US2343241A - Calculating machine - Google Patents

Description

March 7, 1944. J. L. MOODY 2,343,241

GALCULATING MACHINE Filed July 23, 1958 6 Sheets-Sheet 1 March 7, 1944. J. L. MOODY cALcuLATING MACHINE Filed July 23, 1958 6 SheetS-Sheei'l 2 Sm Rm INVENTO Joh/7 l. /11//0004/ BY @,4/ X4@ i ATTORNEY March 7, 1944. J. L. MOODY CALCULATING MACHINE Filed July 25, 1938 6 Sheets-Sheet 3 dy ya? ATTORNEY INVENTOR. Joh/7 M00 BY @7 Z441@ March 7, 1944. J. L. MooDY CALCULATING MACHINE Filed July 25, 193B 6 Sheets-Sheet 4 Nm Mmm M QM l INVENToR'. ./o/m Z Moody BVG) fw/fw d@ A TTORNEY March 7, 1944. J. 1 MooDY CALCULATING MACHINE Filed July 23, 1938 6 Sheets-Sheet 5 www NR @NN SQ QN NNN .Il wlnmHrfnH.

A TTORNEY INVENTOR. Job/7 Moody March 7, 1944. J. L. MooDY CALCULATING MACHINE e sheets-sheet e F'iled AJuly 25, 1938 INVENTOR.

./0/7/7 Moody BVG@ ATTORNEY Patented Mar. 7, 1944 UNITED STNI'ES PATENT GFFICE CALCULATING MACHINE John L. Moody, Oakland, Calif., assignor to Friden Calculating Machine Co., Inc., a corporation of `I'Jalifornia.

Application July 23, 1938, Serial No. 220,982

13 Claims. (Cl. 23S- 63) operation of such mechanism or any portionv thereof.

Another object of the invention is to provide an improved calculating machine in which the drive is interrupted after shifting of the carriage into a predetermined position irrespective of continued depression of the control key by the operator to prevent useless overdrive of the shifting mechanism.

,Another object of the invention is to provide improved accumulator shifting and resetting control means for a calculating machine in which the shiftable carriage is utilized in controlling the operation of the machine in accordance with the ordinally shifted position thereof.

Another object of the invention is to provide improved control means for a calculating machine which prevents misoperation of the machine, and provides against useless engagement of the drive when the tcontrol means is held in operative position after the completion of the operation controlled thereby.

Other objects will appear from the following description of a preferred embodiment of the invention as illustrated in the accompanying drawings.

Description of figures Fig. 1 is a vertical, longitudinal section of the rear part of the machine taken in a plane thru the axis of .the actuating means of one order of machine as indicated by the line II in Fig. 4. Fig. 2 is a fragmentary elevational View of the `accumulator resetting means `as indicated by the with certain parts shown in section.

Fig. 5 is an elevational view if the right side frame plate and the operating controls mounted thereon as indicated by the line 5 5 in Fig. 4. The register carriage is shown diagrammatically,

Fig. 6 is a fragmentary sectional view illustrating the clutch construction, and is taken as indicated by the line 6-6 in Fig. 4.

Fig. 7 is a rear elevational View of the machine and the carriage taken as indicated by the line 'I-'I in Fig. 1.

Fig. 8 is a bottom plan view of the right end of the carriage.

Fig. 9 is a perspective view of the full cycle control mechanism of the carriage shifting means;

Fig. 10 is a sectional elevation of the controls for the carriage shift and carriage return and resetting means as indicated by line ID-IU in Fig. 4.

Fig. l1 is a fragmentary plan view of the right side of machine with key sections and carriage removed.

Fig. 12 is a rear elevation of the upper part of the machine similar to Fig. '7 but with the carriage shown in its opposite end position.

Fig. 13 is a fragmentary sectional View of a part of the resetting control means, and is taken in the plane of the line I3-I3 in Fig. 4.

Fig. 14 is similar to Fig. 13 but shows the parts as conditioned at the end of a resetting operation.

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 the Patent of Carl M. Friden, No. 2,229,889. 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 entering values in the registers. The frame includes base I0 (Fig. l) which supports casing Il and has left and right side frame plates I2, I3 (Figs. 1 and 4) mounted thereon. Side plates I2, I3 are connected by various cross frame brackets I6, I1, I8 and I9 which serve to mount various mechanisms referred to hereinafter. Register carriage 22 (Fig. 1) is mounted on frame brackets I6 and I9, as by rollers 23, for endyvise shifting movement laterally of the machine in either direction to various ordinal positions as controlled by means described hereinafter.

.carriage frame 3l formed by a. pair of opposite U-Shaped members which are secured together by suitable fastening means such as screws. Similar end plates 34 (Figs. 7 and 8) are secured to the 'ends of frame 3| and support cross member 36 (Figs. 1 and 8) in spaced relation from'frame 3|. The accumulator comprises numeral wheels 4| (Fig. 1) secured at the upper ends of numeral Wheel shafts 42 journalled in ordinally spaced relation in carriage frame 3|. The numeral displayed by each whee1f4| (Fig. l) is maintained in alignment with corresponding sight opening 43 by suitable ball and gear aligning and .overthrow preventing means 44. To transmit increments of 'value to numera1 wheels 4|, each shaft 42 extends below carriage frame 3| and has ten-tooth numeral wheel gear 46 which is actuated by means described later.`

Accumulator resetting means racks for cooperation with mutilated gears 53 onV numeral wheel shafts 42. Adjacent gears 53 are axially offset to cooperate with the adjacent ver. tically offset racks formed on rack bar 5l by cut away portions 62 thereof.

