US2388209A - Revolutions counter acturator - Google Patents

Description

Oct. 30, 1945. c. M. F. FRIDEN REVOLUTIONS COUNTER ACTUATOR Original Filed May 8, 1934 4 Sheets-Sheet 2 m n m A u m u m w INVENTOR ar/ M. E Fr/'den ATTORNEY Oct. 30, 194.5. c. M F. FRIDEN REVOLUTIONS COUNTER ACTUATOR Original Filed May 8, 1954 4 Sheets-Sheet 3 l `*\`Nh\\\\\\m\\% m w mn .w W F. MW w. (M m m-HFTIMH ATTORNEY Oct. 30, 1945. Q M F FRIDEN 2,388,209

REVOLUTIONS COUNTER ACTUATOR Original Filed May 8, 1934 4 Sheets-Sheet 4 'Faye/I `l l I' I 0,1342? l FlE -LE INVENTOR ATTORNEY i Athrough the upper rear Patented (.)cte 30, 1945 2,388,209 REVOLUTION S COUNTER ACTUATOR Carl M. F. Friden,

Pleasanton, Calif., asslgnor to Friden Calculating Machine Co., Inc., a cor poration of California Original application May 8, 1934, Serial No.

6 Claims.

This invention relates to calculating machines and is concerned more particularly with the provision of improvements in the revolutions counter mechanismvand its control.

This application is a division of my copending application, Serial No. 724,482, illed May 8, 1934, for Calculating machine, now Patent No. 2,229,889.

It is a general object of the invention to provide an improved revolutions counter mechanism for a calculating machine.

Another object of my invention is to provide in a calculating machine of the type having rever'sible numeral wheels and uni-directionally operable drive means therefor, anlsm for controlling the sign character of the registration on ,the numeral wheels. l

A further object of my invention is to provide improved actuator means for the revolutions counter in a calculating machine.

Other objects and advantages of the invention will be apparent from the following description of a preferredembodiment thereof as illustrated in the accompanying drawings, in which:

Figure 1 is a fragmentary sectional view portion of a calculating machine embodying the invention;

Figure 2 is a plan view of the revolutions counter actuator taken in a plane indicated by the line 2-2 in Figure 1;

Figure 3 is a perspective view of a portion of the revolutions counter actuator;

Figure 4 is a fragmentary sectional view taken in a plane indicated by the line 4-4 in Figure 1;

Figure 5 ls a fragmentary side elevational view partly in section of a portion of a calculating machine;

Figure 6 is a detail tion;

Figure 7 is a fragmentary elevational view partly in section of a portion of the revolutions counter control mechanism;

Figure 8 is an elevational view partly in seetion of the plus-minus keys and their associated controlling parts;

Figure 9 is a fragmentary view of a portion of the revolutions counter mechanism, the view being taken lin a plane indicated by the line 8-8 in Figure 8;,y

Figure 10 is a fragmentary Aelevational view partly in section of the left side of the machine and illustrating a portion of the counter control mechanism.

Figure 11 is a fragmentary sectional view of a view of the clutch construc- Divided and ber 16, 1940, Serial No.

improved mechthis application Decem` part of the revolutions counter control mechanism;

Figure 12 is a fragmentary plan view, partially in section, taken in a plane indicated by the line i2|2 in Figure 1l;

Figure 13 is a timing diagram of the drivey mechanism for the revolutions counter actuator.

Drive mechanism 'Ihe calculating machine disclosed herein includes a base 6 (Figures 5, 8, and 10) which carries at its opposite sides frame plates 8 and 8 which are suitably joined together.

Mounted on the base 6 is a suitable electric motor (not shown). The motor shaft 5i (Figure 5) carries a pinion 63 which meshes with an idler gear 6| suitably journaled in the frame plate 9. The idler gear 6| in turn meshes with a sixtytooth gear 62 connected to a. ratchet 68 (Figure 6) forming part of the main clutch mechanism. Arranged in the same plane as the ratchet 86 is I a lever 81 centrally pivoted as at 68 on an adjacent driven disc 69 which is mounted on main shaft 83. One'end of the lever 61 is provided with a nose 1I which is urged into engagement with the ratchet by a coil spring 12 fastened to the plate 88. The other end of the lever 61 projects radially, as at 13, from the periphery of thedisc 68 under the urgency of the spring 12.

