US2291133A - Calculating machine - Google Patents

Calculating machine Download PDF

Info

Publication number
US2291133A
US2291133A US2291133DA US2291133A US 2291133 A US2291133 A US 2291133A US 2291133D A US2291133D A US 2291133DA US 2291133 A US2291133 A US 2291133A
Authority
US
United States
Prior art keywords
carriage
lever
shifting
shaft
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US2291133A publication Critical patent/US2291133A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices

Description

July 28, 194.2. H. T. AVERY 2,291,133
CALCULATING MACHINE Original Filed Dec. 18, 1933 '7 Sheets-Sheet l INVENTOR Harold T Avery ATTORNEY July 28, 1942.
H. T. AVERY CALCULATING MACHINE Original Filed De '7 Sheets-Sheet 2 INVENTOR Hora/0' T. Ave/y av ATTORNEY July 28, 1942. H. "r. AVERY CALCULATING MACHINE Original Filed Dec. 18, 1933 7 Sheets-Sheet 3 m .Y M w -mfimHLr MM m T. W
m a y H. 'r. AVERY 2,291,133
GALCULATINGMAGHINE July 28, 1942.
7 Sheets-Sheet 4 Original Filed Dec. 18, 1933 Flt-5-5..
INVENTOR HQ Q' TA very ATTORNEY July 28, 1942. H. T. AVERY 2,291,133
CALCULATING MACHINE Original Filed Dec. 18, 1953 7 Sheets-Sheet 5 Mia INVENTOR Ham/d 7. Avery ATTORNFV July 28, 1942. H. T. AVERY 2,291,133
CALCULATING MACHINE Original Filed Dec. 18, 1933 '7 Sheets-Sheet 6 M FIE.1E
INVENTOR Harold TAver-y ATTORNEY July 28, 1942. AVERY Q I 2,291,133
CALCULATING MACHINE Original Filed Dec. 18, 195:5 7 Sheets-Sheet '7 FIEJE- INVENTOR Hero/a TAve/y ATTORN EY Patented July 28, 1942 2,291,133 CALCULATING MACHINE Harold T. Avery, Oakland, Calif., assignor to Marchant Calculating Machine Company, a corporation of California Original application December is, 1933, Serial No. 702,949. Divided and this application January 15, 1940, Serial No. 313,918
14 Claims.
This invention relates to a machine having a shiftable carriage and has particular reference to a calculating machine of the type used to perform the cardinal calculations, including division and multiplication.
The invention is illustrated as embodied in a calculating machine of the type disclosed and claimed in Patent Number 2,211,736, issued August 13, 1940, on the copending application of Harold T. Avery, entitled Calculating machines, Serial Number 702,949, filed December eighteenth, 1933, of which the present application is a division. Reference is hereby made to the above Avery patent for disclosure of a complete calculating-machine including mechanisms not specifically described herein. It is to be understood, however, that although the invention is shown as applied to a machine of the general type disclosed in the above patent, the invention is also applicable to calculating machines of other types.
Calculating machines of the type referred to above usually have incorporated therein a stationary body portion and a laterally shiftable carriage thereon carrying the various calculation registering mechanisms. The carriage is shiftable either under automatic or manual control to different positions in order to enable the actuators, under control of certain selecting mechanism in the main body portion of the machine,
to actuate different orders of the registering mechanism.
The principal object of the present invention is to provide a machine in which the carriage may be automatically shifted ineither direction from anyposition to any other pre-selected position.
Another object is to provide improved setting and operating means for such carriage shifting mechanisms.
Another object is to provide a machine in which the carriage can be automatically traversed to a pre-selected position as an incident tothe termination of a calculation operation, such as a division or multiplication operation.
Another object is to provide optional controls whereby the carriage may be moved to a preselected position, either under manual control at any time or automatically as an incident to the termination of a multiplication or division operation.
Another object is to provide means settable to indicate a given carriage position and means for later initiating movement of the carriage to the indicated position without disturbing the indicating means, thereby obviating the necessity of resetting the indicating means if it is desired to'again return the carriage to the indicated position.
Another object ,of the present invention is to provide improved means for shifting a carriage in either direction.
The machine of the present invention enables the operator to pre-select any of a number of carriage positions and thereafter, either on termination of a multiplication or division operation or on depressing a tabulator key, the carriage will automatically return to the pre-selected position. This operation obviates the necessity for the operator to direct his entire attention to the positioning of the carriage after one calculation and preparatory to thenext calculation, as is necessary when the stopping of the carriage is determined by manual release of a shift key just as the carriage reaches its desired starting position. Thus, in a machine embodying the present invention, the operator will be free to prepare the various selecting and control keys for the next calculation while the carriage is being automatically moved to itspredetermined starting position.
The manner in which the above and other objects of the invention .are accomplished will be readily understood on reference to the following specification when read in conjunction with the accompanying drawings, wherein:
Figure l is a plan view of a calculating machine embodying the present invention and showing the keyboard, carriage, and the several controls.
Figure 2 is a sectional side elevation showing details of portions of the power operated mechanism utilized for shifting the carriage.
Figure 3 is a sectional view taken in part along the line 3-4 in Figure 2, showing the construction'of, the shift unit and its connection to the carriage.
Figures 4 and 5 illustrate details of the control mechanism for the shift unit. Y
Figure 6 is a sectional side elevation view illustrating the mechanism controlled by the tabulator key, and the carriage, for operating the carriage shifting mechanism.
Figure '7 is a sectional side elevation view taken through the forward portion of the machine and illustrating details of a portion of the tabulator controlling mechanism.
Figure 8 is a sectional view taken along the line 88 of Figure 'I and showing the connection between the tabulator key and certain parts of the tabulator control mechanism.
Figure 9 is a sectional view taken along the line -9 of Figure 7, showing a portion of the tabulator mechanism.
Figure 10 is a sectional plan view taken through a portion of the tabulator control mechanism.
Figure 11 illustrates the details of construction of the dial assembly associated with the tabulator control knob.
Figure 12 is a plan view, with parts broken away, showing a ortion of the tabulator control mechanism in the frame of the machine, and the relation of this control mechanism to the carriage.
Figure 13 is a sectional side elevation view taken through the machine and illustrating the can'iage dipping mechanism and certain mechanism utilized in connection with the shifting of the carriage.
Figure 14 illustrates certain details of the mechanism utilized in connection with the carriage dipping mechanism.
Figure 15 is a transverse sectional view through the carriage illustrating the mechanism for disconnecting the carriage from the carriage shifting mechanism.
Referring to Figure 1, the calculating machine is shown as comprising a keyboard having a number of aligned rows of nu-meral keys I00. The keys I00 determine the amount entered by the actuating mechanism into the diil'erent orders of an accumulator register I0, provided in a shiftable carriage 250, in accordance with the numerical values of the particular keys I00 depressed.
Add and subtract bars 000 and 000, respectively, are provided for controlling such actuating mechanism (not shown) to add or subtract an amount set up in the various keys I00 to or from an amount set up in the register 20",. while a division key 910 is .provided to control the actuating mechanism to divide an amount set up on the keys I00 into an amount appearing on the register 23I8. A stop key 085 is provided for arresting the operation of the machine in automatic division whenever desired. A row of multiplier keys M00 is arranged along the right hand side of the machine to control the actuator mechachine.
