US2542658A - Garbell - Google Patents

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US2542658A
US2542658A US2542658DA US2542658A US 2542658 A US2542658 A US 2542658A US 2542658D A US2542658D A US 2542658DA US 2542658 A US2542658 A US 2542658A
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actuator
bars
slide
bar
selector
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06CDIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C23/00Driving mechanisms for functional elements
    • G06C23/02Driving mechanisms for functional elements of main shaft
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J7/00Type-selecting or type-actuating mechanisms
    • B41J7/48Type carrier arrested in selected position by electromagnetic means

Description

COMPUTING MACHINES Filed Dec. 4, '1944 6 Sheets-Sheet 1 grwwwtoo MAX GARBELL I 7 I r 9 8fl6gl5lfllzlvj gimme 9 8 7 6 5 4 3 2 in 9 8 7 6 5 4.3L2 f 9 7 nO Ru AM 3L2 IIKB W p 7 1 ARE 4b 2 3 TH I s L 2 u M'W 7 6 5 4- h 2 rj F L L FfHF W w I w 1 Feb. 20, 1951 M. GARBELL 2,542,653
SELECTOR uscumxsm FOR REGISTERING COMPUTING MACHINES 6 Sheets-Sheet 2 Filed Dec. 4, 1944 gvyuamkvo M AX GARBELL.
Feb. 20, 1951 M. GARBELL 2,542,658
SELECTOR MECHANISM FOR REGISTERING COMPUTING MACHINES Filed Dec. 4, 1944 6 Sheets-Sheet 3 E I: M
7 QYWWT' M. GARBELL SELECTOR MECHANISM FOR REGISTERING COMPUTING MACHINES Feb. 20, 1951 6 Sheets-Sheet 5 Filed D60. 4, 1944 L L E B R A G X A M Feb. 20, 1951 M. GARBELL v SELECTOR mscmmxsm FOR REGISTERING COMPUTING MACHINES 6 Sheets-Sheet 6 Filed Dec. 4, 1944 Zwuvnfo p MAX GARBELL Patented Feb. 20, 1951 SELECTOR MECHANISM FOR REGISTERING COMPUTING MACHINES Max Garbell, Los Angeles, Calif., assignor to Royal Typewriter Company, Inc., New York, N. 1., a
corporation of New York Application December 4, 1944, Serial No. 566,595
8 Claims; (Cl. 101-93) This invention relates to a computing machine of the type embodying a series of type wheels bearing numerical indicia, a keyboard embodying a plurality of banks of keys with each bank comprising a. series of consecutively numbered keys, selective mechanism for controlling positioning of the type wheels on depression of the'keys, and driving mechanism for actuating the type wheels through the medium of the selective mechanism for disposing numerical indicia on one or more of the type wheels in printing position according to the selection made by depressing a key in one or more of the banks thereof.
An object of the invention is to provide an improved construction in the selective mechanism and the associated actuating mechanism such as to facilitate construction and assemblage of the parts and result in a computing mechanism that is highly efllcient and durable.
It has heretofore been the practice in the construction of machines of the above character to employ systems of links, levers and slide bars in the selective mechanism and forming these parts with various curves, bends and offsets to the end of converging the selective mechanism from a wide area keyboard to a relatively short length of type wheel assembly resulting in a large number of differently formed and arranged parts that are costly in manufacture and assemblage.
A purpose of this invention is to eliminate the use of such complicated parts and to provide in lieu thereof a simple arrangement of a series of parallel selector bars one of which is provided for each bank of keys, together with a complementary series of actuator rack bars with gear connections between the actuator rack bars and the selector bars whereby predetermined movement of the former will determine movement of the latter, together with a rack and pinion arrangement for actuating the type wheels from the actuator rack bars.
Another object is to provide a construction whereby movement of the selective mechanism and the actuating mechanism may be effected from an operating mechanism through toothed gear connections.
A further object of the invention is to provide a new and improved mechanism for automatically efiecting printing of a zero in an order in which no selector key has been operated when a selector key in the next higher order has been operated.