When-rack bar (Figs. 1-3) is in normal inactive position, gears 53 register with cut away Portions 02 so that numeral wheels 4| can be actuated without interference. Ii' rack bar 5| is moved to the right as viewed in Fig. 2, the unniutilated parts of gears 53 of any numeral wheels 4| displaced from zero position will be engaged by the associated racks on bar 6| and such dis-4 placed numeral wheels 4| are turned until restored to zero position. In this connection it will be noted that any numeral wheels 4| in zero position will not be moved by rack bar 5| because the mutilated portions of gearsl 63 of such numeral wheels face the rack bar. For manual operation rack bar 6| provided with handle 56 (Fig. 1) by means of which bar 5| can be actuated against the tension of a suitable spring (not shown) which normally maintains bar 5| in inactive position.

The movement of bar 5| to the right as viewed in Fig. 2 to restore any displaced numeral wheels 4| to zero position also enables the means for arresting wheels 4| in such position. Stop slide 6| (Figs. 1 and 3) is mounted forf'limited endwise movement on top of carriage frame 3| by suitable pin and slot connections, and is provided with a stop projection 62 (Fig. 3). for each numeral wheel 4|. Each numeral wheel shaft 42 has a stop tooth 63 secured thereon for cooperation with projections 62 in the zero position of numeral wheels 4|. vSlide 6| is held normally in inactive position by suitable spring means 60 (Fig. 1'2) so each projection 62 is out of the path of the associated tooth 63. To provide for movement of projections 62 into path of teeth 63 when zeroizing the numeral wheels, slide 6| may be connected in any convenientmanner to bar 5|, so

y that when barl 5| is moved to restore numeral wheels 4| to zero position, slide 6|is/ moved to arrest wheels 4| in such position.

Thus, the accumulator register can be reset to zero registration manually by manipulation of handle 56. The power operation of the resetting or zeroizing means is described hereinafter.

Revolutions counter and resetting means therefor.

The revolutions counter which is also carried by carriage 22 comprises numeral wheels 1| (Figs- 1 and 8) on respective shafts 12 which are'jour.- nailed in carriage frame member 3| and cross member 36. A numeral wheel 1| is provided for each. ordinal position of the carriage, and the displayed numeral of each wheel 1| (Fig. 1) is maintained in alignment with the associated s'ight opening 13 by ball and gear means 14.

Means are provided for resetting numeral wheel 1| (Figs. 1 and 8) of the counting lregister tol zero, which is similar in construction and operation t0 that described in connection with accumulator wheels 4|, and may include manually operable rack bar 15 and stop slide 16 suitably mounted in the carriage for cooperation with mutilated gears 11, and stop teeth 18 on shafts 12, If desired, the rack bar 'l5 may be. coupled to the bar 6l of the accumulator as shown in the. (2o-pending application of Carl M. Friden, serial No. 42,268, led September 26, 1935, now Patent No..2,310,281, dated February 9, 1943.

f -From the foregoing description, it is seen that the shiftable register carriage prow'des a mountving for both the accumulator and revolutions counter, which are, therefore, shiftable with respect to the actuating means therefor which are mounted in the frame of the machine. Also, each register is provided with zeroizing means shiftable with the carriage. The actuating means and the associated driving and value selecting mechanisms for the registers will now be described briefly as they are generally similar to those described in said application.

Selecting v:and actuating mechanisms The values to be introduced into 'accumulator numeral wheels 4| are selected by means of a plurality of banks or orders of settable value keys |0|, one of which banks is illustrated in part in Fig. 1. Each bank of` keys I0| cooperates with selecting mechanism including a pair of par.. allel spring-urged slides |02 mounted for endwise movement to position gearsv |03 selectively lwith respect to stepped teeth |04 of the associated actuating cylinder 06 in accordance with the value of the depressed key. One gear |03 of each ordinal pair and the associated slide |02 cooperate with value keys |0| from "1" to "5 and the left hand set of teeth |04 on the associated cylinder |06 as viewed in Fig. 1, while the other gear |03 and slide |02 cooperate with value keys |0| from 6v to 9 and the right hand set of .teeth |04 on such eyunder.

Cylinders |06 (Figs. 1 and 4) are mounted on actuating shafts |01 having suitable bevel gear connections with transverseshaft |08 which is suitably journalled in side plates I2, I3. Each shaft |01 serves for two orders of the machine and has a pair of cylinders, |06 mounted thereon. Shaft |08|and shafts |01 are driven cycli- Cally from motor |09. (Fig. 1) thl'uclutch III (Figs. 4 and 6) which is driven by suitable gearlever ||1 pivoted on side plate I3 determines engagement or disengagement of the clutch by releasing or engaging the nose of dog ||4 in the full cycle position thereof.

From the above description, it is lseen that the values set in the machine by depression of keys ||l| will be entered in numeral wheels 4| by the cooperation of gears |03 with teeth |04 of cylinders ||l6 during cyclic operation of the clutch. Each pair of gears |63 is slidably mounted on a square shaft |2| (Fig. 1) supported in cross frame brackets I1, I8 and extending rearwardly of the' machine thru cross member |1 and ha'ving its rear end journalled in cross frame bracket I6. Intermediate brackets I6, |1, a spool |22 is slidably and non-rotatably mounted on each shaft |2| and has opposite bevel gears |23, |24 at its ends positioned for cooperation `with vnnnreral wheel gear 46. Therefore, when one or the other set of gears |23, |24 is engaged with gears 46, numeralwheels 4| will be rotated forwardly or reversely to register a number of increments equal to the value of the depressed keys |0| in the aligned bank of keys.

