US2236795A - Multiplying mechanism - Google Patents

Description

April 1, 1941. H, FURBER MULTIPLYING MECHANISM Original Filed Oct. 9, 1935 4 Sheets-Sheet 1 A ril '1, 1941;

P H. .1. FURBER ,MYULVTIPLYING macmmsm Original Filed 001;. 9, 1935 4 Sheets- Sheet 2 INVENTOR.

' April 1, 1941. J. FURBER MULTIPLYING MECHANISM 4 Sheets-Sheet 4 INVENTOR. .M

\ Patented Apr. 1,1941

" UNITED ,STATES PATENT OFFICE 2,236,:95. v v I MUL'rrrLmcMEcnams Henry Jewett Furber, Silver Spring, Md.

O in

1937, Serial No. 153,843

. '2 Claims. (Ol. 235-61) This invention relates to improvements in multiplying mechanism randv the present application is av division of my copending application rial No. 44,159, filed October 9, 1935, which is a continuation, in part, of application. Serial. No. 723,595, flied May 2, 1934. v

An objeot of this invention is to provide means for developing a product, whether positive or negative, and automatically to identify the quality of the product so developed.

Another object of this invention is to provide means for multiplying quantities whether whole numbers or decimal "fractions and to provide means for initial upward or downward column application October 9, 1935, Serial No. Divided and this application July 15,

Figure -is a view of the lower face of the disk 40 at the transmitter 40.

Figure 6 is a diagrammatic view from the right of a timing arm 18 shown in Figure 1, with terminals corresponding to multiples, at which'circuits may be closed.

Figure 6a is a diagrammatic view of the timin am It, as shown in Figure 1, with surface partially broken away, illustrating the relative positions of electric terminals coactive with conductors-carried by said arm.

Figure 7 is a perspective view from the right,

. showing the pathway of the arm 18 in closing The numbering and lettering of my cope'nding application Serial No. 44,159, except the serial numbers of the figures, are preserved herein. Suflicient of the mechanism therein disclosed, is reproduced in the present application, to illustrate the operation of multiplication, although not necessarily confined thereto.-

with foregoing and other objects in view, as may appear, the invention now will be described in connection with the accompanying figures, in which details superfluous to multiplication are,

with view to cleamess, in so far as possible suppressed.

Figure 1 .is -a general diagrammatic view of the calculating unit adapted to multiplication.

' Figure 2 isa diagrammatic view of the manual controls at which the factors are established, and

state-control means which selectively conditions the calculating unit for positive or negative com-- putation, according to thesimilarity or dissimilarity in the quality of factors.

Figure 3 is a'diagrammatic view from the right iiii-(cuits between typical complementary conts. i Figure 8 is a diagrammatic view from the right, of members shown in Figure 1, which transmit motion from shaft 53 to the shafts 58 and "a.

Figure 9 is a diagrammatic plan view of the shafts 5', 58a, shown in Figure 8 with members and electrical connections appertinent thereto. a

Figure 10 is a detail view from the left of the g armature 63a shown in Figure 9, with electrical connections.

Figure 11 is a side view from the left of the typical armature 82" shown in Figure 1, operative in restoring an accumulator arm to zero position.

Figure 12 is a diagrammatic view from the left of the armature 89 shown in Figures .1 and 9 cperative in clearing calculating unit. I

- Figure .13 is a diagrammatic view of a typical accumulator arm 6i with contacts which close numeral circuits to recording apparatus.

Figure 14 is a detail view of inking ribbon for identifying positive and negative resultants by different colors, with solenoid to shift position.

Figure 15 is a view of mechanism for effecting column-shift. I

Figure 16 is a viewof-the lower face of disk 40 adapted to six denominational accumulator orders for controlling the amplitude of columnshift. a

Figure 171s a plan view of a typical disk Illa adapted-to six denominational accumulator orders for relaying, in-column-shift, actuating circuits and immobilizing circuits.

