US2310281A - Calculating machine - Google Patents

Description

Feb. 9, 1943. c. M. F. FRIDEN 2,310,281

CALCULATING MACHINE Filed Sept. 26, 1935 6 Sheets-Sheet l IN VEN TOR.

Car/ M F Fr/oen BY 69mg 7 4% A TTORNEY Feb. 9, 1943. c. M. F. FRIDEN CALCULATING MACHINE Filed Sept. 26, 1955 6 Sheets-Sheet 2 wk RN QQM N? R. M

m 5 mm INVENTORI. Car/ M. f Fr/oen BY WM 7/QZ ATTORNEY l mun-ml Feb. 9, 1943. c. M. F. FRIDEN CALCULATING MACHINE Filed Sept. 26, 1935 6 Sheets-Sheet 3 INVENTOR. Car/ M E Fr/oen ATTORNEY Feb. 9, 1943. c. M. F. FRIDEN CALCULATING MACHINE Filed 'Sept. 26, 1935 6 Sheets-Sheet 5 umw w w f NR 5 5 m 7 m \R g 3 WW .5

IN V EN TOR. Car/M F Fr/oe/v ATTORNEY Feb. 9, 1943. c. M. F. FRIDEN CALCULATING MACHINE Filed Sept. 26, 1955 6 Sheets-Sheet 6 M wfln n m m 0 mf MWW U a Patented Feb. 9, 1943 CALCULATING MACHINE Carl M. F. Friden, Oakland, Calif., assignor. to

Friden Calculating Machine 00., Inc., a corporation of California Application September 26, 1935, Serial No. 42,268

17 iClaims.

My invention relates to calculating machine having shiftable numeral wheels and more particularly to means for restoring such-numeral wheels to zero registration;

In calculating machines having an ordinally shiftable register carriage it is necessary at the end of a multiplication or division problem to return the carriage to its initial position and to zeroize the numeral wheels of the registers in preparation for solution of the next problem. In known machines, such functions have been performed separately so that the operator'must make two separate operations to condition the machine between successive calculations. According to the present invention, these functions are placed under a single control and the operator has only one operation to perform in restoring the register carriage to the desired position and zeroizing the registers. In addit on, the construction of the machine is such that while the carriage is being returned and the registers are being zeroized during operation of the actuating means, the next value can be entered in the keyboard.

My invention is especially useful in calculating machines having an actuator or actuating means of the universal operation continuous drive cycle type, where all power driven machine operations are performed under control of various means whose drive is effected by driving the main actuating means and where a single line of power flow is provided from the source of power, such power flow being continuous and uninterrupted during a machine operation irrespective of the various functions which may be imposed on the machine,

such as carriage shifting, both positive and negative value entering, and numeral wheel resetting or zeroizing. During certain of these operations such a carriage shifting and zeroizing, the drive connection between the numeral wheels and the actuating means is in its normal ineffective position. With this type actuator, a single cyclically operable clutch is provided which is engaged at the beginning of an operation and remains en gaged throughout the operation so that the actuator drive is continuous and uninterrupted.

It is an object of the invention, therefore, to provide improved means for restoring a calculating machine to normal condition between successive machine operations.

Another object of the invention is to provide an improved calculating machine which is restored to normal condition by operation of mechanism including the actuating means.

Another object of the invention is to provide an improved calculating machine in which values can be entered while the machine is being restored to normal condition by operation of mechanism including the actuating means.

Another object of the invention i to provide an improved calculating machine in which parts of the actuating means transmit the drive for all power driven machine operations.

Another object of the invention is to provide improved zero resetting means for the shiftable numeral wheels of a calculating machine which enables a simple and inexpensive construction.

Another object of the invention is to provide means for resetting the shiftable numeral wheels of a calculating machine by a power drive from a non-shiftable source of power, the construction of the resetting means lending itself to economical manufacture and assembly.

Another object of the invention is to provide improved means for resetting the shiftable numeral wheels of a calculating machine by a power drive from anon-shiftable source of power irrespective of the displaced position of the numeral wheels.

Another object of the invention is to provide improved shifting means for the shiitable car.- riage of a calculating machine.

Another object of the invention is to provide improved shifting means for the shiftable carriage of a calculating machine so that the carriage can be returned to a selected position from any other position thereof.

Another object of the invention is to provide a calculating machine having a universal operation continuous drive cycle type actuator and which attains the foregoing objects.

.' Another object of the invention is to provide improved safety devices for preventing misoperation of a calculating machine.

Other objects will be apparent from the following description, taken in connection with the appended drawings.

In the drawings:

Figures 1 through 10' illustrate the preferred form of the invention.

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.

Fig. 2 is a fragmentary plan view of the actuating means and the drive connections for the carriage shift and register zero resetting means.

Fig. 3 is an'elevational view of the right side frame member and the operating controls mounted thereon as viewed from the right. The register carriage is omitted.

Fig.

parts shown in section.

6 is a fragmentary vertical section through the carriage as is taken in a plane indicated by the line d-@ in Fig. 5.

Fig. 7 is a'plan view oi the right end of the carriage with the casing removed and certain parts broken away to show the construction more clearly.

Fig. 8 is a fragmentary sectional view of certain of the operating controls. The view is indicated by the line 87-43 in Fig. 2.

Figs. 9 and 10 are rear views similar to Fig. illustrating the zero resetting means at different stages of the operation thereof.

Figs. 11 through 13 illustrate a modified form of the invention.

Fig. ii is a fragmentary side elevational view of the control means similar to Fig. 3.

Fig. 12 is a fragmentary rear elevational view of the resetting means similar to Fig. 5.

Fig. 13 is a sectional view taken in a plane indicated by the line 53-43 in Fig. 12.

