US1945895A - Typewriting machine - Google Patents

Description

Feb. 6, 1934-. 4 I A, HART 1,945,895

TYPEWRITING MACHINE File d Nov. 16, 1931 v 'e Sheets- Sheet 1 WITNESSES INVENTOR Feb. 6, v F. A. HART f TYPEWRITING. MACHINE i Filed Nov. 16, 1951 6 Sheets-Sheet 2 Fig I I I 1 a l wit? 1 DQ Feb. 6, 1934. H T' 1,945,895

TYPEWRITING MACHINE I Filed Nov. '16, I931 e Shets-Sheet s WITNESSES I [1 ATTOR N EY Feb. 6, 1934.

F. A. HART v TYPEWRITING MACHINE Filed Nov. 16, 1931 6 Sheets-Sheet 4 INVENTOR- WITNESSES ATTORNEY .F 6, 1934- F. A. HART *TYPEWRITING MACHINE Filed Nov. ,16, 1931 6 Sheets-Sheet 5 -INVENTOB ATTORNEY F. A. HART TYPEWRITING MACHINE Filed NOV. 16, 1931 Feb. 6, 1934.

6 Sheets-Sheet 6 NQTM Q S. \Q.

-INVENTOR W 4/4449 Patented Feb. 6, 1934 UNITED STATES PATENT OFFICE TYPEWRITIN G MACHINE Application November 16, 1931 Serial No. 575,345

33 Claims.

My invention relates to typewriting, combined typewriting and computing and like machines and more particularly to power actuated tabulator mechanism therefor.

The main object of my invention, generally stated, is to provide highly efficient mechanism of the character specified. I

A further object of myinvention is to provide mechanism of thecharacter referred to whichmay be readily embodied in existing machines without modifying, or materially modifying, the existing structural features of such machines.

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 description and particularly pointed out in the appended claims.

In the accompanying drawings, wherein like reference characters indicate like parts in the different views Fig. 1 is a fragmentary, vertical, fore and aft sectional view showing a portion of the tabulator mechanism and some of the associated parts.

Fig. 2 is a fragmentary top plan view of the tabulator mechanism with some of the associated parts, a portion of the structure being sectioned away.

Fig. 3 is an enlarged detail, fragmentary horizontal sectional view of a portion of the same, the section being taken on the line 3-3 of Fig. 4 and looking in the direction of the arrows at said line.

Fig. 4 is an enlarged, detail, side elevation, with parts sectioned away, of a portion of the structure disclosed in Fig. 2, and as seen from the righthand side of the machine and with the parts in normal position.

Fig. 5 is a view that corresponds somewhat to Fig. 4 except that the parts are shown in the actuated position, as they appear when a tabulator key is held depressed.

Fig. 6 is a diagrammatic side view showing the driving connections between the motor and different parts actuated thereby.

Fig. '7 is a detail side view of one of the tabulator key levers and some of the parts controlled thereby.

Fig. 8 is an enlarged, detail, fragmentary, face view of the adjustable contact by which the arresting trips are actuated, together with some of the associated parts.

Fig. 9 is an enlarged detail sectional view taken on the line 9--9 of Fig. 5 and looking in the direction of the arrows at said line.

v I have shown my invention embodied in the present instance in Remington electrified bookkeeping machine, in 'which the devices of the present invention may be readily incorporated without modifying, or materially modifying, the existing structural features of said machine. It should be understood, however, that the invention is not restricted to embodiment in such machine, but may be incorporated in typewriting, computing and like machines generally, wherever found available.

The denominational tabulator mechanism disclosed in the present instance corresponds in part to that commonly employed in Remington machines. Thus, from an inspection of Fig. 1 it will be seen that the usual carriage, comprising end bars 1, a rear cross bar 2 and a front cross bar (not shown) supports a platen 3 and is mounted on crossed bearing rollers 4. at the front and rear of the carriage to travel from side-to-side of the machine. The carriage supports bracket arms 5 on which are fixed a column stop bar 6 having a series of column stops 7 mounted thereon. These stops 7, as shown in the present instance, are adapted to be moved fore and aft on the column stop bar into and out of effective position.