With .the foregoing objects in view, together with such other objects and advantages as may subsequently appear, the invention resides in the 2 parts and in the combination, construction and arrangement of parts hereinafter described and claimed, and illustrated by way of example in the accompanying drawings, in which:
Fig. 1 is a plan view of the machine showing the keyboard and type wheel arrangement;
Fig. 2 is a view in section and elevation as seen on the line 2-2 on Fig. '1 in the direction indicated by the arrows with the parts disposed in a normal position;
Fig. 3 is a view in horizontal section and plan taken on the line 3-4 of Fig. 2 with portions removed;
Fig. 4 is a view in horizontal section and plan taken on the line 4-4 of Fig. 2 with portions removed;
Fig. 5 is a view in end elevation of the parts shown in Fig. 4 with portions removed;
Fig. 6 is a detail in elevation and section taken on the line 6-8 of Fig. 4 showing one of the operating units and illustrating the mode of operation of the invention;
Fig. 7 is a detail in section and elevation taken on the line 1-1 of Fig. 2 depicting a single unit of the assemblage;
Fig. 8 is a detail in side elevation of a fragmentary portion of the structure shown in Fig. 6 illustrating the operation of a tension arm element;
Fig. 9 is a detail in section and elevation taken on the line 9-9 of Fig. 2 as seen in the direction indicated by the arrows depicting the key releasing mechanism;
Fig. 10 is a detail in elevation taken on the line Ill-40 of Fig. 9;
Fig. 11 is a fragmentary plan view as seen on the line llll of Fig. 9 showing the means whereby the parts are initially automatically positioned to indicate zeros in banks to the right of a bank in which a key is actuated where no numbered key has been operated in a bank to the right;
Fig. 12 is an enlarged sectional view taken on the line 12-" of Fig. 11 depicting the mechanism for automatically disposing the zero indicia in printing position and illustrating in dotted lines the mode of operation thereof.
Referring to the drawings more specifically, A indicates generally a keyboard assembly of conventional character embodying a series of banks B of keys in with the keys in each bank consecutively numbered from 1 to 9 inclusive and with the correspondingly numbered keys of the several banks arranged in rows C. The keyboard assembly A includes a frame structure D suitably p e N and a bottom plate i3 spaced below the top plate and connected thereto by side walls 14. Each of the keys I includes a stem l5 which projects downwardly from the heads ll through openings in the top plate 12 of the frame structure D and through elongated slots l6 in the bottom plate I 3 of the frame D. The stems 15 are formed with longitudinally extending guide slots 11, and extending through the slots l1 in the stems of each row C of the keys I0 is a guide rod i8 carried by the frame D. The keys III are normally maintained in their uppermost or retracted positions by coil springs i9 paralleling the rods I8 and passing through the stems l5 and carried by the frame structure D; the springs I8 and rods 18 being carried by the side walls l4 of the frame D as indicated in Fig. '7.
A narrow slide plate 20 is mounted for longitudinal movement below each bank B of the keys In each of which plates is provided with a plurality of longitudinally extending slots 2| through which the key stems l5 extend and each slide plate is normally urged in one direction by means of a pull string 22 extending between the forward end portion of the plate 20 and the forwardmost rod l8; the slots 2| being so formed and arranged that when the plates 20 are in their normal retracted positions under the urge of the springs 22 the forward ends of the slots will abut the forward edges of the stems l5, as particularly shown in Fig. 2.
Formed on the forward edge of each of the stems l5 contiguous the plate 20 is a cam-detent 23 embodying an inclined lower face 24 which when the key is in its normal position abuts at the lower portion thereof with the forward end of the contiguous key stem receiving slot 2| and which also embodies a ledge 25 constituting the upper margin of the cam-detent which is adapted to be positioned beneath the slide plate 20 in engagement with the underside of the margin of the key-stem receiving slot 2| when the key is depressed as indicated in full lines in Fig. 6. The inclined face 24 is operable to effect advance of the slide plate 20 in opposition to the spring 22 on depression of the key In to effect interengagement between the slide plate and the ledge 25 whereby the key will be retained in a depressed position. The depressed keys interlocked with a slide plate 20 are released from the latter by effecting advance movement of the slide plate independent of the keys by suitable release mechanism which will be later described. I
In carrying out my invention I provide a series of selector slide bars 21 arranged in parallel relation immediately below the keyboard assembly: there being a slide bar 21 extending longitudinally beneath each bank B of the keys III with the upper edges of the slide bar contiguous but spaced from the lower end of the key stems 15.
