US2294083A - Calculating machine - Google Patents

Description

C. M. FRIDEN CALCULATING MACHINE Filed NOV. 14, 1938 Aug. 25, 1942.

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g- 5,, 1942- c. M. FRIDEN CALCULATING MACHINE Filed Nov. 14, 1938 Aug. 25, 1942. c. M. FRIDEN CALCULATING MACHINE Filed Nov. 14, 1958 5 SheetSLsh -t 5 I A TTORNEY mvm. v (a/ l M. Fr/de f Patented Aug. 25, 1942 CALCULATING MACHINE Carl M. Friden, Oakland, Calif., assignor to Friden Calculating Machine 00., Inc., a corporation of California Application November 14,1938, Serial No. 240,269

6 Claims.

This invention relates to calculating machines and is concerned more particularly with .the provision of improved zero resetting mechanism for the registers thereof.

It is an object of the invention to provide an improved calculating machine in which one or more of a plurality of registers can be reset to zero by power operated mechanism.

Another object of the invention is to provide an improved calculating machin in which one or more of a plurality of shiftable registers can be reset to zero by a power operation including shifting of the registers to a predetermined position.

Another object of the invention is to provide an improved calculating machine in which one or more of a plurality of registers can be reset to zero by power operated mechanism having a single starting control key.

Another object of, the invention is to provide improved power-operated normalizing mechanism for the registers of a calculating machine in which the normalizing operation can be' performed selectively on any or all of the registers.

Another object of the invention is to provide a calculating machine having improved means for returning a shiftable carriage to a predetermined position.

Other objects will appear from the following description of a preferred embodiment of the invention, as illustrated by the accompanying drawings, in which:

Fig. l is a fragmentary longitudinal section thru the rear portion of the machine taken in the plane of line l-l in Fig. 3.

Fig. 2 is a sectional elevation of a part of the zero-setting means taken in the plane of line 2-2 in Fig. 1.-

Fig. 3 is a plan view of the machine with certain parts such as the carriage and keyboard omitted, and others shown in section to show the frame and drive construction more clearly.

Fig. '4 is'an elevational view of the shift and resetting controls; I

Fig. 51s an elevational view of the clutch mechanism, certain parts being shown in section.

Fig. 6 is a rear elevational view of the upper part of the machine, with certain parts omitted,

and others shown in section, the plane of the view being indicated by the line 6- B in Fig. 1.

Fig. 7 is a plan view of the right end of the carriage with the cover removed. Certain parts arebroken away and others are shown in section to illustrate details of the construction, the sectionalized portions of the view being taken in planes indicated by the line '!--'i in Fig. 2.

Fig. 8 is a fragmentary sectional elevation of a part of the shift and resetting control means and is taken as indicated by the line 8-8 in Fig. 3.

Fig. 9 is a sectional view through the carriage taken in a plane indicated by the line 93 in Fig. 7.

Fig. 10 is an enlarged sectional view of a resetting control handle.

Fig. 11 is a sectional plan view taken in the plane of line I l-l i in Fig. 10.

Description of mechanism My invention is disclosed as embodied in a calculating machine having an actuator of the universal operation continuous drive cycle type. A complete machine of this type is illustrated in my co-pending application Serial No. 724,482, filed May 8, 1934.

Generally, the machine comprises a frame and a carriage mounted for lateral shifting movement on the frame. The carriage mounts the registers of the machine comprising the accumulator and the revolutions counter, while the frame provides a support for the various mechanisms for controlling the entry of values in the registers. The frame includes base 10 (Fig. 1) which supports casing l I and has left and right side frame plates l2, l3 (Figs. 1 and 3) mounted thereon. Side plates l2, l3 are connected by various cross frame brackets I6, ll, I8 and I9 which serve to mount various mechanisms referred to hereinafter. Register carriage 22 (Fig. 1) is mounted on frame brackets l5 and I9, as by rollers 23, for endwise shifting movement laterally of the machine in either direction to various ordinal positions as controlled by means described hereinafter.