To *hold the clutch out of engagement, the nose y1I (Figure 6) must beheld away from the ratchet 66 against the urgency of the spring 12, and for that purpose, I provide a lever 18 (Figures 5 and 6) pivoted as at 11 on the frame plate 8. One arm 18 of the lever 16 is provided with a tooth 18 which is co-planar with and normally in the path of the projection 13. 'I'he other arm 8| of the lever 16 is provided with a pin 82 for controlling the rotary position of the lever 16. Thus, when the lever 16 is rotated clockwise, as* seen in Figures out of the pathof the projection 13 and the spring 12 is effective to cause engagement of the noseV 1| with the ratchet 86, thus coupling the gear 62 with a main shaft 83 extending transversely of the machine between the frame plates 8 and 9 and journaled therein.

In order that the lever 16 will be heldin clutchengaged position for a complete rotation of the shaft 83, there is arranged a disc 84 (Figure 5) comparable to the disc 69 but having an interruption or irregularity 86 in its peripheral continuity, which is adapted to cooperate with a button 81 mounted,on the lever 16. The relationship of these parts is illustrated in Figure 5. with 5 and 6, the tooth 19 is drawn the clutch in disengaged positionne Vthe buiten 81 within the irregularity 86. This is the "fullcycle position of the parts. As soon, however, as

.free tov fall into the irregularity 86, to maintain the parts in their 'relative positions with the clutch disengaged. Thus, when the clutch is in engagement, the shaftv 63 is rotated by the motor. Actati'g and selecting mechanism The main shaft 83 at suitable intervals of its length, carries bevel gears 9| (Figure l) each of which meshes with a comparable bevel gear 92 fastened on its respective actuator shaft 93. The shafts 93 are arranged parallel and are journaled in a pair of plates 94 and 96 extendingtransversely of the machine and in turn mounted in the frame plates 8 and 9. There are as many shafts 93 as there are orders in a particular machine.

Shaft 93 shown in Figure 1, for example, carries an actuator in the form of a segmental gear 91 which is provided with teeth of differential character for entering values in the machine in a well known manner.

Each of the actuators 91 is effective upon an associated shaft`|06 (Figure l) which is pref,- erably of square cross section and carries a pair of pinions and ||2 for cooperation with the two sets of teeth on the associated actuator. The pinions and ||2 are adapted to be differently lpositioned withrespect to the teeth by respective links |22 operated by means of a suitable lseries lof keys indicated generally at |66. The anfangement is such that a shaft |06 will be rotatedfor a number of increments corresponding to the value of the depressed keys by means of the relative positioning of the pinions and ||2 with respect to the actuator teeth.

Accumulator The machine includes an endwise shiftable carriage 226 (Figures 1 and 5) containing an accumulator generally indicated at 221 (Figure l) which is formed of a plurality of numeral wheel shafts 233 each carrying a numeral wheel 234 at its upper end. Numeral wheel shafts 233 at their lower ends carry numeral wheel gears 264 which are adapted for meshing with respective gears 262 and 263 on a spool 26| slidably mounted on square shaft |06. The adjustment of gears 262 and 263 into mesh with the aligned gears 264 is under control lof suitable plus and minus keys.

Plus and minus keys Y The machine, for the various rules of calculation, is manually under the control of. a plus key 40| (Figure 8) and a minus key 402. These keys are identical in shape and each is provided with a pair of elongatedA slots 406 which guide the key on a pair of headed pins 401 projecting from-the control plate 54. Adjacent the lower end, each key is provided with a projection 408 passing through a suitable aperture in the control plate 54 for engagement with a suitable coil spring (not shown) for urging the respective key to its uppermost position. y

Plus key 40| (Figure 8) has a' pin 413 projecting from the key and adapted to contact with an h:fassazoe v .inclined cam face 4|4 forming part of a slide 4|8 having slots 4I1 engaging supporting pins 401. 'I'he slide 4|6, as the key 40| is depressed, therefore moves correspondingly, being translated to- Ward the leftl in Figure 8. Between its ends the slide 4|6 is provided with anaperture 4|8 into which'projects a pin'4l9. The pin.4|9 (Figure 5) is at one extremity of a lever 42| pivoted as at 422 on the frame plate 9, and in turn at its opposite extremity provided with a fork 423 to engage a pin 424 at the extremity of a lever 426. This latter lever is pivoted by a headed bolt 421 on the frame plate 9 and at its opposite end carries a pin 428 which extends through an aperture in the frame plate 9 and abuts one of the resilient arms 429 of the motor switch generally designated 43|.