Each of the slide bars 21 embodies an elongated plate positioned with its opposed narrow edges extending upwardly and downwardly. The slide bars 21 are formed contiguous their opposite ends with longitudinally extending slots 23 and 29 engaged by supporting bars 30 and 3| carried on the side walls 32 and 33 of a supporting structure H arranged within the housing G; the selector slide bars being slidably supported on the rods Bill and Iii and being retained in their gar; position by having their forward end portions extended into guide slots 34 formed in a cross wall 35 extending between and carried by the walls 32 and 33.
Extending transversely beneath the-assembly of selector slide bars 21 is a series of parallel rock shafts 36 which shafts correspond in number to the selector slide bars. The rock shafts are geared to the selector slide bars; there being a rock shaft for each slide bar with a segmental gear 31 on the rock shaft meshing with rack teeth 38 on the lower margin of the associated slide bar. Each of the slide bars is thus provided with an independent actuating means and whereby any one of the series of selector slide bars may be shifted longitudinally independently of the others and whereby the slide bars may be actuated singly or in multiple according to which one or more of rock shafts 36 is operated.
The gear connections between the several rock shafts and slide bars are progressively arranged. As here shown a series of eight selective slide bars is arranged between the supporting walls 32 and 33 and are geared successively from right to left to the associated eight rock shafts from the innermost to the outermost of said shafts.
Arranged beneath the rock shafts 36 is a series of parallel actuator slide bars 40 extending transversely of the rock shafts in parallel relation to each other and supported for longitudinal movement on rods 4| and 42 slidably engaging longitudinally extending slots 43 and 44 in the opposite end portions of the actuator slide bars. The slotted end portions of the actuator slide bars 40 extend through guide channels 45 and 46 formed on the rods 4| and 42 whereby the bars 40 are maintained upright.
Formed on each of the actuating slide bars 46 is a rack 46 engaged by a toothed segment 41 carried on one of the rock shafts 36, there being a slide bar 40 for each rock shaft 36. The several actuator slide bars 40 are consecutively geared from right to left with the several rock shafts 36 from the innermost to the outermost of the latter.
It will now be seen that longitudinal movement of any of the actuator bars 40 will act through the segmental gear 41 engaged therewith to rock the associated rock shaft 36 and thereby effect longitudinal movement of the associated selector bar 21 through the pinion 31 and rack 38 in a direction opposite the direction of movement of the actuator slide bar 40 as indicated by the arrows a and b in Fig. 6.
The inner end of each of the actuator slide bars 40 is formed with an upward extension 48 carrying a rack 49 paralleling the path of travel of the actuator bar and which rack 49 meshes with a pinion 50 on a type wheel 5|. A series of the type wheels 5| is thus provided corresponding in number to the actuator bars 40; the type wheels 5i being independently revolubly mounted on a shaft 52 with the adjacent type wheels disposed in close relation to each other.
The type wheels 5| are each equipped with a series of printing indicia 53 numbered COHSBCU? tively from 1 to 9 inclusive preceded by a zero indicia c followed by a blank or relief space indicated at d. Normally the several type wheels are disposed with their complementary indicia aligned as indicated in Fig. 1 and with the relief spaces d presented to the printing position.
Means are provided for operating the actuator bars 40, here shown as embodying a rock shaft 54 arranged beneath the actuator bars 48 and extending transversely thereof and on which rock shaft 54 is mounted a series of segmental gears 55 meshing with toothed racks 56 formed on the lower margins of the actuator bars. The segmental gears 55 are loose on the rock shaft 54 whereby the latter may be turned without effecting movement of the segmental gears; a series of tension arms 51 being fastened on the rock shaft 54 having their outer ends connected to the segmental gears 55 by pull springs 58 so arranged and 'tensioned that on swinging the arms 51 in opposition to the spring 58 the latter will act to swing the segmental gear 55 in unison with the arm 51 when the actuator rock bars 48 are free to move, but when movement of any of the actuator bars is restrained, as will presently be described, and the segmental gear 55 engaged therewith be thereby held against movement, swinging of the arm 51 by turning the rock shaft 54 independent of the held segmental gear will occur by reason of stretch of the spring 58 extending between the arm 51 and the held segmental gear. The segmental gears 55 are normally maintained in their retracted positions by pull springs 59 having one end connected to the segmental gears 55 and having their outer ends connected to a fixed bracket 60 disposed forwardly of the rock shaft 54; the springs 59 acting through the segmental gears 55 to restore the bars 21 and 40 to normal.
