Патент USA US2404697код для вставки
July 23, 1946- 2,404,697 J. R. DESCH ET AL CALCULATING DEVICE Filed March 21, 1942 75m [/4 U 4 Sheets-Sheet 1 / an F,“ .w1m/u C 1md r O /3 n//_..0 P4 Ma 9Q m4£3 C m/o r- 7W a”. 3 .0 A 7 m m aZ.o/5 2 y Ijoscph R. Desch and Robert E. Mumma Inventors By ZGWP/M Their Agongy July 23, 1946- J. R. DESCH ET AL 2,404,697 CALCULATING DEVICE Filed March 21, 1942 4 Sheets-Sheet 2 HQ. 2 ?enomma f/ona/ I 0/5 fr/ bv/ar Z2 1501/. Z” jmrph R. Desch and Robert E. Mumma Inventors By W Their Attorney July 23, 1946- J. R. DESCH ETAL 2,404,697 CALCULATING DEVICE Filed March 21, 1942 2/7, 2/ 4 Sheets-Sheet 4 . 4 2224,” Jose h R. Beach and R0 rt E‘. Mumma Inventon Their Attorney 2,404,697 Patented July 23, 1946 UNITED STATES PATENT OFFICE 2,404,697 CALCULATING DEVICE Joseph R. Desch, Oakwood. and Robert E. Momma, Dayton, Ohio, assignors to The Na tional Cash Register Company, Dayton, Ohio, a corporation of Maryland Application March 21, 1942, Serial No. 435,740 21 Claims. (Cl. 235-60) 1 2 This invention relates to an electron tube cal is hereinafter described with reference to the drawings which accompany and form a part of culatlng device and more particularly pertains to this speci?cation. such a device for the ultra-rapid multiplying of Of the drawings: numbers, expressed in the binary system of nu Fig. l is a circuit diagram or the product ac merical notation, by the use or differentially con cumulator. trolled electron tubes. Fig. 2 is a circuit diagram of the denomina The invention includes a product accumulator tional distributor. having electron tubes representing the digits, Fig. 3 is a circuit diagram of the multiplier unit. which tubes are actuated by electric impulses, a di?erentially-controlled electric potential genera 10 Fig, 4 is a circuit diagram of the multiplicand ' unit. tor having electron tubes representing the digits Fig. 5 is a parallel table of binary notation comprising a multiplier, a differentially controlled and decimal notation. electric impulse generator having electron tubes In the binary system of numerical notation, representing the digits of a multiplicand, and an electron tube impulse producer and switching 15 there are but two digits, designated "0" and “1.” The absence of data in a denomination is repre means to distribute the impulses produced under sented by "0," and the presence of a unit of data control of the multiplier and multiplicand units in a denomination is represented by "1." On the to the proper denominational orders of the prod addition of another unit of data in a denomina uct accumulator. The invention further includes certain manual controls for introducing the prob 20 tion having at that time a unit of data therein. there are a return to the “0" condition 01' said lems and for starting and resetting the devices. The disclosed device is based on a numerical notation having two digits in each denomina tional order. which is known as the binary system of numerical notation. The digits are designated no» (‘1-’) Therefore it is the principal object of this in vention to provide an electron tube multiplying machine in which the calculation is performed solely by the ?ow of electrons. 30 Another object of the invention is to provide a multiplying machine having no moving mechan ical parts except for manual entry of the problem. Another object or the invention is to provide means for producing denominationally-desig 35 nawd impulses in groups which are distributed by denomination and a transier of one unit into the next higher denominational order. The follow ing examples of additions of one unit at a time will give an understanding of the numerical sys tem. plus equals plus 0 1 ecimal Eauivslcnt notation 1-?‘ 1 -1 nudism-21 -2 plus 1 eqplus usuT-Hn-Hu 1 equals 100-21 plus 1 -4 stages to selected denominations oi an accumu lator. Multiplication in the binary system by partial Another object of the invention is to provide an products is accomplished in the same manner electron tube denominational distributor, for de 40 as in the decimal system; for instance. nomination representing impulses, controlled iointly by a multiplier unit and a multiplicand 101 E5 in the decimal system; ll 8 in the decimal system unit. 101 Another object or the invention is to control 101 an electron tube di?erential impulse generator to equals E (us in the decimal system, or n+2l+m+2o repeat its operation a certain number of times automatically. Multiplication in the binary system by succese Another object of the invention is to provide sive addition is accomplished in the same manner means to multiply two binary numbers by oper as in the decimal system, but is much simpler, as, ating electron tubes di?'erentially and cyclically. 50 in muitipiyins by one in any denominational or With these and incidental objects in view, the der, the multiplicand is set down but once. A problem 01' multiplying 25 by 25 (decimal nota invention includes certain novel features of con struction and combinations of elements, the es sentials or which are set forth in appended claims and a preferred i'orm or embodiment or which tion) by successive addition will be carried out in the binary system and in the decimal system side by side for comparison. 2,404,697 4 ‘ . thethirdentryintotheQ'ordensaideni-riesk Bins-y 11001 ll Xllllll X25 11001 25 11M 11M . 20' 3 1 1001110001 ing made successively. By thus arranging the successive entry oi data in the accumulator, in_~ terierence oi the multiplication impulses and the interdenominational transfer impulses is posi tively avoided, and not dependent on timing. The accumulator, although shown to but six denominations, may be made in any number 01' Decimal at 28 25 25 035 10 denominations. It is seen by rei'crence to Fig. 1 that, there be ing sixjdenominations in the product accumula tor, it will accommodate in one operation the product obtained by multiplying a three-denomi national-order binary number by a three-de It is seen, therefore, that in the binary system the entry or data into the product accumulator nominational-order binary number. need be made only once ior each denominational order or the multiplier and that. in substance, the multiplication of binary numbers is the same by successive addition as it is by partial products. type which has an internal voltage drop, when conducting, of about 16 volts. The cathodes are indicated conventionally as being heated, and each is grounded for operating potential through ‘ The product accumulator arcslstancelikercsistance l2. Atypicalsetol The gaseous triode electron tubes are or the circuit values will be given the circuit elements. The product accumulator (Fig. 1) as disclosed the 12, for example, being 15,000 ohms. comprises six denominational orders. Each of Theanodesoreachoithetubesaresuppliedwith thedenominations is represented by two gaseous 25 positive potential from a ‘lb-volt source ll. con triode electron tubes, one tube representing "0” trolled by a switch II, which energizes a supply and the other tube representing “1." The tubes conductor is common to all the tubes in the ac; of a denomination are coupled in such a manner cumulator. From said common supply conductor that, when one tube of a pair commences con ll, each pair of tubes constituting a denomina ducting, the other tube or the pair is caused to gg tional order is supplied through abranch con become non-conducting. The pairs or tubes, ductor such as conductor ii through a 3000-ohm each pair or which forms a denomination. are resistor such as resistor ll, whose iunction is for arranged in a series 01' ascending value, so that, a Purpose to be described. Each of the cathodes upon a tube representing "1” becoming non-con is rurther coupled to ground through a capacitor ducting, a change or mode or operation of the like capacitor II, or .001 microtarad, and a series next higher denominational pair is brought about. resistor, like resistor 10 of'2500 ohms,~ the resistor The scheme or data representation in the ac cumulator will be described. The denominations will be designated 2°, 21, 2', 2!, 24, and 2', so that their decimal equivalents may be easily followed. The tubes are represented by circles. The "1” tube in the denomination 24 represented