To control the engagement of gears |23, |24 (Fig. 1) with gears 46, strap |25 is positioned between gears |23, |24 and is mounted by suitable arms |20 for rocking movement with shaft |26. Thus, by rocking shaft |26 either set of gears |23, |24 can be moved on shafts |2I by strap |25 from the position shown in Fig. 1 into engagement with gears 46. Gears |23 transmit positive increments and gears |24 transmit negative increments. Any suitable control means can be provided for controlling the position-of shafty |26 z and gears |23, |24 and for simultaneously enabling the drive -through clutch asfor example, the plus and minus keys of the character disclosed in said patent.

Suitable spring-urged centralizing means are provided for maintaining shaft |26, strap |25 and gears |23, |24 in their central neutral position.

Such means may comprise opposed centralizing' arms |21 (Fig. 1) having respective pivotal sup# ports |28 on side plate |2 and inter-connected by' spring |29 so as to be urged against stop |30 on plate I2. The upper -ends of centralizing arms |21 are bent inwardly for cooperative engagement with pin |3| carried by one of arms |20, so that arms |21 yieldably resist movement of gears |23 and |24 from their neutral position, and serve to return them thereto after a calculating operation.

Transferred increments in the accumulator are entered through gears |23, |24 (Fig. l) by means of trip levers |32 (Figs. 1 and 8), transfer actuators |33 on shafts |01 and gears |34 on shafts |2| in a conventional manner as fully disclosed in said patent. y

'I'he number of actuations of accumulator numeral wheels 4| are registered either positively or negatively in counting numeral wheels 1| by actuator |36 (Fig. l) which is driven and operated in a manner fully described in said application to enter single increments in the active order of the revolutions counter and to carry from order to order in higher orders thereof.

Carriage shifting mechanism Means are provided for shifting the carriage in 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, and the clutch is disengaged automatically when the carria-ge has been shiftedv to either end position thereof.

Carriage 22 (Figs. '1 and 8) has plate |5| mounted along the rear side thereof by means of adjusting screws |52 threaded in brackets |53 on carriage Aframe 3| and having smooth ends pivotally engaged with laterally projecting end portions |54 of plate |5I. Plate I5| has vertical slots |51 formed in the lower edge thereof by teeth |58, slots |61 being spaced apart a distance equal to the ordinal spacing of the machine and aligned with drive shafts |21. Slots |51 are adapted for engagement by opposite shift pins |6| (Figs. 4 and '1) on shift gear |62, 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 |62 effects one ordinal spacing of carriage 22 and to provide for accurate centering of the carriage at the end of a shift, centralizing cam |63, is mounted for rotation with gear |62. Centralizing arms |64 suitably pivoted at one end on frame member |6 having suitable rollers at their opposite ends` engaging opposite sides of cam |63 under the influence of spring l|65 tensioned between arms |64. When pins |6| are in horizontal alignment the carriage is properly positioned and the centralizing rollers are seated in opposite depressions formed between the high portions of cam |63.

The manual release of the carriage for free shifting movement is effected by rocking plate |5| out of engagement with pins |6| of shift gear |62. Plate |5| is maintained resiliently in operative position by spring |66 (Fig. 8) tensioned between carriage frame 3| and end extension |6 1`of plate |5|. Carriage release handle |63 (Fig. 7) is journalled on carriage end plate 34 in axial alignment with screws |52 forming the pivotal axis for plate |5|, and has its inner end rigidly but removably connected to the bent end of extension |61 of plate |5|. Thus by turning handle |68, plate |5| can be moved out of engagement with pins |6| to permit free shifting movement of the carriage.

Resilient bumper means is provided for preventing shifting of the carriage beyond its end positions, rto one of which it is usually returned to begin a calculation. Bumper lever I1| (Fig. '7) is pivoted at |12 on frame bracket I6 and has its upper end positioned for engagement with the head of adjusting screw 52 when the carriage is in its left end position, (to the right as viewed in Fig. 7) and with stop lug |13 (Fig. 12) when in its other end position. The lower end of lever |1| is notched for engagement by the nose of spring-urged centering arm |14 which maintains bumper lever- |1| resiliently in the position shown. The movement of lever |1| when struck by screw |52 is limited by the engagement of abutment |16 thereof with the top of left side frame plate I2, and when struck bylug |13, by tlzie engagement of its lower end with side plate Yieldable means are provided to prevent attempted shifting of the register carriage beyond the lowest and highest ordinal positions thereof during power operation of the shifting means. End slots |51 are formed in part by end teeth |58 and in part by respective pawls |8I, |32. Pawls I8|, |82 are pivoted at |83, |84, respectively on plate |5| and extend yiwardly to position the straight end edges threof opposite end teeth |58 to form end slots |51. Pawls |8 |82 are held resiliently in the position shown against stop pins |85 by respective springs |86, |81 associated therewith. When carriage 22 is in the end position shown in Fig. '7, one pin |6| lies in an end slot |51 and the other is positioned beneath adjacent pawl |82 in engagement with a cam ledge thereof. In this 'condition rotation of shift gear |62 and pins |6I in a direction to move the carriage beyond the end position merely results in oscillating pawl |82. However, upon rotation of gear A|62 in a direction to eiect carriage shifting to an intermediate ordinal position, the end edge of pawl |82 positively resists the pin A|6I in end slot |51 and carriage shifting results. A similar action occurs if the carriage is in its other end position to place shift gear |62 adjacent pawl |8| as shown in Fig. 12. It is seen, therefore, that the carriage cannot be shifted beyond either end position thereof by operation of shift gear |62. 'I'he oscillations of pawls |8| and |82 are used in a manner described tuating shafts I01 (Fig. 4) are extended rearwardly and have respective collars secured adjacent the ends thereof. provided with opposite slots slidably engaged by corresponding teeth 202 of a shiftable drive establishing collar 203 mounted freely on the end of shaft |01. Opposite teeth 202 thereof, each collar 203 has smaller teeth 204 adapted for engagement with corresponding slots in respective gear sleeves 206, 201, which are journalled in frame bracket I6 and small plate 208 mounted on member I6 by suitable spacers and fastening screws. Gear sleeve 206 (Figs. 4 and 7) has gear 2|| meshing with idler gear 2I2 (Fig. 7) journalled in bracket I6 and plate 208 and meshing with shift gear |62. Gear sleeve 201 (Figs. 4 and 7) has gear 2 I3 (Fig. '1) offset axially from idler gear 2I2 and meshing with wide reverse idler gear 2I4 suitably journalled in bracket I6 and plate 208 and also meshing with idler gear 2I2. Thus, rotation of gear sleeve 206 in a clockwise direction as viewed in Fig-'7 causes clockwise rotation of shift gear |62 and shifting of carriage 22 to the left as viewed from the front of the machine. correspondingly, rotation of gear sleeve 201 in a clockwise direction as viewed in Fig. 7 effects counterclockwise rotation of shift gear |62 and shifting ofl carriage 22 to the right as viewed from the front of the machine. Thus,

