Jan, 7, 1g47. L, R QRQSMAN . ZA-HQQZ?’ PARTIAL PRODUC T S TRUC TURE Filed Nov. 20, 1945 6 Sheets-Sheet 1 Jan. 7, 1947. '- L. P. CROSMAN ZAMMZ? PARTIAL PRODUCT STRUCTURE Filed Nov. 20, 1945 6 Sheets-Sheet 2' p’ BY (/t z P 1259” . INVENTOR has/ham ATTORNEY Jan. 7, 1947.. L. P. CROSMAN 2414,27 PARTIAL PRODUCT STRUCTURE Filed Nov. 20, 1945 e Sheets-Sheet 4 Jan. 7, 1947. _ ._, P, CROSMAN ‘ 2,414,027 PARTIAL PRODUCT STRdCTURE ‘ Filed ‘Nov. 20, 1945 ‘2726 6Shee’cs-Sheet E ?e 3 4 66807-9 kaa 68.9685 69.58 _ INVENTOR Ianingu? I'm/mm W/T/VHS BY égl/M I ' ' I . wTTORNEY Patented Jan. 7, 1947 2,414,027 UNITED STATES PATENT OFFICE 2,414,027 PARTIAL PRODUCT STRUCTURE Luring Pickering Crosman, South Orange, N. J., assignor to Monroe Calculating Machine Com pany, Orange, N. J., a corporation of Delaware Application November 20, 1945, Serial No. 629,777 1 Claim. (01. 235—61) 1 The invention relates to an improved means for selecting and registering partial products in multiplying machines. 2 fecting this result form no part of the present invention, they have not been shown in the pres ent application. However, in so far as the disclo In prior decimal system machines of this type sure of the Fleming application may be per the graduation of the partial product plates rep~ C1. tinent as providing for an advantageous appli resenting the units and those representing the cation of the present invention in a complete ma tens digits of the partial products related to a chine, such disclosure is made of record. given multiplier digit have consisted of series Alternative arrangements, coming within the of stepped faces of eight or nine steps each, with scope of the present disclosure, will be consid a corresponding extension of the plates in two of 10 ered more conveniently in connection with the de their dimensions. This, together with similar tailed description of structure. provision for the remaining multiplier digits, and Entering the factors the duplication of the entire partial product table in each denominational order of the ma In accordance with above noted disclosure, chine, has resulted in the employment of an as 15 amounts set up by the digit keys 2l5 (Fig. 1) sembly of plates of considerable mass and extent. may be transferred to an accumulator Ii 3, upon The present invention provides means for em operation of the machine, by means of a series ploying a lighter, more compact plate assembly, of differential actuators 6lii. These differential and it consists in the novel construction and com actuators are spring operated, and are normally bination of parts, as set forth in the appended 20 restrained by frame Hi6. Each actuator Sill is claim. , fulcrumed at 608, a forward arm thereof having segmental. gear teeth for rotating an accumulator wheel and an upper arm being pivotally connected with a digit index bar M5. The actuators are factor keyboard of a listing machine to which 25 normally held under restraint of a series of col the invention has been applied. umn latches 2 M, each latch being releasable upon Fig. 2 is a left side elevation showing various depression of any key 255 in the same column by multiplication control devices. means of a slide 2 l3. Upon operation of the ma Fig. 3 is an enlarged left side elevation of the chine and consequent movement of the frame 6 l 6, factor value locking means and of certain mul the released actuators will be rotated countertiplication control cams. clockwise each until stopped by contact of a lug Fig. 4 is a vertical section taken through the of the related index bar Gilli with the stem of a In the accompanying drawings illustrating the invention: Fig. 1 is a vertical section taken through the parts lying forward of the keyboard. Fig. 5 is a detail perspective view of a portion of the units feeler actuating means. Fig. 6 is an axial section through the partial depressed key. The multiplicancl is set up on keys 2|5, and the partial product plates are adjusted accord ingly during a non-add operation of the actuators product plates. 