as con ducting as an example, by being blackened, rep resents an accumulation oi “10000” in the binary system or "16” (2') in the decimal system. ll being introduced ior prevention oi.’ oscillatory phenomena. Each grid is biased from a negative source or potential 20 through a renstor like resistor Ii 01' 120,000 ohms, a point like point 2!, a resistor like resistor 23 of 500,000 ohms, a point like point :0, and a resistor like resistor 25 or 50,000 oh'ms. Points like point 22 are also grounded through a resistor like resistor 20 oi’ 50,000 ohms. This gives each grid, normally, a controlling bias oi’ about 12 volts over the critical Potential. The zero condition 01 the accumulator is evi denced only when all the "0” tubes are conduct ing, which event is brought about by a special control. Each denominational pair of tubes in the prod uct accumulator is provided with input means by which actuating electric impulses are impressed on the pair, such impulses originating by the dif i'erential action or multipiier-multiplicand units or by reason of the "1" tube of the next lower denominational order becoming non-conducting. Each impulse represents a unit or data and causes ‘ a change in the mode of operation or the electron tube pair upon which it is impressed. The orders or the accumulator have data en tered therein in sequence the entry 01’ the multi plicsnd as multiplied by one digit of the multi plier being made denomination by denomination with the highest of the concerned or connect the grid oi’ an asso ciated "0" tube to ground, so as to ground the control grids oi‘ all the zero tubes simultaneously to cause the product accumulator to represent zero by causing all the zero digit tubes'to become conducting. ' ' Assuming the product accumulator in more con dition, the method of counting data therein will be described ?rst by supposing a positive potential impulsetobeintroducedthroughtheiitinputter mlnal 20, said impulse being or such potential that, when it is impressed through capacitor 00, or 10 micro-microierads, through point It and resistor it onto the grid of the "1” digit tube or the 2" denominational order, it will cause said digit tube to lire and become conducting. The anode oi’ said tube, due to the roaster i1,"will thereupon drop in potential, as the temporary grounding eiiect oi’ capacitor i0 holds the ‘anode at that potential, such anode potential being tem ders oi’ the accumulator. Thus, it the 70 porarily teiy 16 volts above the ground. multipllcand "111’ were being multiplied by the Atthesame timasuchsnode dropinpotential particular digit "1” representing the denomina iscarriedbyconrluetorittotheanodeortuhs ii, tion 2’, the iirst entry would be made into the 2‘ which is in-a conducting condition andwlmse denominational order of the accumulator, the sec cathode is maintained at a poli?ve ond entry into the 2‘ denominational order, and potential or m volts, determined ‘ 9,404,697 5 . byresistorl,of15,000ohms,hythedischargeof the multiplier. There are three input control conductors from the multiplicand unit to the de nominational distributor, said conductors ending in terminals ill, II, and 0, representing. respec tively, the 2', 21. and 2° denominational orders of the multiplicand unit. Thusthesingleimpulseiseountedinthe?'order These conductors convey certain potentials to of the product accumulator by leaving the "1" the grids of nine gaseous triode electron tubes. tube in a conducting condition. each being rendered conducting under control oi‘ Upon the introduction of. the second positive impulse through the 2° terminal 2!, the “0” tube 10 associated portions of the multiplier and multi plicand units and thereafter having a self-ex will be ?red and become conducting, whereupon tinguishing action. The combined in?uence of the "1” tube will be extinguished, its grid resum a potential rise in a conductor from the multi ing control. The rise in the potential 0! the the capacitor 8!, so that the anode of the tube Ii temporarily becomes more negative than the cathode, allowing the grid to resume control, whereupon the tube ii becomes extinguished. cathode of tube Ii, as it ?res and becomes con plier unit and a potential rise in a conductor of ducting, is impressed on conductor 32, through 15 the multiplicand unit causes the ?ring or a par point 33, and through capacitors 34 and 15. causing the "1" tube of the 21 denominational order oi‘ the accumulator to tire and become con ducting, thereby causing the zero tube of the same order to become extinguished. No matter 20 which tube of the succeeding order is conduct ticular one of the nine self-extinguishing tubes of the denominational distributor, creating a po tential impulse which is routed to the proper de nominaticnal order of the product accumulator to actuate it. The three input conductors of the multiplier combine with the three input con ductors of the multiplicand to give nine possible results, each of which is represented by one of the nine tubes of the distributor. A typical prob as capacitors N and 35, it will always cause the non-conducting tube to ?re and the conducting 25 lem will give an understanding oi’ the function 01‘ the distributor. For example, multiply in the tube to become extinguished. The accumulator, binary system "111" by "111." This problem will after the supposed introduction of two impulses identify the function of each of the tubes in the through terminal 29, now shows an accumulation denominational distributor, as it provides a digit of two units of data, or, expressed otherwise, data representing 21. Data introduced over terminal 30 in every order of every stage of the multiplica tion. As has been said, the highest digit of the 30 represents, for each impulse, unit data of 21, multiplier is ?rst used, and therefore the problem as such an impulse introduced over terminal It may be expressed in this manner: will actuate tubes 11 and III to change their mode oi’ operation from what it then is, and to cause 2‘ 21 2' 2! 2| 2" (Denominational order) a transfer of data to actuate the succeeding de 35 X l l l (multiplicand) -2'+2l+2' nominational order if such change in the mode l l l (multiplier) -2'+2\+2' of operation of the pair results in the zero tube 111 ("m me)=2‘+2‘+3' ing, because the interdenominational transfer im pulse is impressed through both capacitors, such becoming conducting. In the same manner, a single impulse over the terminal Iii will introduce 11 l 1 l 1 (second stage; -2l+21--2l (third stage viii-flu” in the accumulator a unit of data in the value 40 It is seen that. in the ?rst stage of the multi of 2", an impulse on terminal ill will introduce plication. the highest order multiplier digit is em into the 23 denominational order a unit of data ployed, which is, in the denominational distribu equal to 21‘ for each impulse, and an impulse on tor, represented by the multiplier terminal Ill terminal ll will introduce data equal in value to 2‘ for each impulse. The total capacity of the 45 (Figs. 2 and 3). This terminal is connected to the grids of the gaseous triodes ii, 52, and 53, disclosed accumulator as noted in the binary sys whose cathodes are respectively connected to the tem is "111111." which is "63” as noted in the decimal system. Since the maximum multipli cation accomplished by the structure disclosed is "ill" by "111" in the binary system. which gives product accumulator terminals 89, 40, and ll, leading to the product accumulator banks (Fig. 1) representing 2’, 23, and 24. Referring to the ?rst a product or "ll000l” in the binary system (49 in the decimal system), it is seen that the said ac cumulator is ample to take care of any problem that can be set up in the three place multiplier and the three place multiplicand units. The in vention as disclosed permits the number of de nominational orders to be increased inde?nitely to accommodate more denominations for carry over data or to accommodate a larger product. The terminals 29, 88, I9, 40, and ll are con nected to the denominational distributor or the generated impulses, as will be described. No in put terminal is furnished for the 2B denomination of the accumulator, as that denomination receives data only by denominational transfer. The