Thus, vwhen the slide 4|6 is translated toward the left, in Figure 8, by the depression of the plus key 40 I, the pin 4| 9 causes oscillation of the lever 42| (Figure 5) and of the lever 426 toclose switch 43| and energize the motor.

Substantially simultaneously with the energization of the motor, the clutch lever 16 is actuated. For this purpose the slide 4|6 (Figure 8) likewise carries an elongated aperture 431 into which projects the pin -82 (Figure 5) which is mounted, as heretofore described, on the clutchoperating lever 16. Upon the depression of the plus key 40|, therefore, not only is the motor energized but likewise the clutch lever 16 isi` rocked so that pawl 61 is engaged with the ratchet .i

66, so that the actuating mechanism is set into motion. The slide 4|6 is held by thecam 84 in clutch-engaging and contact-closing position for, a complete rotation of the mainy shaft, at any time during which the plus-key 40| can be retric motor andcorresponding rotation ofthe actuato'rs, the depression of the key causes an intermeshing of the pinions 262 and 264 (Figure l). Thus, the plus key '40| (Figure 8) carries a projecting pin 44| which is adapted to act against a cam face 442 on a, plate or slide 443. One end of the plate 443 is pivoted as at 444 to a supporting lever 446 in turn fastened on the control plate 54 by a pin 441. The other end of the plate 443, however, is connected by a pivot 446 (Figures 8 and 5) to a lever 449 (Figure 5) mounted on a shaft 45| passing through the frame plates 8 and 9. The shaft 45| extends transversely of the vmachine and, adjacent each end, carries an upright arm 452 (Figure 1). `Arms 452 support a cross-strap 453 which is situated between the pinions 262 and 263 and is adapted to bear against them whenever the shaft 45| is rotated.

Thus, when the plus key 40| is depressed, the pin 44| .abuts the cam facel 442 and translates the plate 443 toward the left, as seen in Figure 8.

Thisltnslation of the plate 443 causes, through the c nection of the pin 448 with the lever 449, a rotation of the shaft 45|. This in turn simultarously rotates the uprights 452 and moves th s trap 453 t ward the rear of the machine.

vneutral position is opposed by one of a pair of fingers' 454|A and 456, each of which is pivoted as at 451l and 458, respectively, to the frame ,f v

' plate 8. A central abutment 456 serves as a stop 5 store al1 of the spools 26| to neutral position ai projecting from the lever arm 466.

, lower 464 of a lever generally designated 466, which lever vm (Figure 1o) f from full-cycle position. energized, therefore, with the shaft 45| in neuthe conclusion, df a cycle of operation, .providing the plus key 40| is then in released position.

'Ihe plus lcey 40| \can be held depressed for any number of cycles desired, but`in the event it'is released prior to the completion of a complete cycle there is provided mechanism for maintaining the spools 26| in shifted relationship until the completion of the cycle or the return of the machine to full-cycle position. i At one extremity, the main shaft 83 (Figure 10) carries a cam disc 463 having a cam fiat thereon in what correspondsto the full-cycle location of the disc. Running on the cam 463 `is a folformed integrally with one arm 465 is pivoted on a pin 461 on the plate 8.'` The lever 466 likewise has an arm 468 terminating in a single tooth 46s. The fonower m islurged into contact with the cam 466 by a coil spring 41| at one end hooked toa pin 412 on the frame plate6 and at the'other end hooked on a pin 4,16

machine is in full c'ycle position, thereforel the spring 41| is effected to hold the tooth 466 in one extreme position, while during the. operation of the machine or at an intermediate cycle position the tooth 466 occupies its other ,extreme position. l f

To take advantage of this motion, the shaft passes through the frame plate 8'and carries a depending ,segment 414 which is peripherally provided with al series of three notches 415, 416,'and 411. When the shaft 45|` is in neutral position-that is, with the spools 26| in such a location that not engaged-the notch 416 receives the tooth 466 as soon as the shaft 63 begins a rotation/ If the machine is once"/ tral position, the machine is so held or locked in such position until the completion of that cycle. On the other hand, when the plus key 40| is depressed and the shaft 45| is rotated in an anticlockwise direction, as seen in Figure 10, then thectooth 466 is received by the notch 415 when the cycle of operation commences.

