US2403273A - Calculating machine - Google Patents

Description

July 2, 194& c. M. FRIDEN ETAL 2,403,273

7 V CALCULATING MACHINE v Filed Jan. 27, 1940 10 Sheets-Sheet 1 F 'JLE 'L inventors J an M. FE/DEN H AN ON) 5. MACH/706 y 2, 1946 c. M. FRIDEN Em 2,4032% CALCULATING MACHINE Filsd Jan. 27, .1940 1Q Sheets-Sheet 2 INVENTORS C/JEL M. I E/DEN Y i m BY ANTHONY 5. MACH/400 QZZDM/ v ATTORNEY y 1945- c. M. FRlDEN ETAL 2,403,273

CALCULATING MACHINE Filed, Jan. 27, 1940 10 Sheets-Sheet 3 F'- 1 E? Q INVENTORS c7221 M. F'E/DEN N ANTHONY a. MHCHADO BY 2 E z ATTORNEY July 2, 1946.

c. M. FRIDEN ETAL QALCULATING MACHINE Filed Jan. 27, 1940 10 Sheets-Sheet 4 H mm mmm m IMN O mm CN A ATTORNEY July 2, 1946. c. M. FRHDEN ETAL CALCULATING MACHINE Filed Jan. 27, 1.940

10 Sheets-Sheet 5 ATTORNEY fi Y T m B w a Na 8N .BN Q 5 g Q E RN B E .3 N kiln. N Q J \I u T .N? 4 2 4% Q L V a W E 9 fia SEE & N91 fig y J 5 5 l July 2, 1946. I c. M. FRIDEN ETAL CALCULATING MACHINE Filed Jan. 27, 1940 10 Sheets-Sheet 6 INVENTORS 'CAEL MJ-E/DEN ,q/vma/vy a. wmc/mao BY all 1 My ATTORNEY July 2, 1946. c. M. FRIDETN ETAL CALCULATING MACHINE Filed Jan. 27, 1940 10 Sheets-Sheet '7 FE/DEN MACH/400 Enventors mm M ANTHONY a.

(Ittorneg G. M" FRIDEN EFAL.

CALCULATING MACHINE Filed; Jan 27, 1940 1,0 Sheets-Sheet B m fi miwphmnl INVENTORS CARL M. FIE/DEN ANTHONY a. MRI/M00 {A/ MW ATTORNEY July 2,, 1469 c. M. FRlDEN ET AL I Q 2,403,273

CALCULATING MACHINE Filed Jan. 27, 1940 10 Sheets-Sheet 9 F Ill-El ..J E

INVENTORS CHE! M. FE/DEN HNTHONY 5. MACH/400 BY I Q 2 TTORNEY July 2, 1946 C. M. FRIDEN ETA!- CALCULATING MACHINE Filed Jan. 27. 1940 10 Sheets-Sheet 10 Ihwentors (IA/2L M. FR/DEN fl/VTHONY B. MACHADO Qttorneg haunted July 2, 1946 Qari lid. Friden, Plea ten, and Anthony E. Eelii, assignors to l riden Calculating Machine $0., 2316., a. corporation of Caliicrnla enuary at, zero, Serial No. erases This invention relates to calculating machines and is concerned more particularly with the provision of improved automatic control means therefor.

It is a general object of the invention to provide an improved calculating machine having auto matic controls.

Another object of the invention '3 to provide an improved calculating machine with facilitates conditioning of the machine as a preliminary to a calculating operation, such as division.

Another object of the invention is to provide an improved calculating machine which facilitates tabulatlng of the shiftaole carriage to a desire position.

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

Figure l is a fragmentary plan view showing the right hand portion of a calculating machine embodying our invention.

Figure 2 is a fragmentary longitudinal sectional view, partly in elevation, illustrating certain features of the mechanism, the View being taken in a plane indicated by the line 22 in Figure 1;

Figure 3 is similar to Figure 2 but shows the front end of the keyboard;

Figure 4.- is a plan view of a machine with the carriage and keyboard removed and with certain parts omitted for greater clarity;

Figure 5 is an elevational view of the right side frame plate and the control means mounted thereon, the view being partly in section as indicated by the line 5 in Figure 1;

Figure 6 is a sectional elevation of the clutch mechanism;

Figure '7 is a fragmentary sectional elevational view taken in a plane indicated by the line ';--'i in Figure 4;

Figure 8 is a rear elevational view of the machine partly in section, the view being indicated by the line 3-8 in Figure 2;

Figure 9 is a detail perspective view of one of the control members;

Figure 10 is a detail perspective view of another of the control members;

Figure 11 is a side elevational view of the ma.- chine as indicated by the line ll-ll in Figure l, with certain parts omitted and others broken away to clarify the view; I

Figure 12 is a detail view of certain of the keyboard control mechanism, including the keyboard clear key;

Figure 13 is a sectional elevation of the right 2 side frame plate and the parts associated therewith as viewed from the left side, the view being indicated by the line |3i3 in Figure l;

Figure la is a transverse elevational view partly in section, as indicated by the line l ll i in Figure l;

Figure i5 is a schematic elevational view of a part of the dividend key control mechanism with the parts in inactive position;

Figure 16 is a view similar to Figure 15 but shows the condition of the parts at the beginning of an operation with the dividend lrey depressed, but before the operation commences;

Figure l? is a view similar to Figures 15 and i but showing the parts as conditioned during the carriage return operation;

Figure 18 is a view similar to Figures 15 to 17 but showing the parts positioned during the clear or reset cycle at the end of the carriage-return.