denominational distributor stage or the multiplication, it is seen that a unit of data is to be entered into each of the last The denominational distributor (Fig. 2) relays and distributes impulses produced under joint named denominational orders of the accumulator. By impressing a positive potential on terminal 60 (Fig, 2) su?icient to relieve the bias on the grids of tubes ii, 52, and It to a point just short of ?ring, each of the said tubes Ii, 52, and I! is primed to be responsive by ?ring. If the grid of any one of the primed tubes is given a positive potential impulse by the multiplicand unit, through associated respective terminals 80, II, and 82. su?icient to overcome the relieved bias, such tube will ?re and become conducting. Such multiplicand impulses are adjusted so as to be insumcient to ?re tubes or the denominational distributor which are not relieved of the full bias potential. The cathode of a ?red tube will rise in potential, due to the resistance in the cathode supply circuit, delivering a positive potential im control of the multiplier-multiplicand units to 70 pulse to the associated one of the terminals It. 40, and ii actuating the corresponding bank of the product accumulator to actuate it. There are the product accumulator. The cathode of the three input control conductors from the multiplier tube Ii (also connected to the cathodes of tubes unit to the denominational distributor, ending in BI and it) is connected to ground through re terminals 50, s2, and I3, representing, respec tively, the 2’, 21, and 2° denominational orders of 75 sistor M of 50.000 ohms by means of conductors . ‘ 7 _ II and 00. The cathoderesistor ll is.common totubesll andlhthe'cathodeoithetubell beingconnectedthereto conductor II. The cathode. resistor‘ is is con nected alone to tube ‘It. , "‘e theorize negative multiplierlot tllllicondterminals grid. is under: which a positive potential immusejin sequence, begin- 10 accession-ma measurements we hositii'ethan 10 volts 'negativelwith to with terminal 00 andending withterminal . thods, by vfrom the multiplicand 02, for each stageoi the multiplication. In prob causing such primed tubes to _» lems in which there isno multiplying dish in a " such as resistors 00 and 00 (Fig. 2) given denomination, no impube" ‘i'onthat denom 500.000 ohms, respective ination‘ reaches the distributor. 00; are or ly. Resistors; ‘such as resistor 00 are oi’ 350.000 »~: e; =1 ~ ': 2°,is coupledby conductor 00 to the mlrldsoftubes II, 00, and‘ I! each through a ‘ A switch lli‘isprovided to complete the anode capacitor like capacitor-0| of 10 micro-microiar Suppl! , j toalltheselr-extinguishingtubes ads. 'In the same manner, the grids of the tubes 02, II, and I‘! are coupled, each through a capac 20 or the denominational distributor unit. 7 ‘ a The multiplier unit a . itor, to the common conductor ,‘lloonnected to the terminal 0i representing the 21 denomina "I'he multiphérlili‘lg. 3) includes four gaseous tional order of the multipllcand. and, in a like triodes, three oi them, I00, IN, and I02, ‘repre manner, each of the tubes II, ‘II, and ‘i2 is cou sending the denominational orders 2=, 21, and 20 of pled, through a capacitor, to a conductor ‘I0 con? 25 the multiplier, the iourth tube, I00. being a “stop” neeted to the terminal 0! representing the 2° de tube. T‘Thetubes' ‘I00 to I00 are caused to be nomlnational order oi the multiplicand. in sequence, the ?rst of said tubes, tube In the ?rst stage oi the multiplication, the ?rst _ operated mt ‘ tired by momentarily closing a switch tube or the denominational distributor tubes'to I“, -‘-which grounds the grid. The remaining become conducting (for the supposed problem)‘ is 30 tubesili, i0l,'and 100 are calmed to become con the tube ll, followed in order by tubes 02 and Ii. ducting in sequence in response to positive po The reason for this order is that in the ?rst stage the tubes Ii, 02, and II are relieved of their bias ‘and the terminals 00, II, and 02 intl'mtorder are given the necessary positive potential ?ring im 35 pulseinsequence. The?ringoleachoithe tential impulse signals received through termi nal ‘III, which impulses are received from the militlpliound unit (Fig. 4),‘ as will be described. The anodes oi' the tubes of the multiplier are tubes 02, 03, and ii produces an impulse, the ‘Supplied, through theterminal ill, under control ?rst impulse being impressed on the terminal 4i, ‘ the second on the terminal 00, and the third on through a resistor I00 0! 3,000 ohms and a com the terminal 09. 0! a switch ill, with '75 volts positive potential, mon conductor» I00. ' ' The cathodes of cache: the tubes I00, ml, and After one of the tubes 01' the denominational ' iii! are grounded through a 15,000-obm resistor, distributor has ?red and become conducting, it is ‘like _ _ resistor i in, in parallel‘ with a capacitor oi .002 inlcrofarad, like capacitor iii, in series with a resistor-oi 2,500 ohms,‘ like resistor H2. The ' self-extinguished by reason or the fact that the cathode and anode of each tube are each dynam icallv coupled to ground, which tact, in conjunc grids or each of the tubes Ill, I02, and I00 are tion with a resistance and capacitance in parallel givennegative bias through the resultant sheet or, connection to terminal H3 or 150 volts nega in the cathode supply, and the distributed induc tance in the anode-cathode circuit, causes an tiveiwith respect to ground, through a point like point ii], through a network 01' resistors, like resistors H0 (or 00, Fig. 2, when key switch 21 ‘is closedLiii, III, H1, H0, and iii oi the val oscillatory rise in cathode potential which over— ‘ shoots the anode potential, extinguishing the tube. For tube 03, for instance, the capacitor ‘II or 100 micro-microiarads, the resistor 00 of 50,000 ohms in the cathode circuit, and the relatively large capacitor 16 coupling the common anode ‘ ues 350,000 ohms, 200,000 ohms, 200,000'ohms, 300,000 ohms,‘500,0001ohms, and 50,000 ohms, re supply to ground constitute such a self-extin 56 spectively. Points like point I50 are connected to the cathode of the preceding tube oi’ the se guishing circuit. The tubes 02 and 04 are both ries at a pointlike point I02, which is grounded served by the resistor 01 and the capacitor DI, the cathodes or both tubes being connected by through a, resistor like resistor I20 of 15,000 ohms. This gives the grids oi’ tubes I01, J02, and!“ a conductor 00. a negative bias or 57 volts with'r'espeet to In the same manner tor tubes 05, 00, and ii, 00 normal their cathodes, which is su?icient to preventjthe whose cathodes are connected by conductors 55 ?ring ot said‘tubes, their cathodes being con and 00, the resistor 04 and the capacitor ‘I0 sup ply the self-extinguishing circuit elements. For a the tubes "and ‘ii, the resistor 11 and the ‘capac ltor ‘II serve the same purpose by reason or the common conductor ‘ll. The tube 12 is served by the resistor 00 and the capacitor Ii. The cath oderesistors and capacitors are thesamei'orall the distributor tubes. The operating potentials are supplied as fol lows: for the anodes, 76 volts positive, and for respect to ground by being connected to" point I“ through a 500,000-o1nn resistor I 00.. ' Basis tor I0‘! is of $530,000 ohms instead of the'3§0‘.000 70 the normal grid bias, 150 volts negative.‘ This ‘ lid-volt negative supply is obtained by connec- ‘ V ' tion to terminal II. which normal potential, bV throughthetermineis Immoral” nected to points like point 102 to give them a negative potential in‘ the normal non-‘conducting condition 01' 8 volts. The grid of tube I00 is given a controlling negative bias oi.’ 150 volts ‘with "I ohms ‘stated ior other corresponding resistors. The closing orany‘one or the keys 2*, 21, ‘oril" (F1:- 3) adjusts‘ themes on the‘grid or the ease oiated tube oi" the multiplier unit Bud, the'ihsso natlonaldistributor, elated tubes of the horizontal making the rowbias of onitheffgrids or the tubes or the denominational ‘distributor 2,404,697 (Fig. 2) as are associated with the depressed closed key. about 59 volts negative. The conse quent potential upon the grids or the multiplier tubes of the next lower denominational order will be about 65 volts negative. As the key switch I04 is momentarily closed, l grounding the grid of the 22 tube I00, the tube I00 tires and becomes conducting, and the termi nal 50 (if key 8| is on the lower contact), connect ed to the cathode of the I00 tube through resistor I88, is given a potential rise of approximately 36 volts. which results in relieving the bias on the grids of the tubes SI, 52, and 53 of the denomina tional distributor (Fig. 2) to approximately 23 volts negative. When an impulse is impressed upon the ter minal I05 (Fig. 3) from the multiplicand unit, it is thereby impressed upon the grids of the 10 cult oi’ tube I03, a greater potential drop is avail able at terminal I2 0. It is seen, therefore, that manually selected ones 01' terminals 50. 