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

Generally, the machine comprises a frame and a carriage mounted for lateral shifting move ment on the frame. The carriage mounts the registers oi. 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 iii (Fig. l) which supports casing ii and has left and right side frame memi2, i3 (Figs. i and 2) mounted thereon. hide members l2, it are connected by various cross frame members it, ii, is and is which serve to mount various mechanisms referred to hereinafter. Register carriage 2? (Fig. l) is mounted on frame members it and it by rollers for endwise shifting movement laterally of the machine in either direction to various ordinal positions as controlled by means described here= inaiter.

Accumulator Register carriage 22 (Figs. 1 and 7) includes carriage frame at formed of opposite U-shaped members 82, 38 which are secured together by suitable fastening means such as screws. Sim-= ilar end plates 34 (Fig. '7) are secured to the ends oi frame 3i and support cross member 36 (Figs.

1 and 7) in spaced relation from frame 50. The accumulator comprises disk type numeral wheels 3i (Fig. l.) secured at the upper ends of numeral wheel shafts 32 (Figs. 1 and 7) journalled in spaced relation between members 82, 33 of caropenings, (13 by ten==tooth gear 66 on shaft 62 and a spring-pressed ball is mounted in carriage frame member 33 and engaged with gear d6. This mechanism also serves to prevent over= throw of wheels ii ait eractuation thereof. To W asiaasi transmit increments of value to numeral wheels i each shaft 32 extends below carriage frame 3i and has ten-tooth numeral wheel gear ll which is actuated by means described later.

Accumulator resetting means Means are provided in carriage 22 for resetting numeral wheels iii to zero registration which includes means for restoring any displaced wheels ill to zero position and means for arresting such wheels positively in zero position. The restoring means includes rack bar 5| (Figs. 1 and 7) mounted for endwise sliding .movement in carriage frame member: 33 adjacent the upper ends of numeral wheel shafts (12. The teeth of rack bar 5i (Fig. 7) are cut away at 52 alternately at the top and bottom to form a plurality of separate racks for cooperation with mutilated gears 53 on numeral wheel shafts d2. Adjacent gears 53 are axially ofiset to cooperate with the adjacent vertically ofiset racks formed on rack bar 58 by cut away portions 52' thereof. When rack bar 56 is in normal inactive position, gears 53 register with cutaway portions 52 so that numeral wheels ll can be actuated without interference. If rack bar 5i is moved to the right as viewed in Fig. '7, the unmutilated parts of gears 53 of any numeral wheels ll displaced from zero position will be engaged by the associated racks on bar 55 and such displaced numeral wheels ii are turned until restored to zero position. In this connection it will be noted that any numeral wheels ii in zero position will not be moved by rack bar 5i because the mutilated portions of gears 53 of such numeral wheel face the rack bar. For manual operation rack bar 5i is provided with handle 56 (Figs. 6 and 7) by means of which bar 5i can be actuated against the tension of a suitable spring (not shown) which normally maintains bar Si in inactive position.

The movement of bar 5G to the right as viewed in Fig. 7 to restore any displaced numeral wheels li to zero position also enables the means for arresting wheels (ii in such position. Stop slide 6i (Figs. 1 and '7) is mounted for limited end=- wise movement on top of carriage frame at by suitable pin and slot connections, and is pro= vided with a stop projection 62 (Fig. 7) for each numeral wheel ii. Each numeral wheel shaft d2 has a stop tooth 63 secured thereon for co= operation with projections 62 in the zero posi= tion of numeral wheels ii. Slide 5i is held normally in inactive position by suitable spring means (not shown) so each projection 62 is out of the path of the associated tooth 63. To pro= vide for movement of projections t2 into path of teeth as when zeroizing the numeral wheels, bellcranlr t l, pivoted at 66 on carriage frame at, has a suitable pin and slot connection at one end with slide 6! and has cam surface ti at its other and disposed in the path of arm 68 on rack bar 58. Thus, when bar 5i is moved to restore numeral wheels ii to zero position, slide ti is moved through bellcrank 6 3 to arrest wheels (ii in such position.

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

by carriage 22 comprises numeral wheels ii on respective shafts it, which are Journalled in carriage frame member 32 and cross member 38.

fem

di cfii.

wheel l is ordinal position oi the marriage. The each wheel ll (Fig. l) es, irisihteihecl with the essocietecl sight opemhgs o tee.

overtl'irow of humetel Revolutions counter rese -ing means Meehs are provided 101* resetting humeral wheels ll of the revolutions counter to zero, and such means s very similar to that described connection with accumulator numeral Wheels ll, u general description thereof will su'ilce. lltecls he: (Figs. l and 7), similar to reel: our 55, is hiouh'ed for ends-Ilse movement by Elm cls ll on carriage ume "member (Fig. "1) oh sh 1 outlet mutilated gee use essocietecl with so that movement of hisuipuletioh oi hahdle lit to the lit by serves to restore humeral Wheels zero position. Slide formed similarly to slide ill, i mounted tor cooperation with stop teeth 2 wheels ll end is spring; urged to ecti' e peel-- cu, being restreihecl thercilom by pie ch "oer The operation of the shove described zero resetting means is similar to that clescrlheel in cormecti o. with the uccumuletor resetting Interlock Au interlock is provided for the zero resetting means of ooth registers and the operating sou ttols for determining enteritis of velues in the i'eglsters. Looking slide (Figs. 6 1 ere ends through suitable slots in carriage frame ill closely ucljeceht ends of reel: hers El. and is urged to the "position shown by spring ill disposed in to slide shcl Halli foressecl between slicle and carriage soc-o position li; operation, being uncles siicle so. i. movement of slide so is preveuteei by virtue of its ihterei'iszegemeht with the oispleced car. At its left end, as viewed in Fig. 6 slide to hes extensionv 88 with which i h Q the reg sters is operated. iehsth 7) tion with member in shifted position oi "he cot resetting hers ll c b5 movement of sell all Eti'lil 4 i all such open sting controls can 1 operated. 'Cohve'l'selv,