Carriaae shifting mechanism Shifting of the carriage 200 is effected from a driving motor (not shown) by a shift mechanism illustrated in Figures 2 to 5, inclusive. under control of a control member I000 rockable on a shaft IO0I. Member I000 is rocked either clockwise or counter-clockwise under manual or aulticlangatic control in a manner to be described When member I000 is moved clockwise, an extension I002 thereon is positioned in engagement with a toothed wheel I000 and the carriage is shifted to the right. When member I000 is moved counter-clockwise, it positions a point I000 thereon in engagement with a star wheel and the carriage is shifted to the left.
'll'e engagement of the toothed wheel I000 or of the wheel I000 by the control member I000 results in the selective turning of a carriage shifting shaft 000 by power transmitted through the following mechanism. A gear 002 (Figure 3) continuously rotated by the driving motor (not shown) whenever the motor circuit is closed, is secured to a'shaft I000. which is journaled'in bearings provided in center .and right side frames 020 and ,0", respectively. A sleeve I 000, also secured to the shaft I000, has mounted thereon a gear 000, driving certain related parts (not shown). A member I00 is suitably fixed to the sleeve I000 and has a pair of lugs formed thereon and extending into notches IOII formed in the gear 040 to provide a driving connection between this gear and shaft 000.
nism to multiply an amount set up on keys I00 by an amount corresponding to the numerical value of the particular multiplier key depressed.
The manner in which the above mentioned actuating mechanism is controlled by the various control keys is described in detail in the above mentioned patent. The keyboard also includes a tabulator key I500 for initiating carriage movement to a position d termined by the setting of a tabulator knob I090, and a back space key I000 for initiating, when depressed, a one step shift of the carriage to the right.
The carriage 200, in addition to its accumulator register 20I0, comprises a pair of counter registers I000 and IO0I aligned side by side, directly above the register 20I0, for the purpose of counting the various machine cycles and thereby displaying the quotient in division operations and the multiplier in multiplication operations.
The carriage of the machine illustrated is movable in either direction to nine diflerent positions. However, the number of positions may be increased or decreased as desired without affecting the mode of operation of the machine. The position of the carriage at any one time is indicated by a stationary pointer I000 which. in the example illustrated in Figure 1, indicates A spider I000 is secured to the gear 000 and sleeve I000 by riveting over the end of sleeve I000 upon which the spider I000 is fixed. Spider I000 has welded to one side thereof an internal ring gear IOI0. Thisgear IOIl is in mesh with three planetary gears IOI0, each riveted to one end of a respective shaft IOIl. three such shafts being journaled in bearings IOI0 equi-spoced from each other in a toothed wheel I000. The planetary gears IOI0 also mesh with asun gear I020 formed upon one end of a sleeve I02I, which is rotatably mounted on a reduced portion of the shaft I000 and has the star wheel I000 suitably secured thereto. Planetary gears I022 are formed on the opposite ends of shafts II and mesh with,
axes to rotate the sun gear "21 and its associated gear I020. In this case, sun gear I020, sleeve I02I and star wheel I000 merely idle on shaft I000. If, however, the star wheel I000 is held by point I000 of control member I000, the sun gear I020 will be held stationary and the planetary gears I3I6 and I322 will both rotate about their own axes and revolve about the gear I321 driving the gear I324 in the opposite direction. This selective reversal of rotation of gear I324 is utilized to effect a shift of the carriage in either direction.
A gear I326 (Figure 3) is rotatably mounted on a hollow shaft I33I between a cam I332 (Figures 3 and 5) and a spacer I330 keyed to said shaft. A sleeve I333 (Figures 3 and 4) is also rotatably mounted on the hollow shaft and supports a cam I334 thereon, while a centralizer disc I335 is keyed to the hollow shaft I33I. A spring I331 is compressed between a lock washer I338 and lock nuts I333 mounted on a threaded shaft I336 which is screwed into the hollow shaft I33I. This construction provides for a friction drive connection between gear I326 and shaft I33I effected by cam I332 and spacer I330 which are keyed to shaft I33I and pressed against the gear I326 by spring I331 bearing against the lock washer I330, the centralizer disc I335, the spacer I333, and the cam I332.
The hollow shaft I33I is supported in a suitable bearing I340 provided in the supporting plate 524 of the machine. A mitre gear I34I is fixed on the end of the shaft I33I and meshes with a mitre gear I342 mounted on the lower end member is rocked clockwise or counter-clockwise to initiate a carriage shift, the projection I353 will seat either under or above the ear I354 on member I300 and therefore latch that member in its displaced position.
Upon rotation of shaft I33I (see also Figure 4), lever I350 is moved by cam I334 to release the ear I354 at about the middle of the carriage shifting cycle. An arm I356 is secured to a bushing I345 pinned to shaft I35I.and includes an extension or nose I351 engaging the periphery of cam I334 so that when this cam rotates, the lever I356 is moved in a counter-clockwise direction to engage an ear I358 on lever I350 and rock it to of the vertical shaft 334, rotatably supported in an angle piece I343 secured to the base plate 2I5I of the-machine which also carries a sleeve bearing I344 riveted to the angle piece, which bearing supports an end of the hollow shaft I33I.
A plate 333 is secured to the upper end of shaft 334 and has a pair of diametrically opposed rollers 332 mounted on the upper surface thereof. Rollers 332 mesh with the teeth of a comb 330 (Figures 3, 12, and 15) supported at the rear of the carriage 250 and thereby shift the carriage transversely on rotation of shaft 334.
It should be noted that the various teeth in comb 330 are spaced apart from each other a distance'equal to the spacing between each of the nine different carriage positions. Thus, each half rotation of the shafts 334 and I33I will shift the carriage from one operating position to the next. To enable manual shifting of the carriage independently of the shifting mechanism, the comb 330 is pivoted on a shaft 33I (Figure 15) and is rockable out of engagement with the rollers 332 on the plate 33. The comb 330 has a slot formed in a vertical wall thereof, into which slot a lug 339 formed on a lever 335 extends. The lever 335 is also pivoted on the shaft 33I and extends through a slot in the carriage cover, terminating in a handle 336. The lever 335 is normally. held in a raised position against a stop pin 338 by a tension spring 331 so as to position the comb 330 in mesh with the rollers 332. However, when the handle is depressed by the operator the comb 330 is raised away from the rollers enabling the carriage to be moved sideways.
Spring means are provided to centralize the control member I300 into the position shown in Figure 2, as will be described hereinafter, and, in order to maintain the member I300 in displaced position until the carriage has been shifted a full step, once a shift is initiated, the following mechanism is provided.
A latch lever I350 (Figure 2) is pivot-ed on a shaft I35I and is urged in a clockwise direction by a tension spring I352. When member I300 is in its centralized positionindicated in Figure 2, a projection I353 on lever I350 abuts an ear I354 formed on the member I300. However, when the release extension I354.