by selective establishing of drive connections between gear sleeves 206, 201 (Fig. 4) and collars 20| upon selective shifting of respective shiftable collars 203, carriage 22 can be shifted in either direction. The gear ratios are so chosen that one rotation of actuating shafts |01 effects one-half rotation of V,shift gear |62.

Manually operable control means are provided for the carriage shifting mechanism described above t-o enable selective shifting of the carriage in either direction through one or more ordinal spaces. f Shift keys 22|, 222 (Figs. 5 and 10) are depressible to initiate shiftingbf the carriage to the right and left respectively] as viewed from the front of the machine. Depression-of either key serves to enable a drive connection from the actuating meansto the carriage shifting mechanism during the first part of its downward movement and thereafter to engage the clutch and energize the motor. Keys 22|, 222 (Fig. 5) are mounted for endwise movement by suitable longitudinal slots formed therein and engaged.

by a plurality of studs 223 secured on frame plate I3. Keys 22|, 222 have adjacent ears 226 with respective studs 221, 228 mounted therein and extending to either side thereof. To maintain the shift keys resiliently in raised position, coil spring 23| (Fig. 10) is provided having itsends fastened to side plate I3 and passing over upper studs 223 and under 4the ends of studs 221, 228 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 22|,-stud 221 (Fig. 10) engages the upper end of arm 232 secured on sleeve 233 (Figs 4-and 10). Sleeve 233 ls journalled on transverse shaft 234 which is suitably journalled at its ends in side plate |3 and bracket urged to its forward .position by spring 239 com- Each collar 20| is 4) has shift fork 24| secured thereon with itsforked end in engagement with an annular groove in right-hand shiftable collar 203. From the foregoing description, it is seen that depression of key 22| is effective through stud 221 to rock arm 232, sleeve 233 and arm` `231 to move rod 238 rearwardly. Such rearward movement of rod 238 is effective through shift fork 24| to engage teeth 204 of right-hand shift collar 203 with corresponding slots in` gear sleeve 201. Thus, initial depression of shift key 22| is effected to enable a drive connection from the actuating means to the carriage shifting mechanism, and to determine shifting of the carriage to the night.

A similar mechanism is employed in connection with shift key 222 to enable the drive connection to determine shifting of the carriage to the left. Stud 228 (Fig. 10) is engaged with theupper end of arm 246 having its hub secured on shaft 234. At its left end, shaft 234 (Fig. 4) has depending arm 241 (similar to arm 231) secured v thereon in operative relation with shift rod 248 having shift fork 249 at its rear end in engagement with an annular groove in left-hand shift collar 203. It is seen, therefore, that depression of key 222 results in rocking of shaft 234 and rearward movement of rod 248 to engage lefthand shift collar 203 with gear sleeve 206. This conditions the carraige 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 204 with the corresponding slots in gear sleeves 206, 201 so that the drive connection is 'enabled during the first part of the downward movement of keys 22|, 222.

The latter part of the downward movement of keys 22|, 222 is utilized to engage the clutch and energize the -motor. Studs 221, 228 (Fig. 5) overlie respective cam surfaces at the upper end of lever 25|. Lever' 25| is adjustably secured on lever 252 by pivot 253 and by pin and slot connection 254 having suitable clamping means for maintaining the relative adjustment between lecarriage.

vers 25|, 252. From the relation of studs 221, 228

'and lever 25|, it is evident that depression of lation of lever 252 (Fig. which has a'pin and slot connection with lever 251 having pin 258 mounted adjacent contacts 259 of the motor circuit. Lever 25| also provides an interlock between shift keys 22|, 222 vby means of lock portions 26|, 262 which are adapted to move beneath studs '221, 228 respectively. For example, if key 22| is depressed, lock portion 262 moves into blocking .position beneath stud 228.

