USRE17466E - chase - Google Patents

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Publication number
USRE17466E US RE17466 E USRE17466 E US RE17466E
United States
Prior art keywords
Prior art date
Application number
George C. Chase
Original Assignee
Monroe Calculat
Filing date
Publication date




Ocnzz, 1929.
G. c. CHASE Re, 17,466
MULTIPLIER MECHANISM FOR CALCULATING MACHINES original Filed March 1a, 1926 lsheats'sheet 1 www/mm- Gunmen G. c. CHASE Oct. 22, 1929. Re. 17,466
l5 Sheets-Sheet 3 Original Filed March 15. 1926 @UCA/uhm@ worms G. c. CHASE Oct. 22, 1929.
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15 Smetana-Shea?l 5 Original Filed March 15, 1926 U11/venin Y@ MMM u gli) (MJT/Vaaklh.
abtorne 'G. c. CHASE Oct. 22, 1929. MULTIPLIER MEcHANIsM Fon CALCULATING MACHINES Re 17,466
l5 Sheets-$het 6 Original Filed March 15. 1926 dumm l G. c. cHAsE Oct. 22, 1929. MULTIPLIER nmcHANrsm Fon CALCULATING mamans Re. 17,466
15 Sheets-Sheet 7 Original Filed March 15, 1926 mmm E.
l5 Sheets-Sheet.V 8
Original Filed March 15, 1926 l l r l l I G. C. CHASE Oct. 22, 1929. MULTIPLIER MECHANISM FOR CALGULATING MACHINES Re. 17,466
15 Sheets-Shet 9 i 275 Original Filed March 15, 1926 \273 m 27k f A? 27f- Gnome G. C. CHASE Oct. 22, 1929. MULTIPLxER MECHANISM FOR CALGULATING MACHINES Re. 17,466 l5 Sheets-Sheet l0 Original. Filed March 15. 1926 Jmewfm:
l5 She 'cs-Sheet l1 G. C. CHASE Original Filed March 15, 1926 MULTIP A IS F R CALCULAI'IN MACHINES oct 22, 1929. LIER ECH N M O G Re. 17,466
15 Sheets-She'et 12 Original Fi March 15. 1926 2510. fvwm allume,
0d. 22, 1929. G- C- CHASE Re. 17,466
MULTIPLIER MECHNI'SM FOR CALCULATING MACHINES 15 Sheets-S Original Filed March 15, 1926 heet 13 amen/fnl G. C. CHASE Oct. 22, 1929. Re. 17,466
MULTIPLIER MEcHANIsM Foa CALCULATING MACHINES 15 Sheets-Sheet 14 Original Filed March 15, 1926 Oct, 22, 1929. s. c. cHAsE MULTIPLIER MECHANISMFOR CALCULATING MACHINES 15 Sheets-Shet 15 Original EiledrMarch 15,1926
Original No. 1,685,074, dated September 18, 1928, Serial No. 94,988, led March 15, 1926.
NEW JERSEY, A CORPORATION OF DELA- MULTIPLIECB. MEOHANISM FOR CALCULATING MACHINES Application for reissue led August 7, 1929. Serial No. 384,056.
This invention relates to means for accomplishing multiplication in calculating machines, such, for instance as the reversible cycle calculator disclosed in Patent No. 1,566,650, issued to George C. Chase, on December 22, 1925, entitled Operatin means for calculators, being shown as app ied to a machine constructed in accordance with the reissue patent to Baldwin, No. 13,841, as modified by the Patent No. 1,474,230, issued to E. F. Britten, Jr., November 13, 1928,-and by the above-noted patent to Chase.
An object of the invention is to provide multiplier key mechanism, whereby the depression of a key will determine the number of times that an amount set up on the multiplicand keys will be added upon the numeral wheels; in combination with means for terminating an operation upon an overrun of the tens carrying mechanism.
A further object is to provide a bank of multiplier keys with locking devices, whereby the depression of one key of the bank will lock the other keys until the partial product determined .by the depressed key is registered.