02, and 03 are caused to be given an elevation of potential, one after another, under control of the multiplicand unit, the keys like key 04 being selecting keys for set ting up the digits of the multiplier. The multiplicand unit The multiplicand unit (Fig. 4) includes tubes 200, 20I, 202, and 203 of the gaseous triode type, such as the, tubes heretofore considered. ‘Tubes MI, 202, and 203 represent, respectively, 2“, 2‘, and 2’. The tube 200 is an operation recycling control tube. The multiplicand tubes are con nected in a circuit whereby, upon initiation of an operation by ?ring the tube 203, the tubes 202, Mi, and 200 are caused to ?re automatically and tubes IOI, I02, and I03 by means of a common become extinguished in that order in succession. 20 conductor I22 and capacitors, such as capacitor Recycling tube 200, upon ?ring, initiates the com I23 of 10 micro-microfarads. As the grid of tube mencement of another sequential operation oi.’ the IN is connected to point I24, it receives a posi multiplicand unit by giving a positive potential tive elevation of potential while the tube I00 is elevation to the grid of the tube 203. When the in conducting condition, which causes the grid of terminal I26 (Figs. 3 and 4) receives the nega tube IOI to be relieved 0r primed so as to be more 25 tive potential, due to the ?ring of the “stop" tube susceptible to filing than the tube I02 or I03, and of the multiplier, as has been explained, the re consequently the potential impulse impressed on cycling impulse of the tube 200 is blocked and the recycling of the sequential operation of the tubes of the multiplicand ceases. primed tubes, and ?res tube IOI, whose grid is 30 Terminal 205 is the source of a 75-volt posi the terminal I05 is made of a value which dis criminates between the primed and the un connected to the cathode of an already conduct tive anode supply potential which is impressed ing tube. Therefore, when tube I00 is conducting, on a. common conductor 205 when switch 201 is only tube IOI will ?re in response to an impulse closed. A 3,000-ohm resistor 200 is included in from the multiplicand unit. When tube IOI ?res, the portion of said anode supply conductor serv its cathode capacitor I25 of .002 microfarad will ing the tubes 200, "I, 202, and 203. Each of begin to charge, and, due to the common 3,000 the cathodes of said tubes 200 to 203 inclusive is ohm resistor I08 in the anode potential supply grounded through a 15,000-ohm resistor, such as line, a sudden drop in potential in the conductor resistor 209, in parallel with a capacitor and re I05 occurs, with a consequent drop in the anode sistor in series, like capacitor 2I0 of .002 micro potential of the tube I00, which previous to that farad and like resistor 2“ of 2.500 ohms. Each time has been within about 16 volts of the po of the grids, except as will be explained for tube tential of its cathode. Such sudden drop in the 203, receives its biasing potential by being con potential of the anode of tube I00 thereby ex nected through a resistor oi’ 500.000 ohms, like tinguishes it, as its cathode potential is tempo 45 resistor 2I2, a point, like point 2I3, a point, like rarily maintained by the charge on capacitor I I I. point 282, and a resistor of 150.000 ohms, like re This extinguishing of one tube upon the ?ring sistor 2I5, to a negative l50-volt supply conduc of a. second tube by causing its anode potential tor 2I'I. Points like point 2I3 are grounded to become less than the cathode potential has through ‘a capacitor of 250 micro-microfarads, been explained before in connection with the such as capacitor 222. Each cathode is connect product accumulator. It is seen that tubes IOI, ed to a point like point 2I5 through a resistor I02, and I03 are caused to be ?red step by step like resistor 2I0 of ‘75,000 ohms. Departing from in sequence in response to the positive potential the repeating pattern of the circuit elements of impulses impressed upon the terminal I05 by the the multiplicand unit, the resistor H9 is of multiplicand unit. 150,000 ohms, the resistor 220 is of 50.000 ohms, The ?ring of the tube I03 is only to provide the resistor MI is of 500,000 ohms, and the ca a negative potential at the terminal I20, which pacitor 230, coupled to the source of positive negative potential is brought about by reason of potential, is 50 micro-microfarads. With the the drop of the anode potential of tube I03 values of the circuit elements shown, upon the due to the resistance in its anode supply. Such closing of the start switch 223, which connects (50 negative potential is impressed upon the multi the positive potential conductor 205 through ca plicand unit to stop the recycling operation of pacitor 230 to point 224 leading to the grid of the multiplicand tubes, as will be explained. the tube 203, representing 22, the grid of said When tube I03 ?res, capacitor I21 and resistor tube 203 is caused to become su?iciently positive I28 together provide the circuit function in ex to ?re said tube. and, upon said tube becoming tinguishing any other conducting tube whose conducting, point 225 rises in potential, which anode is given its potential by anode conductor I09, just as though the capacitor and resistor were in the cathode supply circuit of tube I03. Therefore capacitor I2‘! is of the same value as capacitor III, and resistor I28 is of the same value as resistor I I0. The resistor in the cathode supply of tube I03 is an oscillation-suppressing resistor of 2,500 ohms corresponding to resistor H2 having the same function for tube I00. By placing most of the resistance in the anode cir potential is impressed through Point 236, P88151101‘ 20L point 202, point 2I3, and resistor 2I2 onto the grid of the tube 202, representing 2', which thereupon ?res and becomes conducting. As tube 202 is becoming fully conducting, capacitor 2I0 is charging, which, by lowering the potential of anode I225 due to the common resistor 208 in an anode supply circuit. lowers the potential of the anodes of tubes "R," 2°. 21, and 2‘, which 2,404,697 I1 drop in potentialoi’ anode more than 15 . E‘:5 l? 5 3'B3 response to the poten rise received at point 238 as tube 201 ?res. as ?res. its cathode rises in poten 03 Q5r In 10 a positive impulse as the tubes 01' the multipli cand?reinsuccession. It is apparent that, as far .15 i the invention is concerned, the a recycling of the multiplicand at the time the "R" tube 200 ?res the third time, the "stop" tube 103 (Fig. 3) is also caused to digit-representing tubes of the multiplicand unit. The tubes 289. 