US2192599A - Multiplying machine - Google Patents

Multiplying machine Download PDF

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US2192599A
US2192599A US82082A US8208236A US2192599A US 2192599 A US2192599 A US 2192599A US 82082 A US82082 A US 82082A US 8208236 A US8208236 A US 8208236A US 2192599 A US2192599 A US 2192599A
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contacts
magnet
cycle
accumulator
card
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Lang William
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International Business Machines Corp
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International Business Machines Corp
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/46—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using electromechanical counter-type accumulators
    • G06F7/462—Multiplying; dividing
    • G06F7/467—Multiplying; dividing by using preset multiples of the multiplicand or the divisor

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  • the present invention has for one of its objects the provision of an improved type of multiplying machine in which the method of computation, technically known as duplation, is employed.
  • a multiplicand is repeatedly 'doubled to build up the product.
  • a further 'object of the present invention re ⁇ sides in the provision of a multiplying accounting machine adapted to effect multiplication by i'lrst eiiecting a separate setting of the multiplicand for each denominational order of lthe multiplier and thereafter automatically raising each entry to the product of the multiplicand times the associated multiplier digit, so there will be a setting of a number of sub-products, each representing the multiplicand times a digit of the multiplier. 'Ihese sub-products are thereafter gathered or added together to produce the final product.
  • a further object of the invention is to provide 25-mechanism wherein the number of operations required to obtain the several sub-products varies according to the value of the multiplier.
  • a further object of the present invention re- ⁇ sides in the provision of a machine in which the construction is simplified and improved for ease of assembly and maintenance.
  • a further object of the invention is to provide a machine in which a plurality of accumulators are provided and in which the entries may be repeatedly doubled and in which the number of repetitions for eachaccumulator is variable.
  • Figs. l, la, and 1b taken together and arranged verticallyin the order named, show the wiring diagram of the electric circuits of the machine.
  • Fig. 2 is a view showing the manner in which a typical computation is performed by the machine.
  • Fig. 3 l s a view showing a further example and the manner of its computation as performed by 55 the machine.
  • Fig. 4 is a. view showing the driving mechanism for feeding the record cards.
  • Fig. 5 is a view showing the card advancing and analyzing mechanism. 1
  • Fig. 6 is a view showing the accumulator resetting mechanism.
  • Fig. 7 is an isometric view showing one order of the accumulator mechanism.
  • Fig. 8 is atiming chart showing the timing of the electrical devices of the machine.
  • Fig. 9 is a sectional view of the printing mechanism.
  • Fig. 10 is a view of a controlling record card in which multiplicand and multiplier factors are f perforated.
  • Fig. 1l is a portion of the circuit showing a y modied arrangement.
  • Fig. 12 is a' further portion of the circuit showing a modified arrangement.
  • the machine carries out multiplication in the following manner.
  • the record card bearing the two factors to be multiplied is first advanced to pass two analyzing stations.
  • the multiplier factor is read to determine the number of computing cycles requred for the problem.
  • the multiplicand is analyzed and this factor is entered into as many separate accumulators as there are possible positions in the multiplier.
  • a further entry is made into a so-called MC accumulator. This entry is represented diagrammatically in Fig. 2 where 642 represents the multiplicand and 375 represents the multiplier. Under the column heated Cycles, it is indicated that during the first cycle the multiplier is read.
  • a doubling operation is represented in Fig. 2 by the curved arrows pointed downwardly to the next line, indicating that the amount in the accumulator is added to itself or doubled.
  • a transfer operation is indicated by an arrow extending from the amount in the MC accumulator to one of the other three accumulators, indicating that the amount standing in the accumulator MC has been added to such other accumulator.
  • ACC#1 the sub-product of three times the multiplicand is obtained by doubling the initial entry once and transferring from the MC accumulator once.
  • ACC#2 the sub-product of seven times the multiplicand is obtained by doubling the entry twice and transferring the amount in the MC accumulator three times in succession; and the sub-product in ACC#3 is obtained by doubling twice and transferring once.