Figure 18 is a view of the lower face of the disk 49 with circuits selectively to close circuits to reofthe disk 16 shown in Figure 1, with various,

electric conductors which pass from face to face.

Figure 4 is a diagrammatic view of the disk All wheels disclosed in the abovehlgures are toothed throughout, there being no mutilated gearings. The wires leading from the positive and negative poles of the source ZZ are designated respectively as wires s+ and s-. Cables carrying a plurality of wires are indicated by heavy ments the members BI, GI", BI' (Figure 1) of the accumulator and members 6|, 6|", 6I"', fil

6|? and I'iI" of Figure 15, said members individu- V ally being termed accumulator arms, as shown in Figures 1, 9, 13, 15, the accumulator arms 6|, BI' being concealed by contact benches in Figure 1.

General description In view to simplicity and clearness the demonstrations of multiplication which immediately follow are limited to whole numbers, operations involving fractions being subsequently disclosed in connection with Figures 15, 16, 17 and 18.

The quantities subject to operation, may be transmitted to the calculating unit (Figure 1) by means of electric circuits controlled by manual levers I, I", -I", 2', 2", 2", 'or by equivalent devices (Figure 2). A master switch I is a state control which determines-the nature of the operation which shall be performed. The depression of the push button P.2, (Figure 2) causes motion to be transmitted from an electric motor, M (Figure 1) preferably in constant operation and revolving always in the same direction;

gles of displacement corresponding to quantities selected at the manual controls.

The relays C.II, C.I2 (Figure 1), control the dff, the middle member of which is integral with the sleeve 60". The armature 62' imparts motion to the sleeve 60', in similar manner, through the transmission 61' and the differential gearing d). The differentials df, dJ", are introduced, in order that the accumulator arms 6 I BI" may be responsive, each to quantities origmating in its own corresponding denominational order, while simultaneously absorbing the carryover from orders therebelow.

' Positioning pins 0.9", C.9"', well known to the art, are indicated in Figure 1, their purpose being to correct overdraft, and to block a lateral member of a planetary gearing when the other lateral member be alone in operation. Such po-.

sitioning pins may .be employed where needed.

The orbits of the accumulator arms 6I.', 6|", BI' are each divided into tenunitary steps of 36 corresponding to'the numerals 0-9, (Figdirection of motion transmitted to the accumulator arms SI, SI, SI from the motor M, consistently with the similarity or dissimilarity in quality of the quantities involved.

The wheel 16 (Figures 1, 3) closes and breaks, through conductors which it carries, circuits established .at the master switch I (Figure 2) or Said push-button is introduced, in order that I the calculating unit be brought into operation,

only after all other controls are properly adjusted.

Referring to Figure 1, the motor M connected with the source 22 through the wires s+, 8-, and preferably in constant operation, imparts motion through the shaft 50, wheels 5|, 52, shaft 53, wheels 54, 55, 56, armature 51 and the electric clutch C.5 to the shaft 58, on which are mounted the sleeves 6!), 60", 60", carrying respectively the differentially operated accumulator arms 6|, 6If', 6

Motion is selectively transmitted to the sleeves 60', 60", 60", on which are fixed the accumulator arms 6|, 6|", GI clutches 0.1, 0.1", C.'I"' which are fixed to the shaft 58, and operate respectively on the armature 62, 62", 62'. The sleeves 60', 60", 60"

are carried by the shaft "58. The armature 62" 65" and thence through the differential gearing (Figure 1) by electric ure 1 3). I

Fixed on the motor shaft 50 is the electric clutch C.2 I which, when energized, transmits motion through the armature I4 floating in soli- ,darity with the pinion I5 (Figure 1) on the motor shaft 50, to the wheel 16, fixed on the shaft 11 together with the timing arm 18. The timing arm 18 synchronizes in movement with the accumulator arms 6|, 6|", 6|' moving, for example, through an arc of, 3.6, while an accumulator arm SI, SI", SI' moves through an arc of 36". It is the function of the timing arm. 18 to close circuits, as it advances, which selectively arrest the accumulator arms 5|, SI", SI, at angles of displacement corresponding to. the quantities established at the manual controls shown in Figure 2 as will hereinafter be described. i