Figure is an operation view showing the conditiori of the parts during a tabulating hift operation; and

2c is an operation view showing the parts as conditioned for entry of the dividend at the end of the tabulating operation.

invention is disclosed as embodied in a calculating machine having actuating mechanism of the uni-directional, continuous drive cycle type wherein all power driven operations are effected by engagement and disengagement of a single clutch providing the only path of power flow from the motor of the machine to the motor-driven part-s thereof. A calculating machine of this construction is disclosed in the copending application 2 of Carl Friden, Serial No. 42,268, filed Septemof the machine in either direction to various crdi- 312.} positions a controlled by means described hereinafter.

Carriage 22 (Fig. 2) includes a frame 3! in which numeral wheel shafts 32 are journaled to carry numeral wheel 33 of conventional construction. Numeral wheels 33 have projecting twirler knobstw for manual setting thereof. To

transmit increment of value to numeral wheels 33, each shaft 32 extends below the frame 3| by means later described.

Accumulator resetting means Means areprovided on the carriage for re-setting the numeral wheels 33 (Fig. 2) to zero registration including means such as a rack bar 4| mounted for endwise sliding movement in the carriage frame adjacent the upper end of the numeral wheel shafts 32 for cooperation with mutilated gears 42 carried by numeral wheel shafts 32. Adjacent gears 42 are actually offset to cooperate with the adjacent vertically offset racks formed on rack bar 4| in the usual manner. When rack bar 4| is moved from its normal position to which it is spiing urged in the usual manner, it will engage the gear 42 of a numeral wheel 33 displaced from the zero position and reset the numeral wheel to such position. Rack 4| carries a handle 44 (Figs. 1 and 8) for manual operation and may be connected to an actuating bar 43 for power operation. Bar 43 is suitably mounted for sliding movement on the frame 3| and may be selectively coupled with rack bar 4| by means of interponent arm 46 (Fig. 1) engageable with a pin 41 carried by slide 43 by turning handle 44. This mechanism is disclosed and claimed in the copending application of Carl M. Friden, Serial Number 240,269, filed November 14, 1938 .(Patent N0. 229L083 issued Aug. 25, 1942) Drive, selecting and actuating mechanisms The values to be introduced into numeral wheels 33 are selected by means of a plurality of banks or orders of settable value keys 6| (Figs. 1 to 3) of conventional construction. Keys BI are mounted'for endwise sliding movement and are adapted to be latched in depressed position by a latching bar 02 associated with each bank of keys SI and adapted to-be operated to release a depressed key by aerokey 83 in each order. All of the orders of keys can be released simultaneously by the operation of a key releasing gate 64 extending along the front edge thereof. Gate 64 is operable through link 63 (Fig. 12) and bellcrank 46 by means of keyboard release key 61 in the usual manner.

The keys 8| (Figs. 2 and 3) cooperate with selecting mechanism including spring urged selecting slides mounted for endwise movement to position gears 63 selectively with respect to the stepped teeth of the associated actuating cylinder l0. Cylinders 10 for adjacent orders are mounted on actuating shafts ll (Figs. 2 and 4) having suitable bevel gear connections with a transverse drive shaft 12 which is suitably journaled in Side plates I! and I3.

Shaft 12 and shaft II are driven cyclically from motor 13 through clutch I4 (Figs. 4 and 6) which may be driven by suitable gearing I from the motor shaft I6. Clutch 14 may be engaged or disengaged by oscillation of spring urged clutch pawl or dog I'l mounted for rotation with shaft I2 and with respect to ratchet l3 Journaled on shaft I2 and driven by gearing". Clutch control lever I9 is pivoted on side plate I3 to determine engagement or disengagement of the clutch by releasing or engaging the nose of dog 11 in the full cycle position thereon.

The number of increments transmitted to a gear 40 (Fig. 2) by a cylinder during cyclic operation of the clutch is transmitted to a square shaft II which carries each ordinal pair ofgears 69 and extends rearwardly of the machine in the usual manner. Each shaft 8| carries a spool 02 having bevel gears 83 and 84 for cooperation with the aligned numeral wheel gear 34.

The engagement of gears 83 and 34 with gears 34 is controlled by strap 06 positioned between the gears and mounted by suitable arms 85 for rocking movement with shaft 81. Thus, rocking of shaft 01 determines transmission of said increments to the numeral wheels and also the direction of entering thereon. Any suitable control means such as plus key 08 (Fig. 1) and minus key 83 may be provided for rocking the shaft I! to cause positive and negative registration. Shaft 07 may be centralized by a pair of spring urged centralizin arms 9| (Fig. 2) cooperating with a central stop 92 and engaging a pin 93 carried by one of arms 85.

Revolutions counter mechanism The revolutions counter may comprise numeral wheels 5| (Fig. 2) on shafts 02 which may be re-set to zero by rack bar 53 similar to the rack bar 4| described above. Rack bar 53 carries handle 48 (Fig. 1) for manual operation and may be connected to extension 49 of actuating bar 43 by interponent 46a cooperating with pin 41a.