240, and 24!, being self-extinguished by reason of their resistance-capacitance coupling‘to ground, pass on the impulses and are ready for thing on the next cycle of operation or the multiplieand unit. tube 200, due to its ?ring. will not initiate the ?ring of tube 203 and a consequent recycling of the multipiicand. This stops the operation of the muitipiicand unit. itor 222 are timing capacitors, oi’ 50 micro-microfarads delays 30 tial of the grid of tube 203 until the tential arrives over tiplicand keys are closed (Figs. 3 and 4), the key ID‘ of the multiplier (Fig. 3) is closed, and ?nal ly the start key 223 (Fig. 4) is closed. Under 40 mulator accordingr to the following schedule: In tter- In at ter nais to m unis to distributor product to terminals impulse as the associated relay Tubes 23!, 240, and 2" are self The values for been presented in the circuit elements that have 250,000 ohms to the l50-volt negative supply con~ ductor 217. Points like point 252 are connected through a resistor like resistor 2“ to a terminal like terminal 255, which may be connected by a key switch like switch 256 to ground. These switches, when closed, ground the ternninal 285 and reduce the bias on the grid of the associated relay tube. example, the closing of switch 75 l3 - , candtubenot selectedisnotconveyedto thede insequenceinresponsetoeachotre nominational distribute . ceived electric impulses: a second plurality of electron tubes representing the digits of a mul Thereiore, no matter what the size of the multiplier or the multipli cand, the time consumed in one multiplying op. eration is the same. tiplicand so connected in a circuit that they are automatically rendered conductive in sequence Instead of the method of selecting the digits of the multiplier and the multiplicand by key switches, wherein the control is located between the multiplier or the multiplicand and the de and connected to said nrst group of tubes so that at the end ot a cycle of operation 0! the multiplicand tubes a potential impulse is im pressed upon the multiplier tubes; and means nominational distributing unit, the. same results 10 associated with each multiplicand tube which means is given an electric potential impulse when could be gotten by bridging the connections be the associated tube becomes conductive. tween the multiplier tubes or the multiplicand 5. In combination, a plurality oi gaseous elec tubes so as to cut out any particular tube not tron tubes, each representing a digit oi’ a multi wanted in the sequence oi’ operation, or stopping 15 plier and connected in a circuit so they are the operation of selected tubes in any manner. operable one at a time in sequence, in response A table of binary-decimal equivalents is given to each of commonly received electric impulses: in Fig. 5 for convenience. means to render the ?rst tube of the sequence While the form of the invention herein shown operable; a second plurality oi! gaseous electron and described is admirably adapted to iul?ll the objects primarily stated. it is to be understood 20 tubes, each representing a digit of a multipli cand, so connected in a circuit that they are that it is not intended to con?ne the invention automatically rendered operable in sequence and to the one form or embodiment herein disclosed, connected to said first group of tubes so that for it is susceptible oi’ embodiment in various at the end of a cycle oi operation of the multi terms all coming within the scope oi’ the claims 25 plicand tubes a potential impulse is impressed which follow. commonly upon the multiplier tubes; means to What is claimed is: start the sequential operation of the multipli 1. In combination a plurality of electron tubes cand tubes; an output circuit for each tube of each representing a denomination of a multi the multiplier tubes, each of which output cir plier so connected in a circuit that they are operable one at a time in sequence in response 80 cuits is given a rise in potential as the asso to each of commonly received electric impulses; and a second plurality of electron tubes arranged in a chain, each plurality representing a de ciated tubes become conducting; and an output circuit for each 01' the multiplicand tubes. each of which circuits is given a rise in potential as the associated multiplicand tube becomes con nomination of a multiplicand so connected in a circuit that conduction in one tube renders the 35 ducting. 6. In combination, a plurality of gaseous elec next tube in the chain conducting, said group tron tubes, each representing a digit oi’ a multi being connected to said ?rst group of tubes so plier and so connected in a circuit that they that at the ‘end of a complete sequential cycle are operable one at a time in sequence, in re of operation of the multiplicand tubes a poten tial impulse is impressed upon the multiplier 40 sponse to each of commonly received electric tubes to operate them a step in the sequence, 2. In combination a plurality oi’ gaseous elec tron tubes, each representing a denomination of a multiplier, so connected in a circuit that they impulses; a second plurality of gaseous electron tubes, each representing a digit of a multiplicand and so connected in a circuit that they are auto matically rendered conductive in sequence, and connected to said ?rst group of tubes so that at are operable one at a time in sequence. in re the end of a cycle of operation 01' the multipli sponse to each oi’ commonly received electric cand tubes a potential impulse is impressed com impulses; and a second plurality oi gaseous monly upon the multiplier tubes; an output cir electron tubes arranged in a chain, each plu cuit for each or the multiplier tubes, each oi rality representing a denomination of a multi plicand, so connected in a circuit that conduc 60 which circuits is given a rise in potential as the associated tube becomes conducting; an output tion in one tube renders the next tube in the circuit for each of the multiplicand tubes. each chain conducting, said group being connected of which circuits is given a rise in potential as to said ?rst group of tubes so that at the end of the associated tube becomes conducting; and a a complete sequential cycle of operation of the means associated with each output circuit to multiplicand tubes, a potential impulse is im pressed commonly upon the multiplier tubes to connect said circuit with said tube and discon nect said circuit from said tube as selectively operate them a step in the sequence. determined. 3. In combination a plurality of electron tubes 7. A first plurality of electron tubes each tube each representing a digit of a multiplier so con representing a digit 01' a multiplier; a second plu nected in a circuit that they are operable one at rality of tubes each tube representing a digit of a time in sequence in response to each of com a multiplicand; means supplying operating en monly received electric impulses; a second plu ergy to said tubes; means connecting the mul rality of electron tubes each representing a digit tiplicand tubes to cause said multiplicand tubes of a multiplicand so connected in a circuit that to automatically become conducting one at a they are automatically rendered conductive in time in sequence; means connecting the mul sequence and connected to said ?rst group of tiplier tubes to cause the multiplier tubes to be tubes so that at the end of a cycle oi’ operation come conducting one at a time in sequence; means of the multiplicand tubes a Potential impulse is coupling the ?rst and second groups of tubes so impressed upon the multiplier tubes; and an output circuit for each tube of the multiplier 70 that each step oi’ operation of the ?rst group is caused by the completion of a cycle of sequential which circuit is given a rise in potential as the operation of said second group; output means for associated tube becomes conducting. each of said tubes, said output means being given 4. In combination a, plurality of electron tubes a rise in potential each time the associated tube representing digits of a multiplier so connected in a circuit that they are operable one at a time 75 becomes conducting; selective means to determine 8,404,897 15 a whether any of said output menu should be given said rise in potential or not as the associated tube becomesccnductlng; and a plurality or tubes connected in] groups. each group representing an output meansol the multiplier tubes by which the group is controlledand connectedin other groups each oi‘ which'represents the output means of one of the multiplicanditubesr and connected in third groupings, each ot'whioh represents the Joint con they are made to become conducting one at a time in sequence, each step of the sequential operation being caused through said couplings by the re cycling means or the multipllcand unit on the completion of a cycle of said multlplicand unit; means under control or the multiplier unit for causing the multiplicand unit recycling means to cease its operation at the conclusion oi’ one se trol of adigitrepr'esenting tube of the multiplier 10 quential cycle of operation or the multiplier unit; an output conductor for each tube oi’ the mul and aldisitreprcsenting