The manual control includes a series of 'levers, I, I", I, (Figure 2) at which to enter the multiplicand and corresponding respectively to the descending orders, hundreds, tens and units, of the accumulator. At the levers 2, 2", 2, operative only in multiplication, the numerals of the multiplier may be established. Further con-, trols comprise the master-switch" I (Figure 2), the position of which regulates the electric circuits variously active in different operations.

the cams 4, 4", 4", which in normal position support the bridges 5, 5f, 5. Deflection of the levers I, I", I displaces the cams 4, 4", 4',

releasing, respectively the bridges 5', 5' 5",

which, falling through gravity, respectively close circuits over the wires 6', e", e', (Figures 2 and 1) to the electric relays 0.2, C.2, 01".. These circuits parallel each the others, the relays C.2, 0.2", 0.2 provoking, respectively, movement of the accumulator arms GI, 6|", BI, by motor M, as presently described.

The circuit closed at the bridge 5" (Figure 2) for example, when the lever I' is deflected, originates at thesource ZZ and passes through the wire s-, the bridge 5", the wire e' over the conductor I6 at the disk 40' (Figures 1, 4), presently described, and over-the bridge 10" at the relay CA (Figure 1) to the negative pole of the relay C.2". Circuit to the positive pole of'the relay 6.2" is momentarily completed at the bridge 49".through the wire 9, connected with the source ZZ (Figure 1) through the wire s+ when, as presently described, the push-button P2, (Figure 2), is depressed. The relay C.2"' (Figure 1) is then held in stick, by circuit extending from its positive pole, over the bridges s eaves a g, 3

1 carried by relay C1" t e wire 3+, back to the source 22. From the bridge 12", so closed at the relay 0.2"", circuit through the wire It extends over the bridge It! at the relay 0.20, shown with parts broken away in Figure 1, and in entirety in Figure 9, to the positive poles of the clutches 0.5, 0.50, circuit to the negative poles of which may be selectively controlled by the master-switch I (Figure 2) or otherwise, as hereinafter described. Circuit is closed, in the accumulation of positive quantities, to the negative pole of the clutch 0.5 (Figure 1) which transmits motion in clockwise direction to the accumulator arms GI, 6|, 6I"". During the accumulation of negative quantities, circuit is da ed to the negative pole of the clutch 0.5a; and the that when theclutch 0.5 is energized and the a shaft 58 is rotated by the motor in clockwise direclaim, the shaft 58a is rotated in direction opposite thereto; and when the clutch 0.5a isenergized, and the shaft 58a is rotated in clockwise direction, the shaft. is rotated in direction cpposite to clockwise. The shaft Sta carries transmission largely similar to that carried by the shaft 58; and is provided with an additional clutch 0.8a shown in Figure 9, with broken shaft in Figure 1,- which operates as presently described when energized, the clutch 0.5 (Figures 1, 9)

clutches the armature 51 constantly revolving,

40 cumulator arm GI",

and receives motionin clockwise direction, which it imparts to the shaft 58, on which are fixed the electric clutches 0.1", 0.1", 0.1. Retraction of the plunger of the relay 0.2 (Figure 1), for example, as herebetore described, closes, at bridge 12", a circuit through the wire 1 to the clutch 0.1". This circuit originating at the source 22,

passes through the wire s+ over the bridge 13'" through the wire :i"" to the clutch 0.1 and, thence, through the wire 8- back to the source 22.

- The clutch 0.1 so energized, clutches and rotates its armature 62", which is fixed together with the accumulator arm il", on the sleeve In the same manner and through similar circuits, the relays 0.2", 0.2, controlled respectivelyby the levers I", I, close circuit at the bridges l3", l3, through the wires 1'', :i', on the clutches 0.1", 0.1 (Figurel), whose negative poles are connected with the wire and which transmit,- respectively, motion to the accumulator arms CI", 6|, through the right lateral and middle members of the differential gearings DI", DI.