Any suitable means may be provided for eflecting rocking of the rock shaft 54. The means here shown comprises a pull crank 8| on a shaft 52 fitted with an arm 83 having a pin 64 on the outer end thereof engaging an eccentric slot 55 in a rocker arm 66, which is geared to the rock shaft 54; the rocker arm 65 being pivoted at one end as indicated at 61 and having rack teeth 88 at the other end thereof extending on an arc concentric with the pivot 61 which teeth 58 mesh with a spur gear 89 on the rock shaft 54.
Limiting the advance longitudinal movement of the actuator slide bars 40 determines the extent of rotation of the type wheels 5| through the pinions 58 on the type wheels by the racks 49 carried by the actuator slide bars. This limiting of the movement of the actuator slide bars is effected by limiting movement of the selector bars 21 and is accomplished through the medium of the keys ill in the keyboard A. For this purpose the upper margins of the selector slide bars 21 are formed with a series of spaced laterally extending stop lugs 10 with the lugs on each selector slide bar so arranged relative to the lower ends of the stems l 5 of the keys III that on depression of a. key to its lowermost position the lower portion of the stem will protrude into the path of a lug 10 so that the lug on abutting the'stem l5 on forward movement of the selector bar will arrest such movement at a point determined by the particular key in a bank thereof having been depressed. The lugs 10 are varied in their spacing relative to the key stems throughout the length of -a selector slide bar with the spacing between the lugs and their respective cooperating key stems progressively increased from the forwardmost to the rearwardmost key stem whereby the selector slide bars will have progressively increasing lengths of travel in the numerical order of the keys; this spacing being such in relation to the gear connections with the type wheels and the numbered type faces thereon that when a. key l8 bearing the numeral 1 is depressed, the selector bar will be permitted to move 'a distance such as to allow movement of the actuator bar 48 a distance such as to turn the type wheel associated therewith a distance to present the type numeral 1 thereon in printing position, and so on progressively throughout the series of the numbered keys in the bank thereof. However, no stop lug In need be provided for the 9 key since the maximum movement of the selector slide bars may be determined by the endsof the slots 28 and 28 abutting the supporting shafts 38 and 3 I.
Each of the selector bars 21 is provided at its inner end portion and on the upper edge thereof with a rack 1| with which is meshed a toothed segment 12 turnably supported on a stop member 13 on a shaft 14, the stop member 13 being in the form of a generally circular disk and arranged so that a portion of the peripheral margins thereof will be presented to the end of a slide bar 28 with which the stop member 13 is aligned. Formed on the stop member 13 is a shoulder 15 arranged to underlie the inner end portion of the contiguous associated slide bar 28 such that when the slide bar is in its normal retracted position the stop member 13 will be held against rotation thereby operating through the segment 12 and rack 1| to hold the selector bar against longitudinal movement and accordingly holding the companion actuator bar against movement through the gear connection between the selector bar and the actuator bar until the slide bar 20 is advanced so as to free the shoulder 15 Of a stop member 13 associated with the advanced slide bar. The associated selector bar 21 will then be free to move to an advanced position during which movement the stop member 13 will be rotated to move the shoulder 15 past the inner end of the slide bar. The shoulder 15 is formed with a notch 16 adapted to receive the end of the slide bar 20 on the latter being slightly advanced in order to permit initial movement of the selector and actuator bars a distance suflicient to turn the type wheel 53 to present the zero indicia c thereon to printing position.