' means thereforwhich see LQJSO, provided with zeroizihg rhesus "She actuating the carriage.

isle

to 9 and the right so h on such cylinder. jyliucl s (Figs. 3. and 2) ere mounted on actuating sholts l l'l having suitable bevel gear connections with transverse shaft etc which is suitably jou oiled in sioie members Each shaft serves f0]. two orders of the machine and; hes a. pair of cylinde s mounted thereon. Shel shafts are driven cyclical]; from (Fig. 1) thru clutch fill (Figs. 3 one e) driven by suitable gearing .rom s As explained in my ssicl co-pendiug' up cation, clutch is engaged or disengaged. oscillation oi sprihg urgecl clutch pet-vi or Eli (Fig. 4) mounted for rotation with shaft l and with respect to ratchet joumslleoi shaft 3 15, i

control lever: te mines engagement or :llseagoge clutch by releasing or lit in the full cycle position thereof.

From the above LlQSCTlDtiOi'l, it is so values set in the machine by depress $65 wi l i -ero mg the nose of oog dess is co.

s 1., machine tllru end jouroellecl cross member mediate members i s spool and 11 rotstoiolv ihou ed on each end has opposite bevel positioned Zor coo eict with no Therefore, men one or gears is, is engaged with :eers i Wheels will be i'otcterl i let lv or reversely to register a number of increments equal to ee value of the depressed keys in the oeulis of lze s.

To control the ehgsg'em (Fig. l) with able arms for recluse movement with Thus, by rocking shaft either set cam be si t I by str in lg. i into to o gears ll. UCEQ'S transmit 3o crements and gears lih'i transmit negative incregears I23, I24 and for simultaneously enabling the drive through clutch I I I, as for example, the plus and minus keys and the division control lever disclosed in said application.

Centralizing means is provided for resiliently urging strap I26 and gears I23, I24 to their central neutral position. For this purpose opposed arms 52! (Fig. 1) are pivotally mounted on side plate I2 with their upper ends engaging opposite sides of a pin 522 on a supporting arm for strap I26. Arms 52I are connected by spring 523 so that the arms yieldably resist movement of the plus-minus gears I23, I24 from their ineffective position shown in Fig. 1.

Transfer mechanism The number of actuations of accumulator numeral wheels M are registered either positively or negatively in counting numeral wheels 1! by actuator I36 (Fig. 1) which is driven and operated by conventional means such as cam drum I34 (Fig. 2) and cam disc I35 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 comprises a part of the actuating means for entering values into the accumulator. Carriage 22 (Fig. has plate I5I mounted along the rear side thereof by means of adjusting screws I52 threaded in brackets I53 on carriage frame 3| and having smooth ends pivotally engaged with laterally projecting end portions I54 of plate I5I. Plate I51 has vertical slots I51 formed in the lower edge thereof by teeth I58, slots I51 being spaced apart a distance equal to the ordinal spacing of the machine and. aligned with drive shafts I2I. Slots I51 are adapted for engagement by opposite shift pins I6I on shift gear I62. Gear I62 is journalled on cross frame member I6 and is rotated by means described later to shift the carriage by virtue of the engagement of pins I6I in slots I51; such engagement also serves to lock the carriage in position. One half revolution of gear I62 effects one ordinal spacing of carriage 22 and to provide for accurate centering of the carriage at the end of a shift, centralizing cam I63, is mounted for rotation with gear I62. Centralizing arms I64 suitably pivoted at one end on frame member I6 have suitable rollers at their opposite ends engaging opposite sides of cam I63 under the influence of spring I66 tensioned between arms I64. When pins I6I 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 I63. Accurate initial positioning of carriage 22 with respect to pins IBI is provided by adjusting screws I52, which are adjusted with the parts positioned as described.

The manual release of the carriage for free shifting movement is effected by rocking plate I51 out of engagement withpin I6I of shift gear I62. Plate I5! is maintained resiliently in operative position by spring I66A (Fig. 6) tensioned between carriage frame 3| and end extension I61 of plate I5I. Carriage release handle I68 (Figs.

5 and 7) is journalled in carriage end plate 34 in axial alignment with screws I52 forming the pivotal axis for plate I5I, and has its inner end rigidly but removably connected to the bent end of extension I61 of plate I5I. Thus by tuming handle I68, plate I5I can be moved out of engagement with pins I6I to permit free shifting movement of the carriage. To prevent simultaneous operation of carriage release handle I68 and any operating control which determines entering of the values in the registers, extension I61 (Figs. 6 and 7) of plate I5I has arm I69 secured thereon with its bent end normally positioned above locking slide 86 as shown in Fig. 6. If handle IE8 is operated to release the carriage, arm I69 moves into the cooperating recess in slide 86 formed by projection I10 thereof, thereby blocking movement of slide 86, bail iii and locking member 93. Conversely, if such an operating control be manipulated, projection I10 is moved beneath arm I69 to prevent operation of carriage release handle I68. It is seen from the above description that the carriage cannot be released for free shifting movement if a value is being entered in the registers, and, conversely, if the carriage is so released the value entering operating controls cannot be operated.