The numeral wheels 3| (Fig. 2) are actuated by means of a conventional actuator 54 mounted on a shaft 35 which is rocked from drive shaft 12 through a spring connection in a clockwise direction from the position shown in Figure 2 into operative engagement with the aligned numeral wheel 5|, and then is translated axially to effect entry of the digit. When no count is to be made, the clockwise rocking movement may be restrained by-means of a neutralizing finger 35 (Fig. 13) carried by a slide 51 guided on cross bracket I1 and pivotally connected to plus-minus gate or strap 08 to be controlled thereby. In the central neutral position of strap finger 56 underlies arm 58 of the counter actuator and thereby blocks rocking movement thereof.

Carriage shift mechanism The carriage can be shifted selectively in either direction by power driven means controlled by manually operable keys, and this mechanism is of conventional construction. Carrage 22 is provided with toothed shift rack IOI (Figs. 2, 4 ahd 8) along the rear side thereof for cooperation with shift pins I02 on shift gears I03. Shift gear I03 can be rotated in either direction and receives one-half rotation for each rotation of the clutch referred to above. gear I03 is connected by suitable gearing I04 to respective gear sleeves I08, I01, the gearing being arranged so that the drive from gear sleeve I06 rotates gear I03 in one direction, and the drive from gear sleeve I01 rotates gear I03 inthe other direction. The respective gear sleeves I05, I01 (Fig. 4) are slotted for engagement by toothed collars I08, I09 mounted siidably but non-rotatably on the rearward ends of a pair of adjacent actuating shafts 1|.

The sliding movement of collars I08, I09 (Figs. 4 and 8) is controlled through forks IIO by means of springurged rods III, II: which extend forwardly of the machine and abut similar depending arms H3, I carried by shaft H6 and sleeve III mounted thereon. Adjacent side plate I3 (Figs. 4 and 7) shaft III and sleeve ill have up standing arms H8 and H9 operated by suitable rollers on shift keys |2| and I 22 so that selec- For this purpose the shift' tive depression of the keys controls the direction of carriage shifting.

To enable the power drive shift keys HI and H2 (Fig, have respective pins i23 cooperating with lever in operatively connected by lever I26 to control contacts N1 of the motor drive, and

connected by link i28 (Figs. 5 and 6) with clutch control lever it. Thus, on depression of either of keys i2! or i222, the clutch is engaged and the motor circuit enabled.

From the foregoing it is seen that the carriage can beshiited selectively in either direction.

Tabulation and dividend entry The tabulating and dividend entering mechanism of the instant invention operates to zeroize the registers as a preliminary to a division operation, and to eifect entry of the dividend into themachine automatically operates to perform the above described functions, the desired ordinal position of the carriage upon entry of the dividend having been pre-set in accordance with the number of quotient figures desired, or the desired position of the decimal point in the quotient.

in the embodiment of the invention. selected for illustration, the first operation which occurs upon depression of the dividend key is a shifting of the carriage to its leftmost position if displaced therefrom for a power clearance operation.

Dividend ken-Referring to Figures 1 and 5, dividend key Mil is mounted for endwise sliding movement on side plate it by means of pin Hi2 engaging a slot therein. Spring E43 urges key Hi to the raised position shown in Figure 5. The lower end of key ifil is provided with elongated slot Md which is engaged by pin Hi6 carried at the end of lever l l'l mounted on transverse shaft idil (Figs. 4 and 5).

Intermediate its ends, key Mi (Fig. 5) is provided with latching face i5ifor engagement by the latching end-of a latch slide I52 mounted for endwise sliding movement on side plate it with its rear end pivotally supported on upstanding pivotally mounted arm ciated with arm lit to urge slide I52 to latching position. Thus, upon depression of key i4! it is latched in depressed position, and it remains there until the end of the operation when unlatching occurs by means described later.

Depression of key Hi serves to enable a shift of the carriage to the left, 'to enable a power clearance mechanism, to condition the shift to the right, to block out the counter actuator, and to enable the drive.

The shift of the carriage to the left and the power clearance mechanism for the registers is enabled upon depression of key l4! (Figs. 4 and Spring I54 is asso-' 6 pending arm 3 (Figs. 4 and 7) which abuts the end of shift control rod III for the shift drive connection to the left. Thus, upon depression of the dividend key the shift drive connection determining shifting to the left will be engaged by the above described linkage.

To enable the power driven re-setting mechanism, pusher link it! (Figs. 2 and 4) is provided with oiiset notched end it! in operative pushing engagement with the end of control rod I83 for the power clearance drive. This engagement is maintained by the tension of spring 884 connected between pusher link Hi1 and arm iii. As seen in Figure 4, rod 963 extends rearwardly and carries control fork B66 for shiftable drive establishing collar it? having a slidable but nonrotatable driving engagement with one of the actuating shafts ii, and being toothed for engagementwith the slotted hub ii! of cam N9.

5) when the key operates through arm M1 to rock the shaft H88 in a clockwise direction as viewed in Figures 2 and 5. Referring to Figure As seen in Figure 8, cam 46! is operatively related with arm ill to drive actuating slide M2 for power re-setting. which in the leftmost position of the carriage is operatively related to arm H3 carried by actuating bar 13. The above described mechanism forms part of a conventional power return clearance mechanism as described in said application of Carl M. Friden, Serial No. 240,269 (Patent No. 2.2%,083)

From the foregoing it will be seen that upon clockwise oscillation of shaft 58, as viewed in Figure 2, caused by depression or the dividend key, pusher link lh'i operates to push'rod 363 rearwardly against the tension of spring lid, and to thereby engage the drive connection between collar it? and hub ltd, so that power re-setting will occur when the carriage is in its leftmost position. As described later, this control is disabled at the end of the re-setting operation.