A series of denominational stops 8 are arranged at letter space intervals, each being carried by and projecting forward from a denominational stop lever 9, pivoted at 10 in a tabulator frame 11 fixed to the typewriter frame.

In the present instance each of these levers 9 terminates at its lower end in the rear of a slide 12 mounted on parallel supporting rods 13 for movement fore and aft of the machine and is guided in said movement by guide combs 14 that form part of a frame 15 by which the rods 13 I are supported.

In accordance with the present invention the slides 12 are operated by power actuated means, to be hereinafter described, and thus control the movements of the stops 8 to and from projected position, or into and out of the path of the effective column stops '7.

The movement of any stop 8 to effective position is operative to release the carriage from con-, trol of its escapement mechanism, so as to free the carriage for tabulating movement. In the present instance this is effected by a universal bar 16 carried by a frame pivoted at 17 to the tabulator frame 11 and provided with an arm 18. A pin 19 on the arm 18 coacts with a link 20 pivoted at its lower end, at 21, to a crank arm 22 on a rock shaft 23. Another crank arm 24 on this rock shaft is connected to an upright link 28, to a standard 29 on the top plate 30 of the machine. The releasing device is provided with a contact shoe 31 that underlies a feed rack 32 carried by the carriage in the usual manner and normally engaging a feed pinion 33 operatively connected with the escapement wheel.

An anti-clockwise movement of any lever 9 against the force of its returning spring 9 to project the corresponding stop 8 to effective position, results in rocking the universal bar 16 and transmitting an upward movement to the contact shoe 31, thereby disengaging the feed rack 32 from the feed pinion 33.

It will be understood, that so far as the power actuated mechanism of the present invention which is about to be described is concerned, it maybe employed to actuate any suitable tabulator mechanism although such power actuated mechanism was specially designed in'the present instance for cooperation with the existing tabulating mechanism shown, or so much of it as has thus far been described.

The actuating devices about to be described are supported by a separate auxiliary frame designated as a whole by the reference numeral 34 and which is detachably connected to the base section 35 of the mainframe of the machine by screws 36, so that said frame 34 and the parts carried thereby may be introduced into and removed from the machine as a single unit.

The auxiliary frame 34 supports a pivot rod 37 (see Fig. 4) on which are mounted a series of angular or bell crank levers or actuating device 38, equal in number to the slides 12 and the stop carrying levers 9 with which they coact. The levers 38 are guided by guide combs 39 and 39 supported by the auxiliary frame, and the upper rearwardly extending end of the upright arm of each lever'38 coacts with the forward end of the associated slide 12. The horizontally disposed arm of each lever 38 is connected to one end of a contractile returning spring40 anchored at its other end to a plate 41 secured to the auxiliary frame 34.

The upright arm of each lever 38 has pivoted thereto, at 42, a link, selective actuating device or interponent 43, that swings vertically and also moves bodily fore and aft of the machine in a slot in an upright guide comb 44. This guide comb is formed from the same piece as the guide comb 39 and is secured to the auxiliary frame 34. Cooperative with each interponent 43 is an underlying slide 45, each slide being guided for vertical movement at its upper end in a guide slot in the plate in which the guide combs 39 and 44 are formed, and at its lower end in a guide slot in the plate in which the guide comb 39 is formed. Each slide 45 is arranged directly beneath and coacts with the associated interponent 43 so that an elevation of a slide will result in swinging the forward end of the associated interponent upward around its pivot 42, from the Fig. 4 to the Fig. 5 position. This results in bringing the free end of the elevated interponent in the path of movement of a universal actuating member 46 adapted to receive a reciprocatory or oscillatory movement fore and aft of the machine and to coact with any of the interponents 43 when the latter are raised .into the path thereof.