Another object is to provide means whereby the locked keys are automatically released and the depressed key restored to raised position when the registration determined by the depressed key has been completed; or, the registration having been completed, when the operator releases the depressed key.
Another object is the provision of a multiplier key mechanism in which the machine will be stopped at the end of a registration conforming to the numeral value of a depressed key even if the operator continues to old the key depressed, and in which the keyT and reversing mechanism.
Fig. 7 is a detail section on the line 7-7 of Fig. 6.
Fig. 8 is a perspective view of the starting mechanism,' with the add key shown depressed.
Fi 9 is a similar view with the subtract key s own depressed. l
Fig. 10 is a section on line 10-10 of Fig. 1, showing the multiplier mechanism.
Fig. 11 is a planular section on line 11-11 of Fig. 10, with the multiplier selecting rack shown in normal position.
Fig. 12 is a similar view, with parts in the position taken upon depression of the 5 key.
Fig. 13 is "asimilar view, with the 5 key depressed and the selecting rack advanced four spaces.=
Fig. 14 is a detail section on line 14--14 of Fig. 10, showing a multiplier key and associated parts in normal position.
Fig. 15 is a similar view, with theimultiplier key shown as depressed. v
16 is a similar view, showing the means whereby a depressed multiplier key must be released before another may be depressed.
Fig. 17 is a detail front view of the multiplier selecting mechanism, showing the locking bail held in active position.
Fig. 1S is a detail :front view of the lockinbail and latch in released osition.
ig. 19 is a left hand` side view of the ma.- chine with the casing broken away, showing the parts in normal position.
Fig. 20 is a detail side view of parts hidden in Fig. 19.
Fig. 21 is a 'detail side view of the stopping mechanism, with parts in position taken upon depression of the add, or partial depression of a multiplier ke Fig. 22 is a similliir view showing the parts in position taken upon release of the key and be ore the restoration of the clutch lever to neutral.
Fi 23 is a similar view, with the parts in position as arrested at the end of an additive movement.
Fig. 24 is a similar view, with the parts shown as returned from the position of Fig. 23 to full cycle position.
Fig. 25 vis a similarview, with the parts shown as returned from the position in Fig. 24 to position with the rebound stopped and the multiplier locking bail released.
Fig. 26 is a perspective view of the starting mechanism, with the parts in position assumed with a multiplier key in full-depressed position.
Registering means. Figs. 1-.9
According to the present disclosure, and as more fully set forth in the Baldwin and Britten patents above referred to, amounts set up on the keyboard 18 and thereby upon the differential actuating ears 5 (Fig. 3) are registered upon numerafwheels 13 by the operation of, differential gear shaft 4 and shaft 15,4 wheieon the tens carrying members are mounted, these shafts being connected a trainof 1-to-1 ratio gearing 74, 75, 80, 81, (Fig. 2).
Multiplier wheels 85 may be provided, as shown in these patents, or in accordance with other well known arrangements, but since this merely provides a checking up means in multiplication, it will not be necessary to descri e the mechanism here. Means are also rovided as in the above mentioned patents or transversely shifting the carriage 2 whereon the numeral wheels 13\and 85 are mounted, whereb, multiplication and division may be per ormed in the well-known manner.
The motor driving means illustrated is substantially the same as that disclosed in the Chase Patent No. 1,566,650, wherein a motor A is in driving connection with a planetary gear mechanism, the gear members 105 and 109 of which normally rotate idly, but may be selectively arrested by means of a reversing clutch lever 111, to drive the third member of the dierential, connected with 'carry shaft 154, forwardly or reversely, respectively.
Reversing clutch lever 111 is thrown from neutral into additive or subtractive clutch position by means of a transverse rock shaft 125 (Fig. 8), the direction in which this shaft is rocked to accomplish a given result being shown as op osite to that shown in the beforementioned hase atent. For this reason the add key 120 and t e subtract key 121 contact directly with the rock arms 124, 124, upon opposite sides of shaft 125, and setting lever 128 is pivoted to the frame eccentrically of shaft 125 and provided with a depending arm having a pin and slot engagement with a second rock arm 126 of shaft 125.