ever, the spring 41| retracts the lever 466 and i the shaft 45| is free to return' to its neutral posi-fr tion under the iniluence of the centralizing levers 454and456." y f When the minus key 402 is depressed, a similar sequence of operation occurs. This key 402 car- .ries a projection 416 (Figure 8) vdesignen to ensage a cam face 416 on the slide 4 6 and yto translate the slide toward the left, ag-,seen in Figure 8, with the same motion that is caused by depression' of the plus key 40|, to energize the vfjlectric motor and, to engage the clutch. Furt ermore,

the minus key 4oz is provided with e projection 46| which is designed to vcooperate with a cam face 462 on the plate 446. Sincelthe face` 482 is opposite in inclination to the face 442, engage-yy ment of the pin'48|l with such face is productive of a translational the plate in anoppositedi'rection, or toward the right, as seen in Figure 8. Through the pin 448 such movement rocks the lever 446 andthe shaft 45|. This movement,

When the the gears 264 are y As soon `as the machine returns to full-cycle position, howf however, is such as to move the strap 452 toward the front of the machine and to translate all of the spools 26| in such a direction that the pinions 263 mesh with the gears 264 of the register mechanism. Such movement of ,the strap 453 is of course against the urgency\of the centralizing lever 456. Anegative registration is provided in vthe accumulator when the gears 263 and 264 are in mesh.- While thesegears are being meshed, l due to the rotation of the shaft 45|, the segment 414 is rocked, soI that upon the initiation of the cycle the tooth 466 forming part of thelever 466 is received by the notch l411 vand the relationship of the parts is maintained until the conclusion i of a cycle,

Revolutions counter mechanisin accumulator is a revolutions counter, ,generally designated 306 (Figure 1). This register comprises a plurality of shafts 301 Journaled at opposite ends in extensions 308 and 306 of the carriage frame 226. I'he spacing of the shafts 301 is the same as thev spacing of the successive or- 5 ders in the accumulator. Each of-these shafts 301 carries a numeral wheel 3| bearing numerals from "0" to "9 inclusive, spaced apart on the periphery of the wheel and adapted to be seen through a reading aperture 3|2 cut in the upper 30 face of the carriage, shell 226. l l

The individual numbers of the Wheel 3|| are line with `the aperture y a suitable centralizing mechanism. Also, l the shafts 301 are alternately provided with axial- 3:, y,ly oii'set clearing gears 3|4 meshing with a multisectional clearing rack 3|6 of conventional construction. 'Ihe rack 6|6, however, is operated agai ,t the urgency of a suitable vspring (not sho )./l by means of aknob 3|8 (Figure 5) pro- 40 jectin from the upper face of the carriage. The revolutions counter is therefore provided with a plurality of numeral wheels 3|| arranged in y spaced'relationship and in any desired number for the capacity of the machine. The individual wheelsl'of this register are all properly centralized suitable actuator. The actuator includes a memtranslatorys reciprocation and the other an oscillation. That is; the member or shaft 32| is mounted in the plates 8 and 6 to move from end to en'l to be rocked back and forth. Mounted on the shaft is a pair of collars 322 each of which is extended to support a pair of parallel rods 323 Disposedon the shaft 32| between the collars 622 is a plurality of actuator spools 326 whichv in general are identical and are of such size as to be spaced w" h the Isame spacing as the shafts 301. The right hand spool 326 as viewed v, in Figure 2 is only ypartiallyI complete as com-v pared with other spools, and carries a finger 321 whic projects radially between a ten-tooth gear 326 Figure 1) and a single-notch'disc 326 (Figures 1 and 4) both on'the shaft 301.

. Forming part of the finger 321 is an eyelet,33|

to" which is hooked a spring 332, the other @nd of which is hooked on the ,rod 323. Thus, the

wise; as seen in Figure 1 about the shai't`32l in adireotion to engage with gear 326, The point of 75.y introduction of finger" 321 into gear 328 islcon- Mounted on the carriage 228, in addition to the ../spring 332 urges the flngerf321 to rotate clocktrolled by the direction of axial movement of the finger 321 from its normal central position. This initial axial movement of finger 321 occurs while ,the finger 321 is being rocked toward gear 323 but before it is introduced into the gear. At the end of the initial axial movement of finger 321, a dwell occurs before the return axial movement, and during this dwell the clockwise movement of finger 321 becomes effective to mesh finger 321 with gear 328. Suchl movement of the finger, however, is normally restrained by a projection 333 likewise forming part o f the spool 326 and engaging with the shaft 324. As particularly seen in Figure l, therefore, as the shaft 32| rotates or oscillates clockwise, carrying with it the frame rods 323 and 324, under the urgency of the spring 332 the finger 321 is moved to introduce itself between successive teeth on the gear 323.