  • the multiplier factor containsa digit 5'but no 6, 7, or 9, then the sub-products will be obtained in three cycles, and if the highest digit in the multiplier factor were 2, a single cycle would suffice to obtain the sub-products.
  • ACC#1 is to compute a sub-product of the multiplicand times one; ACC#2 the multiplicand times zero; and ACC#3 the multiplicand times four.
  • the amount in ACT/#1 is entered into ACC#3 during the eighth cycle and during the' ninth cycle the amount in ACC#2 is entered into ACC#3, giving a total or nal product of 240,750, which, during the subsequent cycle, is printed on a suitable record and all of the accumulators are then reset to zero.
  • the analyzing brushes are indicated at UB yand LB and the record cards R are successively advanced by picker II to a rst pair of feed rollers I2 which serve to advance the cards tofurther pairs of feed rollers I3 which advance the cards to pass the upper and lower brushes in succession.
  • the shafts upon which rollers I3 are mounted are provided with gears I4 at their extremities and arranged as shown in Fig. 4 to be driven through gearing I5 from gear I6 on the drive shaft I0. It is thus seen that the rollers .I3 are in constant rotation. From one of the gears I5 a gear I1 is driven through an idler I8, which gear I1 is freely mounted upon a shaft I9.
  • a gear 20 which vserves to drive the picker mechanism and the rst pair of feed rollers I2. Also secured on shaft I9 is a clutch arm 2
  • the drive shaft 21 (Fig. 7) is directly geared to the main shaft I8 in Fig. 4 so that it is in operationas long as the driving motor of the machine functions ,and the driving ratio is such that shaft 21 makes one revolution for each card vfeeding cycle of the machine.
  • the shaft 21 has slidably mounted thereon but keyed for rotation therewith a clutch element 28, one for each denominational order of the accumulator.
  • 'Ihe element 28 is provided with a groove in which fits the end of a short arm of a lever 28 which is pivoted as shown and provided with a block 88 normally held as in Fig. 7 by armature latch 8
  • a leaf spring 88 bears against the extremity of the longer arm of lever 28 and moves the same in a counterclockwise direction upon release of block 88 by armature 8l. This movement will bring clutching member 88 into engagement with cooperating teeth 84 integral with a gear85 loosely mounted on shaft 21. Gear 85, when thus coupled to shaft 21, will rotate a gear 88 which meshes f therewith and ⁇ will displace the accumulator index wheel 81.
  • the rearward extremity of member 28 is adapted to be engaged by a flnger'88 toward the end of the cycle for the purpose of disengaging clutching element 28 from teeth 84 and relatching block 80 on armature 8l Briefly summarizing the adding operation, the
  • magnet 82 may be energized at various points in the cycle of the machine depending upon the location of a perforation in a column of the card analyzed by the lower brushes LB. This energization may take place in response to a perforation in any of the index point positions from 9 to l, inclusive. A perforation in the 9 index point position will trip theclutch element 28 nine steps before linger 88 is operated to declutch it and a perforation in the 1 index point position will trip the clutch element 28 before it is declutched by the finger 88.
  • Each step Qf clutching engagement corresponds to a tenth of a revolution of the accumulator index wheel 81 so that a 9 hole will cause it to move nine-tenths of a revolution and the 1 hole will cause it to move ⁇ one-tenth of a revolution.
  • the manner in which circuits through the lower brushes LB control the operation of magnet 82 will be set forth in connection with the explanationof the circuit diagram. Suitable carry mechanism between the several orders of the accumulator mechanism are provided.. and these are exactly similar to that shown in the Patent No. 1,976,617 so that illustration thereof is omitted.
  • gear 85 Also driven by gear 85 (Fig. 7) is a gear 85.