The manner, in which the interponents 43 are selectively elevated into the path of the universal actuating member 46 will now be described.

receives its support on the base section 35 of Referring more especially'to Fig. 7, it will be understood thataseries of bell crank tabulator key levers 47 provided with tabulator keys 47 are pivotally supported on a pivot rod 47* that 0 8 the machine frame. The depending arm of each lever 47 is detachablypivoted, at 48, to a link 49 that extends fore and aft of the machine. It will be understood from a consideration of Fig. 2 that the forward end portions of the links 49 extend in converging vertical planes, whereas the rear end portions thereof are arranged in vertical parallel planes, where they are supported from beneath them by a supporting roller 50. This roller is provided with reduced ends 51 by which the roller is supported in bearings provided for by U-shaped bracket arms 52 formed on the same plate in which the guide comb 39 is cut. This plate has a right angle bend therein, in the. upright portion of which is provided a series of guide slots 53 (Fig. 7) each adapted to receive and guide the free end portion of one of the links 49.

Each link 49 at its rear end portion is arranged adjacent to its companion slide 45, and the latter carries an anti-friction roller 54 preferably supported on its slide by bearing balls 55 (see Figs. 3 and 7). Each roller 54 rests on the upper edges of its companion link 49 and is adapted to coact with a cam" thereon. Each cam comprises a low portion 56 on which the companion roller normally rests, an inclined face '57 by which the companion slide is elevated when the link moves rearward, and a dwell 58 on which the roller is-supported to hold the companion slide in its elevated position and resist any tendency of an actuated slide 45 to return to normal position until itscompanion link 49 moves forward to normal position. The return of each tabulator key lever 47 and its link 49 to normal position, when the depressed key is released by the operator, is effected by a contractile return spring 59 connected at one end to an upright arm 60 on the companion link 49 and anchored at the other end to an angle bar 61. One effect, therefore, of depressing a tabulator key is to elevate an interponent 43 into the path of movement of the actuating member 46 and to hold the interponent in such position as long as the key is held depressed by the operator.

The actuating member 46 is mounted and controlled in the manner now to be described.

The member 46 in addition to its cross bar which coacts with all of the interponents 43, has depending supporting arms 62 and 63 at the ends thereof. Each of these arms has a hub 64 pinned to a rock shaft 65 mounted to rock in hearings in the auxiliary frame 34. The left hand end of this shaft extends beyond said frame where it is provided with a crank arm 66 to which one endof a spring 67 is attached, the opposite end of the spring being anchored on a pin 68 projecting from the frame 34. The arm 62 carries an anti-friction roller 69 mounted on hearing rollers 70. 'I'hisroller 69-coacts with the periphery of 'a rotative cam '71 to control the back and forth movements of the actuating member 46, and through the key selected interponents 43, control the denominational tabulator stops 8.

The cam 71 is controlled at each actuation of 145 a tabulator key in the following manner:

The cam 71 is mounted and free to turn on hearing balls a (see Fig. 3) on a continuously running motor driven shaft 72. Adjacent to said cam and fixed to the shaft 72 is a locking wheel 150 73 notched at regular intervals, as indicated at 74. The cam 71 carries a latch 75 pivoted on one side thereof, as indicated at 76. The engaging nose 77 of this latch is adapted to be received in one or another of the notches 74 in the locking .wheel, and thus connect the cam 71 to revolve with the shaft 72. A spring 78 exerts its force on the latch 75 to bring about an engagement thereof with the locking wheel. However, when either of the trip devices 79 and 80 engages a projection 81 on the latch, as shown in Figs. 4 and 5, the latch is maintained in the disengaged position against the force of its spring 78, thus holding the cam against movement.

There are two high spots or portions 71 and 71 on the cam 71, and from a consideration of Figs. 4 and 5 it will be seen that the spring pressed roller 69 bears on the cam below the high portion 71 thereof when the latch is engaged by the trip 80, whereas the said roller bears below the high portion 71 on the cam when the latch is engaged by the trip 79. The effect of this construction is that the greater effective force of the spring 67 exerted on the roller 69 will counteract the reaction of the latch spring 78, which otherwise would tend to turn the cam 71 in a clockwise direction in Figs. 4 and 5 when the latch is held released by either of the trips 79 or 80.