Drive, actuating, and selecting mechanisms The drive mechanism includes a source of power from which a single path of power leads to provide a cyclic clutch-controlled drive for all power driven parts of the machine. The source of power comprises electric motor 26 (Fig. 1)

whose shaft 21 (Figs. 1 and 4) is connected by" 35 carried by transverse shaft 32 journalled in side plates I2 and IS. The cyclic drive for shaft 32 is provided by engagement and dis-engagement of pawl 33 (Fig. 5) with ratchet 3| under the control of clutch control lever 31 pivoted at 38 on side plate l3. The clutch mechanism described generally above is of the construction disclosed in my co-pending application Serial No. 145,979, filed June 2, 1937, but may be of any other suitable construction.

The clutch drives transverse shaft 32 to provide a cyclicuni-directional drive for the actuating means of both the accumulator and the revolutions counter, for the shift mechanism and for the zero resetting mechanism.

Shaft 32 (Figs. 1 and 3) has bevel gear connections 4| with longitudinally extending accumulator actuating shafts 42 suitably journalled in cross brackets l1 and [8. Each shaft 42 carries a .pair of toothed actuating cylinders 43 for a pair of adjacent orders of the machine, and for cooperation with the teeth of each cylinder 43, a pair of ten tooth gears 44 are slidably and nonrotatably mounted on square shaft 45 which is suitably journalled in cross brackets l6, l1 and I8. As usual in this type of machine, a shaft 46 is provided for each order of the actuating means. Gears 44 are selectively positioned with respect to the associated stepped teeth of the actuating cylinder in a conventional manner by means including a pair of differential spring-urged slides 41 associated with each ordinal row of numeral keys 48. Intermediate brackets l6 and I! each shaft 46 is provided with a spool slidably and non-rotatably mounted thereon and having op- !posite bevel gears 52 and '53 for cooperation with numeral wheel gear 54 of the associated order of the accumulator mechanism.

It will be understood that a value correspond- 1 ing to the value of the depressed key can be entered either positively or negatively in the accumulator by selective positioning of plus-minus gears 52, 53 in the conventional manner under control of transversely extending strap 56 which is carried by a pair of similar arms 51 secured on shaft '58, which is suitably journalled in the frame. Strap 56 and the series of plus-minus gears are urged to their central position shown in Fig.- 1 by suitable centralizing means comprising opposed spring-urged arms 59 pivoted on plate I3 and engaging opposite sides of pin 60 on one of arms 51. 1

Accumulator mechanism AccumuZator.--The accumulator comprises a series of numeral wheels 6| (Figs. 1 and 2), each of which is carried at the upper end of a numeral wheel shaft 62 suitably journalled in carriage frame 63 and carrying a numeral wheel gear 54. Each shaft 62 has suitable spring-urged ball and gear centering means 64 to insure alignment of the displayed numeral on wheel 6| with sight opening 65 in the carriage cover.

Tens transfer.-Any suitable conventional form of transfer mechanism may be associated with the accumulator and its actuating means. In the form selected for illustration, the mechanism includes a transfer trip lever 66 (Fig. I) mounted onc'arriage frame 63 in each order of the accumulator, a ten-tooth gear 61 on each of shafts 46 (except the lowest order), and a pair of transfer actuators B8 on each shaft 42. The above mechanism is of the type disclosed in said application Serial No. 724,482 and my co-pending *application Serial No. 75,307, filed April 20, 1936.