  • gears 88 and 85 Since the ratio of gears 88 and 85 is 2:1, the former will turn through a half revolution for each revolution of the latter. Carried by and insulated from gear 88 is a pair of electrically connected brushes 48 one of which cooperates v successively with ten conducting segments 4I,
  • Vthe other brush will be in contact with the arcuate strip 42.
  • the positioning of the brushes 48 provides a convenient electrical readout mechanism for controlling doubling, transferring, gathering, and product printing operations, and the electrical circuits involved in these functions will be more fully explained in connection with the circuit diagram.
  • Printing mechanism The printing mechanism is shown in Fig. 9 where the usual so-called listing shaft 48 carries a clutch driving element 44.
  • 'Ihe shaft 48 has direct driving connection with the constantly running shaft i8 (Fig. 4) so that clutch driving element 44 may rotate continuously.
  • 'Ihe listing cam 45 is freely carried on the shaft 48 and provided with ⁇ a spring-pressed clutching dog 48 adapted for engagement with the driving' element 44. Dog 48 is normally held out of engagement by arm 41 controlled by magnet 48.
  • gear 85 which is adapted to be driven by an intermittent gear 86 which is secured to shaft 81.
  • arm 88 which carries spring-pressed clutch dog 88 normally held in the position shown in Fig. 6 by a latching arm 18 supported by armature shaft 1I .of magnet armature 12. Energization of magnet 18 will release dog 88 for engagement with clutch driving element 14.
  • Element 14 is integral with a gear 15 which meshes with a gear 18 secured upon constantly running shaft 48. y
  • driving element 14 is in constant rotation and whenever it is desired to eiiect resetting of the accumulators, magnet 13 is energized to provide a connection between the element 'I4 and the resetting shaft 64.
  • FIG. 1, 1a and 1b The wiring diagram of the electric circuits of the machine is shown in Figs. 1, 1a and 1b, wherein the various cam controlled contact devices are diagramatically shown and suitably labelled L, CR or TP for identification.
  • the cams prexed L operate only during the card. feed cycle.
  • rI'he cams prefixed TP operate only during the total print and reset cycle, while there prefixed CR and the emitters prexed E are an constant operation.
  • the timing of these con,- tact devices is shown in the timing diagram (Fig. 8) to which reference may be made for the actual time in the cycle of operations during which they function.
  • the switch. I1 is rst closed to connect the motor M between the mainlines and 90. With the motor M in operation, the several constantly rotating shafts and the CR cams and emitter brushes commence rotation. At the very commencement of operai tions, the brush of emitter E4 (Fig V1) is permitted to make a number of turns before the start key is operated. This is for the purpose of eiectiug a preliminary set-up of the relays generally designatedC near the bottom of Fig. 1;
  • yemitter EI the 1 that is, during the first turn when the brush is on the g segment, a circuit is traceable from line 80 through wire 89, brush of emitter E4, segment y, Wire 9
  • Relay C closes its contacts CI to provide a holding circuit through wire 85 and also closes its contacts C2 and C3.
  • ⁇ brush of emitter E4 is on the f segment, a circuit is traceable through contacts C3, relay magnet IC and thence serially through the contacts IBI to 6BI to line 90.
  • the card will be at the dotted line position shown in Fig. 5.
  • a second depression of the start key 'I8 will again energize magnet 25 and the first card R will advance to pass the upper brushes UB While the second card is advanced by the picker II.
  • the brush of emitter EI contacts the segments thereof in the order 9, 8, 7, etc.
  • cam contacts LI are closed and during the sensing of the zeroipositions, contacts L2 are closed and contacts LI are open.
  • a circuit will be completed from line 80 to cam contacts CRB, card lever contacts UCLI, nection 19, cam contacts LI, wire SI, brush of segment of emitter EI, wire 82, relay magnet IB, wire 83, to line 90.