A rock shaft 11 is arranged on a plane above and slightly forward of the shaft 14 on which is mounted a series of depending fingers 18 for engaging the inner ends of the slide bars 28. The rock shaft 11 is journalled in the side walls 32 and 33 and its outer end extends through the former and is fitted with a depending arm 19 normally maintained under the pull of a spring against the upper end 8| Of a lever 82 pivoted at 83. The lever 82 is formed with a downwardly extending lower end 84 which carries a spring snap 85 pivoted at 88 on the lever 82 and having 9. depending lower end portion 81 normally extending in the path of a finger 88 on the rock shaft 62. The finger '88 is desi ned on turning the rock shaft 62 in a forward direction to ride past the ends 81 of the latch 85 into the dotted line position shown in Fig. 10 in which operation the snap 85 swings in opposition to its spring 88; the arm 88 then being adapted to engage the snap 85 on its return movement and effect rocking of the lever 82 so as to swing the arm 19 in opposition to the spring 80 and rock the rock shaft 11 in a direction to cause the fingers 18 thereon to advance the slide bars 29 therein releasing any depressed push button Ill so that the latter may be restored to normal. A bend 38 on the snap 85 engages an edge of the lever 82 to limit movement of the snap in one direction. A stop pin 9| forms an abutment for the upper end of the lever a: to limit movement thereof in one direction under the urge of the spring 80 and finger I9.
Each of the slide bars to the left of the one at the extreme right of the assembly is formed with a lateral projection 82 which extend in front of and in spaced relation to a shoulder 93 on the slide bar 20 to the right thereof whereby on advancing any of the slide bars carrying the projection 92 the latter will be caused to engage the shoulder 93 and cause a slight advance of the slide bar 20 to the right of the one initially actuated. This operation moves the inner ends of the slide bar to the right of the initially operated one a distance sufllcient to clear the shoulders 15 on the sleeves 13 yet not sufllcient to clear the notch 16 thereby permitting slight turning movement of the associated stop member 13, thus freeing the associated selector bar and slide bars for such initial movement as to effect turning of the type wheel 50 to dispose the zero indicia c to printing position.
In the operation of the invention, on depression of a key I in any bank thereof, a key pin in any bank thereof will effect snap engagement of the slide bar 20 with the depressed key stem as before described and as shown in full lines in Fig. 6. In this operation the slide bar 20 will be advanced by the inclined face 24 on the detent 25 and will be retained in a partly advanced position by reason of the upper portion of the stem l being wider than the portion normally engaged with the end of the slot 2| in the slide bar 20 so as to hold the inner end of the slide bar clear of the shoulders 15-16 on the stop member I3, thereby freeing the latter. The lower end of the key stem IE will then be presented in the path of one of the lugs on a selector slide bar 21.
On turning the operating rock shaft 54 as through the medium of the crank 6| the actuator slide bar 40 will advance as before described according to the limitations imposed by projection of the depressed key stem into the path of travel of the lug 10 thereby operating the associated type wheel 53 to turn the latter to present to printing position a numerical indicia thereon corresponding to that carried by the depressed key.
Depression of any key in the first bank to the right of the assembly will release its associated actuator bar 40 to turn the type wheel to present the selected numerical indicia thereon to its printing position. Likewise depression of any key in any of the other banks of keys will release its associated selector bar for actuation of its associated type wheel in like fashion. Where no key is depressed in the bank to the right of a bank in which a key is depressed the selector associated with the non-selector bank next adjacent the selected bank will be free to move the short distance necessary to dispose the zero indicia on the associated type wheel in printing position and which operation is occasioned by the provision of the second stop afforded by the notch 16 on the stop member 13.
By the provision of the tension arm 5! connecting the actuator rock shaft 54 with the tooth segment 55 for actuating the selector bars 40 the several selector bars will be advanced on rocking the rock shaft 54 a distance according to the limitation of their travel afforded either by the stop member 13 or cooperation of the stems IS with the lugs 10 on the selector bars.
After the printing operation has been effected in the conventional fashion not here shown, which as is common in machines of this character,
8 is accomplished on a downward pull imparted to the crank 6i, return movement of the crank will operate through the lever 82 to rock the rock shaft 11 and thereby cause the fingers 58 to shove any operated slide bars Ill out of engagement with stop members 18 so as to permit the depressed keys to return to normal. The springs 22 will restore the slide plates III to normal and spring I! acting through the segmental gears 55 will restore the slide bars 40 and 21 to normal while movement of the selector bars 4| to normal will restore the type wheels to normal.