Resetting means.--Means are provided in carriage 22 for resetting numeral wheels 6! to zero registration which includes means for restoring any displaced wheels 6| to zero position and means for arresting such wheels positively in zero position. The restoring means includes rack b'ar II (Figs. 1, 2 and 7) mounted for endwise sliding movement in marriage frame 63 adjacent the upper ends of numeral wheel shafts 62. The teeth of rack bar H (Figs. 2 and 7) are cut away at 12 alternately at the top and bottom to form a plurality of separate racks for cooperation with mutilated gears I3 on numeral wheel shafts B2. Adjacent gears 13 are axially offset tocooperate with the adjacent .vertically offset racks formed on rack bar Ii by cut away portions 12 thereof. When rack bar H (Figs. 2 and 3) is in normal inactive position, gears 13 register with :cut away portions," so that numeral wheels 6| can be actuated without interference. If rack bar H is moved to the right as viewed in Fig. 2, the unmutilated parts of gears 13 of any numeral wheels 6| displaced from zero position will'be engaged by the associated racks on bar H and such displaced numeral wheels 6l' are turned until restored to zero'position. Inthis connection it will be noted that any numeral wheelstl in zero position will not be moved byrack bar ll because the-mutilated portions of gears '13 of such numeral wheels face the rack bar. For manual operation rack bar 1| is provided withhandl e 16 (Fig. 2) by means of which bar H can be actuated against the tension of alsuitablesprring (not shown) which'n'ormally maintains bar H in inactive positionh r 1 The movement of bar H to the right as viewed in Fig. 2 to restore any displaced numeral wheels 6| to zero .position also enables the means for arresting wheels 61 in such position. Stop slide 8| (Figs. 1 and 7) is mounted for limited endwise movement on top of carriage frame 63 by suitable pin and slot connections, and is provided with a stop projection 82 (Fig. 7) for each numeral wheel 6|. Each numeral wheel shaft 62 has a stop tooth 83 secured thereon for cooperation with projections 82 in the zero position of the numeral wheels 6|. Slide BI is held normally in inactive position by suitable spring means so that each projection 82 .is out of the path of the associated tooth 83. To provide for movemerit of projections 82 into the path of teeth 83 when zeroizing the numeral wheels, slide 8| is [pivotally connected to bell crank 84 (Fig. 7) having one arm disposed in the path of bar H, so that when bar H is moved to restore numeral wheels 6| to zero position, slide 8| is moved to arrest wheels 6! in such position. I

Thus, the accumulator register can be reset to zero registration manually by manipulation of handle 16. The power operation of the resetting or zeroizing means is described hereinafter. Revolutions counter mechanism Counter and counter ractuator.The revolutions counter which is also mounted in carriage 22 comprises numeral wheels 86 (Figs. 1 and 7) on respective shafts 81, which are journalled in carriage frame 63 and bar 88 supported thereon by suitable end plates 9. A'numeral wheel 86 is provided for each ordinal position of the carriage, and the displayed numeral of each wheel 89 (Fig. 1) is maintained in alignment with the associated sight opening by ball and gear means 89. The number of actuations of the accumulator are registered in counter numeral wheels86 (Fig. 1) by an actuator of conventional construction indicated generally at 9| and driven in a well known manner from transverse shaft 32 by cam cylinder 92 (Fig. 3) and cam disc 93.

Resetting means-Means are provided for 're- Carriage shifting mechanism Means are provided for shifting the carriage in I either direction from one ordinal position to another manually by releasing the carriage for free shifting movement and also by power driven means controlled by manually operable keys. Preferably, the power driven means is driven from the clutch through the actuating means for entering values into the accumulator.

Carriage 22 (Figs. 6 and 7) has plate or rack I II mounted along the rear side thereof by means of adjusting screws I02 threaded in brackets I03 on carriage frame 83 and having smooth ends pivotally engaged with the bent ends of plate III. Plate II has vertical slots I01 formed in the lower edge thereof by teeth I00, slots I 01 being spaced apart av distance equal to the ordinal spacing of the machine and aligned with shafts 46. Slots I01 are adapted for engagement by opposite shift pins III (Figs. 3 and 6) on shift gear 2, which is journalled on frame bracket I6 and is rotated by means described later to effect shifting of the carriage. One half revolution of gear II2 eilects one ordinal spacing of carriage 22 and to provide for accurate centering of the carriage at the end of a shift, centralizing cam III, is mounted for rotation with gear H2, and centralizing arms II4 pivoted on bracket I 6 have suitable rollers at their free ends engaging opposite sides of cam I II tensioned between arms II 4. When pins III are in horizontal alignment the carriage is properly positioned.

The manualrelease of the carriage for free shifting movement is eifected by rocking plate IOI out of engagement with pins III of shift gear II2. Plate IOI is maintained resiliently in operative position by spring IIB (Fig. 7), tensioned between carriage frame 03 and end extension 1' of plate IOI. Carriage release handle II3 (Fig. 7) is joumalled in carriage end plate II 9 in axial alignment with screws I02 forming the pivotal axis for plate II, and has its inner end rigidly but removably connected to the bent end of extension II1 of plate IOI. Thus by turning handle I I0, plate IOI canbe moved out of engagement with pins I I I to-permit free shifting movement of the carriage.