  • Cycle controlling circuits At the bottom of Fig. 1 is shown a group of relays designated C, IC, 2C, etc., which determine the number of variable cycles which are to be performed. 'Ihese relays are normally energized through circuits of which the following for magnet C is representative: This circuit follows from line 90, wire 84, serially through contacts GBI, 5BI, to IBI, magnet C, contacts CI, wire 85, to line 80. This initially setup circuit is prepared, when cards are fed through the machine in succession, during the last computation and the manner in which it is set up when the machine is first started has already been explained.
  • any magnet IB to 6B will shift its contacts from the position shown and will interrupt the just traced holding circuit at such point to deenergize the related magnets C to 6C and all magnets of lower order. For example, if magnet 6B were energized in response to the analysis of a '7 perforation, contacts SBI would open momentarily and all the magnets C to 8C would be deenergized. If magnet 3B were the highest order magnet in its group to be energized, it would open its contacts 3BI and cause deenergization of magnets C, IC, 2C and 3C while magnets 4C, 5C, and 6C remain energized.
  • Energization of any of the B magnets will close a pair of contacts IB2 to 6B2, as the case may be, to establish a circuit from line 90, wire 84, contacts 8B2, for example, wire 86, a relay magnet Y, wire 81, resistance 88, to line 88.
  • Relay magnet Y closes its contacts YI which provide a holding circuit from line 90, contacts YI, magnet Y, wire 81, resistance 88, to line 80 and this holding circuit is maintained until the C magnets which have been deenergized are again set up in the manner which will now be explained. It may here be explained that the magnet Y, upon energization, opens a pair of contacts Y2 in the upper part of Fig.
  • Fig. 1 In Fig. 1 are shown contacts Y2, which, upon denergization of magnet Y will close to complete a circuit from line 80, upper card lever contacts UCL2, relay magnet IG, contacts Y2, cam contacts CRS, contacts P3, contacts 2Gi to line 88. Magnet IG will close its contacts IG5 ⁇ to provide a holding circuitfrom line 98, cam contacts CRI, contacts IGS, magnet IG, card lever contacts UCLZ, which are closed due to the presence of a card at the upper brush station, to vline 80. Magnet IG controls gathering operations which will be explained in detail later. During such operations, cam contacts CRS close. These contacts are timed to close momentarily and open again before cam contacts CR3 close.
  • a circuit is thereby established which is traceable from line SII, contacts CR5, relay contacts P2, contacts IGS, relay magnet 2G, to line 88.
  • Magnet 2G closes its contacts 2G5 to provide a holding circuit through cam contacts CRS and at the same time opening of contacts 2GI prevents reenergization of the magnet IG.
  • Magnet 2G controls gathering operations during the second gathering cyclek and during this cycle cam contacts CRT close momentarily to establish a circuit from line 90, contacts CR'I, relay contacts 2G8. relay magnet P, to line 88. Magnet P will close its contact PI to provide a holding circuit through cam contacts 'I'P4 and the consequent opening of contacts P2 and P3 will prevent further energization of the magnets IG or 2G.
  • the magnet P controls the total printing circuits as will be explained and in addition closes a pair of contacts P4 at the top of Fig. 1 which will complete the circuit through the print cam clutch magnet 48 and the reset clutch magnet 'I8 to initiate a cycle of operation of these mechanisms.
  • contacts TF3 close to energize the card feed clutch magnet 25 after the accumulators have been cleared and the next following card will proceed to pass the upper brushes.
  • magnets IB to 6B are energized to determine the number of cycles required for the card sensed. It may be mentioned at this point that for each card passing through the machine, there are two card feed cycles, the first card feed cycle being that in which the card traverses the upper brushes and the second being the cycle in which it traverses the lower brushes.
  • first card feed cycle designates the cycle in which the card passes the upper brushes
  • second card feed cycle designates the cycle in which the card passes the lower brushes.
  • the multiplicand amount is entered into the four accumulators MC, #1, #2, and #3.
  • the entering circuits are traceable (Fig. lb) from line 90, through cam contacts CR9, card lever contacts LCL, lower brush LB, and through plug connection 9
  • connections 93 are made as shown to sockets 94 which have connections with relay contacts
  • the relay magnet H is deenergized and contacts H2 are open.