The motor driven shaft 72 is preferably supported at its left-hand end on hearing balls b in one side of the base section 35 of the frame, as'

shown in Fig. 3. The shaft is supported intermediate its ends by bearing balls 0 in an arm 82 detachably secured by screws 83 to the auxiliary frame 34 and arranged in close proximity to the cam. The right-hand end of the shaft 72 is supported on a ball bearing (not shown) in the base section, such bearing corresponding to that indicated at the other end of the shaft. The lefthand end of the driving shaft 72, where it extends beyond the base, has a pinion 84 fixed thereon. From a consideration of Figs. 2, 3 and 6 it will be understood that the pinion 84 meshes with an idler 85 mounted on bearing balls d on 7. the base, and that this idler meshes with a gear 86 fixed on a shaft 87 that carries the usual motor driven snatch roll 88 by which the alphabet printing type bars (not shown) are actuated. From a consideration of Fig. 6 it will be understood that the right-hand end of the shaft 8'7 carries a pulley 89 by which the snatch roll is driven. A belt 90 drives the pulley 89 as well as other parts, and is driven by a pulley 91 on the shaft 92 of a continuously running electric motor 93.

I will now describe the means by which the trips 79 and 80 are controlled from the tabulator keys and control the revolution of the cam 71.

: thereto and that said hub receives a pivotal support on a headed pin or stub shaft 95. The reduced end 96 of this shaft is received in a bearing in the auxiliary frame 34 and. is held fixed in said bearing by a set screw 97. The rear end of the trip 80 is pivotally connected at 98 to an upwardly extending link 99 pivotally connected at 100 to the rear end portion of the trip 79. The two trips '79 and 80 are thus connected to move in unison; the trip 79 moving down into the path of the projection 81 on the latch 75 as the trip 80 moves out of the path thereof and vice versa.

The trip 80 is constructed and mounted like the trip 79, except that the latter is provided with a hook-like engaging projection 79 to engage the latch in its movement from right to'left, whereas the terminal end.of the trip 80 engages the trip in its movement from left to right. Therefore, the same reference numerals will be employed to designate corresponding parts of the two trips and their mounting means. trip '79 is connected to the upper end of a contractile spring 101, the lower end of the spring being anchored to the plate in which the guide comb 39 is formed. The force of this spring is exerted to normally hold the trip 79 out of the path of the latch 75 and the trip 80 normally in the path thereof, as shown in Fig. 4.

In order to control the trips 79 and 80 at each actuation of a tabulator key I employ a yokelike universal bar 102 the forwardly bent arms 103 of which are pivoted at 104 to the auxiliary frame 34. This universal bar overlies the upper edges of all of the interponents 43 in a position to be moved upward around its pivots 104 to the Fig. 5 position when any of said interponents is elevated on the depression of the corresponding tabulator key 47 The universal bar 102, 103 in its normal lowered position is supported by an adjustable screw stop 102* (Fig. 5) so as to normally maintain said bar free from contact with the interponents 43 as shown in Figs. 4 and 8. The universal bar 102 carries an adjustable contact in the nature of a bar 105 provided with inclined slots 106 (see Fig. 8) through which the stems of headed screws 107 pass. As shown in Fig. 4 the rear threaded ends of these screws are received in tapped openings in the universal bar 102. This construction affords a raising or a lowering of the contact 105 on the universal bar when the screws are loosened, and when they are tightened the contact is clamped in its adjusted position. This contact underlies the rear end of the trip 79, and as the universal bar is elevated the engaging end of the trip will be lowered to the Fig. 5 position in the path of the latch 75, or the projection 81 thereon. The same movement of the trip 79 moves the trip 80 to releasing position, shown in Fig. .5. This releases the latch 75 and it will engage the locking wheel 75 and cause the cam 71 to turn therewith and with the shaft 72. The same depression of a tabulator key elevated an interponent 43 in the path of the actuating member 46 so that when the latter is actuated by the released cam 71 the effective interponent will be moved rearward, as indicated in Fig. 5, to project the corresponding tabulator stop 8 to effective position. The cam 71 released from control of its trip 80 in the manner described, will make a half revolution before it is arrested and freed from connection with the driving shaft 72 by the trip 79 coacting with the latch 75, as shown in Fig. 5. The parts will remain in the position shown in this figure as long as the operator maintains the actuated tabulator key depressed, it being understood that such key should be held depressed until the carriage has completed its tabulating movement. When the operator releases said depressed key the companion link 49 will be drawn forward, lowering the associated slide 45 and interponent 43. This The rear end of the I results in a disengagement of the trip 79 and an interposing of the trip 80 in effective position, so that the cam 71 is freed to make the'second half of its revolution before it is arrested by the trip 80. The effect of this is to enable the actuating when the arm 82 is detached from said frame.

aware of this because of the peculiar action of the parts. In the present construction. theimmediate release of the tabulator key enables the cam 71 to make a complete cycle that results in projecting the associated stop 8 andactuating the carriage release mechanism, but such parts are enabled to immediately return to normal position during the second half revolution of the cam.