Resilient bumper means is provided for preventing shifting of the carriage beyond its left hand end position, to which it is usually returned to begin a calculation. Bumper lever I12 (Fig. 5) is pivoted at I12 on cross frame member I6 and has its upper end positioned for engagement with the head of left adjusting screw I52 (to the right as viewed in Fig. 5) when the carriage is in its left end position. The lower end of lever I1I is notched at I13 for engagement by the nose of centering arm I14 under the tension of spring I16. Arm I14 is pivoted eccentrically at I11 to provide for accurate positioning of bumper lever I11 Thus, centering arm I14 maintains bumper lever I1I resiliently in place. The movement of lever I11 when struck by the carriage is limited by the engagement of abutment I18 thereof with the top of left side frame member I2. 1

Yieldable means are provided to prevent shifting of the register carriage beyond the lowest and highest ordinal positions thereof during power operation of the shifting means. End slots I51 are formed in part by end teeth I58 and in part by respective pawls ISI, I82. Pawls I8I, I82 are pivoted at I83, I84, respectively on plate I5I and extend inwardly to' position the straight end edges thereof opposite end teeth I58 to form end slots I51. Pawls I8I, I62 are held resiliently in the position shown against respective stop pins I86 by spring I81 tensioned therebetween. When carriage 22 is in the end position shown, one pin I6I lies in an end slot I51 and the other is positioned beneath adjacent pawl I82 in engagement with cam edge I68 thereof. In

this condition rotation of gear I62 in a direction to move the carriage beyond the end position merely results in oscillating pawl I82 by action of pins I6I on cam edge I88. However, upon rotation of gear I62 in a direction to effect carriage shifting to an intermediate ordinal position, the end edge of pawl I82 positively resists the pin I6I gear I62 in end slot it? and carriage shifting; res its l similar action occurs if the carriage is its position adjacent pawl i851. it is seen, the that the carriage cannot be shifted beyond either in? position thereof by operation of slnit As stated above, shift iiii is rotatable either direction by selectively operable drive con nections with actuating means of the rnachine. For this purpose, the two lowest order actuating shafts 30'! (Fig. 2) are extended rearwardly and have respective collars 20! secured adjacent the ends thereof. Each collar it! is provided with opposite slots slidablv engaged by corresponding teeth 202 or a shiftable drive es tablishing collar 203 mounted freely on the end of shaft Hi'l. Opposite teeth 2B2 thereof, each collar 203 has smaller teeth 2% adapted for em easement with corresponding slots in respective gear sleeves 20B, 201, which are journalled in cross frame member l6 and small plate 233 mounted on member 56 by suitable spacers and fastening screws. Gear sleeve Hit? (Figs. 2 and 5) has gear 21! meshing with idler gear till (hi 5) journalled in frame member iii and plate 208 and also meshing with shift gear W2. Gear sleeve 20! (Figs. 2 and 5) has gear M3 (Fig. 5) offset axially from idler gear M2 and meshing with wide reverse idler gear 2 suitably jour nailed in frame member l6 and plate 2nd and also meshing with idler gear 212. Thus, rotation of gear sleeve 2% in a clockwise direction as viewed in Fig. 5 causes clockwise rotation of shift and shifting of carriage 22 to th left as viewed from the front of the machine. Corre spondingly, rotation of gear sleeve in clock wise direction as viewed in Fla. 5 effects counterclockwise rotation oi shift gear it? and shifting of carriage 22 to the right as viewed from the front of the machine. Thus, by selective establishing of drive connections between sear sleeves 208, 20"! (Fig. 2) and collars mi awn selective shifting of respective si. ,ii'ie collars riage 22 can be shifted in either direction. gear ratios are so chosen that one rotation of actuating shafts iii? effects one-half rotation of shift gear I67.

Manually operable control means are provided The for the carriage shitting mechanism described above to enable selective shifting oi the carriage in either direction. through one or more ordinal. spaces. Shift keys 22L 222 (Figs. 3 ii) are depressible to initiate shifting of the carriage to the right and left respectively as viewed from the front of the machine, and as indicated the arrows. Depression of either key serves to enable a drive connection. from the actuating means to the carriage shifting mechanism do ing the first part of its dowritvard movement and thereafter to engage the clutch and energize the motor. Keys 2', 222 (Fig. 3) are mounted for endwise movement by suitable longitudinal slots formed therein and engaged by a plurality studs 223 secured on side member iii. Keys 22!, 222 have adjacent ears with spective studs 22?, 22% mounted therein and en: tended to either side thereof. To maintain shift keys resiliently in raised "ition, coil spziu 13! (Fig. 8) is provided having its taste to side member i3 and passing over upper studs 223 and under the ends of studs 2231, 22c which extend through suitable slots in side member it. To enable the drive connection from the actuat== ing means to the carriage shifting mechanism stud 221 engages the upper end of arm .232 se ill that depression of key in a clockwise dirrectic 250 will resul" and is r a spring compressei and a suitable washer on rod end, rod 233 (Fig. 2) shift to thereon with its. forked end in enga an annular groove in right hand sin 2%. lrrom the foregoing descr t stud 2227i to rock arm 232, A to move rod rearwardly movement of rod 238 is ei'iec" iorl; Hi to engage teeth of collar 2% with corresponding 207. Thus, initial depression of shift effected to enable drive actuating means to the I nism. The drive cennectionh. 201 and its associated collar shifting of the carriage to rig-ht. A similar mechanism is employed tion with shift key 222 to enable nection to determine shifting of the c the left. Stud 3) is c in sonnet:

is: is

We upper end of arm 2% having its hub s shaft 2%. At its ii i" l it e ait depending aim T l therefore, that depression of lrey reciting of shaft rearward rod to engage lei shift co co s amount of moveme" 294 with the co so that slots in we connection is e of the dorms/"arr." movelever by nivot S and by pin and nection ha' e5" suitable clamping maintaining" relative d vers 24 5i, lever either oi keys ter gee rt oi the motelat its upper end lint: clutch control iii which adapts 328 respectively. For exam ple, in key E23 pressed, lock portion 262 moves into blocking position beneath stud 228. Shift keys 221, 222 are also suitably interlocked with the plus anctminus keys for determining positive and negative value entering as fully disclosed in my copending application, Serial No. 27,338, filed June 19, 1935.