Resilient bumper means is provided for preventing shifting of the carriage beyond its left end position, to which it is usually returned to begin a calculation. Bumper lever I2I (Fig. 6) is pivoted at I22'on bracket I6 and has its upper end positioned for engagement. with the head .of adjusting screw I02 when the carriage is in its left end position, (to the right as viewedin Fig. 6). The lower end of lever I2I is notched for engagement by the noseof spring-urged centering arm I24 which maintains bumper'lever I2L resiliently in the position shown. The movement of lever I 2| when struck by screw I02 is limited by the engagement of abutment I26 thereof with the top of frame plate I2.

I3 under the influence of spring Yieldable means are provided to prevent attempted shiftlng of the register carriage beyond the lowest and highest ordinal positions thereof during power operation of the shifting means.

End slots I01 are formed in part by end teeth I00 and in part by respective pawls I3I, I32 which are pivoted at I33, I34, respectively on plate IN and extend inwardly to position the straight end edges thereof opposite end teeth I08 to form end slots I01. Pawls I3I, I32 are held resiliently in the position shown against stop pills I 35 by spring I36, connected therebetween. When carriage 22 is in the end position. shown in Fig. 6, one pin I I I lies in an end slot I01 and the other is positioned beneath adjacent.pawl I3I in engagement with a cam edge thereof. In this condition rotation of shift gear I02 and pins III in a direction to move the carriage beyond the end position merely re- 1 sults in oscillating pawl I3I. tation of gear H2 in a direction to elfect carriage shifting to an intermediate ordinal position, the end edge of pawl I3I positively resists the pin III in end slot I01 and carriage shifting results. A similar action occurs if the carriage is in its other endposition to place shift gear I I2 adjacent pawl I32. It is seen, therefore, that the carriage cannot be shifted beyond either end position thereof by operation of shift gear I I2. The oscillation of pawl I3I is used in a manner described hereinafter to control stopping of the machine in carriage shifting operations after the carriage has entered the adjacent end position.

As stated above, shift gear II2 is-rotatable in either direction by selectively operable drive connections with the actuating means of the machine. For this purpose, the two lowest order actuating shafts 42 (Fig. 3) are extended rearwardly and have respective collars I43 secured adjacent the ends thereof. provided with opposite slots slidably engaged by corresponding teeth I 42 of a shiftable drive establishing collar I mounted freely on the end of shaft 42. Opposite teeth I42 thereof, each collar I has smaller teeth I44 adapted for engagement with corresponding slots in respective gear sleeves I46, I41, which are journalled in frame bracket I6 and small plate I48 mounted on member I 6 by suitable spacers and fastening screws. Gear sleeve I46 (Figs. 3 and 6) has gear I5I meshing with idler gear I52 .(Fig. 6) Journailed in bracket I6 and plate I48 and meshing with shift gear II2. Gear sleeve I41 (Figs. 3 and 6) has gear I53 (Fig. 6) offset axially from idler gear I52 and meshing with wide reverse idler gear I54 suitably journalledin bracket I6 and plate I40 and also meshing with idler gear Thus, rotation of gear sleeve I46 in a However, upon roclockwise direction as viewed in Fig. 6 causes clockwise rotation of shift of carriage 22 to the left as viewed from the front of the machine Correspondingly, rotation of gear sleeve I41 in a clockwise direction as viewed gear H2 and shifting in Fig. 6 effects counter clockwise rotation of shift gear 2 and shifting of carriage 22 to the right as viewed from the frontof the machine. Thus, by selective establishing of drive connections between gear sleeves I 46, I41 (Fig. 3) and collars I43 upon selective shifting of respective shiftable collars I4I, carriage 22 can be shifted in either direction. The gear ratios are so chosen that one rotation of actuating shafts 42 effects one-half rotation of shift gear II2.

Manually operable control means are provided for the carriage shifting mechanism described above to enable selective shifting of the carriage Each collar m is I the front of the machine. Depression of either key serves to enable a drive connection from the actuating means to the carriage shifting mechanism during the first part of its downward movement and thereafter to engage the clutch and energize the motor. Keys I6I, I62 (Fig. 4) are mounted for endwise movement by suitable longitudinal slots formed therein and engaged by a plurality of studs I63 secured on frame plate I3. Keys I6I, I62 have adjacent ears I66 with respective studs I91, I68 mounted therein and extending to either side thereof. To maintain the shift keys resiliently in raised position, coil spring III (Fig. 8) is provided having its end fastened to side plate I3 and passing over upper studs I63 and under the ends of studs ISI, I99 which extend through suitable slots in side plate I3.