It will be observed from Fig. '7 that'the free end of each of the links 49 is beveled at 49. The purpose of such bevels is to facilitate assembling the parts. Thus, when the links 49 are detached from their levers 4'7 by the detachable nuts and screw pivots by which they are pivoted to said levers at 48, then a rearward sliding movement of each link on its supporting roller 50 will enable the inclined face 49 to coact'with the roller 54 on the associated slide 45 and automatically lift the roller off the plate 39 and enable the roller to bear against the upper edge on the link. A further rearward movement of the link carries it into its and detached from the coacting parts on the aux:

iliary frame 34. This construction enables the frame 34 with the parts carried thereby to be introduced into the machine-as a separate unit The recesses 43 in the upper edges of the interponents 43 are provided to enable the actuatin member 46 to clear said interponents when the latter are'in the lowered position.

In the present construction, as in that of my prior application SerialNo. 510,941, filed Jan. 24, 1931, the frame of the machine is made of two sections, hinged together at the rear thereof to enable the upper section to be swung back on.

the lower base section 35. 'In the present construction the carriage, the tabulator frame with the parts carried thereby, the-shaft 23 together with the parts connected therewith, and the slides 12 together with the parts that support and guide 'them are carried by the upper swinging section of the frame, whereas the remaining parts of the and the tabulating mechanism is in condition to function.

The construction is such that the power actuated tabulator mechanism may be rapidly actuated with the exertion of but very little force on the tabulator keys, yet the mechanism is comparatively simple in construction and easy to assemble in existing machines, with little or no modification of the existing structural features thereof.

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

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

1. The combination of tabulator stops, a motor, a cam driven thereby, tabulator keys, selective means controlled by said keys for selectively moving said stops. to'eifective position by said cam and for maintaining'a projected stop in effective position so long as the associated tabulator key is held in its actuated position.

2. The combination of tabulator stops, a power driven cam, tabulator keys, and selective means controlled by said keys for selectively moving said stops to effective position by said cam.

3. The combination of tabulator stops, a power driven cam, tabulator keys, selective means controlled by said keys for selectively moving said stops to effective position by said cam, and means effective on the depression of a tabulator key for disconnecting said cam from its power driven means after the cam has completed a part only of its cycle and thereby holding the projected stop in effective position while the key is maintained depressed.

4. The combination of a power driven shaft, a cam loosely mounted on said shaft, connecting means for fixedly connecting said cam to turn with said shaft, a tabulator key, means controlled by said key for controlling said connecting .means to effect a partial revolution of said cam with the shaft on'the depression of said key and cam when the key is released and returns to normal position, and a tabulator stop moved to effective' position by said camon the first partial revolution thereof and returned to normal position onthe completion of the revolution of the cam.

5. The combination of a power driven shaft, a cam loosely mounted thereon, a latch for fixedly connecting said cam to turn with said shaft, a

- plurality of tabulator stopscontrolled in their movement into and out'of effective position by said cam, a pluralityof tabulator keys and means controlled thereby-for selectively controlling the tabulator stop to be actuated by said cam and for controlling said latch.

6. The combination of a power driven shaft, a

cam loosely mounted on said shaft, a latch for fixedly connecting said cam to turnv with said shaft, a tabulator stop, means including said cam for controlling the movement of said tabulator stop into and out of effective position, a tabulator key, and means controlled thereby for controlling said latch, said last mentioned means comprising two 'trip devices which coact alternately with said latch.