It is.to be noted that the cam I334 includes two opposite steeprises over which the nose I 351 rides. Upon clockwise'rotation of the cam from the position shown in Figure 4, the nose I351 rides over one of these rises at about the middle of the cycle, while, if counter-clockwise rotation of the cam I334 took place, the arm I356 would be moved a distance suillcient to release the ear I354 early in the cycle. To secure the same cyclic time of operation of the lever I350. regardless of the direction of carriage shift, the cam I334 is free on the sleeve I333, unaffected by spring I331 which presses disc I335 against the end of sleeve I333, and is driven by the centralizer disc I335 which is keyed to shaft I33I. As appears in Figure 2, this disc I335 includes an elongated notch or depression I360 in which a roller I36I on cam I334 is movable. Upon clockwise rotation of the centralizer disc I335 from the position shown in Figure 2, roller I 36I on cam I334 is engaged immediately by the adjacent edge of the notch I360 and the cam I334 is rotated. However, upon counter-clockwise rotation of the centralizer disc I335, the roller I36I is engaged by the opposite side of the notch I360 of the disc I335 only after the centralizer has rotated nearly half a, revolution so that the rocking of the arm I356 and disengagement of the ear I354 occurs at the same cyclic time in each case.
The centralizer disc carries two rollers I363 (Figure 2) against which an arm of hell crank I364 bears under the pull of a spring I364A so as to centralize the drive unit as well as the carriage proper at the end of a carriage shift, providing, of course, the member I300 is centralized at this time.
To further aid in maintaining the control member I300 in controlling position until just before the end of a carriage step or shift, a lever I365 (Figures 2 and 5) is provided. Lever I365 is also mounted upon the shaft I35I and is pulled by spring I366 in a counter-clockwise direction so that its tail I361 rides against the periphery of cam I332. This cam I332, which is keyed to the hollow shaft I33I, serves to rock the point I363 on the lever I365 into and out of engagement with the shelf I354, the point lying either above or below the shelf depending upon the direction of movement of the member I300. The lever I365 is moved in to hold the shelf I354 just before the projection I353 is pulled out and thus ensures that the clutch operation will continue. This lever I365 is rocked out just before the end of each individual shift cycle so that member I300 can be centralized to disengage the unit and the shift will end, unless the shift called for is a multi-order shift, in which event member I300 will be held in its displaced position by other means hereinafter described.
The shifting mechanism is maintained in a neutralposition when not called on to shift the carriage by the following mechanism. Referring to Figures 2 and 6, the control member I340 is pivotally connected to a link I314, the other end of which is pivoted to the upper end of a lever I315 rockable about a shaft I315. Lever I315 is resiliently maintained in a centralized position, to maintain the control member I344 in a centralized position, by a centralizing lever I4I0 which is pivoted at I4II on a stationary pin extending from the machine frame. Lever I4I0 has an extension I4I4c normally in engagement with lever I315 above shaft I314 and a lower offset portion I4I0b normally in engagement with lever I315 below shaft I315. Lever I4 is urged in a counter-clockwise direction by aspring I444 tensioned between a stationary pin I44I and an ear I402 on the lever I4I4 so as to hold the lever I315 in the position shown in Figure 6 whenever the various shift controlling mechanisms to be described hereinafter are not in operative positions. The lever III is also providedwith extending flngers I4 I which [lie on opposite sides of lever I315 and act as guides.
Tsnons'rmc Csaamcn San-r Cosraonnso Mncnsmsx Direction control The details of the mechanism for controlling the direction and extent to which the carriage moves upon depression ofthe tabulating key I504, or at the end of a division or multiplication operation, will now be described. As appears in Figure 12, a Geneva crm I524 is mounted on a shaft I52I journaled in a bracket I522 on the left side frame 523 of the machine. Shaft I52I is connected by a flexible spring coupling I523 to a shaft I424 likewise icurnaled in brackets I525 on the side frame. Rotation of the shaft I524 is transmitted through another flexible coupling I524 to an angularly positioned shaft I521 Jour- Inaled in brackets I524 on the side frame and bottom frame 2I5I of the machine to another flexible connection I524 which is connected to a stub shaft I534 (Figure 10) journaled in a bearing I534 on a vertical flange I544 of the bottom frame 2I5I of the machine. A gear I53I is secured to stub shaft I530. The. several flexible couplings are formed of springs wound over each other in opposite directions and inserted into the shafts to which they are joined and wherein they are secured by set screws and sweating.
The Geneva cross I524 (Figure 12) engages a rack I532 which is fixed to the carriage along the left hand rear side thereof, each step of movement of the carriage from one position to the next causing a ninety degree rotation of the Geneva cross. This results in a quarter rotation of the gear I53I and its shaft I534 (see also Figure 10) in the supporting bearing I534. Rotation of gear I53I also rotates a gear I534 meshing therewith, which is fixed to a sun gear I431 (Figure 10) formed on a shaft I534. -This shaft I534 is journaled at one end in a member I534 riveted to the flange I540 and at the other end in one end of a shaft I54I. Rotation of the sun gear I531 causes rotation of dual planetary gears I542 and I543 to rotate a ring gear I544, revolution of the planetary gear support being prevented except during manual setting. The planetary gears are disposed on opposite ends of a shaft iournaled in a plate I545, secured on shaft I54I, rotatably mounted in a supporting bearing I544 so that it can be set to any desired position by knob I494,
which is utilized to predetermine the position to which the carriage is to return, but will otherwise remain fixed.
The ring gear I544 issecured to a spider I548 (see also Figure 9) having an extension I549. This extension is provided with a pin I550 which, as the spider is rotated, moves around the inner periphery of a member I55I, pivotally mounted by means of stud I553 in bushing in front frame member 2I5'I. H
In that position shown in Figure 9, the pin I550 is seated in a notch I552 in member I55I, this position corresponding to that which the parts occupy when the carriage is in the position corresponding to the carriage position indicated by the setting of knob I499.
As shown in Figures 10 and ii, the knob I499 is fixed to shaft I54I and is manually adjustable into nine different rotational positions. For the purpose of holding shaft I54I in any selected position a ratchet member I554, keyed to shaft I54I. is engaged by a roller I553 mounted on a lever I55I, pivoted at I552 to the frame member 2IOI. Roller I553 is pulled into any one of nine equispaced notches in member I544 by a spring I555 to hold the shaft in any adJusted position. A dial I550 keyed to shaft I54I carries numerals I555, visible through an opening I551 (Figure l) in the cover I I5 of the machine so that the setting of the tabulator may be readily noted.
The mechanism whereby the knob I499 revolves the planetary gears I542 and I543 to any of a series of radial stations about shaft I54I constitutes a means for forming a series of mechanical representations corresponding to the respective positions of the carriage, because in each of the radial positions, or stations, to which these gears may be set, the mechanism controlled thereby will cause the carriage to be arrested when it reaches a different position corresponding to the setting of the gear positioning mechanism.
From the above it will be readily understood that the pin I550 will be differentially moved to either side of its position shown in Figure 9 in accordance with both the carriage position at an one time and the setting of knob I449. Thus, when the carriage 250 moves to the left of a position indicated by the setting of knob I499, the pin I554 rocks out of notch I552 and in a counterclockwise direction about shaft I54 I This motion of pin I554 causes it to rise against the upper inner periprery of lever member I55I and thus cause that member to rock clockwise on its supporting stud I553. Likewise, when the carriage 250 moves to the right of a position indicated by the setting of knob I444, the pin I550 will cause the lever member to rock counter-clockwise from the position shown in Figure 9.
The tail of member I55I is bifurcated (Figure 9) to receive one end of a lever I554 pivotaliy supported on a pin I555 (Figure 7) and which carries a stud I554 lying in a slot in a lever I5I0. Lever I5" is rockable about a shaft I5I I to either side of the medial position shown in Figure 7 and forms a direction control member to determine the direction of the carriage shift when such takes place. That is, the lever I4I0'is positioned on one side or'the other of its medial position depending on whether the position of the carriage is to one side or the other of the carriage position indicated by the knob I449.