' At this time the shaft is translated axially to return to its normal central position. Such movement, since the finger 321 remains intermediate successive teeth on the ten-tooth gear 328, is' effective to rotate the shaft 301 for one-tenth of a complete revolution, and thus to advance the numeral wheel 3H for one successive digit.

At the conclusion of such axial movement toward normal central position the shaft 32| again oscillates but this time in an anti-clockwise direction, so that the finger 321 is rotated positively, due to the contact of the shaft 324 against the finger 333, into the position as seen in Figure l in which the finger is out of mesh with the pinion 323. By the described operation, the numeral wheel 3l I is advanced one unit. j

It Vis especially pointed out that if, when the shaft 32! rotates to mesh the finger 321 with the ten-tooth gear 323, such meshing is followed by an axial translation of the shaft 32! toward the right in Figure 2, then the numeral wheel is advanced in a positive direction. On the other hand, if, following the meshing of the finger 321 with the gear 323, the axial translation of the shaft 32| is toward the left, as seen in Figure 2, then the direction of movement of the shaft 331 and the numeral wheel 3H is subtractive or negative. The control for the direction of axial movement of the nger 321 is described hereafter.

Tens transfer mechanism for revolutions counter Now, for each complete rotation of a lower order numeral wheel 3| l of the revolutions counter, the numeral wheel of the next higher order must be advanced one-tenth of a rotation. To this end the spool 326 which is arranged intermediate the lowest order and the next higher order, as seen in Figure 2, is not only provided at its left-hand end with a finger 321, but is also provided at its right-hand end with a finger 336 which is bent to be co-planar with linger 321 of lowest order and carries a projection 331 so that the parts are in contact when they bear the relationship illustrated in Figures 1 and 3. Thus, the spring 332 of the tens order, for instance, as seen in Figure 2, is effective to urge the finger 336, and particularly its projection 331, into contact with the finger 321 of the units" order. However, the spool 326 of the units order cannot yield because its projection 333 is in contact with the shaft 324. When, however, the shaft 324 rotates about the axis of the shaft 32|, 'the finger 336, under the urgency of its spring 332, tends to follow the finger 321, but can only do so when the notch in the disc 323 (Figure 4) of the units order is in position therefore, which only occurs when the units order counter numeral wheels stands jat 9 or 03|- 3 position', i. e., it is conditioned for a positive transfer and the notch is in one of its passing positions for nger 336.

If the notch is out of its passing position for the particular' sign character of the registration being performed, i. e., when no tens carry has been determined by the units order counter numeral wheels, the finger 336 cannot pass by the barrier of the disc, then the spool 326 cannot rotate about the axis of the shaft 32| and finger. 321 of the tens order is held in inactive position. Correspondingly, due to the similar interlocking relationship of the remainder of the spools 326 for the higher orders, all such higher order spools are maintained stationary. But on the other hand, if the tens-carrying notch in the disc 323 of the units order, for example, is `in position to permit passage of the finger 336, associated therewith, during a positive registration as shown in Figure 4 then such finger rotates along with the iinger 321 of the units order and causes a corresponding rotation of the spool 326. As a result, the finger 321 of the tens order is effective on the gear 323 and the shaft 301 of the next higher or tens order lin the revolutions counter to rotate such shaft through one-tenth of a rotation during return of the finger toits central position and thereby effect the tens-carrying operation.

Operation of revolutions counter actuator The rotary oscillation of the shaft 32| is produced in synchronism with the rotation of the shaft 33. At the end of the shaft 83 which projects through the frame plate 8 there is mounted an eccentric 34| (Figure 10) against which bears a follower ,342 projecting from one arm 343 of a bell crank generally designated 344 and pivoted as at 346 on the plate 8. A coil spring 341 is anchored to the plate 3 at one end by a pin 343 and at the other end is connected to a pin 343 on the arm 343. The bell crank is likewise provided with an arm 35i which is forked to engage a pin 362 on a crank 353 mounted on the opposite side of the plate 8 and fastened on the shaft 32|. The pin 332 projects through an aperture 334. Thus, for each complete rotation of the shaft 33 the bell crank 344vis oscillated about the pivot 346 and through the crank 353 causes a comparable complete oscillation of the shaft 32 I. The

cycle of operation, the rocking movement of finger 321 starts but it is ineffective until the finger 321 meshes with gear 328. This meshing occurs about after the beginning of the cycle and the parts continue meshed until about 80 before the end of the cycle. Thus, the first 80- to the cycle is effectively idle insofar as engagement of the finger 321 with the gear 323 is concerned, and during this time -an axial translation of the actuator linger 321 can occur. As explained later, during the time the finger 321 is engaged with the gear 323, a return axial movement of the actuator finger is effected to cause entry of a count inthe counter.