The a'dd key 120, as well as the multiplier key mechanism hereinafter described, will therefore act to rock shaft 125 in a counterclockwise direction, as viewed in Fig. 8, thereby rocking lever 128 in a clockwise direction, causing the wall of slot 129 of lever 128 to contact with pin 130 of lever 111 and engage the clutch tooth of arm 114 of thi..` latter lever with gear 105, to cause additive rotation of the numeral wheel actuators. Depression of the subtract key 121 will rock the parts 124, 125, 126, 128, in the opposite direction. as shown in Fig. 9, causing the clutch tooth of arm 113 of lever 111 to engage the clutch member 110 of gear 109, to cause subtractive rotation of the numeral wheel actuators.
Full cycle stopping means. Figs. 20-25 Crank arm 20, upon shaft 4, has link connection 21 with rock lever 22. Arm 24 is pivoted at 23 and normally held in rearward po' sition by spring 28, with a suitable lug thereof in contact with stop 29, and carries pivotal stop element 25, located in the plane of and normally held outside the path of movement of rock lever 22, against the tension of its spring 26 by the action of spring 28 and engagement o lug 30 of element 25 with the end of a lever 31. If the forward end of lever 31 is raised out of engagement with lug 30, element 25, assisted by its spring, will drop into position to engage the free end 27 of the rock lever 22 as the latter begins its next forward stroke. Arm 24 will now move as a unit with rock lever 22, a forward extension 144 of said arm engaging by means of a pin 145 thereof with a cam wall 147 of reversing clutch lever 111, to bring the latter to neutral or unclutched position.
The numeral wheel actuating means, thus freed from the action of the motor, will be prought to rest in full-cycle position as folows:
Following the action of arm 24 upon lever 111, continued movement of lever 22 and arm 24 will bring the latter into engagement with a fixed stop 29, whereby forward movement of the parts will be arrested beyond their fullcycle position, whether in additive orV subtractive rotation. As soon as the forward end of lever 31 is allowed to drop into the path of movement of lug 30, the rebound of the actuating mechanism and the action of spring 28 will lift element 25 from engagement with lever 22 and leave the machine free for further operation, the actuators being located in full-cycle position by means oa cam 153 upon carry s mit 154, acted upon by lever 155, spring 156 and roller 157 (Fig. 5).
In addition, subtraction and multiplication, lever 31 is controlled as follows:
Setting lever 128 is provided with cam edges 131, 132, either of which may depress a rollerl 133 mounted upon the rear end of position beneath releasing lever 134, fulcrumed at 134 to theA framing. Upon the rear end of the releasing lever is pivotally mounted releasing pawl 136, impelled by spring 138 toward stopping lug 139 of said lever. Upon depression of the add or the subtract key or operation'of the multiplier devices, lug 141 of pawl 136 will be' depressed to a position lower than lug 142 of lever 31, whereupon spring 138 will move said pawl pivotally to bringing 141 to ug 142 (see Fig. 21) Upon release of the key, releasing lever 134 will be moved by its spring to raise pawl 136, whereupon the contact of lu 141 with lug 142 will raise the forward endg of lever 31 and trip sto element 25, to stop the machine at fullcyc e position (see Fig. 22).
Arm 24 of the stop mechanism is provided at its upper end (shown as pivoted coaxially with element 25) with a laterally yieldable spring tooth 149, normally abutting against lug 148 of releasing pawl 136. Upon depression of pawl 136, consequent upon de ression of the add, the subtract or a multip ier key, lug 148 will move downwardly past tooth 149 and spring 138, movingL said pawl, will bring lug 148 beneath toot 149 see Fig. 21). Upon release of the key, paw 136 will rise and its lug 148 will raise tooth 149 against the tension of its spring (see Fig. 22), in which position it will remain until arm 24 is carried forward, against stop 29 in the operation of the stopping means, when tooth 149 will be released and will resume a position in line with lug 148. In the rebound of the parts following contact of arm 24 with stop 29, the lug 30 of stop element 25 will pass below the forward end of lever 31, the latter beineF held in raised position by releasing paw 136. Tooth 149 will now contact with lug. 148 and move the releasing pawl to bring its lug 141 from beneath lug 142, whereupon the releasing pawl will be raised by the releasing lever spring to normal position, and lever 31 will fall and rest upon luc 30. Stop element 25 has thus been 'allowed to remain in contact with rock-lever 22, and link 21 moving through dead center position, the parts will ybe stopped a second time, should the rebound thereof be sullicient (see Fig. 25), following which stop element 25 will be restored to normal restrained positon by Contact of lug 30 thereof with the end of lever 3l, as in Fig. 20.
