylinder, and different means .are required' $95130 apply the two devices. An air filled cylinder answers to absorb the shock but it-has the fatal objection of increasing the reboundv of the carriage, while the liquid dash-poter device described absorbs the shock efficiently and entirely overcomes the tendency lof the carriage to rebound. l

A shock absorber operating as'described would also be desirable foruse in connection with the margin stops that limit the ex anism of different construction.

The shock absorbing means are also adapted to such machines as book ltypewriters which have a stationary platen and a lcarriage act-ing to move the printing mechanism over the paper, and to adding and calculating machines that move either th'e paper or printing mechanism by jumping over a considerable distance.

I claim as my invention: y

1. In a typewriting machine, the combination with a laterally movable carriage, and a support for the carriage, of a stop on one of said parts, a movable intercepting stop on the other part, an4 abutment for the intercepting stop, and a dash-pot which governs the movement of the intercepting stop from the intercepting positiontoward said abutment, substantially as set :foi-th.

2. In a typewriting machine, the combination with a laterally movable carriage, and a support for the carriage, of a stop on one of said parts, a movable intercepting lstop on the other part, and a dash-pot which governs the movement of said intercepting stop and has a valve which allows the movable part ofthe dash-pot to move in one direction with greater freedom than in the other. substantially as set forth.

3. In a tabulating mechanism for typewriting machines, the combination with a motor-driven carriage having a stop moving therewith, of a liquid dash-pot comprising relatively movable members, and an intercept-ing stop which is moved by the contact of the carriage stop therewith and acts on the dash-pot to graduallystop the carriageysubstantially as set forth.

- nati'on with a laterally movable carriage.

,and an escapement controlling the carriage,

of coperating stops. one vof which moves with the carriage, means for placing one of said stops in position to intercept the other and for releasing'the carriage from the eseaPement, one of said .stops being moved by contact with the other, and a liquid dashpot for resisting said movement of said stop,

Asubstantially as set forth.

-nation with a laterally movable carriage having a stop moving therewith, and a shift frame for the carriage, of a dash-pot supported b v the shift frame and moving therewith, and means by which the carriage stop acts on the dash-pot to stop the carriage with a retarding motion, substantially as set forth.

7. I n a typewriting machine, the combination with a laterally movable carriage having a stop moving therewith, and a shift frame for the carriage, of an intercepting stop on the shift frame which intercepts the carriage stop and is moved by contact there with, and a dash-pot on the shift frame and moving therewith which resists said movement of said intercepting stop, substantially as set fort-h.

8. In a typewriting machine, the combination with a laterally movable carriage having a stop moving therewith, andan escapement controlling the carriage, of an intercepting stop normally out' of line with the carriage stop, means for placing said intereeptingr stop in position to intercept the earriage'stop and for releasing the carriage from the escaIfment, means for automatically holding said. intercepting stop in intercepting position, said intercepting stop heing movable by contactwith the carriage stop, and a dash-pot for resisting the movement of said intercepting stop, substantially as set forth.

9. In a typewriting machine. the combination with a laterally moable carriage having a stop moving therewith, and an escapement controlling the carriage. of an intercepting stop normally out of line with the carriage stop, means for placing said g intercepting stop in position to intercept the carriage stop and for releasing the carriage 4. In a typewritmg machine. the combifrom the escapement, means for locking the escapement until the carriage is rengaged with the escapement, said intercepting stop being movable by contact with the carriage stop, and a dash-pot for resisting the movement of said intercepting stop, substantially as set forth.

. 10. In a typewriting machine, the combination with a laterally movable carriage having a stop moving therewith, a rack bar on the carriage, an eseapement mechanism having a pinion meshing with the rack bar, an intercepting stop movable transversely of the rack bar, and means for first moving the interceptingstop into line with the carriage stop and then moving both stops together with the rack bar to disengage the rack bar from the pinion, substantially as set iorth.

l1. In ay typewrit-ing machine, the combination with a laterally movable carriage having a movably mounted rack bar moving therewith, of a carriage stopv adjustably mounted on the rack bar, an intercepting stop normally out of line with the carriage stop, a pinion normally meshing' with the rack bar, an escapement wheel connected to the pinion, and means for first moving the intercepting stop into line withv the carriage stop, then moving both stops and the rack bar to disconnect the rack bar from the pinion, and at the same time locking the escapement wheel against rotary movement, substantially as set forth. 1Q. In a typewriting machine, the combination with a laterally movable carriage having a stop moving therewith, of main and auxiliary intercepting stogs arranged in parallel planes and normally out of line with the carriage stop, and means for simultaneously moving both of said intercept-ing stops into line with the carriage stop, substantially as set forth.

13. In a typewriting machine, the combination with a laterally movable carriage having a stop moving therewith, of main and auxiliary intercepting stops arranged in parallel planes one in advance of the other and both normally out of line with the earriage, stop, and means for pro]ectxng both of said stops simultaneously into line with the carriage stop, substantially as set forth.

la. In a typewritingmachine, the combi-v nation with a laterally movable carriage having a stop moving therewith, of main and auxiliar-y intercepting stops arranged one in advance of the other and both normally out of line with the carriage stop, means for moving said stops into line with the carriage stop, and means cooperating with said auX- iliary stop for holding said intereepting stops in intereepting' position until the carriage stop strikes said auxiliary stop, substantially as set forth.

15. In a. tyoewriting machine, the combination with a laterally movable carriage having a stop moving therewith, of main. and

auxiliary intercpting stops arranged one in advance of the other and both normally out of line with the carriage stop, meansfor moving said stops into line with the carriage stop, means cooperating with said auxiliary stop for holding said intercepting stops inv intercepting position until the carriage stop strikes said auxiliary stop, andl a dash-pot forv resisting movement of said main intercepting stop by the carriage stop, substantially as set forth. 1

16. In a typewriting machine, the combination with a laterally movable carriage having a stop moving therewith, of a movable intercepting stop, pivoted links supporting said Iintereepting stop and connected to the stop at different points, and means for moving said intercepting stop into position to intercept the `carriage stop, substantially as set forth.

17. In a typewriting machine, the combination with a laterally movable carriage having a stop moving therewith, of a movable intercepting stop, pivoted links supporting said intereepting stop and connected to the stop at dilterent points, means for moving said intercepting stop into position to intercept the carriage stop, and a shock absorber connected to one of said supporting links for resisting movement of said intercepting stop porting frame for the tloating stop, and

means for moving the floating stop into line with the carriage stop, substantially as set forth.

1S). In a typewriting machine, the combination with a laterally movable carriage having astop moving with the carriage, of a movably mounted intercepting stop normally oat of line with the carriage stop, means foumoving .the intercepting stop bodily into line with the carriage stop, said intercel'iting stop being also movable laterally with the carriage stop, means for limiting the lateral movement of the intercepting stop with the carriage stop, and means for moving` the intereepting stop out of engagement with the carriage stop and returning it laterally to the initial position, substantially as set forth,

`Witness my hand, this'27th day of May,

OSCAR C. KAVLE. 'itnesses i GERTRUDE Eiv'rz, FRANK E. REID.

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