- The left lateral members of these last said gearings float respectively on the sleeves tl", Cl, and receive the carry over, as above described, from nextlower denominational orders, permitting thereby, the simultaneous operation of all orders of the calculating unit. Transmission j from the units order,'at shaft 58, to the tens order, 18 by the clutch CJ'" fixed t sleeve 'I'",

geared armature 3, gears 4'', 6i" fixed on shaft '5', to diflerential Df; and'from tens to hundreds order, the corresponding members, clutch 0.8.", geared armature '2'; gears 54, i6 fixed on shaft 65' and diflerential Df. The re- 75 lays 0.2, 0.2 close, at bridges 12", I2, circuit through the'wire h to the clutch 0.5, in common with the'relay 0.2, or in negative multiplication involving reversed motion, to the clutch 0.5a. The accumulator arms 6|, GI", il" when set in motion, are severally and respectively arrested at angles of displacement determined conjointly by the levers I, I", I'", and 2', 2", 2", (Figure 2). Extending past all levers I, I", I-"', are

the multiplicand wires b'-b, corresponding re-- e spectively to the numerals 1 to 9.' Extending past all levers 2, 2", 2" are the multiplier wires u a, corresponding respectively to the numerals 0 to 9. The wires b'-b are shown as connected with terminals at the bench 80 opposite the arm I8 and as carried in a cable bb, to the levers I, I! III!- levers I, I", I'", be manually deflected, circuits are closed upon selected 1) wires (Figure 2) whence current flows through the levers I, I",

I'" and the wires 0', c", c'" (Figures 2, 1) re- I b vely. to-uie relays c.|', 0.4", c.4'", the connections being similar at all the levers I, I',

Let lever I" (Figure 2), the wire c' and 'the relay 0.4" serve as an example. If the quantity corresponding to a multiplicand be 3; the lever I' is deflected, so that'circuit is thereby closed from the wire b to the wire c carried by the lever I', and thence to the relay 0.4". It isthe function of the relay 0.4" when its circuit be completed at the timing arm It, through a wire, say for example, the wired corresponding to the multiplier 1, and wires b 0 to break, at bridge 1", circuit to relay 0.2", causing the reent example to three units. The accumulatorarms SI", SI may be similarly and respectively arrested through the action of the relays 0.4, 0.4 which break circuit to the clutches 0.2",

0.2 at the bridges II, It. 1

The moment at which the relays 0.4 0.4,

0.4" shall break, respectively at bridges Il,

ll, 10" circuit to the relays 0.2, 0.2;, 0.2",

istimedbythetimingarm I8 (Figures 1,6, 6a, 7) which is rotated as above described, on the shaft- The timing arm I8 carriesa series of conductors ll, 'l9'--ll which revolved in concentric arcs Progressive distances from its axis by the timing arm, may close circuits between various pairs of terminals fixed, at the sides of its pathway'upon benches; The position and the pathway of arm "'Il, between two typical benches tll, 80' is indicated diagrammatically in Figure 7, a space intervening between complementary fixed terminals as shown in Figure 6a, and the radii of the respective arcs being such as to insure escapement between successive terminals (Figmultiplier may be established at the levers 2', 2", 2"; closing in similar manner, circuit on the wires a-a', which extend severally past all the levers 2, 2", 2", and which are shown as carried in the cable ac to concentric groups'of terminalsatthearm"(Figures1,6). Since, when themultiplier and the multipli- According to the angle at which such cand consist of several numerals, each numeral of the multiplicand must be multiplied by each numeral of the multiplier; successive partial operations become necessary. Although multiplica- 1 tiplier; and simultaneously switches at the disk 40' (Figure 4) the circuits corresponding to all numerals of the multiplicand to successive lower orders of the accumulator, in order that the partial products may fall in descending columns. Assume the operation 26x23=598. In later disclosures descriptive of Figure 15, means are provided whereby a multiplicand such as 26 and multiplier 23 may be set up at the levers I". l', 2", 2 (Figure 2) corresponding to the tens and units orders; and the first-partial operation of multiplication be automatically shifted into the hundreds orders of the calculating unit, causing the numerals oi the product 598 to fall in their proper orders. To like eflect, in order that the numerals of the product 598 may fall in their proper orders, the multiplicand 26 and the multiplier 23, for purposes of present illustration, may be respectively set up at the levers l, I", and 2', 2", the disks 40, and 40 being shown respectively in Figures 4 and 5, in position to accommodate the operation. Deflection of the levers l, I", releases the bridges 5', 5" and closes thereby circuit through thewires e, e" to the relays 0.2, (3.2" (Figure 1).