As previously stated, depression of the dividend key Mi also serves to block out the counter actuator and prevent operation thereof, and to condition the shift mechanism tor shifting to the right at the end of the return-clear operation.

As seen in Figures 5, l3, and 15, the lower end of dividend key Mi is engaged in its uppermost position with a roller ldi carried by lever tilt, pivoted at on side plate i3. Lever M2 carries a roller ltd operatively disposed beneath the forwardly extending arm it} of a bellcrank iiit pivoted on shaft ltl, which is suitably mounted onside plate 03. The movement of. bellcrank lBGis utilized to block the counter actuator from operation and also to condition the shift mechanism for shifting the carriage to the right at the end of the return-clear operation.

In order to block out the operation of the counter actuator by movement of the bellcrank A86 (Figs. 13 and 15) the upright arm E88 of the bellcrank 136 carries a pin I89 operativcly engaged with lever ltd, pivoted at 59! on side plate ii. The upper end of lever S90 is pivotally connected at 392 with blocking slide I93 having projection i9 3 lying normally out of the path of oscillation of arm 58 of the counter actuator assembly. Clockwise rocking movement of bellcrank iBS operates through lever ltd to move the slide in and projection wt thereof from the position shown in Figure 15 to that shown in Figure 16, where movecarries a pin i59 cooperatively related with depending arm "5| secured on transverse shaft H6. Shaft H6, as previously described, carries a dement of the counter actuator to active position is prevented as previously explained in connection with the neutralizer slide 51.

In order to condition the shifting mechanism for tabulation to the right, arm H96 (Figs. 8, 9 and 15) is formed integrally with bellcrank I and is pivotaily connected at I 91 to a link "I l and enables the motor circuit.

extending rearwardly and riding on roller I99 on an arm 20I (Figs. 8, 10 and 18) also pivoted on shaft I91. Arm 20I has an arm 203 pivoted thereon and is connected thereto by spring 202 so that arm 203 is biased to move with arm 20I. Shift engaging arm 203 has a curved upper end 204 operatively engaged with shift controlling fork N of the right hand shifting mechanism. Link I90 is adapted to be disposed between the roller I99 and a lever 206 (Figs. 8 and 15) pivoted at 201 on bracket ,I6. Upright end 208 of lever 206 has slotted engagement with a stud 209 on bracket I3 and is spring urged upwardly to spring 2I I.

In order to establish a driivng relation between the lever 206 and arm 20I, link I90 is provided with a raised portion 2I2 which normally is disposed out of the path of the lever 206, as shown in Figure 15, but is moved into the position shown in Figure 16 upon depression of the dividend key, so that when the lever 206 is subsequently depressed, as later described, arm 20I is rocked to operate through spring 202 (Fig. 17)

to place a bias on arm 203 to engage the shift clutch for determining shifting or tabulation to the right as later described.

The dividend key I4l also engages the clutch It will be recalled that shaft I43 (Fig. 13) is rocked in a counterclockwise direction upon depression of the dividend key, and during such movement a depending arm 2I6 serves through its pin 2Il to rock an arm 2I8 pivoted at US on side plate I3, and 'having an upstanding finger 22I operatively related with roller 222, carried at the lower end of lever I26 (Figs. 5 and 13). Upon counterclockwise movement of arm 2I0 (as viewed in Fig. 13), lever I26 (Fig. 5) will be rocked in a. counterclockwise direction to close contacts I 21, and to operate through lever I24 and link I28 (Figs. 5 and 6) to move clutch control lever 19 from the position shown in Figure 6 to its clutch engaging position out of engagement with the clutch dog 11.

Thus, upon depression of the dividend key I, the first operation which ensues is a shifting of the carriage to its leftmost position if displaced therefrom, where a clearing or resetting operation is performed on either or both of the accumulator and counter. The clearing of the registers occurs during a cycle of operation with the carriage in its leftmost position, as shown in Figure 8, where one of shift pins I02 is engaged in the endmost tooth space of shift rack IOI, which is formed in part by pawl 226, pivoted at 221 on the rack and urged against pin 220 by spring 229. With the carriage in the position shown, shift pin I02 during the clearing cycle, rotating in a clockwise direction serves to oscillate pawl 226 so that its extension 230 strikes end 200 of lever 206, and moves it downwardly, and

1 this movement is utilized to initiate shifting of the carriage to the right to the selected position for entering the dividend.

At the beginning of the clear cycle, the parts are positioned as shown in Figure 1'7, where interponent arm I90 has its projection 2I2 disposed between the end 203 of lever 206 and roller I99 on shift conditioning arm 20I. Thus, when pawl 220 moves downwardly, lever end 200 is depressed from the position shown in Figure 1'7 to that shown in Figure 18, when lever 20I operates through spring 202 to place tension on shift engaging arm 202. The movement of shift engag- In our 203 from the position shown in full lines 8 in Figure 18 to that shown in dotted lines is delayed until the end of the cycle by interlock means associated with the shift engaging mechamsm. I