To enable the drive connection from the actuating means to the carriage shifting mechanism upon depression of shift key ISI, stud I6? (Fig. 8) engages the upper end of arm I72 secured on sleeve I12 (Figs. 3 and 8). Sleeve H3 is journalled on transverse shaft II l which is suitably journalled at its ends inside plate I3 and bracket IIt on cross bracket I8. At its left end, sleeve I73 is provided with depending arm Ill (Fig. 8) having its rounded end in engagement with the front end of rearwardly extending rod I39 (Figs. 3 and 8). Rod I719 is mounted for sliding movement in cross brackets II, It and is resiliently urged to its forward position by spring I79 compressed between cross member I9 and 9, suitable washer on rod IIB. At its rear end, rod I19 (Figs. 3 and 6) has shift fork I9I secured thereon with its forked end in engagement with an annular groove in right-hand shiftable collar MI. From the foregoing description, it is seen that depression of key IEI is eflective through stud IE'I to rock arm H2, sleeve IItl and arm III to move rod I'It rearwardly.

Such rearward movement of rod I-IB isefiective through-shift fork ItI to engage teeth I66 of right-hand shift collar II with corresponding slots in gear sleeve Idl. Thus, initial depression of shift key ISI is effective to enable a drive connection from the actuating means to the carriage shifting mechanism, and to. determine shifting of the carriage to the right.

A similar mechanism is employed in connection with shift key I62 to enable the drive connection to'determine shifting "of the carriage to the left. Stud I69 (Fig. 8) 'is engaged with the upper end keys I vide means for shifting of arm I95 having its hub secured on shaft Il l.

' lit its left end, shaft II i (Fig. 3) has depending arm I8I (similar to arm II'I) secured thereon in operative relation with shift rod I89 having shift fork I89 at its rear end in engagement with an annular groove in left-hand shift collar IIII. It is seen, therefore, that depression of key I92 results in rocking of shaft I14 and rearward movement of rod I88 to engage left-hand shift collar MI with gear sleeve I96.- This conditions the carriage shift mechanism for shifting of the carriage to the left. It is to be noted that only a small amount of movement is required to engage teeth I gear sleeves is enabled during the first part movement of keys I6I, I62.

The latter part of the downward movement I96, It! so that the drive connection of the downward M with the corresponding slots in 70 ablemeans on lever I92 pivoted on side plate I3.

From the relation of studs I61, use and lever I9I, it is evident that depression of either of keys I6I, I62 is effective during the latter part of the movement to rock levers I9I, I92 in a clockwise direction. Lever I92 is connected at its upper end by link I93 (Figs. 4 and 5) with clutch control lever 31! so that movement of link I93 and lever 31 will result upon depression of either of the shift keys. Such movement is effective in the manner previously described to engage the clutch. The motor is energized upon oscillation of lever I92 (Fig. 4) which has a pin and slot connection with lever I99 having pin I95 mounted adjacent contacts I96 of the motor circuit.

Suitable means of conventional construction are provided for maintaining the drive connection from the actuating means to the carriage shifting mechanism throughout each cycle of movement even though the depressed shift key be released immediately after depression thereofand before complete shifting of the carriage. For this purpoce each shiftable collar MI is provided with a similar mechanism, one of which will be described generally. Right-hand shiftable collar I II (Figs. 3 and 6) is provided with disc I91! having a cut away portion which, in

the full cycle position of collar III is in the position illustrated in Fig. 6.

Immediately to the rear of disc I9l, locking element I99 is provided mounted in bracket I99 for movement radially of collar MM, and urged to its extended position by spring 290. With shiftable collar MI in its inactive position disc I97 is positioned forwardly of locking element I99 which is aligned with the cut away portion of disc I97. When collar MI is shifted rearwardly of the machine to its active position it passes by element I98 and upon subsequent rotation of disc I91, the solid portion thereof engages element I98 and prevents movement of dollar MI forwardly of the machine so that teeth M9 are maintained in engagement with gear sleeve I'i for one or more complete revolutions or cycles irrespective of release of the associated shift key before the end of a cycle. Left hand shiftable'collar MI is held in drive establishing position for each cycle of rotation by similar mechanism.