The longitudinal or axial translation of the shaftv 32| is provided by a mechanism especially illustrated in Figures l1 and l2. On the shaft 33 is mounted a cam drum 356 having a pair of grooves 351 and v-353 cut therein. These cam grooves are of identical contour but are Dolarly or angularly spaced from'each other. In order to change the phase relationship of the axial move- Disc 323 is positioned in Figure 4 in its ment of the shaft 32| to the rotary movement thereof, I provide means for optionally engaging either of the grooves 351 and 358. To this end, on the frame plate 9 I provide a pair of projecting ears 36| and 882. These ears mount a cross-shaft 363 which is held in place by suitable pins 364 and on which is mounted a sleeve 366. The lower end of the sleeve is united to a lever arm 311 at the extremity of which is a follower pin 318. Likewise on the sleeve 366 is a lever arm 319 at the extremity of which is a follower pin 38| adapted to extend into the groove 351.

To hold the sleeve 366 in either desired extreme position, I likewise provide on the sleeve a groove 382 in which runs a shifting pin 383 projectingr through an aperture 384 in the plate 9 and carried at the end of a lever 386 fast on a shaft 381. Thus, as the shaft 381 is rotated between its two extreme positions, the pin 383 shifts the sleeve 366 along the shaft 363. In this fashion, either the pin 318 is introduced into the groove 358 so that the sleeve 366 reciprocates in phase relationship with the characteristics of the groove 358, or, conversely, the sleeve 366 is shifted in the pposite direction or downwardly on the shaft 363 and the pin 38| is engaged in the groove 351 so that the sleeve in such circumstances partakes of the reciprocating movement imparted by the cam groove 351.

'Ihe motion of the sleeve 366, which is an oscillation about its axis, is transmitted by a lever arm 388 which is fixed to the sleeve and at its extremity is forked, particularly as shown in Figures 2 and 12-, to engage a radially depending pin 389 projecting from collar 322 encompassing the shaft 32|.

If pin 318 is engaged with groove 3,58, the iirst half of the axial reciprocation, which occurs before the actuator finger 321 is enmeshed with the gear 328, moves the finger to the left as viewed from the front of the machine, so that a positive registration is eiected. From the timing diagram in Figure 13, it is seen that the initial axial movement o1' pin 318 is completed before finger 321 has engagedl gear 328. After this first half of the axial reciprocation, a dwell occurs in such reciprocation to allow engagement of the finger 321 with the associated gear 328. As seen from the timing diagram, after such engagement and during the middle portion of the cycle, the pin 318 is returned to its initial position and the nger 321 being engaged with the gear 328 moves the gear 328 to effect entry of one increment in the aligned numeral wheel of the revolutions counter. After entry of this increment, the finger 321 is subsequently disengaged from the gear 328 so that at the end of the cycle of operation the parts are conditioned for carriage shifting if such an operation is desired.

If pin 38| is engaged with groove 351, the rst half of the axial reciprocation is a movement of finger 321 to the right as viewed from the front of the machine, so that a negative registration is effected. The operation of finger 321 under control of the pin 38| with reference to the rocking movement of finger 321 is similar to that described in connection with pin 318 and is also illustrated in the timing diagram shown in Figure 13. Thus, as the main shaft 83 rotates it lmparts to the shaft 32| an axial translation in either selected one of two directions to control the sign character of the registration on the numeral wheels 3|| in the revolutions counter, as outlined hereinabove.

s Revolutions counter control mechanism As previously described, values can be entered in the revolutions counter in either a positive or a negative sense despite the unidirectional movement of the drive means therefor. There is pro vided under the control of the operator a settable means which in conjunction with the plus and minus keys determines the sign character of a registration on the revolutions counter. This means takes the form of a lever 186 (Figure 7) projecting from the top of the machine and mounted on a pin 181. The lever '|86 is pivotally movable about the pin 181 between two positions, being retained in either position by a detent 188 which is pivoted as at 189 and is urged by a spring 19|, fastened to a pin 192 on the detent and a piu 193 on the plate 54, into either of two notches 184 and 186 formed in the lever 18E.