tube of the multlplicand tipller unit which output conductor is connected whose productis represented in the same denomi nation. " I to an electrode of the associated tubes so as to receive an electric potential rise as such tube is _ 8. In combinationi-a' plurality oi’ electron tubes operated; an output conductor for each tube of i representing denominations , of a multiplier so 15 the multiplicand unit so connected to an electrode ‘connected in a circuit that they are operable one 01 the associated tube that such tube is given an electric potential rise as the associated tube is ‘operated; controls whereby to start the operation ity of electron tubes representing the denomina tions 01' a multipli'cand so connected in a circuit 20 of the multiplier units and the multiplicand units: a plurality of responsive means. each of which is that they are automatically rendered conducting at a time in sequence; iii-response to each of com monly received electric impulses; a second plural- ' associated with an output conductor of the mul- ' in sequence, and connected to said ?rst group of tubes, so that at the end or a cycle 01' operation of the multiplicand tubes a‘, potential impulse is impressed upon the multiplier tubes: a plurality of means, each representative of a product of a’ tipller unit and one of the output conductors of the multiplicand unit so as to be responsive to given an electric potential change when the as sociated conductors receive their potential rises at the same time; and a plurality oi’ conductors multiplicand digit as multiplied by a multiplier‘ d'git, said means including a plurality of electron ‘ each associated with one or more or the respon-v sive means. which conductors are given an elec tubes equal in number to the number-oi’ denomina tions in the multiplier times the number of de 30 tric potential change nearly one of the respon sive means with which they are associated re nominations in the multiplicand; and connec sponds. , tions between the product representing tubes, a 11. In combination, a multiplier unit, includ source of electric energy, and the multiplier and ing an electron tube for each 01' a plurality of multiplicand tubes. whereby any one of said prod uct tubes is renderedconductlng by reason of the 36 denominations based on the binary system of numerical notation; a multiplicand unit includ multiplicand tube and multiplier tube whose prod ing an electron tube for each of a plurality of not it represents, being simultaneously in a con— ducting condition. - denominations based on the binary system of ' numerical notation, and a cycling means; con 9. In combination, a multiplier unit, including an electron tube for each of a plurality of denom inations, based on the binary system of numerical notation; a multipllcand unit, including an elec tron tube for each oi'a plurality of denomina tions, based upon the binary system of numerical nections between the tubes 01 the multipllcand 40 unit whereby the tubes are caused to become con ducting one at a time in sequence, said sequen tial operation being automatically repeated by the recycling means; couplings between the multi plier unit and the multlplicand unit; connections notation, and arecycling means; connections be 45 betweenthe tubes of the multiplier unit whereby tween the tubes of the multiplicand unit where they are made to become conducting one at a by the tubes‘ are caused to become conducting one - time in sequence, each step of the sequential at a time in ‘sequence automatically, said sequen operation being caused through said couplings by tial' operation being automatically repeated by the recycling means upon completion of the se the recycling means; couplings between ‘the mul 50 quential cycle of operation oi’ the multiplicand tiplier' unit and the multiplicandunit; connec unit ; means under control oi’ the multiplier unit ’ tions between the tubes 0! the multiplier where for causing the multipllcand unit to cease its by they are made‘to become conducting ‘one at a repeat operation at the conclusion of‘one se time in sequence, each step of ‘the sequential quential cycle oi’ operation oi’ the multiplier unit: operation being caused through said couplings by controls whereby to start the operation of the the completion or. asequential cycle of the mul multiplier unit and the multlplicand unit; an tiplicand operation; and means under control of output conductor for each tube of the multiplier the multiplier unit‘ for causing the multiplicand unit recycling'means' to cease its repcatropera-j V tions at the’. conclusion "or one sequentialcycle of operational the'multiplier unit. r " unit, which output conductor is connected to an electrode of the associated tube so as to receive a change in‘electrlc potential as each tube is operated; an output conductor for each tube 01" 10. In combinatiomna multiplier unitinclud the multiplicand unit so connected to an elec ing anelectrohiiibc'wler each of a plurality of trode oi’ the associated tube that each con denominationsxbased on the‘ binary system of ductor is given a change in electric potential as numerical notation: a multiplicand unit includ 65 the associated tube is operated: a plurality of ing an electron tube for each of a plurality‘oi 1, denominations ‘based upon ‘the binary system of ‘ means, each of which is associated with a con ductor oi’ the multiplier unit and one or the con- ' numerical notation, and a recycling means: con ductors of the multiplicand unit so as to respond nections between the, tubes of the multipllcand when the associated conductors receive their po unit whereby the tubes are caused to become con 70 tential change at the same tim ; a plurality of ducting one at a tlmein sequence, said sequential ' operation being automatically repeatedby the conductors each‘ associated with ‘one or more of the responsive means and each having a desig recycling means; couplings between the multiplier nated numerical value. which conductors are given unit and the multipllcand unit; connections be an electric potential impulse as any ‘one oi‘ the tween the tubes 01' the multiplier unit‘ whereby 75 responsive means with which they are associated 9,404,697 17 commonly impressed upon all the tubes; 9. second ; and an accumulator of data having plurality of electron tubes divided into groups, denominational orders based upon the binary sys each group being associated with one of the tem of numerical notation. which is actuated by tubes at the iirst named plurality; means common the changes of potential 0! the conductors asso ciated with the responsive means, said conductors 6 to the tubes of a group normally rendering the tubes inoperative; and connections between a and the denominational orders of the accumu tube oi the first plurality and associated group lator being so connected that the accumulator is whereby when said tube of the ?rst plurality actuated to have data entered therein correspond i; operated it prepares for operation all the tubes ing to the product represented by multiplying the 0! the group with which it is associated. value oi’ the multiplicand tubes by the value of 14. In combination, a product accumulator the multiplier tubes. actuable by electric impulses; a multiplier unit 12. In combination, a multiplier unit, includ including a plurality oi electron discharge tubes. ing an electron tube for each of a plurality oi.’ each of said tubes representing a denomination denominations based on the binary system or numerical notation; a multiplicand unit includ 15 in the binary system oi numerical notation; a. multiplicand unit including a plurality oi elec ing an electron tube for each of a plurality of tron discharge tubes, each oi said tubes repre denominations based on the binary system oi‘ senting a denomination in the binary system of numerical notation and a recycling means; con numerical notation; a plurality oi.’ means for en neetions between the tubes 01 the multiplicand unit whereby the tubes are caused to become con 20 tering data into the several denominations of the accumulator; a plurality of electron tubes, each ducting one at a time in sequence. said sequential of which produces an electric impulse when ac operation being automatically