The first numeral 2 of the multiplier is established, at the lever 2' (Figure 2). so as to close circuit on the wire a, and the second numeral, 3, at the lever 2", so as to close circuit on the wire 09. The master switch I, is placed in position 2: when the multiplicand and the multiplier are of the same quality; and the push-button R2 is depressed. were the multiplier and the multiplicand not 0! the same quality, the master switch 1 would be placed in position :0 as hereinafter described.

Closed by the master switch I through the contact plate 9, is circuit through the wire dr (Figures 2, 1), leading normally over the bridge 88 depressed at the relay C. to the' negative pole of the clutch 0.5.. An extension of the wire dr leads also to the negative pole of the relay C12. Closed by the master switch I (Figure 2) at the contact plate 12, is circuit; through the positive wire 0 (Figures 2, 1) whi t the transmitter 40 (Figure 1) is progressively closed at the disk 46 (Figure 5) on the wires 0', o", 0" leading over bridges at the relays 0.29, C 0.21"} (Figure 2) to the levers 2'. 2'.', 2'". Cloeedlikewise by the master switch 'I at the contact plate 12, is circuit from the wire s+ through the. wire in (Figures 2, 1) leading through theconductor 82 at the wheelfli (Figures 1, 3) to the relay C12 (Figure 1); and also circuit from the wire s+ through the wire 2: (Figures 2, 1) leading through the conductor 81 at 1 (Figure 1) completes circuit through the positive wire a. which directs initial impulse through the conductor I! (Figure 3) at the wheel 16 (Figure 1) and the bridges 49, 49", 49", to the relays (1.2, Q2" and C.2'. Operation follows, the pushbutton being held in depressed position by the solenoid (3.26" (Figure 2) as presently described.

The wires b-b are shown in Figure 6, as entering the orbit of the timing arm 18, in vertical direction and extending towards its axis in the form of spirals. The wires a'a traverse the wires b'-b in concentric arcs, the wire a being farthest from the axis of the timing arm 18, and the wire a, the least remote. At each traverse point of the a and b wires, are complementary terminals. superimposed in Figure 6 and exposed in Figure 6a, between which circuit may be closed through the conductors IV-19 carried at progressive distances from its axis by the timing arm 18. A contact 19 is indicated at arm 18 in Figure 6, which is not operative in multiplication.

I Depression of the push-button P.2 (Figure 2) ime ps.-

SI", 61" (Figure 1), when the timing arm II advances to one and to another of the terminals of the wires b'-b, which may be closedon the wire a through the conductor 19'. The terminals oi the wires b'-b at their intersections with the wire a in the orbit of the conductor 15", are at arcs twice as great; the terminals of the wires b'-b at their traverse points with the wire a are at arcs three times as great; and thus progressively the terminals of the wires b'-b which may be closed, through the conductor 19, on the wire a, being at arcs of 32.4", nine times greater than the arcs between the terminals at which circuit may be closed by the conductor I9.