From the foregoing description it is seen that BI, I62 and the associated mechanism prothe carriage selectively in either direction from one ordinal position of the carriage to another. As will now be described, the shift mechanism is utilized in normalizing the machine after a calculating operation.-

N ormalizing mechanism J either the accumulator or the revolutions counter or both of these registers, as determined by settable control means, the operation being carried out by power driven means undercontrol of a manually operableregister return and resetting key.

Return and resetting key ZBI (Fig. 4) isoperative upon depression thereof to establish a drive connection between the power driven resetting mechanism and the actuating means and to initiate a carriage shifting operation. Key 2M is latched in depressed position until the carriage return and resetting operations are completed when the latch is automatically released. Key is mounted on side plate !3 adjacent shift key I62 for substantially endwise movement. For this purpose, key 28! is slotted adjacent its upper end for engagement by stud 202 and at its lower end is pivotally connected at 203 to arm 264 (Figs. 4 and 8) on shaft 2!l6. Key 2!!! is urged to its raised position by spring 281 (Fig. 8) secured to extension 263 ofv arm 284. Intermediate its ends, key 20! (Fig. 4) is provided with latching notch 2!! for cooperation with latching slide 2!2. In the 'raised position of key 26!, slide 2!2 has its nose engaged with cam surface 2!3 on key 28! below notch 2!!. Slide 2!2 is mounted for endwise sliding movement by means of pin 2!4 engaging a slot at the front end of slide 2!2 and by a pivotal connection at its rear end with latch releasing member 2!6 referred to hereinafter. Spring 2!1 tensioncd between a pin on side plate !3 and the rear end of slide 2!2 urges slide 2!2 to active position so that upon depression of key 26!, slide 2!2 will engage latching notch 2!! and maintain key 2!)! in depressed position until slide 2!2 is retracted by.

means described hereinafter.

To initiate the carriage return determined by depression of key 28!, shoulder 22!! (Fig. 4) on key 26! overlies lug 22! of shift key I62, so that the shift key is depressed with key 20! and will also be latched in depressed position as described above. It will be recalled thatdepression of shift key !62 serves to engage the clutch and enable the motor circuit so that the machine drive will start.

Before the drive starts, however, the depression of key 2!!! serves to enable the drive connection from the actuating means to the zero resetting drive means mounted on the frame of the machine. For this purpose, shaft 286 (Figs. 1 and 3) which is rocked upon depression of key 28! carries arm 226 having its cam end 221 operatively related to rod 228 slidably mounted in brackets !1 and I8 and normally positioned as shown in Fig. 1 by spring 229. At its rearward end, rod 228 carries fork 23! operatively engaged with shiftable toothed collar 232 similar to collars !4! of the shift mechanism and similarly mounted on one of actuating shafts 42.. Teeth 233 of collar 232 are engageable withthe slotted end of sleeve 234 (Figs. 1, 3 and 6) suitably journalled in bracket !6 and plate 236 securedthereon. Sleeve 234 (Fig. 6) carries cam 231 which is engaged by roller 238 on arm 239 pivoted at 24! on bracket 6 and urged toward cam 231 by spring 242.

The upper end of arm 239 (Figs. 1 and 6) is slotted to engage roller 243 suitably journalled on slide 246 mounted for endwise movement on bracket !6 by small brackets 241. Slide 246 has laterally bent actuating extension 248, and when carriage 22 is in its left end position as illustrated in Fig. 6, extension 248, is in operative relation with arm 249 pivoted at 250 on bracket 25! depending from a resetting drive member comprising slide 252. Slide 252 has an L-shaped cross section and is mounted for endwise sliding movement on carriage frame 63 by spaced studs 253. As described later,.reciprocation of 256 is adapted to cooperate with fixed ledge 259 mounted on bracket !6 to lift arm 249 out of the path of extension 248 during movement of the cariage into its end position. Spring 258 also urges arm 249 to the position shown with pin 26! engaged with a surface of carriage frame 63. With the parts positioned as illustrated in'Fig. 6, it is seen that upon movement of slide 246 to the left, lateral extension 248 will engage the end of arm 249 to reciprocate resetting drive slide 252. The reciprocation of slide 252 is effected in the first cycle during which the carriage is in the end position shown in Fig. 6.