Division is accomplished upon this machine preferably by the method of re cated subtraction 'and the determination o a quotient figure may be made automatic by means of a special control, as follows:
The divisor set up on the keyboard being subtracted, by holding down subtract key 121, one more than the number of tmes it is contained in the corresponding portion of the dividend registered in wheels 13, a negative numeral wheel Yreading is obtained, the higher order numeral Wheels 13 passing to a registration of nine as far to the left as car ry over mechanism is provided. The carry pin g (Fig. 19) of the numeral wheel which is in positionV to be acted u n by the extreme left-hand carry tooth j (Flig. 3) will lie m such relation to lever 31 as to operate a cam end 32 of said lever as the wheel passes to 9, (Fig. 19) thereby raising theforward end of lever 31 and releasing stop elementA 25, to bring the machine to rest. In the machine illustrated, the stopping of the actuators will not be purely automatic, since if the operator continues to hold down the subtract key, the machine will immediately resuine the operation. The return of the reversing clutch lever 111 to neutral position,
Aresulting from the tripping of element 25,
will, however, through parts 128, and 125, communicate a slight upward movement to subtract key 121, this movement serving as a signal to the operator to remove finger pressure from the key. The wheel 85 which is being operated at the time will now register one more than the true quotient, and a corrective additive operation is performed,-
Multiplier mecha/nz'sm. Figs. 10-17 According to the embodiment of the invention illustrated herein, the following multi lier devices are provided, which cooperate with the mechanism, hereinbefore described, to provide for the automatic determination of product figures.
y A bail 250, pivoted to they framing at 251, 251, carries a slide 252 secured thereon by a pin and slot connection, the slide being held in rearward position by means of a sprin 253. The lower ends of bail 250 are extende past the pivots 251 at 284 below the lower keyboard plate, and contact with a locking bail 254, also depending from pivots 251, 251. An intermediately fulcrumed lever 255 engages a perforation 256 of bail 250, said lever forming in effect a depending extension of said bail. A spring 257 holds bail 250 and lever 255 normally in position with said bail engaging a stop 258 (Fig. 17). Slide 252 is provided with lateral spaced teeth 259, which in the normal position of the slide lie within notches 260 of the stems of the multiplier keys 261 (Fig. 14). The notch 260 of each multiplier key has an upper inclined wall or cam face 262, terminating at the lower edge of a shallow notch 263, the inner or stop wall of which is located in a plane of movement intersecting an intermediate point of said cam face. Upon depression of a multiplier key cam face 262 engaging the tooth 259 o f slide 252, will rock bail 250 to the left until the tooth escapes from said edge, when the bail will assuine an intermediate 'position where it will be held hv engagement of tooth 259 with. the stop wall of notch 263. Further depression of the ke is prevented by engagement of a suitab e stop, and return of the key to raised position by its spring is prevented by engagement of notch 263 with tooth 259 (Fig. 15). The free ends 284 of bail a250 abut against a flange 264 of locking bail 254, so that as bail 250 is rocked toward the left the bail 254 will be rocked toward the right, w ere it will lie beneath the spring awls 265, of the multiplier keys not depresse whereby these keys will be locked in raised position.
This locking of the multiplier keys in raised position will prevent confusion of the registration by depression of Aa second key before completion of the registration determined by the first key. Such confusion might occur, in the illustrated embodiment of the invention, from` an attempt to .correct a multiplier figure; and also in certainpractical methods of operation, wherein the operator may have occasion to depress multiplier keys in rapid succession, without any time lapse or intermediate operation of any kind. The confusion might occur in the re istration of any successive multi lier gures, should the invention be applie to a machine equipped with an automatic shift for the numeral wheel carriage.