'7. The combination of a power driven shaft, a cam loosely mounted thereon, a latch for fixedly connecting said cam to turn with said shaft, a tabulator stop, means including said cam for controlling the movement of said tabulator stop into and out of effective position, a tabulator key, and means controlled thereby for controlling said latch, said last mentioned means comprising two trip devices which coact alternately with said latch first to enable the latch to be moved to engaging position by withdrawing one trip device from contact therewith during the depression of the tabulator key and for simultaneously interposing the other trip device in the path of the latch to disengage it after the cam has completed a predetermined extent of turning movement.

8. The combination of a power driven shaft,

a cam, loosely mounted thereon, a latch carried by said cam for positively connecting said cam to turn with said shaft, a tabulator stop, means including said cam for controlling the movement of said tabulator stop into and out of efl'ective po-.

sition, a tabulator key, and means controlled thereby for controlling said latch, said last mentioned means comprising two trip devices which coact alternately with said latch first to enable the latch to be moved to engaging position by withdrawing one trip device from contact therewith during the depression of the tabulator key and for simultaneously interposing the other trip device in the path of the latch to disengage it after the cam has completed a predetermined extent of turning movement, whereby the projected tabulator stop may be held in its effective position as long as the key is held depressed, the second trip device being withdrawn from contact with the latch and the first trip device being interposed in the path thereof when the depressed key is released by the operator and returns to normal position, thereby enabling the tabulator stop to return to normal ineffective position and a disconnection of the cam from the power shaft to be effected when the cam has completed its cycle.

9. The combination of tabulator stops, and power driven means for actuating said tabulator stops including a power actuated cam, selective interponents one for each of said tabulator stops, tabulator keys, and means controlled by said keys for selectively controlling said interponents for actuation by said power actuated cam.

10. The combination of tabulator stops, and power driven means for actuating said tabulator stops including a power actuated member, selective interponents one for each of said tabulator stops, tabulator keys, means controlled by said keys for selectively controlling said interponents for actuation by said power actuated member, a rotary cam for actuating said power actuated member, and means controlled by the tabulator keys for controlling the rotation of said cam.

11. The combination of tabulator stops, actuating connections therefor, and power driven means for actuating said tabulator stops including a power actuated reciprocatory member, power actuated mechanical means for controlling the reciprocation of said reciprocatory member selective members movable selectively into the path of said reciprocatory member where they are rendered effective to transmit motion from said reciprocatory actuating member to the actuating connections for said tabulator stops, tabulator keys, and means controlled by said keys for selecti'vely controlling said selective members for the transmission of movement through the actuating connections to the respective tabulator stops.

12. The combination of tabulator stops, actuating connections therefor, and power driven means for actuating said tabulator stops including a power actuated member, selective members movable into and out of positions where they are rendered effective to transmit motion from said actuating member to the actuating connections for said tabulator stops, tabulator keys, means controlled by said keys for selectively controlling said selective members for the transmission of movement through the actuating connections to the respective tabulator stops, a power actuated cam, and means controlled by said keys for causing said cam to be actuated by its power actuated means. I

13. The combination of tabulator stops, actuating connections therefor, and power driven means for actuating said tabulator stops including a power actuated member, selectivemembers movable into and out of positions where they are rendered effective to transmit motion from said actuating member to the actuating connections for said tabulator stops, tabulator keys, means controlled by said keys for selectively controlling said selective members for the transmission of movement through the actuating connections to the respective tabulator stops, a power actuated cam for actuating said actuating member, and means controlled by a depression of any of said keys for effecting a half revolution of said cam under the force of its power and for effecting the second half of the revolution of said cam when a depressed key is released and returns to normal position.

14. The combination of tabulator stops, a reciprocatory actuating member therefor, actuating connections for said stop including selective members movable into and out of the path of said actuating member, tabulator 'keys, means controlled thereby for selectively moving said selective members into the path of said actuating member, and power means for reciprocating said actuating member and for holding it in its ac tuated position so long as a tabulator key is maintained depressed.

15. The combination of tabulator stops, a reciprocatory actuating member therefor, actuating connections for said stop including selective members movable into and out of the path of said actuating member, tabulator keys, means controlled thereby for selectively moving said selective members into the path of said actuating member, power means for reciprocating said actuating member and for holding it its actuated position so long as a tabulator key is maintained depressed, and means controlled by said keys for controlling the action of said power means on said actuating member.