Means are provided for maintaining the drive connection from the actuating means to the carriage shifting mechanism throughout each cycle of movement even though the depressed shift key be released immediately after depression thereof and before complete shifting of the carriage. For this purpose each shiftable collar 203 is provided with a similar mechanism, only one of which will be described. Right-hand shiftable collar 203 (Fig. 2) is provided with disc 211 having a cut away portion 212 which, in the full cycle position of collar 203,-is in the position illustrated in Fig. 5. Immediately to the rear of disc 211, 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 211 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 cutaway portion 212. Upon subsequent rotation of disc 211 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 irrespective of release of the associated shift key. Left hand shiftable collar 203 is held in drive establishing position for each cycle of rotation by similar mechanism. 4

From the foregoing description it is seen that keys 221, 222 and the associated mechanism provide means for shifting the carriage selectively in either direction from one ordinal position of the carriage to another. Obviously, if a shift key be maintained in depressed position, shifting will continue until the carriage reaches an end position, .when, as previously. described, continued operation of the shifting mechanisminthesame direction becomes inefiective."

Add key release mechanism In operation of the machine, it is usually de sirable that the add key, which in active position causes release of all depressed numeral keys after a single actuation, be disabled during operations, such as division, involving shifting of the carriage as a usual preliminary to the operation. To effect this end, means are provided under control of the shift keys for disabling the addkey. Add key 281 (Figs. 3 and 8) is mounted for endwise and pivotal movement on side member 13 by stud 282 (Fig. 3) which engages a slot adjacent the lower end of key 281. Key 281 is held normally in raised inactive position by spring 233, which also serves to maintain notch 284 in key 201 engaged with pin 286 to latch key 281 in depressed position. In its depressed active positionkey 281 positions arm 281 in blocking relation to lug 288 of division setting-slide 239 as fully disclosed in my co-pending application Serial No. 35,619, filed August 10, 1935. The mechanism for releasing automatically any depressed numeral keys 101 under control of key 281 is fully disclosed in said application Serial No. 724,482. To release add key 281 upon depression of one of shift keys 221, 222, lever 291 (Fig. 8) is pivoted at 292 on side member 13 and has one arm 293 disposed beneath and spaced from studs 221,228 of shift keys 221, 222 and the other oifset arm 294 with its laterally projecting end. in operative relation with cam surface 230 of key 281, when key 281 is in raised position. With the parts positioned as illustrated in Fig. 8, depression of either of shift keys 221, 222 produces no movement of lever 291. However, when add key 281 is depressed, lever 291 is rocked in a clockwise direction as viewed in Fig. 8 to place arm 293 thereof immediately below studs 221, 228 Thus, if add key 281 is depressed, during the first part of the downward movement of either of studs 221, 228 caused by depression of a shift key, lever 291 will be rocked in a counter clockwise direction (Fig. 8) to move add key 281 to the left as viewed in Fig. 3 and disengage notch 284 and pin 286. Spring 283 then becomes effective to raise add key 281 to its inactive position. It is seen, therefore, that if the add key is depressed.

depression of a shift key serves to normalize the add key by restoring it to raised inactive position.

Normalizing mechanism As stated in the introduction, means are provided for restoring the machine to normal condition between successive operations. The restoring being effected by returning the carriage to its left hand position and by resetting the accumulator to'zero after its return to such position. Both of these functions are controlled by a single manipulable member which is operated by a single manual stroke. Also, while the machine is being normalized, the value desired can be set in the keyboard for the next operation.

Carriage return and register resetting key 311 (Fig. 3) 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 operaleased. Key-311 is mounted on side member 1.3- --ad'jacent shift key 222 for substantially endwise at 313 team 314 (Figs. 3 and 8) on shaft 318.. "Key 311 is urged to its raised position by spring 311 (Fig. 8) secured to extension 318 of arm 314. Intermediate its ends, key 31 1 (Fig. 3) is provided with latching notch 321 for cooperation with latching slide 322. In the raised position of key 311, slide 322 has its nose engaged with cam surface 323 on key 311 below notch 321. Slide 322 is mounted for endwise sliding movement by means of pin 324 engaging a slot at the front end of slide 322 and by a pivotal connection at its zero resetting drive means. The zero resetting drive member comprises slide 331 (Figs. 2 and 5) mounted for endwise movement on frame member 10 by brackets 332. Slide 331 has vertical projection 333 terminating in lateral extension 334 which comprises the active part of actuating slide 331. When carriage 22 is in its left end position as illustrated in Fig. 5, extension 334 is arm 336 to the position shown with pin 343 engaged with a surface of carriage frame member 33. With the parts positioned as illustrated in Fig. 5, it is seen that upon movement of slide 33! to 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 42 in the manner previously described.

. The means for actuating slide 33! (Fig. 5) includes arm 35! pivoted at 352 on plate I6 and having a slot at its upper end engaged by pin 353 on slide 33!. Intermediate its ends, arm 35! has roller 354 joumalled thereon for cooperation with cam 356 under the influence of spring 351. Cam 356 (Fig. 2) has hub 358 journalled in plate I6 and in small plate 36! mounted in spaced relation to plate I6 by suitable spacers and studs. Hub 358 of earn 356 extends thru plate I6 and has opposite notches 362 for cooperation with corresponding teeth 363 of collar 364 shiftably mounted on the end of an actuating shaft I81. Opposite teeth 363, shiftable collar 364 has similar 't'eth 366 constantly engaged with corresponding notches" in' collar-361 secured on said actuating shaft I01 adjacent thdendthereof. Shiftable collar 364, therefore, provides means for establishing a drive connection from the actuat ing means to the zero resetting drive member. Collar 364 has an annular groove to receive shift fork 31! mounted at the rear end of rod 312 which is supported for endwise sliding movement in cross members I1, I8. Rod 312 is spring-urged to its forward position by spring 313 in the same manner as rod 238 and spring 238 of the carriage shifting mechanism. The front end of rod 312 is normally engaged with radial end surface 316 of arm 311 (Figs. 1 and 2) secured on shaft 3I6 which is movably supported in side members I2, I3. Arm 311 (Fig. 1) has a second radial end surface 318 of greater radius than surface 316 and connected thereto by a suitably inclined surface. Thus, clockwise movement of arm 311, as viewed in Fig. 1, causes endwise movement of rod 312 until it is engaged with surface 318. It is seen, therefore, that depression of return and reset key 3!! serves, by rocking shaft 3I6 and arm 311, to engage teeth 363(Fig. 2) 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 key 3!! is latched in depressed position, such drive connection will remain enabled-until release of the latch as described hereinafter.