Referring to Figures 4 and 8, the interlock means comprises lever 23!, pivoted at 232 on rear frame bracket I6, and having a pair of upstanding pins 233 spaced from and disposed in the path of respective shift forks IIO carried by rods III and H2. As seen in Figure 4, when one shift fork is moved rearwardly to engage the corresponding shift drive connection, the opposite pin 233 moves into blocking engagement with the other shift fork IIO to prevent operative movement thereof until the other shift drive is disengaged. Inasmuch as the shift drive for determining shifting to the left remains engaged until rocking of pawl 226 during the clear cycle, initiation of the shift to the right by movement of shift rod II2 by the hooked end 204 of arm 203 cannot occur until the end of the re-setting cycle. I

During the resetting cycle, certain other conditionings are effected in the machine. As seen in Figures 8, 10 and 17, arm 20I has integrally formed therewith a bellcrank 236 and both arm 2M and bellcrank'236 are urged to the position shown in Figure 17 by spring 231 attached to arm 20I and to the frame. The movement of the bellcrank 236 with arm 20| from the position shown in Figure 17 to that shown in Figure 18 is utilized to condition the control for entering the dividend at the end of the shifting operation to the right, and for maintaining the shift engaged until the selected tabulated position is reached.

To latch the bellcrank 236 and arm MI in the position shown in Figure 18, the lower horizontal arm of bellcrank 236 is provided with laterally extending ear 238 adapted for engagement with a seat in a latch lever 239, pivoted at 24I on side plate I3, and urged in a clockwise direction by spring 242. As shown in Figure 18, upon clockwise movement of arm 20I and bellcrank 226, they are latched in position by latch lever 239.

The movement of bellcrank 230 also serves to condition means for engaging the plus-minus gears to enter the dividend at the end of the shift operation. For this purpose the upper arm of bellcrank 236 is pivotally connected to a link 246, which is pivotally connected at 24! with a depending arm 248 pivoted to an actuating slide 249 mounted for vertical sliding movement on side plate I3, by slotted engagement with respec tive pins 25L As shown in Figure 17, depending arm 240 is normally to one side of an car 262 of a latching bellcrank 253 which serves to determine engagement of the plus-minus gears for entry of the dividend. As shown in Figures 18 and 19, arm 248 is operatively related to ear 252 so that downward movement of slide 249 will release latch lever 253 as later described.

The movement of lever 206 and end 203 thereof during the re-setting operation also determines release of the shift connection determining shifting to the left. For this purpose bellcrank 23I (Fig. 13) is pivoted on shaft 01 and has one arm disposed beneath end 208 of lever 206. The depending arm of bellcrank 26I is pivotally connected-to link 202, having its forward end pivotally connected to depending arm 233 secured on transverse shaft 264 (Figs. 4 and 13). Shaft 204 (Figs. 2 and 4) carries an arm 266 which is slotted at its offset end to receive pusher link I91. Thus. counter-clockwise movement of the bellcrank 26I,

as viewed in Figure 13, moves link 2B2 forwardly to rock shaft 264 in a counter-clockwise direction (in a clockwise direction as viewed in Figure 2) so that arm 261 lifts pusher link i51 against the urgency of spring we to move end 152 thereof out of engagement with push rod 133 for the clear mechanism, and to disengage pin 159 from arm till of the control means for determining shifting to the left.' In this manner, both the shift connection for left hand shifting and the drive connection for resetting are disabled during the cycle performing the resetting operation so that they can be disengaged near the end of such cycle.

Tabulation control it will be recalled that when the right hand shift mechanism is acting as shown in Figure 18 by. the dotted line position of shift control fork lit, the control linkage therefor is latched in omrative position by the engagement of latch 239 with bellcl'ank 296, and also that arm 238 carried by actuating slide 2&9 is in operative position to release bellcrank 252. A tabulation control is provided for eiiecting this release selectively in any shifted position of the carriage, so that the dividend will be entered in such position. Alternatively, as later deescribed, the carriage may be tabulated to the selected position, without entry of the dividend.

As seen in Figures 1, 2 and 14, the carriage 22 is provided with a series of tabulator keys 21i, numbered ii and 2 to in accordance with the position of the carriage. In the first or leftmost position of the carriage zero tabulator key 212 is aligned with arrow 213 on the casing of the machine. Tabulator keys 211, 212 (Figs. 2 and 14) are mounted for vertical endwise movement in broached slots in carriage framebar 210, and keys 211 can be latched in depressed position by spring urged latching slide 216, which is adapted to engage'over the tooth 211 of a. depressed key. Zero key 212 provides a release key for any depressed key 211 which it may be desired to release in changing the setting of the machine to cause positioning of the carriage in its rightmost position. In alignment with the 10 key 211 (Fig. 14) a beveled fixed cam 2311 is provided which operates arm 232 irrespective of the depression of 10 key 211. Thus, "10" key 211 is a lid This operation will occur toward the end of the last shift cycle.

The downward movement of actuating slide 249 as the carriage enters its selected positionalso serves to release spring actuated means for meshing the plus-minus gears, and for releasing the dividend key. The downward movement of slide 2&9 (Figure 19) acts through interponent arm 299 to rock latching bellcrank 252 in a counterclockwise direction and thereby move its latching notch 255i out of the path of ofiset ear 292 of a bellcrank 293, pivoted on pin 294 extending between side plate l3 and bracket 295 on plate 39% (Figs. 8 and 11). Bellcrank 294 is urged in a counter-clockwise direction by a relatively strong spring 2955 (Figs. 11, 19 and 20), and has its upper end formed as a cam nose 291 for operative engagement with a roller 2%, carried at the lower end of a lever 299, secured on haft Ell. As seen in Figure 19, the cam nose 291 of bellcrank 293 is spaced from roller 298 in the neutral positions thereof to permit normal movement of shaft or and lever 299 therewith during registration of a negative character. Upon release of bellcrank 293, cam nose 291 becomes eiliective as shown in Figure 20 to rock lever 29% and shaft 81 in a clockwise direction, and thereby mesh gears 83 with the numeral wheel gears as (Fig. 2) to determine a positive registration therein during the dividend entering cycle, when the amount set up in the keyboard will be entered as the dividend in the selected tabulated position of the carriage.