5m. During this operation accumulator 413 is Fig. '7 is a detail right side elevation of the par moved out of mesh with the actuator segments, tial product transmission means. and a cam till (Fig. 2) is rocked by a shaft Sill, Fig. 8 is a section taken on line 8-8, Fig. 4i. 40 to reciprocate frame Sit in known manner. Fig. 9 is a detail plan view of the tens feelers and The setting movements imparted to the actu associated parts. ators Bill during the forward stroke or cam 3H5 Fig. 10 is a series of detail elevations show are transmitted to related stop plates 536 (Fig. 1), ing the ?ve partial product plates. loosely mounted upon a shaft 53'! and held in Fig. 11 is a timing diagram illustrating the 45 contact with the actuators by springs At movements of various parts. the end of this forward stroke the stop plates The ?ve partial product plates herein illustrat are locked in adjusted positions by engagement of ed provide for the products involving the multi a rotary bar 569 with graduated faces of said plier digits from 1 to 5. (‘Jo-pending applica plates. Bar 509 is rocked into locking engage tion Serial No. 629,841, ?led ‘by Howard M. Flem ing, of even date herewith, and entitled Mul .tiplying machine shows means whereby these ?ve _'-plates may be used to control the registra tion of products involving all or the multiplier digits from» 1 to 9, but since the means for vef ment with the stop plates 595 by contact of a projection 5H3 (Fig. 3) of cam 3E8 with 2. lug 5| I of pivoted arm 5I2, contacting an arm 5&9’ of said bar, the locking engagement. being main tained during thereturn stroke of the cam by en gagement of a spring ‘latch 513 with lug 5! I. At 2,414,027 3 a the end of the return stroke of the parts, latch 5E3 will be lifted by a pin 5H1 mounted in the actuator segment 58%, in order to reduce the number of graded steps of the partial product cam, and bar 589 will be rocked to unlocking po plates, with a consequent permissible reduction of diameter. It will be noted that this reduction of diameter sition by a spring 5l5. During that portion of the non-add cycle in is further dependent, in the illustrated embodi ment of the invention, upon the limitation of the tens value feelers to a travel of four steps, made which the multiplicand value is locked in the plates 566, a series of feelers will be brought into contact with said plates, whereby the values will be entered in the partial product plates. possible by the employment of the semi-comple mental multiplier arrangement set forth in the hereinbefore mentioned Fleming patent appli cation. However, the same advantage would be obtained with a complete partial product table, For this purpose a bail 528 (Fig. 4) is rocked clockwise, said bail lying in rear of a series of spring impelled segments '529, loosely mounted upon a shaft 536. Upon release from the re representing values from 1 to 81, since the two straint of bail 528, the segment springs 53] will rotate the segments clockwise until feelers 532, pivotally connected thereto, come into contact with studs 533 of the adjusted stop plates 506. The segments 523 mesh with intermediate gear members 5%, meshing in turn with gears‘ 531', ieeler arrangementshown as applied to the units values might be duplicated for the tens. The settings of the two feelers are combined as follows: - " Feeler 6'i9 has pin and slot connection with the outer end of a pivoted arm E35, mounted upon a each rotatably connected to a series of ?ve par tial product plates 538 (Figs. 6, '7, 10), mounted plate 685 supported upon the auxiliary actuator upon a sleeve supported upon a shaft ‘539. Clock shaft 68?, arm 585 being provided with a stop lug 638 designed for contact by one of a series of wise rotation of the related segments 529 will thus of plates a number of steps (from one to nine) in accordance with the multiplicand value set in graded stop shoulders of the actuatorsegment eat, the shoulder making contact being deter mined by the degree of clockwise adjustment of the corresponding stop plate 506. the feeler. The shoulders of the segment are so rotate the partial product plates 538, each series e spaced as to provide for 0, 3, 6, or 7 steps of move As shown, a partial product plate is provided ment, controlled by four evenly graded steps of to represent the products of each multiplier digit, and the multiplier is selected by moving the se 30 the partial product plate. Feeler 589 is provided with a stop lug 5S8 designed for contact with one ries of plates laterally, to bring the required of a series of three evenly ‘graded stop shoulders plates opposite the feelers which control the reg of the plate 686, the shoulder making contact istration. For this purpose, it may be noted, the being determined by counter-clockwise adjust intermediate gearing 534 is swung forward, out of mesh with the gears 53?. Obviously, with a 35 ment of the feeler, controlled by three evenly graded steps of the