To initiate the carriage return determined by depression of key 3!!, shoulder 38! (Fig. 3) is provided on key 3!! overlying lug 382 of shift key 222. Thus, depression of key 3!! also causes depression of shift key 222 and initiates a shifting operation as described in connection with key 222. Because key 3!! is latched in depressed position, carriage shifting will continue until return of the carriage to its left end position.

As stated above, and it will be more apparent from the description of the operation, the carriage is returned to its end position if displaced therefrom, and the next revolution of the actuating means is efi'ective to reset the accumulator to zero and to release the latch for key 3! I. To effect the latch release, pawl I82 (Fig. 5) has arm 38! terminating in shoulder 382 and latch releasing extension 383. Extension 393 overlies cam surface 384 (Fig. 3) of latch releasing member 326 which is pivoted at 386 on side member I3. It will be recalled that with the carriage in the end position shown in Fig. 5, pawl I82 is oscillated during each cycle of operation of the actuating means by the engagement of a pin I 6! with cam surface I88. As arm 38! of pawl I62 moves downwardly shoulder 382 moves into operative engagement with side member I3 and extension 383 contacts cam surface 384 (Fig. 3). The engagement of shoulder 382 with member I3 blocks unnecessary movement of the carriage because of the actuation of resetting bar 5!, and the engagement of the extension 383 with cam surface 384 rocks latch release member 326 so that latch slide 322 is moved to the right to release key 3! I. Spring I81A aids spring I81 in restoring pawl I82 quickly to the position shown.

Operation The operation of the normalizing mechanism will now be described. Return and reset key 3! I (Fig. 3) is depressed and is latched in depressed position by slide 322. The depression of key 3!! thru arm 3, shaft 3I6 (Fig. 7) and arm 311 moved rod 312 rearwardly to engage shiftable collar 364 with cam hub 36!. The drive con- I nection for the zero resetting drive member is lug 382 also .depresses shift key 222 to enable the carriage shifting mechanism for shifting the carriage to the left. Such depression of shift key 222 engages the clutch and enables the motor circuit. If"th,e carrlage is positioned in its left end or lowest order position as viewed from the front of the machine, depression of shift key 222 merely serves to enable the drive for one cycle of operation. During this cycle, slide 33! (Fig. 5) actuates resetting bar 5! to restore numeral wheels 4! to zero registration, and a pin I6! oscillates pawl I82 to actuate latch releasing member 326 to unlatch key 3!! and thereby shift key 222. However, if the carriage is displaced from such left end position, shifting of the carriage to the left (as viewed from the front of the machine or to the right as viewed in Fig. 5) follows as well as reciprocation of arm 35! and slide 33!. The reciprocation of slide 33! is inefiective until the carriage is returned to its left end position because the carriage is positioned so that arm 336 is not engaged by extension 334 of slide 33!. Fig. 9 illustrates the condition of the parts when the carriage is moving into its next lowest order position. In such position the inclined end of pawl 338 has engaged ledge 342 so that pawl 338 and arm 336 have been raised by ledge 342 to position the end of arm 336 above extension 334 of slide 33!. It will be noted that slide 33! is in its extreme left hand position and the extent of movement is such that arm 336 and resetting rack bar 5! would be actuated slightly if arm 336 were not raised.

Fig. 10 illustrates the parts as positioned in the cycle of operation when the carriage is being shifted from the next lowest order position to its lowest order or left end position. Thus, pawl 338 has moved off of ledge 342 and allowed arm 823% to fall, the end thereof resting on actuating extension 334 of slide 33!. During the remainder of the last shifting cycle, the parts move from the positions shown in Fig. 10, to those illustrated in Fig. 5. During such movement arm 3% drops to active position so that the next reciprocation of slide 33! is effective to engage extension 334 with arm 335 and effect the resetting operation. Also, during this cycle, pawl 582 is oscillated to actuate latch releasing member 326 and release key 3 so that key 3 and shift key 222 are free to rise and the operation stops at the end of that cycle.

Thus, depression of key 3 initiates 9. normalizing operation which includes the returning of the carriage to its left hand or home position, resetting of the accumulator and release of key 3| I. It is to be noted that during such operation, keys NH (Fig, 1) can be depressed to change the positioning of gears I03 with respect to teeth Hit of actuating cylinders I01 in accordance with the desired value for the next succeeding operation. Obviously, by omitting the connections of key 3 with the zero resetting drive mechanism, such key would serve as a carriage return key only.