Movement of lever 299 also serves to actuate latch slide 152 (Fig. 5) and thereby release the dividend key. It will be recalled that the dividend key serves to hold counter blocking slide in active position, and means is brought into play to prevent movement 01' counter blocking slide 192 out of active position when the key is released. For this purpose the oflfset ear 292 (Fig.

I 20). of bellcrank 293 moves downwardly in front dummy key provided merely for the operators convenience. Latching slide 216 is maintained in position in the frame bar 210 by retaining bracket 218. Keys 211 and 212 are urged to their raised positions by respective spring 219 associated therewith.

A depressed key 211, as indicated in dotted lines in Figure 14, is adapted to engage a V- shaped laterally extending car 231 of an arm 292, pivoted at 283 on frame bracket 19. As shown in Figure 14, in the leftmost position of the carriage, release key 212 is aligned with the extension 281, and correspondingly if the carriage is displaced one or more ordinal spaces from its leftmost position, the corresponding key 211 will engage the nose 281 and depress the arm 282. Adjacent its end, arm 2,32 (Figs. 14 and 18) carries roller 28 1 which is disposed above the upper end of actuating slide 229. Thus, when the carriage shifts into a predetermined position, the actuating slide 249 is'operated to move latch 239 from the position shown in Fig, 19 to that shown in Fi 20, to release bellcrank 236 and-arm 201 and thereby permit disengagement of the shift mechanism for shifting the carriage to the right.

of ofiset car 301 on lever 190, and maintains slide 193 in the position shown in Figure 20 during enterin of the dividend.

The movement of bellcrank 293 which initiates the dividend entering operation also enables means for restoring such bellcrank to inoperative position. As shown in Figure 11, the lower end of bellcrank 293 is connected by link 3116 with an arm 301 pivoted on plate 300 and having its upper end normally disposed out of the path of a roller 308, carried by a. disc 309 on the end of transverse shaft 12. However, counterclockwise movement of bellcrank 293 serves through link 306 to move arm 301 into the path of roller 303, so that near the end of the dividend entering cycle of operation after entry of the dividend into the accumulator. roller 308 rocks am 301, and through link 3116 oscillates bellcrank 293 in a clockwise direction so that latch 252 can again move to active position as shown in Figure 19. The return of bellcrank 293 also moves tooth 292 thereof out of engagement with tooth 301 so that lever and link 193 can return to inactive position, as shown in Figure 15. Lever 190 and link 193 are returned to their Figure 15 position by gravity action. If desired, a suitable spring may be employed to aid in such return. ,7

Tabulation without dividend enterin If desired, a control may be set whereby the carriage may be tabulated to a. selected position 11 without entering or the dividend, for example,

if the amount set in the keyboard is to be used as a constant divisor and the dividend is set in the accumulator by means of twirlers 3I0. As

seen in Figure.8, lever 299 is not directly secured to shaft 81, but is provided with a hub 32I having a clutch connection-with a second clutch element 322 secured on shaf 81. Clutch elements 32l and 322 are normally urged apart by spring 323, but are held in engaged position by the lever 324, pivoted at 326 to bracket 235. The lower end of lever 324 is held in the position shown by roller 321 on double arm lever 328 (Figs. 8 and 11) pivoted on side plate l3, and having depending arm 329 pivotally connected to forwardly extending link 33I Figures 3 and 12%.

As seen in Figure 13, link Bill is pivoted to downwardly extending arm of th sl supported on cross brace 33 i, 1. d piv to depending arm till, pivoted at plate I3. Slide 333 controlled by keylo lever 341, pivoted at 342 on side plate board lever I is shown in its unloackz'an position in Figure 13, but as moved therefrom operates through slide 333, arm 332 thereof. link 33i. and double lever 329 to move roller 321 (Fig. ill upwardly and allow lever 324 to move outwardly and disengage clutch hub 32I on the corresponding clutch member 322 under the influence of spring 333 so that oscillation of lever 239 no longer oscillates shaft 81. At the same time, however. arm 289 remains in engagement with the cam nose 2910f bellcrank 283 to insure release of the dividend key. Arm 299 (Figure 11) being secured on shaft 81 plus-minus gears is returned to it inactiv position at the end of the operation by the centralizer members .II for the plus-minus gears as shown in Figure 2.

If desired, the amount keys may be released at the end of the dividend entering cycle. Keyreleasing gate 84 (Fig. 12) has its end engaged by notched end 35I of lever 65 pivoted at 352 on bellcrank 86 and spring urged to the position shown. The forward end 01 lever 85 is engaged by pin 353v on lever 354 pivoted at 358 to arm 351 and at 358 to arm 358. Arm351 is also pivotally connected to link "I which extends rearwardly and laterally through an opening in side plate I8 (Fig. 13) for pivotal connection to lever I41. Thus, when key "I is depressed the linkage described operates to depress the forward end "I (Fig. 12) or lever 85 and disengage it from bail 44. Thus. the keyboard will not be released until key I is unlatched. This control is operative only when "add" key 388 Is depressed to engage link 381 with pin 338 on bellcranl: l3. link 381 being operated in the usual manner from arm 358 and pin 310a (Figure 13) on drum 310.