  • the cam contacts L4 close to energize the relay H thereby closing its contacts HI to establish a holding circuit through cam contacts CRI.
  • the contacts CRI maintain magnet H energized through that portion of the next following cycle during which the card traverses the lower brushes so that at such time the contacts H2 are closed and they are open at all other times.
  • A, 2A, and 3A are energized in response to the presence of zeros in the multiplier factor.
  • magnet 3a would have been energized and its contacts 3A2 consequently opened so that ACC#3 would receive no entry from the brushes LB.
  • a circuit is traceable as follows: from line 90, wire 98, emitter E2, through wires 99, readout segments 4
  • the adding magnet 32 of the accumulator will thus be energized at the time determined by the position of the readout brush 42 in the related order.
  • 00 is made from the readout socket 96 to the contacts IT2, 2'I2 and 3T2 and further connection
  • a circuit will extend from line 90, wire 98, emitter E2, wires 99, segments 4I, brushes 40, readout strip 42, socket 96, connection
  • the magnet 32 of ACC#1 will thus be energized in accordance with the amount standing on accumulator MC.
  • Circuit selecting mechanism Referring to Table I, it will be noted that for each of the accumulators #1, #2, and #3,v the number of doubling and transferring cycles will depend upon the value of the multiplier digit associated with that accumulator. For example, if
  • each of the accumulators there is provided an emitter IE3, 2E3, or 3E3, provided with eight segments to a plug socket
  • the common ring of each emitter is wired (which are controlled by relay H) from which socket plug'connection
  • the magnet K would be energized through the emitter IE9; the l'f magnet K would be energized through its emitter 2E3; and the 9" magnet K would be energized through the emitter 9E3, and these magnets would remain energized throughout the subsequent calculating cycles, and until th'e commencement of the total printing cycle, at which time contacts 'I'PI open.
  • Magnets K also cause closure of relay contacts ⁇ K2V and K8 through which the doubling and transfer circuit controlling relay magnets D and T are energized.
  • These contacts K2 and K9 of each order of the multiplier are connected' by wires Ill to a group of vertical wires I
  • the first wire II5 to the leftof each group of wires is connected to one side of vline during the third cycle of operation.
  • next wire is rendered live during the fourth cycle; the next line,v during the fifth cycle; and so on,
  • the doublingl magnet ID is connected to three successive lines I
  • the transfer magnet IT is con.- nected to the fourth line and will be energized to eil'ect a transfer after the three doubling cycles have taken place.
  • the 8" position it will be seen that there are no K3 contacts and only K2 Stepping of the relay will advance the arms II1 fromthe 1to the 2 position, which they occupy during the second cycle wherein the card passes the lower brushes and entries are made into the several accumulators, and during such cycle also the relay magnets K are set up in accordance with the value -of the multiplier.
  • the arms II'I are advanced to connect the next wires 'I I5 to the line and this goes on until the cycle controlling magnets C have all been reenergized, at which time, as explained above, the magnet Y is short circuited and as a consequence its contacts Y5 (Fig. la) open, thus preventing further stepping of the arm II'I. Also, as explained above, upon deenergization of magnet Y, the gathering magnet IG (Fig. 1) is energized. 'I'his magnet also controls the contacts
  • the second gathering magnet 2G is energized to control the contacts 2G2 of Fig.'1b to effect a further gathering, and following this the magnet P is energized to close contacts P5 of Fig. 1b to perm printing circuits to be completed.
  • one of the contacts P8, IGS and 2GB (Fig. la) is open to prevent any energization of the D or T magnets through lines II5.