repeated by the tuated by operation 0! a tube of the multiplier recycling means; couplings between the multiplier unit in conjunction with the operation of a tube unit and the multiplicand unit; connections be tween the tubes of the multiplier unit whereby 25 0! the multiplicand unit at the same time; and they are made to become conducting one at a means connecting one or more oi the electric im— time in sequence, each step of the sequential oper ation being caused through the couplings by the recycling means upon completion of the se pulse producing tubes to an associated one of the data entering means so that when one of the for causing the multiplicand unit to cease its repeat operation at the conclusion of one se actuated, data is entered into the proper denom ination of the accumulator to represent the tubes associated with the data entering means is caused to produce an impulse by reason of the quential cycle oi’ operation of the multiplicand 30 associated multiplier and multiplicand tubes being unit; means under control 01' the multiplier unit quential cycle or operation of the multiplier unit; controls whereby to start the operation of the multiplier unit and the multiplicand unit; an out put conductor for each tube of the multiplier product of the value of said multiplicand tube 35 asbemultiplied by the value of said multiplier tu . 15. In combination, an accumulator of data having denominational orders based on the unit, which output conductor is connected to an binary numerical notation; a plurality oi elec electrode of the associated tube so as to receive a change in electric potential as each tube is 40 tron tubes equal in number to the number of denominations in a multiplier as multiplied by operated: an putput conductor for each tube of the number or denominations in a, multiplicand; the multiplicand unit so connected to an elec a multiplier unit based upon the binary system of trode oi.’ the associated tube that each conductor numerical notation, said unit including a gaseous is given a change in electric potential as the associa tube is operated; a plurality of means, 45 electron tube for each denomination oi the mul tiplier, including means connecting the tubes 50 each oikwhich is associated with a conductor of they may be caused to operate in sequence in the multiplier unit and one of the conductors of response to commonly received electric im the multiplicand unit so as to respond when the pulses, including an output conductor for each associated conductors receive their potential change at the same time; a plurality of con 50 tube having impressed thereon electric potential changes as the associated tube is rendered con ductors each associated with one or more of the ducting, said output conductcrs having selecting responsive means and each having a designated means included therein to connect or disconnect numerical value, which conductors are given an the conductor with or from the associated tube; electric potential impulse as any one oi the a multiplicand unit, including a plurality of elec responsive means with which they are associated 55 tron discharge tubes connected so they are op responds; an accumulator of data having de erated one at a time in sequence automatically, , nominational orders based upon the binary sys said multiplicand unit including an output con tem of numerical notation, which is actuated by ductor for each tube, which is impressed with the changes of potential of the conductors asso an electric potential change as the associated ciated with the responsive means, said conductors 60 tube is operated, including selective means where and the denominational orders oi the accumulator by each output conductor may be connected with being so connected that the accumulator is actu or disconnected from said associated multipli ated to have data entered therein corresponding cand tube so as to determine whether a potential to the product represented by multiplying the value of the multiplicand tubes by the value of 05 change shall be produced on said conductor, means to cause the sequence of operation to be the multiplier tubes; and manipulative means to repeated, said means also causing a. step of op select which 01' the multiplicand tubes and which eration or the multiplier unit, and means con of the multiplier tubes when operative shall im trolled by completion of operation of the multi press a potential change upon the associated plier unit Ior disabling the repeating means of 70 responsive means. the multiplicand unit; and means for operating 13. In combination a plurality of electron tubes the tubes of the ?rst mentioned ‘plurality of tubes each representing a digit: connections between under joint control oi the combined output means the tubes whereby they may be made conducting of the multiplier unit and the multiplicand unit one at a time in sequence, each step oi the se so as to operate a. selected one of said tubes 75 quence being in response to an electric impulse ‘ m,_________ H__,,_ 2,404,001 19 ’ 20 whsnacsstainonsoithemultiplicsndunitoutlatorotnumerlcaldatabasedonthebinarysys putconduetorsrccsivesapotentialchango at temcd'notatiomactuatedbyelectricimpulsesin thssamstimsaccrtainoneotthsoutputoom pulsetroduced intotheseveraldenominationsznn means tor actuating the accu-, tialchangatheoperatedtubeoitheiilstplu5 mulatonincludingapluraiityorelectrcntubes rality having an output conductor leading to the equal in number to the number of denomina doctors of the multiplier lmit receives a poten- pmpcr denomination oi’ the accumulator-so as to enter therein the product data represented by multiplying the value or the lssociated multipii- tions or a multiplier times the number or de nominations of a multiplicand, each oi’ said tubes being supplied with operating energy and con candtuhsbythevalueor themulti- 10 nectedsoastosupplyanimpulsetotheproper plier tube. denomination oi’ the accumulator when acted up 16. In combination, an accumulator ot numeron coniointiy by a digit-representing device or ical data based on the binary system oi’ numerthe multiplier and a digit-representing device icai notation, including denominational maps of of the multiplies-ml whose product such tube rep eiectron tubes. the tubes representing the digits 15 resents; an electronic multiplier unit based on in the denomination, said accumulator being acthe binary system oi’ numerical notation, includ tuated by electric potential chances introduced ing a tube for each denominational order oi’ the thereto by d orders or between demultiplier; a multiplicand unit based on the bi orders; data introducing means nary system or numerical notation, there being 0! a plurality of electrical conductors 20 an electron tube for each denomination of the each representing a denomination of the accumultiplicand; connections between the multi mul?tor to the product 0! a dlsit plier tubes and the impulse-producing tubes: or a multidenominatiimal number muml?ler by connections between the multiplicand tubes and a disit of a multidenominatlonei 1mm multlthe impulse-producing tubes; and connections pncand; and means to apply a Potential verle- 25 between the multiplier tubes and the multipli tion to any such conductor by hsvins connected cand tubes whereby each tube or the multiplier thereto an electrode or a thyratron connected in unit is rendered conducting in conjunction with a 8811 ?ttimtins (?rm-111i 119M118 9- each tube in the multiplioand unit to control the demoted numerical value or the dcnomina- corresponding tube of the impulse-producer. tion of the accumulator represented by the con- 30 20. In combination, a denominational accu ducli?r: 8nd de?ominl?‘m?l ‘1181*’ representing mulator of numerical data based on the binary multil?lcr selecting means and denominational system of notation, actuated by electric impulses 6181b MIG-891M118 multipliclmd Selecting means introduced into the denominations; impulse pro to comm] 851d matron! selectively whereby ducing means for actuating the accumulator, in “1086 mum "Prawn-n8 the Product 0! the 35 eluding a plurality of electron tubes equal in selected multiplier number by 8 Selected mumnurnber to the number of denominations of a 91mm number are caused to bemme active in multiplier times the number of denominations oi‘ denomlnaliional Beqlleme. t1m8 giving. the input a multiplicand, each oi‘ said tubes being sup conductors a potential change to enter product plied with operating energy and connected so dam into the Wawr40 as to supply an impulse to the proper denomina 17- In 60111793181301!’ 