16. The combination of tabulator stops, an actuating member therefor, actuating connections for said stop including selective members movable into and out of the path of said actuating member, tabulator keys, means controlled thereby for selectively moving said selective members into the path of said actuating member, a cam for controlling the movement of said actuating member, power means for turning said cam, and

means controlled by said keys for controlling the I movement of said cam by its power means.

1'7. The combination of tabulator stops, an actuating member therefor, actuating connections for said stop including selective members movable into and out of the path of said actuating member, tabulator keys, means controlled thereby for selectively moving said selective members into the path of said actuating member, a cam for controlling the movement of said actuating member, power means for turning said cam, means controlled by a depression of each of said keys for turning said cam a half revolution by its power means thereby holding the projected stop in effective position as long as a key is held depressed and for turning the camthe other half revolution when the depressed key is released and returns to normal position, thereby afiording a return of the projectedtabulator stop to normal position.

18. The combination of a power actuated shaft, a cam loosely mounted on said shaft, locking shaft, a plurality of tabulator keys, means conshaft, a plurality of tabulator keys, means controlled by the actuation of any of said keys for controlling said locking means, a plurality of tabulator stops, and selective means intermediate said cam and stops and selectively controlled by said keys for selectively controlling the movement of'said stops into and out of effective position under control of said cam.

20. The combination of a power driven shaft, a cam loosely mounted on saidshaft, a latch carried by said cam, a locking wheel fixed to turn with said shaft and with which said latch is adapted to engage to cause the cam to turn with the shaft, a tabulator key, means controlled thereby for controlling the movement of said latch into and out of engagement with said locking wheel, a tabulator stop, a normally ineffective actuating device intermediate said cam and tabulator stop for controlling the movement of said stop by the cam into and out of effective position, and means controlled by said tabulator key for rendering said actuating device effective.

21. The combination of a power driven shaft, a cam loosely mounted on said shaft, a latch carried by said cam, a locking wheel fixed to turn with said shaft and with which said latch is adapted to engage to cause the cam to turn with the shaft, a plurality of tabulator keys, means controlled thereby for controlling the movement of said latch into and out of engagement with said locking wheel, a plurality of tabulator stops, actuating devices actuated by said cam for controlling the movement of said stops into and out of effective position, and selective means controlledby said keys for selectively rendering said actuating devices effective;

22. The combination of a power driven shaft, a cam loosely mounted on said shaft, a latch carried by said cam, a locking wheel fixed to turn with said shaft and with which said latch is adapted to engage to cause the cam to turn with the shaft, a plurality of tabulator keys,

' means controlled thereby for controlling the movement of said latch into and out of engagement with said locking wheel, a plurality of tabulator stops, and means actuated by said cam for controlling the movement. of said stops into and out of effective position, said last mentioned means comprising an oscillatory member controlled by said cam, individual actuating devices one for each of said stops, and means controlled by said keys for selectively moving said actuating devices into the path of said oscillatory member.

23. The combination of tabulator stops, and

power actuated key selected means for controlling the movement of said stops into and out of effective position, said means including a power actuated oscillatory member,'individual actuating devices one for each of said'stops, tabulator keys, means controlled by said keys for selectively moving said actuating devices into the path of said oscillatory member, and means for maintaining the actuated tabulator stop in its actuated position so longas the associated tabulator key is held depressed.

24. The combination of tabulator stops, and

power actuated key selected means for controlling the movement of said stops into and out of effective position, said means including an oscillatory member, individual actuating dev ces one for each of said stops, tabulator keys, means controlled by said keys for selectively moving said actuating devices into the path of said oscillatory member, individual actuating devices movement of said oscillatory member, a power driven shaft, connecting means for connecting said cam to turn with said shaft, and means controlled by said keys for controlling said connecting means.

25. Thecombination of tabulator stops, and power actuated key selected means for controlling the movement of, said stops into and out of effective position, said means including an oscillatory member, individual actuating devices one for each of said stops, tabulator keys, means controlled by said keys for selectively moving said actuating devicesinto the path of said oscillatory member, a cam that controls the movement of said oscillatory member, a power driven shaft, connecting means for connecting said cam 'to turn with said shaft, and means controlled by the movement of any of said individual actuating devices into and out of the path of the oscillatory member for controlling said connecting means.