Slide 252 (Figs. 6, 7, and 9) may be operatively related to either or both of resetting rack bars 1! and 94 by the adjustment of settable control means to adjust the connections therebetween. For thispurpose one end of slide 252 is provided with lateral extension 262. (Figs. 7 and 9) projecting transversely of bars 1! and 94 and provided with rspective pins 263 and 264 providing abutments for driving the rack bars. Preferably, the settable control means for engagement with pins 263 and 264 comprise the operating handles 16 and 98 for bars 1! and 94 and as these are of generally similar construction only one will be described in detail. Handle 16 (Figs. 9-11) comprises post 21! secured in upright position at one end of rack bar 1! and having its upper end of reduced diameter. Connecting arm 212 (Figs. 10 and 11) has its hub 213 pivoted on post 21! and at its end has seat 214 for engagement with pin 263 as shown in full lines in Fig. 11. Hub 213 is notched to receive teeth 216 of sleeve 211 which is pressed in knurled handle 218,.all of the parts being held on post 21! by screw 219 threaded in the upper end of the post, and being urged downwardly by spring 28! compressed between screw 219 and sleeve 211.

Resilient latch means is provided for locating handle an and arm212 in either of the air justed positions shown in Fig. 11. For this purpose arm 212 is provided on its lower surface with anguiarly" spaced radial grooves 282 for cooperation under the influence of spring 28! with pin 283 extending thru post 21!. To indicate visually its adjustedposition handle 218 may be provided with index 284.

Handle 98 is similarly constructed being provided with connecting arm 285 mounted on post 286. and having adjusting handle 281. Roller 288 is journalled on post 286 for engagement in flanged groove 289 of strap brace 290 secured between carriage frame 63 and bar 88, whereby an additional bearing is provided to guide the movement of rack bar 94'.

From the foregoing it is seen that by selective adjustment of connecting arms 212 and 285, operation of either or both of rack bars .1! and 94 by slide 252 can be predetermined, so that th the accumulator or the revolutions counter, or either of them, will be reset to zero upon depression of key 26!.

It will be recalled that key 20! is latchedin depressed position during shifting of the carriage to its end position, if displaced therefrom, and means is provided to release the latch during the first cycle of operation of the actuating means when in said end position.

To eifect the latch release, pawl !3! (Fig. 6)

has arm 29! terminating in shoulder 292 and latch releasing extension 293. Extension 293 overlies cam arm 294 (Fig. 4) of latch releasing bell crank 2!6 which i pivoted at 296 on side plate !3.

It will be recalled thitjwith the cara rlage in the end position shown in Fig. 6, pawl l3l is oscillated during each cycle of operation of the actuating means by the pin iii engaged therewith. As arm 29l' of pawl I3l moves down-- wardly shoulder 292 moves into operative engagement with side plat l3 and extension 293 contacts cam end 294 (Fig. 3). The engagement of shoulder 292 with plate i3 blocks unnecessary movement of the carriage because of the actuation of either of resetting bars H or 7 As a preliminary to the operation of the normalizing mechanisms, handles 278 and 2d? must be adjusted in accordance with the desired resetting operations to be performed. Assuming that it is desired to reset both the accumulator and the counter handles 213 and it'll are adjusted as shown in Fig. '1 with connecting arms 212 and 2th operatively engaged with pins 268 and 2651 on slide 252. Withthe parts properly adjusted, key 2% is depressed to initiate the normalizing operation. Return and reset key 2M (Fig. i) when depressed is latched in depressed position by slide 2E2 until it is released as described hereinafter. The depression of key 2M thru arm 2% (Fig. 3), shaft 2% (Figs. 1 and 3) and arm 226 moves rod 228 rearwardlyto engage shiftable collar 232 with cam hub 23b. The drive connection for the zero resetting drive member is therefore established.