Member I5I4 has a T-shaped slot I5I2 therein, the lowermost portion or stem of which is disposed substantially vertically when the member is in its medial position. A pin I5I3, mounted on a link um pivoted at m1 to .5. 1m ma free on a shaft I418, extends into the slot l5l2 and normally rides in the upper portion thereof when the tabulator shift is inoperative due to a spring I550 which raises the forward end of link I5I0.
- to the right, as viewed in Figure '1, depending on the position of lever I5I0 at that time.
Such movement of link I5I0 initiates operation of the carriage shifting mechanism to shift the carriage in one direction or the other according to the direction of movement of said link. Referring to Figures 6 and 7, a link I413 is also plvotally connected at one end thereof to the pin I481 and has a notch I414 at the other end thereof, normally held in engagement with the lower end of the carriage shift lever I315 (previously described in connection with the carriage shifting mechanism) by means of a link 1410 pivotally connected between link I413 and a bell crank I025 supported on a shaft 010. Thus, if the lever I5I0 is positioned clockwise of it medial position when the tabulating shift operation is started by depressing the forward end of link I5I0, the shift control lever I300 will likewise be moved clockwise to institute a shift of the carriage to the right, and if lever I5I0 is positioned counter-clockwise of its medial position at such time a shift to the left will be instituted.
Actuation Describing first the manual actuation of the tabulating shift controls, the tabulator key I500 (Figure 6) is molmted upon a stem II supported by a pin I502 in a slot in the key stem and by a lever I503 pinned toa shaft I410 (Figures 6, '1, and 8) to which it is pivotally connected.
and the right side frame 0I0 and carries there- This shaft extends through the center frame 534 and the right side frame 0I0 and carries thereon, adjacent the center frame, a member I504 (Figure 7) which is pinned to the shaft. Freely supported upon the shaft I410, adjacentmember I504, is a member I411 provided with a tail I505 carrying a roller I500 overlying lever I5I0. The member I504 and the member .I411, respectively, include noses extending toward each other and retaining a strong compression spring I501.
. Member I504 includes a shelf I500 which extends beneath the tall I505 to prevent over extension of the spring I501. Movement of member I504 by shaft I410 is transmitted to the member I411 through the spring I501 so that the roller I503 will be depressed upon depression of the tabulator key I500 rocking lever I5I0 on pivot I401 to depress the pin I5I3 of lever I5I0 into the. stem of the T-slot I5I3 in lever I5I0 and thus institute the carriage shift.
Means are providedyfor latching the parts in this position to maintain the shifting mechanism in operation even though the operator may remove his finger from the key I500. The lever I5I0 includes an extension I514 carrying a pin I5I5 which engages a nose I5I5 on the lever I5I1. Lever I5I1 is pivotally supported by a pin I5I0 and is pulled by a spring so that its nose I5I0 engages the pin I5I5. Depending upon whether the carriage is to the left or to the right of the desired position, the pin I5I5 will lie either above or below the nose I.5l6 omit the carriage is in the position called for by the tabulatin setting mechanism, it will stand against the nose as appears in Figure '1. If the pin I5I5 is above the nose I5I5, the pin I5I3 will ride down the left hand side of the T-shaped slot l5l2 upon depression of the key I500 and the link I413 will be moved to the right. If the pin I5I5 is below the nose I5I5, the pin I5I3 will ride down the right hand side of the notch I5I2 and the link I413 will be moved to the left as is shown in F ure '1.
In either case, the latch end of lever I5I1 will be pulled into engagement with the upper side of the stud which carries the roller I500, thereby holding the tail I505 and lever I5I9 depressed. Movement of the carriage thus initiated carries it toward a position corresponding to the setting of knob I400, and operation of the shifting mechanism is automatically terminated when the carriage arrives in that position. Pin I550 (Figure 9) is returned toward notch I552 in member I! by such carriage movement, and when the pin enters this notch it tends to return member I55! to the medial position 'in which the latter is shown in Figure 9. although the entire linkage comprising member I55I, lever I554, lever I5I0 (Figure '1), lever I5I9, link I413, lever I315 (Figure 6) and link I314 will be held displaced until near the end of the current shift cycle by the shift control member I300 which i held in displaced position until the end of the shift cycle by the levers I350 and I365 as previously described. Atapproximately theend of the current shift cycle, however, levers I355 and I350 release member I300, and centralizer I4I0 pulled by spring I400 returns the entire linkage system described above, as well as member I300, to medial position, terminating operation of the shift mechanism.
When lever I5I0 returns to its medial position shown in Figure 1, due to the movement of the carriage 250 into a position corresponding to the indicated carriage position of knob I499, the pin l5l5 thereon will rock lever I5I1 to release the stud on which roller I500 is mounted. Retraotion of roller I505 enable the tabulator key I500 to be raised by its spring I50Ia .to its inoperative position. I
The automatic initiation of the tabulating shift mechanism as an incident to termination of a multiplication or division calculation operation will now be described.
Normally, during division and multiplication operations, except when the carriage is in its extreme left end position, an automatic shift of the carriage one step to the left is instituted at the completion of the calculation in the partic- 'ular order in which the carriage is positioned.
means disclosed in detail in the above Avery application and which will be described hereinafter. Link I811 has an upwardly turned end I818, a downwardly turned end I880, and-is pivotally mounted intermediately by a pin I818 on a lever I880. The lever I880 is pivotally supported on a shaft I88I mounted in the frame of the machine while a spring I882 is provided between an extension of the lever I880 and link I811 to pull the link I811 counter-clockwise. Lever I880 is pivoted at the upper end thereof to a dog I888 having a shoulder formed thereon which is normally in engagement with an ear I888 on the link I814, except when the carriage is in its left end position. The dog I888 has an elongated slot I818 therein which rides over a pin I814 formed on an arm of a lever I812, pivotally mounted in the frame of the machine, which lever is nor-' mally held in the position illustrated in Figure 6, except when the carriage is in its left end position.
The right hand end of link I811 has the nose I888 thereof normally positioned below and against an extension I888 of an actuating member for moving the link I 811.
At the beginning of the division or multiplication operation in any one particular carriage order the extension I888 is moved to the right enabling the spring I882 to position the nose I888 of link I811 against the left hand edge of this extension I888. At the end of the operation in the particular carriage order the extension I888 moves to the left to likewise move link I811 to the left and, since the dog I888 is in engagement with the ear I884 of link I818, the shift control member I808 will be rocked counterclockwise through the link I818 and thus engage its point I804 with the star wheel I808 (Figure 2) of the carriage shifting mechanism and start a shift to the left. To insure a single step of movement of the carriage the link I811 is rocked clockwise against the action of the spring I882 by suitable means (to be described later) during the shifting operation and thereby move the nose I888 of link I811 under the extension I888 as shown in Figure 6. I