26. The combination of tabulator stops, and power actuated key selected means for controlling the movement of said stops into and out of effective position, said means including, a universal actuating member, individual actuating devices one for each of said stops, tabulator keys, means controlled by said keys for selectively moving said actuating devices into the path of said universal actuating member, a cam that controls the movement of said member, a power driven shaft, connecting means forconnecting said cam to turn with said shaft, and means controlled by the movement of any of said individual actuating devices into and out of the path of the universal actuating member for controlling said connecting means, the movement of any of said actuating devices into the path of said member resulting in connecting the cam to its shaft and the movement of such device out of the path of said member resulting in disconnecting the camfrom its shaft.

27. The combination of tabulator stops, and power actuated key selected means for controlling the movement ofsaid stops into and out of effective position, said means comprising a power actuated shaft, a cam, a latch for looking said cam to turn with said shaft, two trips for controlling said latch, means for connecting said trips to move in unison, one trip moving into the path of the latch when the other trip moves out of the path thereof, tabulator keys. and means controlled thereby for controlling the movements of said trips.

28. The combination of tabulator stops, and power actuated key selected means for controlling the movement of said stops into and out of effective position, said means comprising a power actuated shaft, a cam, a latch for looking said cam to turn with said shaft, two trips for controlling said latch, means for connecting said trips to move in unison, one trip moving into the path of the latch when the other trip moves out of the path thereof, tabulator keys, means controlled thereby for controlling the movements of said trips, an oscillatory actuating member oscillated by said cam, individual actuating devices one for each tabulator stop, and means controlled by said keys for selectively moving said actuating devices into the path of said oscillatory member.

29. The combination of tabulator stops, and power actuated key selected means for actuating said stops, comprising a continuously running motor-driven shaft, a cam, a spring-pressed latch carried by said cam for connecting the cam to turn with said shaft, means coacting with said latch to release it, and means coacting with said cam to hold it against the reactive force of its latch-spring when the latch is released.

30. The combination of tabulator stops, and power actuated key selected means for actuating said stops comprising a continuously running motor-driven shaft, a cam having a high spot thereon, a spring-pressed latch carried by said cam for connecting the cam to turn with said shaft, means coacting with said latch to release it, and a spring pressed roller bearing against said cam and coacting with the said high spot on the cam to hold the latter against the reactive force of its latch spring when the cam is in normal position and the latch is released.

31. The combination of tabulator stops, and power actuated key selected means for actuating said stops comprising a continuously running motor-driven shaft, a cam having two oppositely positioned high spots thereon, a spring-pressed latch carried by said cam for connecting the cam to turn with said shaft, means coacting with said latch to release it at each half revolution thereof, and a spring pressed roller bearing against said cam and coacting with the high spots thereon to hold the cam against the reactive force of its latch spring when the latch is released, said roller comprising part of the means for controlling the movements of said tubulator stops.

32. The combination of a machine frame comprising two connected relatively movable sections, and tabulator mechanism parts of which are carried by one of the frame sections and parts of which are carried by the other of the frame sections, coacting parts of the tabulator mechanism on the two sections being brought into cooperative relation when the frame sections are brought together. 33. The combination of a machine frame comprising two connected relatively movable sections arranged one above the other, and power actuated key controlled tabulator mechanism parts of which are carried by one of said frame sections and parts of which are carried by the other of the frame sections, coacting parts on the two frame sections being brought into cooperative relation when the frame sections are brought together.

- FREDERICK A. HART.

CERTIFICATE or CORRECTION.

Patent. No. l, 945, 895.

February 6, 1934.

. FREDERICK A. HART.

It is hereby certifiedthat error appears in the printed specification of the above numbered patent requiring correction as follows:

Page 6, "M84, claim 24. for "individual actuating devices" read a cam that controls the; and thatthe aaid Letters Patent should be read with this correction therein that the aam may conform to the record of the case in the Patent Office.

Signed and sealed this 19th day of June, A. D. 1934.

(Seal) Bryan M. Battey Acting Commissioner of Patents.

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