Depression of key 29! (Fig. 4) thru shoulder 22% and lug 22! also depresses shift key 32 to enable the carriage shifting mechanism for shifting the carriage to the left. Such depression of shift key I62 engages the clutch and enables the motor circuit. If the carriage is positioned in its left end or lowest order position as viewed from the front of the machine, depression of shift key use merely serves to enable the drive for one cycle of operation. 'During this cycle, slide 2 36 (Fig. 6) actuates drive member or slide 252 which thru connecting arms 212 and 285 operates resetting bars ii and W to restore numeral wheels 68 and 8'5 to zero registration, and a pin iii (Fig. 6) oscillates pawl E36 to actuate latch releasing member tit to unlatch key 2M and there= by shift key H62. However, if the carriage is displaced from such left end position, shifting of the carriage to the left (as viewed from the front or the machine or to the right as viewed in Fig. 6) follows as well as reciprocation of arm 23% and slide 2%. The reciprocation of slide 268 is ineffective until the carriage is returned to its left end position because arm 2% is not engaged by extension 258 of slide 2 3% until shifting of the carriage is completed. This action is provided by the engagement of pawl fist-"with ledge 25!! so that arm 2&9 is lifted during the portion of the carriage travel when premature actuation of arm 2449 could occur.

During the last part of the last shifting cycle, arm 2% drops to active position so that'the next reciprocation of slide 2446 is effective to engage extension 248 with arm 2 59 and effect the resetting operation. Also, during this cycle, pawl iii is oscillated to actuate latch releasing meniber tit and release key 20! so that key 2M and 7 means cooperatively of the carriage to its left endposition, selective resetting of either or both of the accumulator and the revolutions counter and release of key 2M.

It will be seen that the above described mechanism'can also be employed for returning the carriage to its left end position without resetting either of the registers If this operation is desired, connecting arms 212 and 285 are bothadjusted out of operative relation with studs 258 and 26 3. Key 2M will then operate as a carriage return key, and the reciprocation of slide 252 is idle.

I therefore claim as my invention:

1. In a calculating machine, a series of numeral wheels, a resetting member movable to reset said numeral wheels to zero registration, a manually operable handle on said resetting memher, a second series of numeral wheels, a second resetting member movable to reset said second series of numeral wheels to zero registration, a

manually operable handle on said second resetting member, an operating member for selective cooperation with said resetting members to effect resetting movement thereof, and an adjustable connection between each of said reseta series of numeral wheels mounted in said frame,

zero resetting means for said numeral wheels including a rack mounted for endwise movement on said frame, a manually operable handle on said rack, an operating slide mounted for endwise movement on said frame, and adjustable means carried by said handle for connecting said rack to said slide for operation thereby.

3. In a. calculating machine, a register frame. a series of numeral wheels mounted in said frame, zero resetting means for said numeral wheels including a rack mounted for endwise movement on said frame, a manually operable handle on said rack, an operating slide mounted for endwise movement on said frame, said handle, including a sleeve mounted for rotative adjustment, an abutment on said slide, and an arm movable by said sleeve into and out of operative relation with said abutment.

4. In a calculating machine, a frame, a carriage mounted for endwise shifting movement on said frame, means for shifting said carriage, a plurality of registers on said carriage, zero resetting means on said carriage for each of said registers, a drive member on said carriage, means for selectively connecting said drive member with any one or all of said resetting means, a drive element on said frame foroperating said drive member in one position of said carriage, and control means for determining shifting of said carriage into said one position if displaced therefrom and for enabling the drive for said drive element.

5. In a calculating machine, a frame, a carriage mounted for endwise shifting movement on' said frame, a plurality of registers on said carriage, zero resetting means for each of said regis resetting means for simultaneously initiating operation thereof, and settable means for determining operation of any one or all of said resetting means. I

6. ma calculating machine, a frame, a carriage mounted for endwise shifting movement on said frame, a plurality of registers on said carriage, zero resetting means for each of said registers, means for shifting said carriage, and control means cooperativelyrelated to said shifting and resetting means for controlling a combined operation thereof, said control'means including a manually operable key and means invariably responsive to depression of said key for causing return of said carriage to an end position thereof, said control means also including a settable element operatively related to each of said resetting means for selectively controlling operation of the associated resetting means in combination with the return of said carriage.

CARL M. FRIDEN.

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