Bail 250 and lever 255 having been rocked to extreme position by partial depression of the multiplier key, an inclined edge 266 of the lower arm of said lever will contact with the roller 267, mounted at the end of an arm 268 secured to rock shaft 125, and b depressing said roller will rock' the sha 125 in a counterclockwise direction as viewed in Fig. 10. This movement, as previously ex plained, will start the machine in rotation in an additive direction. While bail 250 is in its intermediate position, shaft 125, lever 128 and lever 134 will hold pawl 136 suiiiciently depressed to avoid the tripping of trigger 31 (Figs. 20 and 26).
In order to stop the machine at the end of a number of cycles of operation determined ,by the multiplier key which has been depressed, the following mechanism is provided:
On slide 252 (Figs. 10-13) is mounted a pawl 269, which as bail 250 is rocked to the left will engage the rack teeth 270 formed in bar 271 slidably supported on the framing of the machine, and provided with a roller 272 engaged by the forked end of a lever 273 ulcruined at 274 to the framing and bearing a roller 275 engaged by a cam 276 mounted mese onshaft 4. The parts are held rearwardly against cam 27 6 by means of a spring Thus, at each rotation of shaft 4 siide 252 will be advanced a distance corres ondin to one tooth of the rack 270 and wil be hel in progressively advanced position by means of a springpawl 278, 'ivoted to the framing, an enga ed byrac teeth 279 of slide 252 when bai 250 is swung to the left upon deression of a .multiplier key. In extreme eft hand position of slide 252, pawls 269 and 278 yield ightly, and will remain in enga ment with t eir rack teeth in the intermeigiliate position of the bail and slide, when the tooth 259 of the latter enters the notch 263 of the key. The teeth 259 on slide 252 which, as stated, lock down the multiplier keys, vary in breadth, the tooth cooperating with the 1 key being adapted to be moved out of register with the keys upon forward movement of slide 252 one step; the tooth cooperating with the 2 key normally extendin rearwardly of the key stein a suicient istance to register therewith until slide 252 has been moved forwardly two steps, etc. rogressively, until the tooth cooperatingiwith the 9 key provides for registration until the slide has been moved nine steps. In Fig. 13 the slide 252 is shown as having been advanced four steps by four rotations of the actuating means of the inachine, and, since the 5 key is depressed, the next rotation of the actuating means will release the key. Upon release of the key, bail 250 with slide 252 returns to normal position, releasing the pawls 269 and 278, and allowing slide 252 to return to its normal rearward position under the action of spring 253. The return of bail 250 to normal position also restores lever 255 to normal position, releasing roller 267 and shaft 125 whereby the actuating means will be stopped in the manner previously described.
It has been stated that upon return of shaft 125 to normal position upon release of the add, subtract or a multiplier key, the machine will continue in operation until the actuators reach full cycle position. Preferably, in the construction illustrated, cam 276 will advance slide 252 in the mid-cycle position of the numeral wheel actuating means, and for this reason it is desirable to prevent the depression of a multiplier key during the interval between the release of the key previously depressed and the completion of the stopping action. For this purpose a spring latch 280 (Figs. 17 and 18) 1s provided to hold the locking bail 254 in engagement with the pawls 265 of the keys. In normal operation, linger pressure upon the multiplier key being removed before the release of the key from slide tooth 259, the multiplier key spring 285 will restore the key to raised position, the pawl 265 of said key yielding as it is moved past locking bail 254 and returning to normal position above said bail, to
.lock the key against a second depression before the machine has been brought to rest. In eiecting the stip, rock arm 24 is been ht 'nst stop 29 an he parts are allw to re und, as previously stated, until the crank connections 20, 21 having passed througlh dead center position, arm 24 is again broug t into contact with stop 29. During the tirst or additive contact with the sto the push rod 47 pivoted to arm 24 will be eld by pin 50 of link 21 out of contact with a lever 283. During the rebound, the parts movin in a subtractive direction, pin 5l) ill ho d the push rod 47 in position of contact with lever 283,150 that the latter will be actuated and a camarm 281 thereof brought a ainst latch 280 to move the same and release ocking bail 254. The locking bail, being released, is returned to normal position by sprin 282 and the multiplier keys are free to be epressed. It is desirable that any operative impulse imparted to a multiplier key should become etlective (provided pressure is continued until the key yields under the finger), even though an operator attempts to depress it while it is still locked by bail 254, the machine not having completed a previous mu1tiplier operation. At this time pawl 265 acts like a rigid part of the multiplier key, pressure on the key pressing this pawl forcibly against lock bail 254, and unless these parts are properly related, pawl 265 would tend to bind the bail 254 and prevent it from releasinor the key when latch 280 releases bail 254. It, however, the lower end of pawl 265 is provided with a slight camming angle as shown in the drawings, pressure applied to tlie multiplier key will tend to force bail 254 toward its normal position, so that when latch 280 is released pawl 265 will cam over the bail 254 and the multiplier key will be free to initiate the intended multiplier operation.