Means are provided for maintaining the drive connection from the actuating means to the carriage shifting mechanism throughout leach cycle of movement even though the depressed shift key be released immediately after depression thereof and before complete shifting of the For this purpose each shiftable collar 203 is provided with a similar mechanism, only one of which will bev described. Right-hand shiftable collar 203 (Figs. 4, l and 9) is provided with disc 21| having a cut away portion 212 which, in the full cycle position of collar 203, is in the position illustrated in Fig. '1. Immediately to the rear of disc 21|, locking element 213 is provided mounted in bracket 214 for movement radially of collar 203, and urged to its extended position by spring 216. With shiftable collar 203 in its inactive position disc 21| is positioned forwardly of locking element 213 and when moved rearwardly of the machine to its active position passes by element 213 which is in alignment with the cut away portion 212. Upon subsequent rotation of disc 21| the solid portion thereof engages element 213 and prevents movement of collar 203 forwardly of the machine. so that teeth 202 are maintained in engagement with gear sleeve 201 for one or more.

completerevolutions or cycles irrespective of release of the associated shift key beforethe end of aV cycle. Left hand shiftable collar 203 is held in drive establishing positionA for each cycle of rotation by similar mechanism.

From the foregoing description it is seen that keys22|, 222 and the associated mechanism provide means for shifting the carriage selectively in either direction from one ordina position of the carriage to another. If a shift key be maintained in depressed position, shifting will continue until the carriage reaches an end position,l

when, as previously described, continued operation of the shifting mechanism in the same direction becomes ineffective, and means is brought into play to disengage the clutch and stop operation of the shift mechanism irrespective of release of the depressed shift key by the operator. f

For this purpose, clutch control link 256 (Figs.V

5 and 11) has pivoted connection 28| with lever 252 at one end and adjacent its other rearward end is notched at 282 for detachable engagement with pin 283 on clutch control lever ||1, the connection therebetween being maintained by spring 284. The rearward end of link 256 is bent to provide lateral extension 286 which lies under the hooked arm of bellcrank 281 pivoted by stud 288 on plate I3. The depending arm of bellcrank 281 is pivotally connected to link 289, which extends rearwardly for pivotal connection by pin 290 with the upright arm of bellcrank 29| pivoted at 292 on plate I3. The horizontal arm of bellcrank 29| is forked to engage pin 283 on slide 294 mounted for endwise sliding movement on studs 295 projecting outwardly from plate |3. Slide 294 is urged to itsupper position by spring 296 tensioned between pin 293 and upper stud 295, spring 296 also being effective through bellcrank 29| and link 289 to urge bellcrank 281 in a clockwise direction.

From the above-described relation of the parts, n

it will be seen that downward movement of slide 294 is effective through bellcrank 281 to move the rearward end of link 256 downwardly to disengage notch 282 from pin 283 and release clutch control lever ||1 for movement to clutch disengaging position.

The clutch controlling movement of slide 294 is effected in either end position of the carriage by means operated by the shift gear during the first cycle of movement thereof with the carriage in an end position. To effect this control with the carriage in the end position thereof shown in Fig. 7, pawl |82 is provided with cam arm 291 which in the end position of the carriage overlies the bevelled upper end of slide 294 so as to move the slide downwardly when pawl |82 is oscillated by a pin |6| of shift gear |62 during the first cycle of movement with the carriage in the end position shown.

To effect the clutch disengaging contra with' the carriage in the end position shown in Fig. 12, lever 298 is pivoted at 299 on one of rack teeth |58 with one end thereof held in operative engagement with pin, 30| of pawl |81 by spring |86. Lever 298 is provided with cam arm 302 overlying the upper end of slide 294 in the carriage position shown in Fig. 12, and isoperated through pawl |8| from shift gear |62 to eiect disengagement of the clutch in the same manner.

Thus, in either end position of the carriage, the drive for the shifting mechanism is disabled after one cycle of operation if the selected drive direction will-determine shifting beyond the end position. This control is also utilized in the Normalizing mechanism Means areprovided for restoring the machine' to normal condition between successive operations, and the restoring may be veffected by returning the carriage to either end position and by resetting the accumulator to zero after its return to either of such positions, in accordance with the type of calculation which is to follow. This mechanism is of the character disclosed and claimed in the co-pending application of Carl M. Friden, Serial No. 220,981, led July 23, 1938 now Patent No. 2,327,635, dated August 24, 1943. The normalizing mechanism includes selectivev control means in the form of keys 3|0 and 3|| .(Fig. 5) for controlling the return of the carriage to the selected end position and a subsequent zeroizing operation, after which the mechanism stops irrespective of whether or not the depressed key is held in this position.

Either of return and resettingvkeys 3|0 or 3|| (Fig. 5) is operative 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. The depressed key is latched in depressed position until the carriage return and resetting operation are effected when the latch is automatically released and the drive interrupted. Keys 3|0 and 3| are mounted for endwise movement on side plate I3 adjacent shift keys 22| and 222, respectively, and for this purpose, each of keys 310 'and 3|! is slotted for engagement by spaced apart studs 3|2 on plate I3, and are urged to their raisedposition by virtue of respective projections 3|3, and 3|4 thereon overlying teeth 3|5 and 3| 6 on shift keys 22|and 222, respectively. lBy `virtue of the overlapping relation of the keys 318 and 3|| with shift keys 22| and 222, respectively, depression of key 3|!) will initiate operation of the clutch and shifting of the carriage to the right, and depression of key 3H also enables the drive and effects carriage shifting to the left. Intermediate their ends, keys 3|() and 3|| (Fig. 5) are provided with respective latching teeth 3|1 and 318 for cooperation with pin 318 and nose 32|, respectively of latching slide 322. Since 322 is mounted for endwise sliding movement on plate I3, being slotted intermediate its ends for engagement with stud 3 23 and at its front end for engagement with lower s tud 3|2 associated with key 3|0. Spring 326 (Figs. 5 and 13) tensioned between a pin on side plate I3 and pin 321 at the rear end of slide 322 urges slide 322 to active position so that upon depression of either of keys 318 or 3| I, slide 322 will become eiective and .maintain the key in depressed position until it is released by means described hereinafter.