ODeratin.The operation of the dividend entering and tabulating mechanism will be reviewed briefly. The machine is conditioned by setting the amount keys H to the dividend value to be entered in the accumulator, and by determining the point of entry of the amount set therein by depressing the selected tabulating control key 2". Thereafter the dividend tabu'lating key I (Figs. 1, 5, and 15) is depressed.

As previously stated the depression of key I serves to enable the shift mechanism for a lefthand carriage shifting, to enable the power clearance mechanism, to condition the right hand shift controlling the action of the 12 mechanism, to block out the counter actuator, and to enable the drive mechanism.

Upon depression of the key I4 I, the key operates through arm I41 and shaft I48 (Figs. 2 and 5) to move pusher link I51 rearwardly and thereby move control rod I33 for the power clearance mechanism rearwardly to enable the drive connection for the resetting mechanism. Pusher link I51 also carries pin I59 which works through arms iii and shaft II6, having arm II4 operatively related to shift control rod III for the left hand shift drive connection thereby enabling this connection.

To block out the counter actuator, key I4I (Figs. 15 and 16) operates through lever I82 to rock belleranlr. I05, having pin E89 operatively related to lever I90. Lever i3!) is connected to blocking e 693 and moves it underneath the offset ear oi the counter actuator and thereby blocks movement or the actuator to active position. At the same time, arm tilt is rocked to move iuterponen't arm M8 between roller 533 and end 208 of lever 200 to enable the right hand shift inecha nisrn, whose initiation however is delayed until the end or the left-hand shifting and clearing cycles.

To engage the clutch and enable the circuit for the motor, shaft I48 which is rocked upon depression of key I M operates through arm 2 I 5 (Fig. 13) and arm 2I8 to rock lever I25 to close the contact I21 and to operate through lever I24 and link I28 to move clutch control lever 19 to clutch engaging position.

When the drive begins, shift gear i02 (Fig. 8) operates to shift the carriage to the right as viewed in Figure 8, that is to its leftmost position as viewed from the front of the machine, and when it reaches this position the resetting actuating slide I12 becomes active with respect to arm I13 to operate resetting actuator slide 43, and thereby reset the accumulator and the revolutions counter to zero. During this cycle, pawl 228 is rocked to depress end 208 of lever 205 and thereby determine shifting to the right to the tabulated position.

Thus, end 208 of lever 205 is moved from the position shown in Figure 17 to that shown in Figure 18 during the resetting cycle to condition the right hand shift mechanism by depressing arm 20I and tensioning spring 202 to place a bias on shift engaging arm 203. At the end of the resetting cycle, spring 202 becomes eiiective to move arm 204 and shift fork I I0 from the full line position in Figure 18 to the dotted line position and thereby to engage the right hand shift mechanism.

The parts are latched in the position shown in Figure 18 by the engagement of latch 239 with car 238 of bellcrank 236 formed integrally with arm "I. This movement also serves to. position interponent arm 248 over ear 252 of lever 253 to condition the dividend entering mechanism.

To release the left hand shift and resetting drive connections lever 206 operates through bellcrank 28I, link 282, arm 263 and shaft 284 (Figs. 4 and 13) and arm 268 thereon (Fig. 2) to lift pusher link I51. This enables withdrawal of the resetting and shift control rods controlled by the pusher link I 51.

The right hand shifting operation, therefore, follows the shifting to the leftmost end position and the clearing cycle in that position. The right hand shift continues until the position determined by the depressed tabulation control key II. When the carriage enters the position del termlned by the depressed key 211, such key strikes cam nose 28E of arm 232 to depress the same and thereby move actuating slide 249 from the position shown in Figure 19 to that shown in Figure 2c.

Movement of actuating slide 2 39 moves latch arm 239 to inactive position to allow the right hand shift mechanism to be disengaged and also through interponent arm 2 38 releases latch 252 for the dividend entering control bellcrank 291K. Bellcrank 293i moves under the influence of its spring 2% to rock arm 29% and shaft 8? to mesh the plus gears with the numeral wheel gears and thereby determine entry of the value set in the keyboard. At the same time offset ear 2% on bellcrank 293 moves in front of ear 3858 on arm 6% to maintain blocking slide its in active blocking position with respect to the counter actuator. Rocking of lever 29% also moves latch slide G52 for the dividend key to determine release thereof at the beginning of the dividend entering cycle so that at the end of this cycle the machine will stop.

From the foregoing description it is seen that upon depression of the dividend key the first operation is to shift the carriage to its leftmost position for a resetting or clearing operation and then to shift the carriage back to the right to the selected position for entering the amount set in the keyboard.

. ing of said accumulator in an end position and If desired, the keyboard can be cleared at the end of the dividend entering cycle by depressing the Add key 365 (Fig. 13) so that link 36? will reciprocate once each cycle, but cannot become effective untilthe' last cycle when therelease of key I allows lever [iii to move back to the position shown in Figure 12 to rock key releasing bail it after the dividend entering cycle.