II, accordingly, the are described by the arm II in advancing to one and to another traverse point of the wires b'-b with the wire a. correspond to one step displacements of the accumulator arms 6|, 6|", 8| (Figure 1); the are described by the timing arm 18 (Figure 6) in advaneing to one and to another of the traverse points of the wires bb with the wires a being twice as great, would correspond to two step displacements of the accumulator arms 6|, 6|", M (Figure 1). Similarly the are described by the timing arm 18 (Figure 6) in passing to one and to another traverse point of wire. a being three times as great, would correspond to three step displacements of the accumulators 8|, SI", SI' (Figures 1, 13); and the arcs to and between intersections at wire a being nine times as great, would correspond to a displacement 0! the accumulator-arms 6|, 8|", lil' oi Therefore, it the wire a be closed at the lever 2' (Figure 2) and the wire I) be closed at the lever I, the accumulator arm 8| (Figure 1) would be displaced four steps, cor'responding to the numeral 4, when. arrested by completion of the circuitby the conductor 19 (Figure 6) to the relay CA (Figure 1). as the timing arm 18 reaches the traverse point of the wires a, I) (Figure 6).

Similarly, if the wire a be closed at the lever 2" (Figure 2) and the wlreb be closed at the lever l", the accumulator arm 6|" (Figure 1) would be advanced eighteen steps, when arrested at completion of circuit to the relay 0.4" by the conductor 18, at the traverse point of the wires respectively, from the shaft 58 to the accumulator arms 6|, ii". Motion is transmitted to the timing arm 18 from the shaft 58 through the clutch 0.21 and transmission ll, i5, 16, I], hereinbefore described. As the arm I8 adv circuit is completed through the conductor 19*, at.

the traverse point of wires'a', b, (Figure 6) to the relay 0.4 (Figure 1) which breaks circuit at the bridge 18' to the relay 0.2, and arrests the accumulator arm ii at a displacement of four steps. As the timing arm 18 advances further, circuit is completed by the conductor I9 through the wires a, b", (Figure 6) to the relay 0.4" (Figure 1); and the accumulator arm GI", having described an entire revolution, is arrested at a further net displacement of two steps, a tenth step carry-over correspondtransmitter 40 (Figure 1) switches at the; disk ll (Figure 4) the current of the wire e togetherwi the current of thewirec', both closed by the lever I (Figure 2) and corresponding to the first numeral of the multiplicand, from the relays 0.2, 0.4, respectively, to the relays 0.2", r

0.4". In similar manner, at the disk ll (Figure 4) current of the wire e", together with current from thewire c", closedby the lever l" and corresponding to the second numeral of the multiplicand, are switched respectively from the re,-

lays 0.2", 0.4", to the relays 0.2", 0.4" (Figure 1).

Through the action of the transmitter 40, the operation of multiplication is accordingly shifted to the next lower orders of the, calculating unit ing to the complete revolution of the accumulator arm GI" being transmitted to the accumulator arm 6| (Figure 1) of the hundreds order, through the clutch 0.8" and transmission 63", 64', 65', 66', Dj', Bil. The accumulator arms 6|, 6|", accordingly, reflect the numerals 5 and 2, as the resultant of the first partial operation.

Rotation of the timing arm 18, initiated by the wire g is maintained until it reaches normal perpendicular position as represented in Figure 6,

- by current through wire 10 (Figures 3, l) to the positive pole of the clutch 0.2i (Figure 1) This circuit originates at the source ZZ and passes through the wire s+ (Figures 1, 2) contact plate l2, the wire 10, the conductor 82 at wheel .12 (Figures 1, 3), the bridge at the relay 0.22

(Figure l) energized through the wire 10, to the clutch 0.2L The negative poles of the relays both 0.2L 0.22 are connected through the wires swith the source ZZ. The purpose of the relays both 0.22 and 0.23, is to prevent interference of circuits through the wires 9, a and in, each of which, though indiflerent instances, closes circuit on the clutch'C.2l.