Asstated above, depression of either of keys 3|8 or 3| enables a drive connection from the actuating means to Zero resetting drive means. The zero resetting drive member comprises slide 33| (Figs. 4 and '1) mounted for endwise movement on frame bracket I6 vby brackets 332. Slide 33| has vertical projection 333 terminating in lateral extension 334 which' comprises the active part of actuating slide 33|, and is adapted for operative relation with either of two drive receiving arms carried by resetting bar 5I of the accumulator zero resetting means.

When lcarriage 22 is in its left end position as illustrated in Fig. 7 where it is returned by operation of key 3| I, extension 334 is in operative'relation with arm 336 pivoted at 331 (Fig.'7) on resetting bar.5| for numeral wheels 4| of the accumulator. Arm 336 has live pawl 338 pivoted thereon intermediate its ends and urged against pin 339 by spring 340 tensioned between pawl 338 and a suitable lug on bar 5|. Pawl 338 is adapted to cooperate with fixed ledge 34| mounted on frame bracket I6 `to maintain arm 336 raised to a position out of the path of slide extension 334 until the carriage is shifted into its left end position, or until arm 336 is out of the range of movement' of slide extension 334. Spring 340 also urges arm 336 to the position shown vwith pin 342 engaged with a surface of carriage frame 3|. With the parts positioned as illustrated in Fig. 7, it is seen that upon movement of slide 33| t`o the left, lateral extension 334 will engage the end of arm 336 to reciprocate resetting rack bar 5| and effect resetting of the accumulator wheels 4I in the manner previously described.

When carriage 22 is in its right end position as illustrated in Fig. 12 where itis returned by operatior. of key 3 Il, extension 334 is in operative relation with arm 343 pivoted at 344 on resetting bar 5| and urged in a clockwise direction by spring 345. At its outer end arm 343 carries roller 346 operatively engaged with lever 341 pivoted at 348 on carriage frame 3| and having cam nose 349 intermediate its ends for cooperation with fixed ledge 35|)` on frame bracket I6 to maintain arm 343 raised to a position out of the path of slide extension 334 until the carriage is shifted into its right end position, or until arm 343 is moved out of the range of movement' of slide extension 334. y

The means for actuating slide 33| (Fig, 7) includes arm 35| pivoted at 352 on plate I6 and having a slot at its upper end engaged by pin 353 onslide 33|. Intermediate its ends, arm 35| has roller 354 journalled thereon for cooperation with cam 356 under the inuence of spring 351. Cam 356 (Fig. 4) has hub 358 journalled in bracket I6 and in small plate 36| mounted in spaced relation from bracket I6 by suitable spacers'and studs.l Hub 358 of cam 356 extends thru bracket I6 and has opposite notches 362 for cooperation with corresponding teeth 363 of collar 364 shiftably mounted on the end of an actuatmeans for establishing a drive connection from the actuating means to the zero resetting drive member. Collar 364 has an annular groove to receive control fork 31| mounted at the rear end of rod 312 which'is supported for endwise slid- .ing movement in cross brackets I1, I8. Rod 312l is spring-urged to its forward position by spring 313 in the same manner as. rod 238 and spring 239 of the carriage shifting mechanism. The front end of rod 312 is normally engaged with the lower end surface of arm 314 (Figs. 1 and 4)" secured on shaft 315 which is movably supported in side plates I2, I3. Arm 314 (Fig. 1) has an upper end surface of greater radius so that clock- Wise-movement of arm 314, as viewed in Fig. l, causes endwise movement of rod 312 until it is engaged with the end surface of greater radius. Shaft 315 (Figs. 4, 5 and 10) carries bellcrank 316, having pin 311 on one arm thereof disposed below the lower end of key 3| l, and having pin 318 on the other arm thereof operatively engaged withthe forked end of arm 319 pivotally connected to the lower end of key 3|0. Spring 380 connected to bellcrank 316 holds it in operative engagement with keys 3|0 and 3| I. It is seen, therefore, that depression of either of return and reset keys 3I0 and 3| serves, by rocking shaft 315 and arm 314', to engage teeth 363 (Fig. 4) of shiftable collar 364 with'notches 362 of cam hub 358 thereby enabling the drive connection from the actuating means to the zero resetting drive member. As the depressed resetting key is latched in depressed position, such drive connection will remain enabled until release of the latch so that the carriage is returned to the end position corresponding to the depressed key, if displaced therefrom, and the next revolution of the actuating means is eiective to reset thesa'ccumulator to zero and `to release the latch for the depressed key. n

To effect the latch release, cam arm 291 (Fig. 1) of pawl |82 and cam arm 302 (Fig. 12) of lever 298 are cooperatively related in the respecing slide 381 which is mounted for endwise movement by studs 295 on side plate |3, so that slide 381 will be actuated thereby in the same manner as clutch disengaging slide 294, and at the same time, i. e., during the cycle of operation during which the zero resetting of the accumulator occurs. Latch releasing slide-381 (Fig. 13) carries pin 388 which is engaged by the forked end of bellcrank 389 pivoted by stud 292 on side plate I3 and having its other end 'connected by pin 321 to latch slide 322, so that spring 326 urges slide 381 to its upper position. Thus, when slide 294 is actuated by cam arm 291 (Fig. 7) or by cam arm 302 (Fig. 12), bellcrank 389 (Fig. 13) moves latch slide 322 (Figs. 13 and 5) rearwardly to release the depressed resetting key.