8» plurality of electmmc tion of the accumulator when acted upon con relays having 119818111111“ Product Values. 831d 1'9jointly by a digit-representing device of the mul 1535 being selectively mntmned Jointly by 3' mm‘ tlplier and a digit-representing device of the HD1181‘ unit and a mumpnmd “mt, each unit multlplicand. whose product such tube repre bemB divided mm denmnma?ons- each may be‘ 45 sents; an electronic multiplier unit, based on the 1115 ‘Emma-ted with one denomination in each binary system 01’ numerical notation, including a “mt; means to issue mammal Variations n'om tube for each denominational order of the mul the multiplicmd "mt demmmamn by denomj‘ tiplier; a multiplicand unit based on the binary nation and to Impress them upon the associated system of numerical notation, including an elec ones of the relay devices to control them; means 50 "on tube for each denomination of the mump? to issue potential Variation‘? from the multiplier cal-id; connections between the multiplier tubes “mt denc‘mmauon by demmmatmn and impress and the impulse-producing tubes; connections them upon the associated ones Of the relay de‘ between the multiplicand tubes and the impulse vices, said multipiicand unit and multiplier unit producing tubes; connections between the mul Pimmtial variations being timed ‘5° act hint]? at 55 tiplier tubes and the multiplicand tubes where discretc periods to render the associated product by each tube in the multiplier unit is rendered desigmmfodrglczys e?ec?ve to represent the as‘ conducting in conjunction with each tube in the 5°C a e P multiplicand unit to conjointly affect the cor - 1_8- In 9' multiplying device wherein the mm" responding tube in the impulse-producer; and “mention is performed‘ in stages each under 60 means for selecting which digit tubes of the mul contml M 8' demmmatmn of a multiplier- the tiplier unit and the multiplicand unit shall act combination of a plurality of groups of self-rec°njoln?y_ Setting 816cm" discharge tube “1518, each 21. In combination, a multiplier unit, includ EI‘WP representing a stage °f multiplication and ins a gaseous electron discharge tube for each each tube in the group “150 representing a de' 65 denomination of a. multiplier based on the binary nomination 91' the multiplicandi 9' conductor :01’ system of numerical notation, each of said tubes controlling each Bmup controlled by a multiplier including an anode, a cathode, and a control unit; a multiplicand unit and including a “011' electrode: means supplying operating energy to ductoi‘ for each denomination of the each of said tubes: means for applying a nomal 65nd. which cenducml‘? are coupled Jointly with 70 ly controlling potential on said control grids; the conductors from the multiplier 5° the elecmeans to connect the tubes so they are rendered tron tubes for determining which ‘oi’ the relay conducting one at a time in sequence in response tubes shall become c?nduetive to represent Pmdto electric impulses commonly received by all but not data. the ?rst tube applied to the control grids, the 19. In combination. a denomination! mumu- T6 conductivity oi‘ a preceding tube of the sequence 2,404,897 priming the grid of the succeeding tube of the se in; means connecting the output conductor for each denomination of the multiplier with the quence so as to be responsive to the next impulse; means to cause conduction in the ?rst tube of the sequence; means including a resistance in the sell-extinguishing tubes whose designated prod uct includes that digit of the multiplier as a. fac tor, whereby when said multiplier tube is in a cathode supply circuit for each tube for causing conducting condition, the controlling bias upon the control grids of those corresponding’ sell-ex tinguishing tubes is reduced; means connecting conducting; means connected to said cathodes of the output conductors of the multiplicand unit all but the last tube receiving an electric impulse each time the associated tube is rendered con 10 to those sell-extinguishing tubes whose designat ed product includes that digit as a factor to give ducting; a multiplicand unit, including a plural said tubes an impulse whereby to destroy the con ity of electron discharge tubes. each represent a potential rise in the cathode as a tube becomes trolling bias on any associated tube which has had its potential reduced by connection to a con ing a denomination in the binary system of nu merical notation, each of said tubes including an anode, a cathode and a control grid; means for ducting multiplier tube; a plurality of conduc applying operating energy to the anode-cathode circuits of said tube; means to apply a normally controlling bias to the grid of said tubes to pre vent conduction therein; means connecting the tubes so they are caused to become conducting one at a time in sequence automatically; means to start conduction in the ?rst tube of the se~ quence; means to recycle the multiplicand tubes so they may be caused to automatically repeat their operation in sequence, said recycling means impressing an impulse upon grids of all but the ?rst of the tubes oi the multiplier unit to cause a step of operation therein; means rendered ef iective at the completion of the sequential op eration of the multiplier tubes to render the re cycling means of the multiplicand tubes ineffec tive; means including a resistor in the cathode supply of each tube of the multiplier unit to cause a potential rise in the cathode as the tube becomes conductiim; an output conductor con nected with the cathode of each tube of the mul tors, each‘ representing a denomination of a bi ot the self-ex -nary numerical accumulator, all tinguishing tubes whose value is the value of the conductor being connected thereto and deliver ing thereto an electric impulse upon the dis charge of any of said connected self-extinguish ing tubes; an electronic product accumulator of numerical data based on the binary system of numerical notation, each denomination oi which includes two electron discharge tubes connected 25 for alternate operation so that an electric im pulse impressed commonly thereon will cause the tube of the denomination to become extinguished and the non-conducting tube of the denomination to become conducting; means 30 connecting each conductor from the self-extin tiplicand unit except the last; a plurality of self extinguishing gaseous triode electron discharge tubes, each of said self-extinguishing tubes rep guishing tubes to the corresponding denomina tion tubes of the product accumulator so that when any impulse is received by said conductor it will change the mode of operation of the cor responding denominational tubes; and means in terconnecting the denominations oi the accumu lator whereby when the denomination having had entered therein its full capacity of data re resenting the product oi one of the digits of the 40 ceives another impulse from the associated self extingulshing tubes, the denomination will 're multiplier by one of the digits of the multipli cand, and said number of sell-extinguishing tubes equalling the product of the number of multiplier denominations by the number of mul tiplicand denominations; means normally sup plying a controlling potential bias to said seli extinguishing tubes to‘prevent conduction there turn to zero and in so doing impresses an im pulse on the next higher denomination so as to enter therein a unit of data. ' JOSEPH R. DESCH. ROBERT E. Certi?cate of Correction Patent No. 2,404,697. July 23, 1946. JOSEPH R. .DESCH, ET AL. It is hereby certi?ed that error appears in the printed speci?cation of the above numbered patent requiring correction as follows: Column 16, line 38, claim 11, for the word “cycling” read recycling; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent O?ice. Signed and sealed this 22nd day of October, A. D. 1946. [m] LESLIE FRAZER, First Assistant Uommim‘omr of Patents.