Immediately before the timing arm ll reaches thenormal position shown in Figure 6, circuit is closed by the conductor 21 at the disk 16 (Figures 1, 3) through the wires 1', 3, (Figures 2, 1) to the positive pole of the clutch 0.25 fixed to the shaft 52. (Figure 1). This circuit ori inates at the source ZZ, and passes through the w re s+. (Figures 1. 2) the contact plate l2 (Figure 2), wire :r' (Figures 2, 1), conductor 27 (Figuresfl, 3) and wire 1:, to the clutch 0.26 (Figure l), whence it back to the source 22.

A y The clutch 0.26 so energized and in continuous rotation, clutches the transmitter 41) which floats upon the shaft 53, andoperating on the wires 0', o", 0" (Figures .1, 2, 5) as presently described, shifts current from the wire 0, after passes through the wire- 8 corresponding to next lower denominations.

The transmitter 40, as shown in Figure 1,

comprises six disks 40', 40 I0 It, It, the disks 40 I0 40 being operated only in division. The disk 40 carries at its lower face (Figure 5), a conductor 4| towhich is attached a contact 42. Closed on theconductor 4| is the wire 0 (Figures 5, 1). Closed successively by the contact 42, as the disk 40 is rotated, are the wires 0', o", 0", which lead each respectively over the upper bridges at the relays 0.29, 0,29", 0.29" (Figure 2) normally closed to the levers 2', 2", 2'. The are of the conductor 81 at the wheel I6 (Figures 1, 3). is exactly sufficient to sustain current to the clutch 0.26 (Figure 1) while the clutch 0.26 displaces the transmitter 4|) from the position at which the contact 42 (Figure 5) closes on the wire 0', to successive positions at which it closes on the wire 0", and then on the wire 0". Circuit is thereby shifted downwards after the first partial multiplication, from the, lever 2' (Figure 2) and the wire a corresponding to the first numeral? of the multiplier, into connection with the lever 2" and the wire a corresponding to-the second numeral of the multiplier and eventually, were there three .numerals in the multiplier, likewise to the lever 2"".

The disk "'(Figures 1, 4) carries a series ductors at the faces of the disk Ill, float terminals of theseveral wires 0, e, c", e", c'", e'", through which, in normal position current is directed to the relays 0.4, 0.2, 0.4", 0.2, 0.4", r

0.2" (Figure 1)'through extensions of the wires 0', e, c", e", c'; :e'", leading-respectively from the opposite extremities of the concentric conductors W46. These last said terminals are spaced at arcs, which permit current through the 1 several wires c, e, c","e", c'", e" to be switched respectively, to the corresponding relays of next lowerorders, as the clutch 0.26 (Figure 1) displaces progressively the transmitter 40. I 7 Circuit 0 being shifted, by thetransmitter II at the disk llfmm the lever 2' (Figure 2) closed on the wire a corresponding to the first numeral of the multiplier 23, to the lever 2" closed on the wire a corresponding to the second numeral thereof, andthe c and e wires having been switched at the disk 4 to corresponding relays of next lower orders, permitting the de 'fiected levers I, I", to operate respectively the first partial operation, from the lever 2' closed on the wire a? corresponding to the first numeral of the multiplier, to the lever 2", closed on the wire a. corresponding to the second numeral of the multiplier. Simultaneously, the

thereon; the' wheel ll (Figure 1) revolving, again momentarily completes, at the conductor- (Figures 1, 3) circuit through the. wire 0 (Figure 1) to the relays 0.2", 0.2" and the multiplicand 26-is multiplied by the numeral 3,

pressedby the solenoid 0.22".