As the carriage is shifted into its left end position a nose I810 (Figure 6) on the right hand end of carriage 280 engages a beveled nose I81I on lever I812 to rock that lever in a counter, clockwise direction about its supporting shaft I888 against the tension of spring I818. The counter-clockwise rotation of lever I812 raises the dog I888 to remove the bottom shoulder thereof from against ear I888 on link I814 and bring an upper shoulder I811 of dog I888 into engagement with a shelf I818 on a lever I818 pinned to a shaft I880. Thereafter, on leftward movement of extension I888 as an incident to the termination of the calculation in the last carriage order (as described hereinbefore) dog I888 is rocked to shift the lever I818 to the left so that shaft I580 is rocked in a clockwise direction. This results in clockwise movement of a lever I88I also pinned to shaft I880 and a movement to the left in Figure 6 of a link I882 against the pull of a spring I 888. Link I882 is connected by a pin and slot connection I888 to a lever I888 pinned to shaft I818, as appears in Figure 8, so that the shaft I818 is rocked and the same action instituted as if the tabulating key I800 had been depressed. This results in the carriage being moved to that position determined by the tabulating-setting mechanism.
-mechanism depending on the AU'rouA'rIc CARRIAGI Smrr Corrrnor. Dunno Drvrsros AND Mormucnron As described hereinbefore, the carriage shift initiating link I811 (Figure 6) is moved to the left as an incident to the termination of a division or multiplication operation in each carriage position so as to move the dog I888 leftward and thereby institute either a carriage shift to the left or actuation of the tabulating shift control position of the carriage 280.
Although any means .may be employed to actuate link I811 the following mechanism, disclosed in the above Avery application, is preferably employed.
Referring to Figure 13, the carriage has a series of aligned plates, one of which is shown at 288, all connected at their rear ends to a bail 288 and supported at their forward ends for pivotal movement on a shaft 282. Three shafts 210, 212, and 828 are supported by the plates 268 and form part of the accumulator register 28I8. A pair of gears 218 and 21I, meshing with each other, are mounted on the shafts 210 and 212, respectively, in each order of the register, each gear 218 driving a respective dial shell 218. A pawl 8I8, rockably mounted on shaft 820, is provided in each order and is urged by a spring 8 into engagement with the teeth of the respective gear 21I to hold that gear stationary whenever it is not actuated by an actuator gear I88. Each shell 218 has a series of numerals from "zero" to nine" spaced around the periphery thereof, one of which is always visible through an opening formed in the cover of the carriage 280. The various dial shells in the different orders of the register 28I8 are connected together through suitable tens-carrying mechanism (not shown).
At the beginning of a calculation operation, such as multiplication or division, the bail 288 is dipped to mesh the gears 21I with respective actuator gears I88 which are mounted on sleeves I88 journaled on a shaft I10. Thereafter, the actuator gears I88 are rotated diflerential amounts in a manner described in the above mentioned application. After the conclusion of rotation of the gears I88, the gears 21I, having transmitted a certain rotation to the dial shells 218, are raised out of mesh with gears I88, and, in the case of multiplication or division, the carriage is automatically shifted to the left one step preparatory to continuation of the problem.
The means for dipping the carriage, from that position in which it appears in Figure 13, to bring gears 21I into mesh with gears I88 and then rollers 818 in engagement with cams 818 keyed on a shaft I so that the links 888 are positively pulled down by rotation of shaft I.
Means are provided for latching the carriage in raised position when the accumulator is not in operation and during shifting operations, and for latching the carriage in its lower position during engagement of gears 21I and I88. This means includes a latch lever 818 in the form of a bell crank pivoted at 818 and having a nose 811 formed at the upper end thereof to engage the in its raised position.
. To disengage the latch levers 515 and permit lowering of the carriage upon beginning of a setting clutch operation (not shown) preparatory to a calculation operation, as well as to latch the carriage in its lower position, means are provided to move levers 515 and so rock their noses 511 out of engagement with the lower edges of extensions 518, and back into engagement with the upper edges thereof. A lever 588 is secured to a shaft 58I in position to be engaged by an extension 582 on a plate indicated by dot-dash lines 552 rockable on shaft 225 (Figure 13) so that rocking of plate 552 by reverse cams 558 and 55I, keyed on shaft 43 I, also rocks shaft 58I, to which rocking arms 583 and 584 are attached. Arm 583 is connected to levers 515 by pivotal connections 585 so that when the levers are thus rocked, the links 555 are not held by noses 511 and cams 514 may then lower the plates 255 to engage the gears 21I with the actuator gears I88. As the gears I" are moved into mesh with the gears I88, cams 558 and 55I, by rocking plate 552 permit springs 518 to pull the latch levers 515 counter-clockwise to reengage noses 511 over extensions 518.
Pawls 28I, normally in engagement with the gears I88 when the gears 21I are raised, are released from the blocking of gears I88 when gears 282 to which is also keyed a lever 585 slotted to receive a pin 581 provided on an upwardly extending arm 588 formed on the rocking cam lever 518. As an incident to termination of rotation of the various actuator gears I88, a sleeve 584, rotatably mounted on a shaft 585 is rotated by a restore clutch 188. A cam 583 (Figure 14) secured on the sleeve 584 is thus rotated. This cam rocks a lever 58I clockwise about a shaft 588 to move lever 584 and so rock shaft 58I and levers 515 to release the latched-down carriage.
The sleeve 584 carries another cam 585 (Figure 13) which is employed to prevent the carriage from rising too rapidly. A lever 581, hinged on a shaft 588, bears against cam 585 and against a lever 588 keyed to a shaft 588. Levers 58I are also keyed to this shaft and joined by pin and slot connections 582 to the links 555 so that the rate of rise of the links 555 under the pull of spring 558 is no greater'than'that permitted by cam 585.
As the cam lever 518 is rocked counter-clockwise due to raising of the links 555 as an incident to the termination of the calculation in the particular carriage order, the extension I385 on lever 518, which extension is now to the right of the nose I385 of link I311, will engage that link and shift it to the left, thereby instituting a shift of the carriage 358 to the left unless-it is in its leftmost position.
To ensure that the carriage shift is limited to a single step, lever I311 is rocked clockwise and is disengaged from extension I385, during the carriage shift. It will berecalled that during the carriage shift operation cycle, cam I334 operates to move lever I355 (Figures 4 and 6) in a counterclockwise direction to remove lever I358 from engagement with extension I354 on the shift control member I388. Movement of the lever I355 also rocks a bell crank lines I381 (Figure 6) clockwise about a shaft I388 so that a shelf I388 thereon, which lies beneath indicated by the dot-dash the link I311, rocks link I311 clockwise about the pin I318 to release its nose I385 from extension I385. The shift control member I388 is thus freed from the restraint of extension I385 and can be released and centralized at the end of a single cycle of operation. During the first cycle of operation of the shifting mechanism, in the course of an automatically initiated tabulation operation, the same mechanism frees member I811 from lug I385 to permit key I588 to rise at the end of the operation.
I claim:
1. m a machine of the class described having a frame, a carriage transversely shiftable thereon to any of a series of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in synchronism with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including devices settable to any of a series of positions, each position corresponding to one of the respective operating positions of the carriage; direction control means including an element selectively settable jointly by said member and said devices upon setting movements of said carriage position mechanism and said tabulation control means or either of them, to control the direction of operation of said carriage shifting mechanism; and means controlled by said element, and operable after the same has been 21I are lowered. Pawls 28I .are keyed on a shaft 4 of the carriage;