  • cam contacts TP2 (Fig. la) close to energize reset magnet
  • the lines II5 of each group are connected to a set of commutator. segments
  • the ratchet is held in position. by a retaining. pawl I2
  • the operation is'such that during the ilrst cycle in which theA card passes the upper brush station and the cycle controlling magnets C are set up to energize relay magnet Y (Fig. l), the related contacts YS (Fig. la)l are closed so that near the end of this cycle, contacts CB2 will complete a circuit from'line 99, contacts Y5, contacts CB2, stepping magnet
  • magnet 5B has causedmagnet Y to become energized and a holding circuit provided therefor.
  • the relay magnet C is energized and held.
  • the magnet Y opens its contact Y2 to prevent energization in the gathering magnet IG when contacts CRS close later in the cycle, and a further pair of contacts YB are closed to commence the operation of the stepping relay.
  • Second card feed cycle- During this cycle, the card passes the lower brushes and circuits are completed to enter the MC amount into each of the accumulators through the now closed contacts H2 and at the same time the MP amount is entered into the K relays through the contacts H3.
  • accumulators MC, I, 2 and. 3 each receive the amount 642 and through the emitters IE3, 2E3 and 3E3, the 3, I and 5 relay magnets K of the three sets of relays respectively are energized and held to represent the setting of the MP amount 375.
  • relay IC is picked up and the stepping relay advanced to the 3 position.
  • relay magnets ID, 2D, and 3D are energized and close their respective contacts ID2, 2D2, 3D2 through which circuits are completed from the readout devices of the accumulators Nos. l, 2 and 3 to their related adding magnets, whereby the amount in each of these accumulators is doubled as indicated along line 3 of Fig. 2.
  • relay magnet 2C is energized.
  • alcance l contacts IGZ direct entries from accumulator No. I to accumulator No. 3 to effect the first gathering operation represented along line 8 of Fig. 2.
  • contacts CRE close and magnet 2G will be energized and held through contacts CRS.
  • the sub-product of 6 is obtained by the doubling operations followed by two transfer operations, and '7 by two doubling operations followed by three transfer operations.
  • the 6 is obtained by a. single i doubling operation followed. by a transfer oper- Seventh cycle.-During the seventh cycle relay A magnet 2T is again energized and the transfer ation and then a second doubling operation, while the '7 is obtained by a ⁇ doubling operation followed by a transfer and then a doubling and then a second transfer operation. In this manner, a cycle of operation is saved when these digits are a part of the multiplier and the number of relays in the cycle control mechanism may be reduced.
  • Fig. l2 shows the modified arrangement of the circuits extending from the emitter EI and it will be noted that the relays 6B and 6C are dispensed with.
  • the emitter segments 5, 6 and a control the relay 4B while the segments 'I and 9 control the segment 5B.
  • the sets of lines II5 now have each onlyY four separate wires extending to segments I I6 which arearranged concentricaily about the common conductor In.
  • an accumulator entering means therefor, means for controlling said entering means to' enter an initial amount into the accumulator,'means settable by the accumulator to represent the amount standing therein, means including said settable means for controlling said entering means to enter into the accumulator the amount standing on the settable means to double the amount therein, means for rendering said last named f means effective, mechanism selectively settable in accordance with the value of a digit, cyclically operating control means, and means operated by said control means and said selectively settable means jointly for causing the operation of said rendering means, once or a plurality of times in succession, to effect doubling of said initially entered amount or repeated doubling thereof in accordance withl the setting of said mechanism.