While I have shown and described a specific embodiment of my invention I do not limit myself to the exact details of construction set forth, and the invention embraces such changes, modifications and equivalents of the parts and. their formation and arrangement as come within the purview of the appended claims.
I claim:
1. In a computing machine, a plurality of parallel longitudinally movable actuator bars, an operating rock shaft extending transversely beneath said actuator bars, a series of segmental gears complementary to the series of ,actuator bars on said rock shaft and relative to which said shaft is turnable, rack teeth on said bars engaged by said segmental gears, spring means normally maintaining said segmental gears in retracted position, arms fixed on said rock shafts, tension pull springs connected between said arms and segmental gears, numerical registering means, means for operating said registering means by movement of said actuator bars, and key controlled means for selectively limiting the length of travel of each of the actuator bars.
2. In a computing machine, an operating rock shaft, 9. series of arms fixed on said shaft, a segmental gear on said shaft alongside each of said arms, relative to which said rock shaft is turnable, a yieldable connection between each of said arms and its companion segmental gear, an actuator slide bar adjacent each of said segmental gears, rack teeth on said bar engaged by the adjacent segmental gear, means for supporting and guiding said actuator bar for longitudinal movement, a type wheel associated with each actuator bar, gear connections between the type wheel and its associated actuator bar whereby longitudinal movement of the actuator bar will effect rotation of the type wheel, means for normally holding said actuator bars against longitudinal movement. key controlled means for freeing said actuator bar holding means to permit longitudinal movement of said actuator bars, and means associated with said key controlled means for limiting the length of the path of travel of said actuator bars to various distances.
3. In a computing machine, an operating rock shaft, a series of arms fixed on said shaft, a segmental gear on said shaft alongside each of said arms relative to which said rock shaft is turnable, a yieldable connection between each of said arms and its companion segmental gears, an actuator slide bar adjacent each of said segmental gears, rack teeth on said bar engaged by the adjacent segmental gear, means for supporting and guiding said actuator bar for longitudinal movement, a type wheel associated with each actuator bar, gear connections between the type wheel and its associated actuator bar whereby longitudinal movement of the actuator bar will effect rotation of the type wheel, means for normally holding said actuator bars against longitudinal movement, key controlled means for freeing said actuator bar holding means to permit longitudinal movement of said actuator bar, a series of selector slide bars each of which is associated with one of said actuator bars, gear connections between a selector bar and its associated actuator bar, and means on said selector bar associated with said key controlled means for limiting the length of travel of said actuator bars to various distances.
4. In a computing machine, a plurality of type wheels, a reciprocal actuator bar associated with each of said wheels, means for reciprocating said actuator bars, means for rotating said type wheels from said actuator bars, a reciprocal selector bar associated with each actuator bar, connections between each slide bar and an associated actuator bar, a slide bar associated with each selector bar, a turnable stop member at the inner end of each slide bar, gear connections between said stop members and associated actuator bars, a shoulder on each of said stop members engageable with the end of the adjacent slide bar for holding said stop member against turning while the slide bar is in its normal position, selective key controlled means for shifting said slide bars out of engagement with said shoulders to release said stop members, and means associated between said selector bars and said key controlled means for predetermining the length of travel of said actuator barsv 5. In a computing machine, a plurality of actuator slide bars, means for reciprocating said actuator bars, a complementary series of selector bars independent movement transmitting connections between each of said actuator and one of said slide bars, means engaging each of said slide bars engaged by a selector bar to hold the latter stationary, key controlled means for shifting said slide bars to release said engaging means, means interengaging adjacent slide bars whereby advance movement of a slide bar will effect shorter advance movement of an adjacent slide bar, and means on said engaging means for partly releasing it o short advance of its associated slide bar to permit initial short movement of the associated selector and actuator bars, a printing wheel for each actuator bar carrying zero indicia, and driving means connecting the actuator bars to said printing wheels operable to turn the respective printing wheels to dispose the zero indicia in printing position on the aforesaid initial short movement of an associated actuator bar.
6. In a computing machine-a series of selector slide bars, a companion series of actuator slide bars, means for reciprocating said actuator slide bars, gear connections between said selector bars and actuator bars, rack teeth on said selector bars, stop members having gear segments meshing with said rack teeth, a pair of adjacent shoulders on each of said stop members, a slide bar said key controlled means for limiting the length of travel of said selector bars.