The lever is provided with an extended arm '191 which is bent into an axially sinuous and radially arcuate cam 198. This cam, while in one contour Figures 7 and 9) following the path of a radius about the pin 181, axially of the pin 181 is displaced with an inclined portion '|99 leading to the displaced portion. The cam portions operate in groove 88| on the shaft 381. lhus, as tne handle 186 is moved from one extreme position with the detent 188 in the notch 194 to another position with the detent 188 in the notch 196, the shaft 381 is moved axially between two extreme positions. Due to the length of the pin 383, as seen in Figure 9, such axial movement tent which in turn pivots about a pin 8| l. The

Between the collar 802 381 and the lever 386 at the other end of the a negative registration on the counter. If this relationship, due to the setting of the lever 186, is maintained when the plus key 40| is depressed, however, the slide 443 will then be translated toward the left in Figure 8 and the shaft 381 will be turned in an anti-clockwise direction, giving a positive registration on the revolutions counter. On the other hand, if the lever 186 is positioned rearwardly as shown in Figure 8 so that the pin B23 is in engagement with the notch al1, depression of the minus key 402 will still translate the slide 443 to the right in Figure 8, which, however, instead of producing a clockwise rotation of the I shaft 381, as before, will produce an anti-clockwise rotation thereof, so that a positive registration will be effected. Correspondingly, with this setting of the lever 186, depression of the plus key 40| will produce a translation toward the left in Figure 8 of the slide M3, and will cause a clockwise rotation of the shaft 381, so that a negative registration will be effected. Thus, for either positive or negative registration on the accumulator, values can be entered into the revolutions counter in either a positive or negative sense in accordance with the position of the lever 1.86.

I claim:

1. In a calculating machine, a revolutions counter comprising a row of numeral wheels, each numeral wheel being operatively connected to a gear, the axes of rotation of said gears being disposed parallel in the same plane, a cyclically operable actuator for said counter mounted for axial reciprocation and for oscillation about its axis, the axis of said actuator being disposed transversely with lrespect to said axes of rotation of said counter gears, a unidirectionally rotatable driving element, and means for driving said actuator from said element including selectively controllable means for imparting axial reciprocation thereto in one direction or the opposite to eiect rotation of said counter gears additively or subtractively, and including means for imparting oscillation to said actuator about its axis to e'iect movement thereof into and out of engagement with said counter gears.

2. In a calculating machine, a revolutions counter comprising a series of numeral Wheels, each numeral wheel having a gear for receiving increments of movement and a disc mounted for movement with said gear, said disc having a notch therein, and an actuator for said revolutions counter, means mounting said actuator for .both axial movement and, oscillation about its axis, the axis of said actuator being disposed transversely to the axes of rotation of said gears, means for operating said actuator including selectively controllable means for imparting axial reciprocation thereto in one direction or the opposite to effect rotation of said numeral Wheel gears additively or subtractively and including means for imparting oscillation to said actuator about its axis to effect movement thereof into and out of engagement with said gears, said actuator having a. tooth in the lowest order for actuating the gear opposite thereto upon operation of said actuator, a series of transfer elements mounted on said actuator for reciprocation therewith and individually urged resiliently to oscillate therewith, each of said elements having a finger cooperating with one of said discs and blocked thereby except during a transfer operation, each of said elements also having a tooth cooperating with the gear in the next higher order, the said notches in said discs being disposed so that in additive actuation of said counter upon initial oscillation of said actuator a finger enters the notch of its associated disc when the numeral wheel stands at 9 to permit the transfer tooth in the next order to engage its gear and so that in negative actuation of said counter upon initial oscillation of said actuator a finger enters the notch of its associated disc when the numeral wheel stands at 0, and means effective upon blocking of an element of lower order by the associated disc for restraining the similar elements of higher order.