selectively set, for selectively initiating operation of said carriage shifting mechanism to cause shifting of the carriage in one other in accordance with the setting of said element.
2. In a machine of the class described having a frame, a carriage transversely shiftable thereon to any of a series of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in synchronism with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including mechanism manually settable to indicate any of a series of opcrating positions of said carriage, and devices adjustable by said mechanism to correspondence with such indication; direction control means including an element selectively settable jointly by said member and said devices upon setting movements of said carriage position mechanism and said tabulation control means or either of them, to control the direction of operation of said carriage shifting mechanism; and means controlled by said element, and operable after the same has been selectively et, for selectively initiating operation of sad carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said elemen 3. In a machine of the class described having a frame, acarriage transversely shiftable thereon to any of a series of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in synchronism with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including devices settable to any of a series of positions, each position corresponding to one of the respective operating positions direction control means including an element selectively settable jointly by said member and said devices upon setting movedirection or the ments of said carriage position mechanism and said tabulation control mean or either of them,
to control the direction of operation of said carriage shifting mechanism; means controlled by said element, and operable after the same has been selectively set, for selectively initiating operation of said carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said element, and means responsive to said member and devices upon adjustment; thereof to correspondence, for arresting operation of said carriage shifting mechanism.
4. In a machine of the clas described having a frame, a carriage transversely shiftable thereon to any of a series of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in ynchronism with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including devices settable to any of a series of positions, each position corresponding to one of the respective operating positions v of the carriage; direction control means including an element selectively settable Jointly by said member and said devices upon setting movements of said carriage position mechanism and said tabulation control means or either of them, to control the direction oi operation of said carriage shifting mechanism; means controlled by said element, and operable after the same has been selectively set, for selectively initiating operation of said carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said element, and means responsive to said direc-,
tion control means for arresting operation of said carriage shifting mechanism.
5. In a machine of the class described having a frame, a carriage transversely shiftable thereon to any of a series of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in synchronism with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including devices settable to any of a series of positions, each position corresponding to one of the respective operating position of the carriage direction control means including an element selectively settable Jointly by said member and said devices upon setting movements of said carriage position mechanism and said tabulation control means or either of them, to control the direction of operation of said carriage shifting mechanism; means controlled by said element, and operable after the same has been selectively set, for selectively initiating operation of said carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said element, latch mean for maintaining said carriage shifting mechanism in operation after initiation of the operation thereof, and means responsive to said member and said devices upon adjustment thereof to correspondence, for rendering said latch mean ineflective.
6. In a machine of the class described having a frame, a carriage transversely shiftable thereon to any of a series of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in symchronism by said mechanism with said carriage to a position corresponding to the position occupied by said carriage: tabulation control means including devices settable to any of a series 'of positions, each position corresponding to one of the respective operating positions of the carriage; direction control means including an element selectively settable jointly by said member and said devices upon setting movements of said carriage position mechanism and said tabulation control means or either of them, to control the direction of operation of said carriage shifting mechanism; means controlled by said element, and operable after the same has been selectively set, for selectively initiating operation of said carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said element, latch means for maintaining said carriage shifting mechanism in operation after initiation of the operation thereof, and means responsive to said direction control means for rendering said latch means inefl'ective. '7. In a machine of the class described having a frame, a carriage transversely shiftable thereon to any of a series oi operating positions, and
motor driven means for shiftingsaid carriage; the combination of carriage position mechanism including a member settable in synchronism with ber and said devices upon setting movements of said carriage position mechanism and said tabulation control means or either of them, to control the direction of operation of said carriage shifting mechanism; means controlled by said element, and operable after the same has been selectively set, for selectively initiating operation of said carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said element, and means responsive to said member and devices upon adjustment thereof to correspondence, for arresting operation of said carriage shifting mechanism.
8. In a machine of the class described having a frame, a carriage transversely shiftable thereon to any of a series. of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in synchronism with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including mechanism manually settable to indicate any of a series of operating positions of said carriage, and devices adjustable to correspondence with such indication; direction control means including an element selectively settable Jointly by said member and said devices upon setting movements of said carriage tuhrltiothln controtlianrileans or either of them, to cone direc of operation of said carriage shifting mechanism; means controlled by said element, and operable after the same has been selectively set, for selectively initiating operation of said carriage :shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said position mechanism and said tab-- element, and means responsive to said direction control means for arresting operation oi. said carriage shitting mechanism.
9. In a machine of the class described having a frame, a carriage transversely shiftable thereon to any of a series or operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in synchronlsm with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including mechanism manually settable to indicate any of a series of operating positions of said carriage, and devices adjustable by said mechanism to correspondence with such indication; direction control means including an element selectively settable jointly by said member and said devices upon setting movements 'of said carriage position mechanism and said tabulation control means or either of them, to control the direction of operation of said carriage shifting mechanism; means con-= trolled by said element, and operable after the same has been selectively set, for selectively ini= tiating operation of said carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting of said element, latch means for maintaining said carriage shitting mechanism in operation after initiation of the operation there= of, and means responsive to said member and said devices upon adjustment thereof to correspondence, for rendering said latch means in efiective.