partial product plate. Upon different arrangement of the values upon the contact of the segment with stop E88 plate 688 partial product plates, a different method of mul will be carried counter-clockwise, against the ten tiplier selection might be employed. sion of its spring see, so that the pivotal support Registering the partial products 40 of arm 585 will be carried forward to allow for 0, 1 or 2 steps of movement of the actuator seg The multiplication is effected by rotation of an operation control shaft 56? (Figs. 2 and 3) upon ment.v Therefore, by combining the settings for which are mounted a series of cams which act to determine the calculation and registration of the partial product values. Cam 868 (Fig. 3) operates the units value feel ers, this being the ?rst operation effected during additive calculations (see diagram, Fig; 11). A spring urged cam follower 669 is rocked counter clockwise by cam 868, said follower, through link Elli and bell-crank lever ?ll, rocking a shaft 673. Shaft 6'53 has link connection ?'lZ with a pair of arms supported upon shaft EM (Figs. 4 and 7) and having pivotal connection 616 with a pair of hangers Eli’ (Fig. 5) engaging perforations of : two spaced bars 518, riveted together to form a rigid frame. This framevhas yieldable connec tion with the units feelers Elli, 680, there being a pair of such feelers related to each accumulator l or 2 steps of movement with the settings for 3, 6 or '7 steps any of the digits from 1 to 9 may be registered. _ The tens feelers 69! are operated through a shaft 695. Keyed to shaft 695is a series of arms 596 (Figs. 4, 7, and 9) having yieldable drive con nection by means of the transverse spring 691 with a series of stops 698, loosely mounted upon shaft 695 and having each pin and slot con nection with a tens feeler 69L The stops and feelers are normally located by contact of the stops with overlying lugs of the arms 6%. The rear ends of stops 6%’ are designed to be con tacted each by one of a series of ?ve graded stop shoulders of the actuator segments 684, in ac cordance with the contact of feelers 69! with one of a series of ?ve graded steps of the partial wheel unit. Each yieldable connection comprises 60 product plates (see Plate 5x, Fig. 10), to provide for registration of the values 0, 1, 2, 3, 4, upon a link 68!, pivotally connected with its feeler and clockwise rotation of the segments. During these having a slotted extremity engaging a notched operations the vpartial product plates are held in portion of one of the bars 618, a spring 682 bear set position by spring detents 699 (Fig. 4) en ing against a shoulder of the link and against gaging the gears 537. the bottom of the bar. Upon rocking movement The auxiliary actuatorsegments 684 are driven of shaft tie frame bars 678 will be depressed, and by a pair of complemental cams ‘F20 (Fig. 3), feelers are, 63%] will be rocked about their pivot through cam follower ‘Hi, link ‘I22, arm ‘I23 and 58-3, each pair into contact with the selected par, shaft 724i. Shaft 124 has yieldable drive con tial product plate 538 of its related group, the spring 582 yielding when such movement is in terrupted by contact of afeelerwith the plate. “ Two units feelers are employed ‘in each order, and their settings are combined to provide for a differential oneto nine step counterolockwisero tation or the related auxiliary or multiplication nection with a series of segments T25 (Figs. 4, 7, 8) , the connection-being effected by aseriesof U shaped plates 126, having each spline connection with the shaft and lugs‘upon', its opposite arms normally engaging theopposite ends of a spring vs 121, said spring also normally engaging lugs of 2,414,027 5 two adjacent segments ‘I25. This arrangement provides a yieldable drive of the segments upon rocking movement of shaft 124 in either direction from the normal position illustrated in Figure 4. Each segment 125 meshes with a pinion ‘I28 hav ing ?xed connection with one of the auxiliary actuator segments 684, so that the latter segments will be driven against the feeler connections upon movement of shaft 124. ‘ 6 in the calculation of the previously noted ex ample, 4 X 775. The partial product plates marked 4m in Figure 10 are brought opposite the feelers 619, 680, and 69!. Three of the partial product plate groups have been advanced to represent the multiplicand, the groups in the hundreds and tens orders seven steps and the units order group five steps. In During each calculating