If desired, register wheels H of the revolutions counter can be cleared simultaneously with numeral wheels 4i of the accumulator and manipulable means are provided for connecting the resetting mechanisms of such registers together for simultaneous operation. For this purpose rack 16 (Figs. 6 and '7 is provided with connecting member 40! pivoted at 402 on bar 16. Member 40! has bent extension 403 which is normally positioned below bent end 404 of member 68 on rackbar 5!. Extension 403 is maintained in such position by bent arm 406 of member lei which extends across bar 16 and is normally engaged with the low portion of inclined cam surface Ml'l of control slide or member 508. Spring tee maintains arm 336 in engagement with cam surface 401, being tensioned between arm 406 and a pin on rack bar 16. Member 408 is slotted to engage studs iii on frame member 36 to provide for endwise movement thereof and has handle portion M2 which extends through the carriage casing to thereof. Upon movement of slide 408 to the right from the position illustrated in Fig." 7, arm 6% of connecting member 40f moves up cam surface dill against the urgency of spring 609 to rock connecting member Bill and position ex tension 03 thereof in the path of extension Mid of member 68 on rack bar 55. Thus, rack bar it can be connected for simultaneous movement with rack bar 5i so that power resetting of both registers can be effected simultaneously by depression of key 3i i.

Modified power resetting mechanism Figs. 11 through 13 illustrate a modified form of the invention in which shiftable registers can be reset to zero registration independently of the carriage shifting operation and in any displaced position thereof. Such resetting is effected by a zero resetting drive member which is normally out of operative relation with the resetting mechanism in the carriage. Zero resetting key 50E (Fig. 11) is generally similar to key 3 and depression thereof serves to enable the drive connection from the actuating means to the zeroresetting drive member. Key SM is mounted on side member It by stud 3i? and-arm 386 in the same manner as key 3 and operates similarly same manner.

provide for manipulation v through arm 34 3 to establish the drive connection from an actuating shaft I01 to cam 35% (Fig. 12). To enable the motor circuit and engage the clutch, key 50l (Fig. 11) has cam extension 5632 disposed in operative relation with pin 503 on clutch control lever 50d, which is generally similar to lever ll? of Fig. 4 and opcrates to control clutch IH (Fig. 11) in the Lever 504 is connected by link 256 to lever 252 (Fig, 3) which through lever 25! controls the engagement of contacts 259 of the motor circuit. Thus, depression of key 50! establishes a drive connection from the actuat ing means to the zero resetting drive member and enables the drive for the actuating means. It is to be noted that key 50f (Fig. 11) is not latched in depressed position and exerts no control over shift key 222.

The zero resetting drive member is adapted upon depression of key 5M to effect zero resetting of the accumulator in any displaced position thereof. Zero resetting rack bar 51 (Figs. 12 and 13) is identical in construction and operation as previously described except that means is associated therewith for operation by the zero re setting drive member on placed position of the carriage. Such means comprises strap E06 mounted on bar 51 by means of spacers 501 and screws 508. Strap 506 has a plurality of ordinally spaced projections or lugs 509, one for each ordinal position of the carriage. Lugs 509 are each positioned for operative relation with lateral actuating extension 5| I on slide 5l2. To provide for endwise movement of slide 5H, slots 5I3 therein are engaged by studs 5 on frame member It. It will be noted that extension 5H in its inactive position is below lugs 609 to provide for unimpeded shifting of the carriage. To provide for movement of extension Bil into active position at the first part of the reciprocation thereof, slots SIS have upwardly slanted end portions 516 in which' studs bi l are normally positioned. Upon depression of key 50! and subsequent rotation of cam 356, arm 35! moves slide 5l3 to the left. Slide 5|! and extension 5 first move upwardly and to the left so that extension 5| l engages a lug 50d. Thereafter the movement of slide 5l2 and extension 5H is linear and strap 508 and rack bar 5i are moved therewith to effect resetting of the accumulator. Upon return movement of slide 5E2, extension SM is restored to the position illustrated in Fig. 12 below lugs 509. Thus, the accumulator can be zeroized in any shifted position of the carriage by manipulation of key 50!. The revolutions counter can be zeroized simultaneously with the accumulator as described in connection with the preferred form of the invention.

1, therefore, claim as myinvention:

1. In a calculating machine, a'shiftable register, actuating means therefor, driving means for said actuating means, means for shifting said register with respect to said actuating means by operation of said actuating means, means for resetting said register to zero registration by operation of said actuating means, and a manually operable control key for said driving means, said shifting means and said resetting means.

2. In a calculating machine, a frame, a register shiftable on said frame, actuating means on said frame for said register, zero resetting means associated with said register and shiftable therewith, a drive member on said frame having a drive connection with said actuating means and positioned for cooperation with said resetting the frame in any dis asiopsi us one position of said register, and control luding a manually operable hey for onv drive connection and for causing operation oi said actuating means.

in s calculating machine, a frame, a regisshiitable on said frame, actuating means on i sitioned for cooperation with said resetting means in one position of said register, means for shifting said register, and control means includmanually operable key for determining operation of said shifting means and said actuating means and for enabling said drive connection.

In a calculating machine, a shiitable regisectuating means for said register, drive means said actuating means including a source of power and a cyclically operable clutch providing the only path of power flow from said source of power, means for shifting said register with reto said actuating means having a normally disabled drive connection with said actuating means, means for resetting said register to zero ""sistration having a normally disabled drive conii-on with said actuating means, and selective control means for said clutch and for said drive connections between said actuating means and said shifting and resetting means.

ii. in a calculating machine, a frame, a regiso1 mounted for endwise shifting movement on aid frame, a source of power, means driven from "d source of power for shifting said register, neans driven from said source of power for ree'tting said register to zero, and control keys for ,d shifting and resetting means in cooperative relation to enable simultaneous operation thereof.

a. in a calculating machine, a frame, a regismounted for endwise shifting movement on frame, a source of power, means driven from said source of power for shifting said register, a shift key on said frame for controlling said shiftg means, means driven from said source of for resetting said register to zero, and a resetting control key for said resetting means ounted on said frame adjacent said shift control to provide for simultaneous manipulation 3h eef whereby to cause simultaneous operating or said resetting and shifting means.