In accordance with my invention, means is provided to prevent latching al resetting key in depressed position when the carriage is in either one of its end positions so that if the operator maintains a key depressed after completion of the resetting operation it will be free to move to its'raised position, and so that the connection for controlling engagement of the clutch can be re-established. Latch bellcrank 39| (Figs. l1 and '13) ispivoted on upper stud 295 between slides 294 and 381 and has ear 392 connected by spring 393 with pin 388 on slide 381 so that it is urged in a clockwise direction, spring 393 also urging slide 381 upwardly. The depending arm of bellcrank 39| (Fig. 13) is notched to provide latching shoulder 394 for operative engagement with laterally projecting latch toothI 395 of slide 381 in the depressed position thereof shown in Fig. 14. IThe horizontal arm of bellcrank 39| is provided with laterally projecting ear 396 which rides against the bottom face of carriage frame 3| at the rear edge thereof so that bellcrank 39| is held inactive except in the end positions of the carriage where one of the respective recesses 391 (Figs. 5, 'l and 8) and 398 (Fig. 12) is aligned therewith. As shown in Fig. 14, when recess 391 is aligned with latch bellcrank 39|, which condition will obtain at the end of each resetting operation controlledby key 3||, bellcrank 39| will move into active position to maintain slide 381 depressed, so that latch slide 322 (Fig. will be held in inactive position with respect to keys 3|0 and 3| Upon subsequent displacement of the carriage from an end position, bellcrank 39| will be moved to inactive position so that latch releasing slide 381 and latch slide 322 will be returned to their normal positions shown in Figs. 5 and 13.

Shifting operation The shifting operation Will be described, assuming that the carriage is to be shiftedv to an end position from some other position by depression of shift key 22|, for example. Depression of key 22| (Figs. 10 and 11) serves thru arm 232 to rock sleeve 234 and arm 231 depending therefrom, so that rod 238 (Fig. 4) is moved rearwardly to engage right hand collar 203 with sleeve 201 to enable the drive to shift gear |62.

After the drive connection to the shift gear is established further depression of key 22| (Fig. 5) serves thru levers 25| and 252 to close the motor circuit by engaging contacts 259 and to engage the clutch thru link 256 which rocks clutch control leverI ||1 (Figs. 5 and 6) in a direction to release clutch pawl ||4.

The machine begins to turn over and shift gear |62 is rotated in a counter-clockwise direction as viewed in Fig. l2 until the carriage enters the end position illustrated. Assuming that the operator continues to hold the shift key 22| depressed during the next cycle of operation, one of` pins |6| oscillates pawl |8| in a clockwise ldirection so that pawl 298 is oscillated thereby.`

Arm 302 of pawl 298 strikes the end of slide 294 so that the slide moves downwardly against the tension of its spring 296 and serves to oscillate bellcrank 29| in a clockwise direction. Such movement of bellcrank 29| operates thru link 289 to rock bellcrank 281 in a counter-clockwise direction so that link 258 is moved downwardly to disengage the notch 282 from pin 283 on clutch control lever ||1. Thus, lever ||1 is free to move by gravity into the path of clutch pawl ||4 and move this pawl to clutch disengaging position at the end of the cycle of operation then in progress to interrupt the drive even though the shift key be maintained in depressed position. Subsequently, when key 22| is released, link 258 (Fig. 5) moves upwardly under the influence of its spring 284 and is also moved forwardly (to the left in Fig. 5) by the return of lever'25l to its neutral position to re-engage its notch 282 with pin 283 so that the parts are reconditioned for subsequent operation.

If the shifting operation is performed by depressing key 222 so that the carriage is shifted to its other end position as shown in Fig. pins |8| of shift gear |62 are operatively related to pawl |82 so that its arm 291 serves to operateslide 294 and cause the subsequent disengagement .of the clutch irrespective of continued depression of key 222.

Normalizing operation The operation of the normalizing mechanism will be described in connection with depression of the key 3|0 (Fig. 5) which also causes depression of key 22| to operate the shifting mechanism in the manner described above. Key 3|0 is connected by link 319 with bellcrank 316 so as to cause oscillation of shaft 315 (Figs. l and 4) which operates thru cam arm 314 to move control rod 312 rearwardly so that resetting collar 364 is moved into driving engagement with hub 358 of resetting cam 356 (Fig. 7) Consequently, during the operation of the shiftingA mechanism cam 356 serves thru armV 35| to reciprocate actuating slide 33| once for each cycle of operation. Thus, when the carriage enters the position shown in Fig. 12 its arm 343 is permitted to move into the path of travel of actuating tooth 334 rack bar 5| will be oscillated to reset the accumu-v lator to zero registration. The arm 343 is allowed to drop as the carriage finishes its last step of shifting movement by arm 341 whose cam tooth 349 rides off of ledge 350 at. this time.

As a result, actuating slide 33| performs a resetting operation during the rst cycle of the ac-r tuating means following the shift cycle which placed the carriage in its end position. During this cycle of operation as previously described, pawl |8| (Fig. 12) is oscillated to correspondingly oscillate pawl 298 so that its arm 302 moves slide 294 downwardly to disengage the clutch in the manner described in connection with the shifting operation. Arm 302 is also effective with respect to latch disabling slide 381 (Figs. 12 and 13) which operates thru bellcrank 389 to move latch slide 322 rearwardly of the machine to remove pin 3|9 from its latching engagement with tooth 3|1 on key 3|0.

At the same time that slide 381 is moved downwardly latching bellcrank 39| moves from the position shown in Fig. 13 to that shown in Fig. 14, so that slide 381 and its associated latching slidel 322 cannot again be moved to operative position until the carriage is shifted out of its end position where recess 391 in carriage frame 3| enables the active movement of latch bellcrank 39|.

The operation undercontrol of carriage return and resetting key 3|| is similar to that described aboveexcept that pawl |82 and its arm 391 are effective with respect to slides 294 and 381 as shown inFigI '7.