Should a multiplier key be held in de pressed position by the operator, bail 250 will return to its normal position at the proper time'and the machine will be stopped in accordance with the value of the key. In such case slide 252 will be held in forward position by engagement of its projection 259 with the front face of the key stem. Upon manual release of the key slide 252 will return to normal position.
The multiplier mechanism is so designed that during the depression of a multiplier key the subtract ke will be locked in raised position, and during the de ression of the subtract key the multiplier eys will be locked in raised position. This is due in the first instance to the latching of bail 250 and lever 255 in the position shown in Fig. 15 upon the depression of a multiplier key, whereb the rise of roller 267 and the rocking of sha 125 in a clockwise direction from the position shown in Fig. 26 will be prevented. 0n the other hand, depression of the subtract key (Fig. 9) will act to raise roller 267 to a position above-the cam edge 266 of lever 255 and in the path of movement of said lever, whereby bail '250, slide 252 and keys 261 will be locked in the position shown in Fig. 14.
Should a transitional carry occur in multiplication, owing to accumulation upon numeral wheels 13, in excess of the capacity provided by the carry mechanism, the -multiplier means are designed to permit reversing clutch lever 111 to be moved to neutral position, since the bail now stands in an intermediate position determined by the stop Wall of notch 263 of the key. Shaft 125 and setting lever 128, therefore, stand in a partially retracted position, wherein pin 130 is allowed suiicient movement in slot 129 to provide for said movement of lever 111 to neutral. Under such conditions, the loss of carry will, of course, give an incorrect registration upon the numeral wheels, and it is desirable that the error be called to the attention of the o erator. This is done by the stopping of t e machine with the multiplier 'keys remaining locked, since the key locks are not released until the successive revolutions of cam 276 have advanced slide 252 suliiciently to bring the tooth thereof out of registration with the key notch.
The loss of carry being noted, it is necessary to continue the interrupted rotations until the multiplier keys are released. The tripping of trigger 31 by the numeral wheels will leave pawl 136 set to trip said trigger` again upon release of the multiplier key. De ression of the add key will serve to move sha 125 from the' position illustrated in Fig. 26 to that of Fig. 8, whereupon the clutch will be re-engaged in additive position. Finger pressure being immediately removed from the add key, pawl 136 will be held depressed until the release of the multiplier key, whereupon the operation will be terminated. It is to be noted that upon interruption of the operation, the subtract key will remain inellective, and that any key capable of re-engaging the clutch will act under these conditions to complete the multiplier operation.
Rotation of crank Ahandle 3, attached to driving gear 76, would also serve to continue the multiplication and advance the slide. Upon the final cycle of predetermined operation, the multiplier keys will be released, this serving as a signal to the operator to bring the parts to rest with the crank handle in full-cycle position. The loss of carr having been noted, the operator may, it desired, cor-` rect the product reading by moving'the carriage and registering the numeral 1 in the proper place.
I claim:
1. In a calculating machine having numeral wheels, actuating means therefor, driving means for said actuating means includi y il ing a motor, and a clutch between said drive ian



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