7. in a calculating machine, a shiftable register, cyclically operable actuating means for said register, drive means for said actuating means including a source of power and 9, cyclically operis clutch providing the only path of power flow rrorn said source of power, means for shifting s id register with respect to said actuating means including a normally disabled drive connection "with said actuating means, means for resetting said register including a normally disabled drive connection with said actuating means, said shiftii g means including yieldable means for prevent- -ng shifting of said register. past an end position thereof irrespective of continued operation of said shifting means, and a. control key for engaging said clutch and enabling said drive. connections reby to effect return of the register to an end position and then to effect resetting of said reg- 1 during an overdrive cycle oi said actuating sans after the completion or the shifting operation.

in a calculating machine, a frame, a register sl table on said frame, resetting means asso ed with said register and shiitable therewith, drive means positioned on said frame for cooperlatching means during resetting of said register while in said end position.

9. In a calculating machine, a frame, a carriage mounted for endwise shifting movement on said frame, a register on said carriage, resetting means for said register on said carriage, actuating means on said frame ior said register, means for shifting said register driven from said actuating means, normally disabled drive means on said frame for said actuating means, and means including a manipulable control for enabling said drive means and for first causing shifting of said carriage to an end position and then for causing operation of said resetting means to effect reset-- ting of said register in said end position, said resetting means including a settable control element for disabling operation of said zero resetting means whereby with said settable element in active position operation of said manipulable control causes positioning of said carriage in said end position without resetting of said register.

10. In a calculating machine, a shlftable register, actuating means for said register including a plurality of parallel actuating shafts, drive means for said actuating means including a source of power and a cyclically operable clutch, means for shifting said register with respect to said actuating means including 9, drive element in axial alignment with one of said actuating shafts and shittable means for establishing a drive connection between said drive element and said one shaft, means for resetting said register to zero registration including a second drive element mounted in axial alignment with another of said actuatlngshaits and shiftable means for effecting a drive connection between said second drive element and said another actuating shaft,- and selective control means for said clutch and for said respective shlftable means.

11. In a calculating machine, a shiitable register, actuating means for said register, drive means for said actuating means including source of power and a clutch, said actuating means including means settable to be ineficctive to enter values in said register, selecting mechanism Ior entering values into said machine for entry in said register by said actuating means, and selectively operable means having a drive connection with said actuating means for resetting said register to zero registration with said actuating means in normal motion and operative to transmit a drive through said drive connection but ineffective to enter values in said register, said selecting mechanism being conditioned for value entering operation during resetting operaticn or said actuating means, and a control key for said selectively operable means operable to engage said clutch and'enable said drive connec tion.

12. In a calculating machine, a frame, a reginter shlitable on said frame, cyclically operable actuating means on said frame for said register, drive means for said actuating means including a source of power and a clutch, zero resetting means associated with said register and shiftable therewith, a drive member on saidframe posi= tioned for cooperation withsaid resetting means in one position of said register, a controllable drive connection between said drive member and a part of said actuating means, means for shifting said register by cyclic operation of said actuating means including a controllable drive connection between said shifting means and a part of said actuating means, and control means for determining operation of said shifting means to place said register in said one position if displaced therefrom and for determining operation or said drive member, said control means including a manually operable lrey having controlling connectiori with said clutch and said drive connections.

l8, In a calculating machine, a frame,a register shiftable on said frame, cyclically operable actuating means on said frame for said register, drive means for said actuating means including a source of power and a clutch, resetting means associated with said register and shiftable therewith, a drive member on said frame positioned for cooperation with said resetting means in one position of said register, a controllable drive connection between said drive member and a part of said actuating means, means for shifting said register by cyclic operation of said actuating means including a controllable drive connection between said shifting means and a part of said actuating means, control means including a manually operable key for determining operation of said shifting means to place said register in one position if displaced therefrom and for determin-- ing operation of said drive member, and means enabled by said hey upon operation thereof for latching said key in active position.

14. In a calculating machine, a frame, a register shiftable on said frame, cyclically operable actuatingmeans on said frame for said register, drive means for said actuating means including a source of power and a clutch, resetting means associated with said register and shiftable therewith, a drive member on said frame positioned for cooperation with said resetting means in one position of said register, a, controllable drive connection between said drive member and a part of said actuating means, means for shifting said register by cyclic operation oi said actuating means including a controllable drive connection between said shifting means and a part of said actuating means, control means including a mam asiaasi ually operable key for determining operation of said shifting means to place said register in one position if displaced therefrom and for determin. ing operation of said drive member, means for preventing operative engagement of said drive member with said resetting means until said register is positioned in said one position by operation of said shifting means, means for latching said key in active position, and means for disabling said latching means during the cycle of operation of said actuating means in which said drive member operates said zero setting means.

15. In a calculating machine, a frame, a register, carriage" carrying said register shiftable on said frame to a plurality of operating positions, actuating means for said register, drive means for said actuating means including a source of power and a clutch, controllable means having a normally inactive drive connection with a part of said actuating means for returning said carriage to an end position thereof from any other position thereof, and control means for said returning means including a key operable by a single manual stroke to engage said clutch and enable said drive connection.

16. In a calculating machine having a frame, a register mounted for endwise shifting movement on said frame, resetting means for said register, and shifting means for said register, in combinatlon with register return and resetting means for controlling simultaneous operation of said shifting and resetting means to cause resetting of register and return of said register to an end position if displaced therefrom, said controlling means including a resetting control key and a shift control lrey mounted on said frame in juxtaposed relation for simultaneous depression by a single manual stroke.

17. In a calculating machine having a shiftable carriage, a register in said carriage, in com= bination shifting means for said carriage including a key, resettingmeans for said register including a second key mounted in juxtaposed relation to said first key for simultaneous operation therewith, and means responsive to depression of both of said keys for initiating operation of both said shifting and resetting means to cause resetting of said register and to invariably cause shifting of said carriage to an end position thereof, whereby said register is positioned in said end position and stands at zero registration. 1

CARL M. F. 1w

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