1c. in a machine of the class described having a frame, a carriage transversely shiitable thereon to any or a series of operating positions, and motor driven means for shifting said carriage; the combination of carriage position mechanism including a member settable in synchro with said carriage to a position corresponding to the position occupied by said carriage; tabulation control means including mechanism manuall settable to indicate any of a series of operatin positions of said carriage, and devices adjustable by said mechanism to correspondence with such indication; direction control means including an element selectively settable jointly by said mem= her and said devices upon setting movements oi said carriage position mechanism and said tabulation control means or either of them, to control the direction of operation of said carriage shitting mechanism; means controlled by said element, and operable after the same has been selectively set, for selectively initiating operation of said carriage shifting mechanism to cause shifting of the carriage in one direction or the other in accordance with the setting or said ele ment, latch means for maintaining said carriage shifting mechanism in operation after initiation of the operation thereof, and means responsive to said direction control means for rendering said latch means ineffective.
11. In a motor driven calculating machine hav= ing a carriage transversely shiitable to any oi a series of. operating positions, cyclically operable motor driven mechanism operable to shift said carriage between adjacent operating. positions thereof, and division control devices for auto= matically controlling said machine in division computations comprising a manually operable member for initiating the operation, and means for terminating the operation: means for automatically controlling operation of said carriage shifting mechanism as an incident to the com .pletion of said division operation comprising the combination of means controlled by said division terminating means upon operation thereof for initiating operation of said carriage shifting mechanism, said last mentioned means including a settable member movable to a set position by said division terminating means upon operation thereof; spring means for moving said member from set position to interrupt the operation of said carriage shifting mechanism at the conclusion of any cycle of operation thereof, holding means for preventing operation of said spring means, and means controlled by said carriage for releasing said spring means from restraint of said holding means 12. In a motor driven calculating machine having a carriage transversely shiftable to any of a series of operating positions, cyclically operable motor driven mechanism operable to shift said carriage between adjacent operating positions thereoi, and division control devices for automatically controlling said machine in division computation comprising a manually operable member for initiating the operation, and means for terminating the operation; means for automatically controlling operation of said carriage shifting mechanism as'an incident to the com pletion of said division operation including the combination of means controlled by said division terminating means upon operation thereof for initiating operation of said carriage shifting mechanism, said last mentioned means including a settable member movable to a set position by said division terminating means upon operation thereof; spring means tor moving said member from set position to interrupt the operation of said carriage shifting mechanism at the conclusion of any cycle of operation thereof, holding means for preventing operation of said spring means, means selectively adjustable to form a mechanical representation corresponding to any of the respective operating positions of said carriage, and means jointly controlled by the carriage and said selectively adjustable means for releasing said spring means from the restraint of said holding means.
13. In a motor driven calculating machine having a carriage transversely shiftable to any of a series of operating positions, cyclically operable motor driven mechanism reversibly operable to shift said carriage in either direction between adiacent operating positions thereof, means for initiating operation of said carriage shifting mechanism including a connecting member movable to either of two settings to control operation of said carriage shifting mechanism to shift said carriage in either direction, means normally positioning said member in one of said settings to control operation of said carriage shifting mechanism to shift said carriage in one direction, and division control devices for automatically controlling said machine in a division computation comprising a manually operable member for initiating the operation, means for operating said carriage shift initiating means, and means for terminating the division operation; means for automatically controlling operation of said carriage shifting mechanism to shift said carriage in the opposite direction as an incident to said division operation comprising the combination of means for initiating operation of said carriage shifting mechanism to shift-the carriage in the opposite direction including a settable member movable to set position, means including said settable connecting member movable to the other of said settings thereof for moving said settable member to set position, said settable connecting member being movable into the other of said upon operation thereof; spring means for moving said settable member from set position to interrupt the operation of said carriage shifting mechanism at the conclusion of any cycle of operation thereof, holding means for preventing operation of said spring means, and means controlled by said carriage for releasing said spring means from restraint of said holding means.
14. In a motor driven calculating machine having a carriage transversely sbiftable to any of a series of operating positions, cyclically operable motor driven mechanism reversibly operable to shift said carriage in either direction between adjacent operating positions thereof means for initiating operation of the carriage shifting mechanism including a connecting member movable to either of two settings to control operation of said carriage shifting mechanism to shift said carriage in either direction, means normally positioning said member in one of said settings to control operation of said carriage shifting mechanism to shift said carriage in one direction, and division control devices for automatically controlling said machine in its division computation comprising a manually operable member for initiating the operation, means for operating said settings by said division terminating mechanism carriage shift initiating means, and means for terminating the division operation; means for automatically controlling operation of said carriage shifting mechanism to shift said carriage in the opposite direction as an incident to said division operation comprising the combination of means for initiating operation of said carriage shifting mechanism to shift the carriage in opposite direction including a settable member movable to set position, means including said settable connecting member movable to the other of said settings thereof for moving said settable member to set position, said settable connecting member being movable into the other of said settings by said division terminating spring means for moving said settable member from set position to interrupt the operation of said carriage shifting mechanism at the conclusion of any cycle of operation thereof, holding means for preventing operation of said spring means, means selectively adjustable to form a mechanical representation corresponding to any of the respective operating positions of said carriage, and means Jointly controlled by the carriage and said selectively adjustable means for releasing said spring means from the restraint of said holding means.
HAROLD T. AVERY.
US2291133D Calculating machine Expired - Lifetime US2291133A (en)