  • record sensing means a pair of accumlators, entering means for each, means for controlling said entering means to enter an initial amount in each accumulator, means for each accumulator settable thereby to represent the amount standing therein, means including the settable means of one accumulator for controlling the entering means of the same accumulator to enter therein the amount standingon its settable means to double the amount therein, means for lrendering said last 'named means effective, means including the settable means of the second accumulator for controlling the entering means of the first accumulator to enter therein the amount standing on the settable means of the second accumulator to ⁇ thereby transfer the amount in the second accumlator to the first accumulator, means for rendering said last named means effective, mechanism selectively settable in accordance with the value of a record card perforation, cyclically operating control means, means operated by said control means and said selectively settable means jointly for causing the operation of the first named rendering means, once or a plurality of times
  • a entry receiving device an accumulator, means for effecting the entry of a like amount in each, means for reading out the amount in the accumulator and reentering the same to effect doubling of the amount therein, means for transferring the amount in the entry receiving device to said accumulator, means settable in accord- Aance with the value of a digit and arranged to determine, foreach digit set up, a sequence of operations for said doubling means and said transferring means to increase the initial amount in said accumulator to an amount representing the initial amount times the value of the digit set in said settable means, cyclically operating control means, means controlled by said control means'and part of said settable means for effecting the operation of said doubling means in accordance with the digit vset up, and further means controlled by said control means and another part of said settable means for effecting the operation of said transferring means in accordance with the digit set up.
  • a pair of accumulators entering means for each accumulator, means for causing said entering means to enter a multip;lcand factor in each accumulator, readout mechanism for each accumulator, separate connecting means for connecting the readout mechanism of one of said accumulators to the entering means of the other accumulator, further connecting means for connecting the readout mechanism of said other accumulator to its related entering means, a relay for rendering said first named connecting means eective, a second relay for rendering the second named connecting means effective, a device settable to represent any multiplier digit greater than I, a cyclically operating mechanism, circuit connections completed through said relays under joint control of said device and said mechanism in accordance with the setting of said device, to render said connections eflective in a predetermined sequence, an emitter coordinated with said cyclically operating mechanism for eecting transferring of the amounts standing in said readout mechanisms, through the connections rendered effective by the relays, to the said other accumulator whereby upon operation of the entering means the multiplic
  • an entry receiving device a plurality of accumulators, entering means for said device and for each of said accumulators, a readout device for said entry receiving device and for each accumulator, transferring connections between the readout device of said entry receiving device and the entering means of each accumulator, doubling connections for each accumulator between the readout device of each accumulator and the related entering means thereof, means for causing said entering means to initially enter a multiplicand amount into said entry receiving device and the same amount into each accumulator, means for causing the I amounts standing in the several readout devices to be transmitted to the several entering means through said connections, a multiplier set up device for each accumulator, each settable to represent a multiplier digit greater than I, means for each accumulator for completing its related transferring connections, means for each accumulator for completing its related doubling connections, a cyclically operable control means for each multiplier set up device, means jointly controlled by each control means and its related multiplier set up device for causing completion of the related
  • said transmitting means thereupon causing the amuse product in said one accumulator to be transmitted to said other accumulator.
  • means for sensing Ia record card for perforations representing a multiplier amount means for sensing said card for perforations representing a multiplicand amount, a plurality of accumulators, one for each possible digital position of the multiplier,
  • an accumulator entering means therefor, a settable device, means for entering an amount therein,
  • controlling means therefor to render said doubling means effective means for transferring the amount in said settable device to said accumulator, controlling means therefor to render said transferring means eilective, means settable to represent certain digits, cyclically operated control means and devices controlled by said settable means and said control means jointly and in accordance with the digit represented for selectively causing the control means for the doubling means to operate once or a plurality of times andfor thereafter selectively causing the control means for the transferring means to operate once -or a plurality of times whereby the amount initially entered in the accumulator will be increased to the product of said amount by the digit represented on said settable means.

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US82082A 1935-12-21 1936-05-27 Multiplying machine Expired - Lifetime US2192599A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722375A (en) * 1950-12-29 1955-11-01 Cie Des Machines Bull Sa Paris Multiplying devices for accounting machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975966C (de) * 1949-06-29 1963-01-03 Zuse K G Rechenmaschine zur Durchfuehrung von arithmetischen Rechenoperationen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722375A (en) * 1950-12-29 1955-11-01 Cie Des Machines Bull Sa Paris Multiplying devices for accounting machines

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DE657267C (de) 1938-03-04
GB487341A (en) 1938-06-20
FR48378E (fr) 1938-02-08

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