3. In a calculating machine, a revolutions counter` comprising a series of numeral wheels, each numeral wheel having a gear for receiving increments of movement and a disc mounted for movement with said gear, said disc having a notch therein, and an actuator for said revolutions counter, means'mounting said actuator for both axial movement and oscillation about its axis, the axis of said actuator being disposed transversely to the axes of rotation of said gears, means for operating said actuator including selectively controllable means for imparting axial reciprocation thereto in one direction or the opfposite to eiect rotation of said numeral wheel gears additively or subtractively and including means for imparting oscillation to said actuator about its axis to effect movement thereof into and out of engagement with said gears, said actuator having a tooth in the lowest order for actuating the gear opposite thereto upon operation of said actuator, a series of transfer elements mounted on said actuator for reciprocation therewith and individually urged resiliently to oscillate therewith, each of said elements having a finger cooperating With one of said discs and blocked thereby except during a transfer operation, each of said elements also having a tooth cooperating with the gear in the next higher order, the said notches in said discs .being disposed so that in additive actuation of said counter upon initial oscillation of said actuator a nger enters the notch of its associated disc when the numeral wheel stands at 9 to permit the transfer tooth in the next order to engage its gearand so that in negative actuation of said counter upon initial oscillation of said actuator a finger enters the notch of its associated disc when the numeral wheel stands at 0, said transfer elements having an interlocking connection whereby blocking of an element of lower order by the associated disc will restrain all similar elements of higher order.

4. In a calculating machine, a revolutions counter comprising a series of numeral wheels, each numeral wheel having a gear for receiving increments of movement and a disc mounted for movement with said gear, said disc having a notch therein, a cyclically operable first tooth for engaging one of said gears opposite thereto to advance the associated numeral wheel one step for each tooth cycle, transfer means for said counter, comprising a series of transfer elements mounted on a cyclically operable actuator, means mounting said actuator for both; axial movement and oscillation about its axis, the axis of said actuator being disposed transversely to the axes of rotation of said gears, said transfer elements being mounted on said actuator for reciprocation therewith and individually urged resiliently to oscillate therewith, each of said elements having a finger cooperating with one of said discs and a tooth cooperating with the gear in the next higher order, the tooth of an element being restrained from engaging the associated gear when the nger of said element is blocked by the disc in the next lower order except when a transfer is to take place when upon initial oscillation of the actuator the finger enters the notch of the lower order disc permitting the transfer tooth to be positioned to engage the higher order gear so that upon axial reciprocation of the actuator the numeral wheel in the higher order is moved one step to effect the transfer, means effective upon blocking of an element of lower order by the associated disc for restraining the slmilar elements of higher order, and means i'or operating said actuator and for operating said first tooth to advance the associated numeral wheel one step after all unrestrained transfer element a finger enters the notch of its teeth-are positioned to engage their respectively I associated gears.

5. In a calculating machine, a revolutions counter comprising a series of numeral wheels, each numeral wheel having a gear for receiving increments of movement and a disc mounted for movement with said gear, said disc having a notch therein, and an actuator for said revolutions counter, means mounting said actuator for both axial movement and oscillation about its axis, the axis of said actuator being disposed transversely to the axes of rotation of said gears. means for operating said actuator including selectively controllable means for imparting axial reciprocation thereto in one direction or the 0pposite to effect rotation of said numeral wheel gears additively or subtractively and including means for imparting oscillation to said actuator about its axis to effect movement thereof into and out of engagement with said gears,.said actuator having a. tooth in the lowest order for actuating the gear opposite thereto upon operation of said actuator, a series of transfer elements mounted on said actuator for reciprocation therewith and individually urged resiliently to osciliate therewith, each of said elements having a nger cooperating with one of said discs and a tooth cooperating with the gear in the next higher order, the said notches in said discs being disposed so that in additive actuation oi' said counter .upon initial oscillation of said actuator a iinger enters the notch of its associated disc when the numeral wheel stands at 9 to permit the transfer tooth in the next order to engage its gear and so that in negative actuation of said counter upon initial oscillation of said actuator associated disc when the numeral wheel stands at said transfer elements having an interlocking connection whereby -blocking of an element of lower order by the associated disc will restrain all similar elements of higher order, and the lowermost transfer element having a similar interlocking connection with.- said tooth.

6. In a. calculating machine, a revolutions counter comprising a row of numeral wheels. each numeral wheel .being operatively connected to a gear, the axes of rotation oi' said gears being disposed parallel n the same plane, a cyclically operable actuator adapted to actuate said counter additively or subtractively, means mounting said actuator for axial reciprocation and for oscillation about its axis, the axis of said actuator :being disposed transversely with respect to said axes of rotation of said counter gears, cyclically operable means for'controlling engagement of said actuator with said gears by oscillating said actuator about its axis, means for controlling actuation of said counter gears by said actuator .by reciprocating said actuator, and selectively operable means for controlling the direction of reciprocation to determine additive or subtractive registration.

CARL M. F. FRIDEN.

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