Publications (1)

Publication Number Publication Date
US2291133A true US2291133A (en) 1942-07-28

Family

ID=3432779

Family Applications (1)

Application Number Title Priority Date Filing Date
US2291133D Expired - Lifetime US2291133A (en) Calculating machine

Country Status (1)

Country Link
US (1) US2291133A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473471A (en) * 1949-06-14 Carriage cushioning means for
US3032262A (en) * 1962-05-01 T avery
US3066864A (en) * 1962-12-04 Calculating machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2473471A (en) * 1949-06-14 Carriage cushioning means for
US3032262A (en) * 1962-05-01 T avery
US3066864A (en) * 1962-12-04 Calculating machine

Similar Documents

Publication Publication Date Title
US2399170A (en) Calculating machine
US2339616A (en) Calculating machine
US2329190A (en) Decimal point indicating mechanism
US2291133A (en) Calculating machine
US1853054A (en) A a morton
US2653763A (en) Dividend aligning mechanism
US1968201A (en) Calculating machine
US2119841A (en) Totalizer engagement control device
US2344627A (en) Computing machine
US2416369A (en) Actuating mechanism for registers
US2333234A (en) Calculating machine
US2809786A (en) Dividend divisor aligning mechanism
US2393019A (en) Automatic counter reverse
US2318241A (en) Calculating machine
US2393018A (en) Automatic counter reverse
US2273237A (en) Register
US2201713A (en) Calculating machine
US2706082A (en) Lydfors
US2309240A (en) Calculating machine
US2400244A (en) Calculating machine
US2335282A (en) Calculating machine
US2304329A (en) Calculating machine
US2327704A (en) Calculating machine
US2992773A (en) Multiplication mechanism for adding machines
US2337091A (en) Calculating machine