cycle, the accumulator 10 the hundreds order feeler 619 (Fig. e) enters two pinions 403 will be meshed with and unmeshed steps in contacting the plate 538, positioning the from actuator segments 684 under control of a lug E88 opposite the third shoulder inward from cam 129 (Fig. 2). Cam 129 acts through cam the periphery of segment 684, to represent the follower 130 to rock an arm 13!, fast with one value six. Feeler 68$ enters two steps, bringing arm of a toggle I0 which has connection with 15 lug 689 opposite the outer shoulder of plate 686, the accumulator shaft 412. The successive actions effected by the calcula and thus allowing two extra steps of counter clockwise movement of the segment, which, add tion controlling cams may be traced on the ed to the six steps allowed by feelers 619, gives diagram, Figure 11, as follows: a total of eight steps to represent the units value During an additive cycle of operation, cam 668 20 of the partial product 23. Feeler 69! enters two ?rst operates the units feelers to position the steps in contacting plate 538, providing for two stop lugs 688 and 689 (Figs. 4, 7) in accordance ‘ steps of movement of the thousands segment 684, with the units values. Cams 120 then act to In the tens order the feeler actions are the same, rotate the auxiliary segments 684 counter-clock except that the units and tens of the partial wise, into engagement with lugs 688, in which product are registered in the tens and hundreds position the segments will be held while cam 129 order, so that, in the hundreds order, segment, acts to move the accumulator pinions 403 out of B84 is allowed eight steps of counterclockwise mesh with the lister actuator segments BIO and movement and, during the return or clockwise into mesh with the auxiliary actuator segments stroke will move eight steps to its neutral position 684 and while a cam (not shown) acts to rock < plus two steps beyond that position, giving a, reg shaft 695 and operate the tens feelers to position istering movement of ten steps. Finally, in the the stops 698 in accordance with the tens values. units order, where the partial product plates were This is the position of the parts illustrated in advanced ?ve steps, feelers 5'19 and 680 are held Figure '7, the dot dash showing of segment 684, in on the extreme outer surface of plate 538, to pro dicating a registration of nine and the fragmen- ‘~' vide for contact of the outer shoulder of segment tary full line showing indicating a zero. Cams 684 with lug 68B and plate 686 is held against 120 will now act to rotate the segments 684 movement, so that no counterclockwise move clockwise to their normal position, to register the units and beyond said position, into contact with ment of segment 684 can occur. Feeler 69! how ever enters two steps, so that an additional two the stops 698 to register the tens, a maximum of 40 step movement of the tens order segment 538 is thirteen steps of movement. Cam 568 will now retract the units feelers and cams 120 will un mesh the accumulator pinions from segments 684 and mesh them again with the lister actuator segments 6H], during which time the segments 684 will be held stationary. Cams 120 will next return the auxiliary actuator segments 684120 and slightly beyond their normal position, to afford clearance with the tens stops 698, which provided for, representing the partial product 20. Thus during the calculating cycle, the four right hand segments 538 will register the values 2800, 280 and 20, which will be accumulated as 3100. I claim: In a multiplying machine having an actuator segment and a selectively settable partial product plate provided with two series of graded stop faces; a member settable to variably limit the extent of movement of the actuator segment, tWo are then restored by their cam. Finally, ‘the segments 684 are moved through the true neu tral position into their normal position of rest, in which clearance is provided with the units lected stop face of its related series, and differ ential connections between the feelers and the lugs 688. settable member designed to transmit adjustable \ Example The operation of the partial product calcula ting mechanism above described may be illus trated by following through the actions involved feelers each adjustable into contact with a se movement of one or alternatively of both said feelers to variably set said member in accordance with the setting of the partial product plate. LORING PICKERING CROSMAN.