While I have shown and described a preferred embodiment of the invention, it is to be understood that the invention is capable of both variation and modification from the form shown without departing from the true scope thereof, which should be limited only by the scope of the claims appended hereto.

I, therefore, claim as my invention:

1. In a calculating machine, a register carriage "mountedrfortendwise shifting movement, shift means for said register carriage, drive means for said shift means, a key for initiating operation of said drive means and controlling operation of said shift meansto move said register carriage to a predetermined position if displaced therefrom, means for latching said key in drive initiating position, means for interrupting operation of said drive means with said register carriage in said predetermined position and with said key held in operative position, and means controlled by said register carriage for disabling said latching means when the regi-ster carriage is in said predetermined position, whereby to prevent latching of said key in said operative position with said register carriage in said predetermined position.

2. In a calculating machine, a frame, a carriage mounted for endwise shifting movement on said frame to a plurality of ordinal positions, a key, a latch for said key, and means controlled by said carriage in a predetermined ordinal position thereof for disabling said latch including springurged latching means for maintaining said latch in disabled condition. 1

3. In a calculating machine, a frame, a carriage mounted for endwise sluiting movement on said frame to a plurality of ordinal positions, a key, a latch for said key, means for moving said latch to inactive position, latch means for maintaining said latch in said inactive position, and means on said carriage for releasing said latch from said maintaining latch means.

riage mounted for endwise shifting movement on said frame, means including a key for controlling a machine operation involving shifting of said carriage to a predetermined ordinal position thereof if displaced therefrom, a latch for maintaining said key in operative position, latching means for said latch spring urged into operative latching position to hold said latch inactive, and

means comprising said carriage for restraining and releasing said spring urged latching means.

7. In a calculating machine, a register mounted for endwise shifting movement, zeroizing means for said register, means for shifting said register, drive means for said zeroizing means and said shifting means, a key, means controlled by said key for initiating operation of said drive means to eiect shifting of said register to a predetermined position if displaced therefrom and to means for said register having a controllable drive connection with said drive means. a register return and clear` key, means associated with said key for engaging said clutch and for enabling said controllable drive connections to effect shifting of said register to Aa predetermined position if displaced therefrom for a zeroizing operation, means for latching said key in operative position, means for releasing said latching means, and

. means operable in time with said releasing means for disengaging said clutch with said key held in drive connection with said drive means, a reg- 4. In a calculating machine. a frame, a carl riage mounted for endwise shifting movement on said frame, means including a key for controlling a machine operation involving shif ing of said carriage to a predetermined ordi al position thereof if displaced therefrom, a latch for maintaining said key in operative position, and springurged latching means controlled by said carriage for holding said latch in inactive position with said carriage in said predetermined position.

lll

5. In a calculating machine, a frame, a carclutch engaging position.

9. In a calculating machine, actuating means, a register mounted for endwise shifting movement relative .to said actuating means, drive means including a cyclically operable clutch, shift means for said register having a controllable drive connection with said drive means, zeroizing means for said register having a controllable ister return and clear key, means associated with 4said key for engaging said clutch and for enabling said controllable drive connections to eiect shifting of said register to a predetermined position if displaced therefrom for a zeroizing operation, means for latching said key in operative position, means for releasing said latching means, means operable in time with said releasing means for disengaging said clutch with said key held in clutch engaging position, and means controlledv Ly said register and rendered operative with said register in said predetermined position for holding said latching means inactive after release of said key, whereby to prevent latching of the key upon subsequent operation thereof with said register in said predetermined position.

`l0. In a calculating machine, a frame, a carriage mounted for endwise shifting movement on said frame, a rack on said `carriage including a yieldable pawl at an end thereof, a shift gear c0- operating with said rack for 'shifting said carriage, said pawl yieldingupon engagement with said'gear to prevent shifting of said carriage beyond an end .position thereof, drive meansfor said gear including a clutch, a control lever for said clutch, a key, a disengagcable controlling connection between said key and said lever, a latch for holding said key in clutch engaging position, means for releasing said latch including a slide mounted for movement on said frame, means for eiecting disengagement of said controlling connection including a second slide mounted for movement on said frame adjacent said rst-named slide, and means movable with said pawl for operating said slides.

ll. In a calculating machine, a frame, a carriage mounted for endwise shifting movement on said frame, a register in said carriage, means for shifting said carriage, zeroizing means for said register mounted in said carriage, power-driven means on said frame including a clutch for driving said zeroizing means, manually operable control means on said frame associated with said clutch and said-zeroizing means for initiating and controlling a zeroizing operation of said regtion of said drive means and controlling operation of said shift means to move said register carriage to a predetermined position if displaced therefrom, means for latching said key in driveinitiating position, means operated by said shift means to move said latching means to key releasing position upon movement of said carriage by said shift means to said predetermined position, and means controlled by said carriage for holding said latching means in said key releasing position when the carriage is in said predetermined position.

13. In a calculating machine, a register carriage mounted for endwise shifting movement, shift means for said register carriage, drive vmeans for said shift means, a plurality of keys for initiating and controlling operation of said drive means and said shift means, each of said keys determining shifting movement of said register carriage to a corresponding predetermined position if displaced therefrom, latch means for said keys, means controlled by said register carriage when in any of Said predetermined positions for interrupting operation of said drive means with said key held depressed, means operated by said shift means to move said latching means to key releasing position upon movement of said carriage by said shift means to said predetermined position, and means controlled by said register carriage for holding said latch means inoperative when the register carriage is moved to said predetermined position by operation of said shift means.

JOHN L. MOODY.

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