If it is desired merely to clear the register and to set the carriage in a predetermined position, as for example in using a constant divisor, this may be effected by setting keyboard lock lever I to its locking position. In this way the di- ViSOr value is locked in the keyboard, and the clutch connection 32!, 322 (Fig. 8), is disengaged so that the rocking of lever 299 does not move the plus gears to active position. The dividend value is set in the accumulator by twirlers' m on the numeral wheels thereof.

We claim:

1. In a calculating machine having an accumulator, actuating means therefor, selecting mechanism, numeral keys for setting said selecting mechanism, a revolutions counter, a counter actuator, means for shifting said accumulator, and resetting means for said accumulator; an operation key, means controlled by said key for efiecting a combined operation of said shifting and resetting means to first position said accumulator in an end position and to then cause resetting thereof, means brought into play by said shifting and resetting effecting means for thereafter causing entry of a dividend value into said accumulator, and means controlled by said key preventing entry of a count in the counter during the dividend entering operation.

2. In a calculating machine having an ordinally shiftable accumulator, actuating means for said accumulator, means for selectively shifting said accumulator in either direction, a revolu tions counter, a counter actuator; and resetting means for said accumulator and said counter; a manually operable key, means controlled by said key for effecting a combined operation of said shifting and resetting means to cause positionto cause resetting of said accumulator, means controlled by said key and brought into play at the end of the resetting operation for tabulating said accumulator by operation of said shifting means from said end position to any selected one of a plurality of ordinal positions, means controlled by said key and brought into operation with said accumulator in said selected ordinal position for entering a, dividend value in said accumulator, and means also controlled by said key for preventing entry of a count in the counter during said dividend entering operation.

3. In -a calculating machine having an ordinally shiftable accumulator, actuating means for said accumulator, means for selectively shifting said accumulator in either direction, a revolutions counter, a counter actuator yieldably urged to active position, and resetting means for said accumulator and said counter; a manually operable key, means controlled by said key for eiiecting a combined operation of said shifting and resetting means to cause positioning of said accumulator in an end position and to cause re-- setting of said accumulator, means controlled by said key and brought into play at the end of the resetting operation for tabulating said accumulator by'operation of said shifting means from said end position to any selected one of a pin rality of ordinal positions, means controlled by said key and brought into operation with said accumulator in said selected ordinal position for entering a dividend value in said accumulator, and a blocking element positioned by said key to cause yielding of said actuator and thereby suppress entry of a count in the counter during said dividend entering operation.

4. In a calculating machine having an ordinally shiftable accumulator, actuating means for said accumulator, resetting means for said accumulator, and means for selectively shifting said accumulator in either direction; a manually operable dividend entry key, means controlled by said key for causing operation of said shifting means to position said accumulator in an end position thereof, means enabled by said key and operative with said accumulator in said end position for causing operation of said resetting means, means conditioned by said key and brought into play at the end of the resetting operation for causing shifting of said accumulator in the opposite direction to any one of a plurality of selected ordinal positions for dividend entry, and means controlled by said accumulatorupon shifting thereof to said selected ordinal position for rendering said actuating means effective to cause entry of a value in said accumulator,

5. In a calculating machine having an ordinally shiftable accumulator, actuating means for said accumulator, resetting means for said accumulator, and means for selectively shifting said accumulator in either direction; a manually 0perable dividend entry key, means controlled by said key for enabling shifting of said accumulator in one direction to an end position thereof, means enabled by said key and operative with said accumulator in said end position for causing operation of said resetting means, means condi= tioned by said key and brought into play at the end of the resetting operation for causing shifting of said accumulator in the opposite direction to any one of a plurality of selected ordinal positions for dividend-entry, power-operated normally restrained means for rendering said actuating means effective, and means controlled by said accumulator upon shitting thereof to said selected ordinal position for releasing said normally restrained means.

6. In a calculating machine having an ordi-' 'nally shiitable accumulator, actuating means therefor, and selecting means including keys; a dividend entry control key, means controlled by said key for eil'ecting resetting of said accumulator and for causing shifting of said accumulator to a selected ordinal position, means controlled by said key and brought into play with said accumulator in said selected position for eiiecting operation of said actuating means to enter a value in said accumulator, means for locking depressed keys in depressed position, and means controlled by said locking means for disabling said operation eiiectlng mean whereby with said locking means active said accumulator is reset and shifted to the desired selected position with out entry 0! a value therein.

7. In a calculating machine having an accumulator, actuating means therefor, selecting mechanism, numeral keys for setting said select ing mechanism, means for shifting said accumulator, and resetting means for said accumulator; and operation key, means controlled by said key for eflecting a combined operation of said shifting and resetting means to first position said accumulator in an end position and then cause resetting thereof, means brought into play by said shifting and resetting efiecting means for thereafter causing entry of a dividend value into said accumulator, and means including a manually settable member for rendering said dividend entry causing means inefiective.

8. In a calculating machine having an accumulator, actuating means therefor, selecting mechanism, numeral keys for setting said selecting mechanism, means for shifting said accumulator, and resetting mean for said accumulator; an operation key, means controlled by said key for effecting a combined operation of said shifting and resetting means to first position said accumulator in an end position and then cause resetting thereof, means brought into play by said shifting and resetting effecting means for thereafter causing entry of a dividend value into said accumulator, means including a manually settable member for rendering said dividend entry causing means ineiiecti'vc, and locking means or said numeral keys controlled by said settable member.

CARL M. FRIDEN. ANTHONY B. MACHADO.

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