7. In a computing machine a frame, a plurality of parallel longitudinally movable key limited slide bars having key stops thereon, keys on the frame cooperable with said key stops, a series of parallel actuator slide bars and a type whee] adapted to be actuated by each said actuator slide bar, a gear member between each key limited slide bar and the respective actuator slide bar having agear connection to each respective slide bar, means for actuating the actuator slide bars distances limited by. the key setting of the key limited slide bars, and an intermittent delayed action spring driven actuator for each actuator slide bar, each said last actuator comprising a shaft on the frame, a tension arm rotatably mounted thereon, a segmental gear independently rotatable on the shaft and having a geared connection with the actuator slide bar, a tension spring between the tension arm and the segmental gear adapted to move said segmental gear in response to movement of the tension arm, and a type wheel responsive to each actuator slide bar.
8. In a computing machine a frame, a plurality of parallel longitudinally movable actuator slide bars thereon, a series of complementary longitudinally movable key limited slide bars on the frame. a series of keys cooperable with each said key limited slide bar, a free floating gear means and support therefor carried by the frame at a location between and transverse to each actuator slide bar and the complementary key limited slide bar, said gear means having a gear connection of one ratio with the actuator slide bar and a gear connection of another ratio with the key limited slide bar, a type wheel responsive to actuation of each actuator slide bar, mean adapted to actuate said actuator slide bars through distances limited by said key limited slide bars, a
slide plate for each key limited slide bar having slots adapted to admit the keys, a lateral projectionon each slide plate and a shoulder on the slide plate next adjacent and engageable therewith, the spacing between projection and shoulder being progressively greater from one extreme slide plate to the other, and a zero gear stop means comprising a transverse shaft spaced endwise from the slide plates, a freely rotating geared element on the shaft for each slide plate in rack and gear engagement with the respective actuator slide bar and a projection onthe geared element engageable with the slide plate at zero position of the slide plate and adapted to arrest movement of the actuator slide bar.
- MAX GARBELL.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,224,873 Walter May 1, 1917 1,241,140 Nicholson- Sept. 25, 1917 1,742,053 Ball Dec. 31, 1929 1,790,790 Breitling Feb. 3, 1931 2,082,282 Garbell June 1, 1937 2,384,789 Crosman May 16, 1944 2,361,260 Buehler Oct. 24, 1944 2,418,027 7 Gubelman Mar. 25, 1947
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Cited By (8)

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US2707432A (en) * 1950-12-16 1955-05-03 Theodore B Hirschberg Jr Machine for writing checks
US2710406A (en) * 1950-12-16 1955-06-07 Addressograph Multigraph Machines for producing business instruments
US2811307A (en) * 1954-08-31 1957-10-29 Ferraro Raul Carlos Full key board listing-adding machines
US2867168A (en) * 1953-11-06 1959-01-06 Ibm Printer positioning mechanism
US3046878A (en) * 1962-07-31 westbrook
DE1165912B (en) * 1956-05-15 1964-03-19 Onno Fimmen Dipl Ing Setting mechanism for four-species calculating machines
US3186636A (en) * 1965-06-01 Receipt printing and validating device
US3930444A (en) * 1973-04-25 1976-01-06 Carl Valentin Gmbh Printing device for imprinting selected characters on a movable record medium

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Publication number Priority date Publication date Assignee Title
US3186636A (en) * 1965-06-01 Receipt printing and validating device
US3046878A (en) * 1962-07-31 westbrook
US2710406A (en) * 1950-12-16 1955-06-07 Addressograph Multigraph Machines for producing business instruments
US2707432A (en) * 1950-12-16 1955-05-03 Theodore B Hirschberg Jr Machine for writing checks
US2867168A (en) * 1953-11-06 1959-01-06 Ibm Printer positioning mechanism
US2811307A (en) * 1954-08-31 1957-10-29 Ferraro Raul Carlos Full key board listing-adding machines
DE1165912B (en) * 1956-05-15 1964-03-19 Onno Fimmen Dipl Ing Setting mechanism for four-species calculating machines
US3930444A (en) * 1973-04-25 1976-01-06 Carl Valentin Gmbh Printing device for imprinting selected characters on a movable record medium

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