The circuit of this solenoid 0.28" originates at On these conthe push-button 2.2 (Figure 2) being held de the source 22 (Figure 1), and passes through the wire (Figures 1, 2) the conductor ll at the disk 40 (Figures 1, 5), the wire 11 (Figures 1, 2) the bridge 32", the solenoid 0.28" (Figure 2) and thence back through the wire 3- (Figures 2, i) to thesource ZZ. Circuit to the solenoid 6.2!" remains active, until multiplication is flnally completed, when, after sucessive shifts at the transmitter 40 (Figure 1), the wire 11 (Figure 5) is thrown into open circuit, as current from conductor 4i advancing, fails. Circuit to the solenoid (1.28 is thereby broken and the push-button P.2 is restored to normal position by the action of a spring 3.34" (Figure 2).

The second partial operation having been initiated by impulse through the wire g as circuit is again completed through the conductor 85 (Figure 3), to the relays (2.2", 0.2", (Figure 1). The wheel 15 (Figure 1) and the timing arm 18 enter on a second revolution; the wire a corresponding to the second numeral 3 of the multiplier, in turn operating on the wires 1), b", corresponding to the multiplicand 26. As the timing arm 18 (Figures 1, 6) advancing, closes through conductor 19 the wire aiupon the wire I) the accumulator arm 6|! (Figure 1) is arrested at an advance of six steps, which added to its original net displacement of two steps give the accumulator arm iii" an angular displacement of eight steps. The accumulator arm BI" is in turn arrested, as the'timing arm 18 reaches the terminals of the wires a 1) (Figure 6) and, having described a complete revolution, rests at a net displacement of eight steps, the ten units corresponding to the complete revolution of the accumulator arm ii' being transmitted as carry-over to the accumu-.

lator arm 6|", which is thereby advanced an extra step. The final displacement of the accumulator arms 8|, H, il' reflects accordingly, 598, the product.

Should a zero appear in the multiplier, and consequently a partial multiplcation be suspended;

transmission of motion from the shaft 53 (Figure 1) to the shaft 58, is interrupted, by breaking the circuit of the wire it to the clutch C5. This is (Figure 1) and solenoid 0.2;" (Figure 2), the

accomplished b means of the relay C.l. Said relay C.l is in a circuit which originates at the source ZZ and passes through the wires 3+, 0 and wire 0', o", 0" (Figures 1, 2) already traced, progressively to the levers 2, 2", 2" (Figure 3) ashereinabove descibed, and thence through the wire a over the bridge at the relay 0.3 (Figure 1) to the positive pole or the relay C.I, the negative pole whereof is connected through the wire back to the source ZZ. If the wire a be closed at the lever 2', 2", 2" (Figure 2) which at the time be receiving current from a wire 0', o", 0",

the relay C.l (Figure 1) breaks at the bridge carried at the upper extremity of its plunger, circuit through the wire it to the clutch C5, or as it may be in negative multiplication to the clutch (3.51:. If there be successive zeros in the multiplier, action at the relay C.l, is repeated.

In order to insure the presence of the arm ll in normal perpendicular position as shown in Figure 6, when initiating an operation in multiplication, the push-button P. (Figure 2) is manually depressed. It is held in such position by the solenoid 0.28 on which circuit is thereby closed and which is held in stick, through a current which, originating at the source ZZ (Figure 1) passes through the wire 8 (Figures 1, 2), bridge at thepush-button P. (Figure 2), the wire z (Figures 2, 1), conductor 83 (Figure 3) at the wheel 10 (Figure 1) to the positive poles of the relay 6.2!

negative poles whereof, are connected through the wire swith the source ZZ (Figure 1). The relay 0.2!, so energized, transmits motion through the transmission 14, 15, l6, 11, until, as the timing arm ll reaches normal perpendicular position (Figure 6), circuit to the clutch 0.2! and the solenoid 0.28" is broken at the conductor 83 (Figure 3), arresting thereby the timing arm 18 in normal perpendicular-position (Figure 6), and releasing the push-button PA (Figure 2) In order to provide that the transmitter l0 (Figure 1) be in normal position, when initiating an operation of multiplication, the conductor 43 (Figure 5) carried at the lower face of the disk ll (Figure 5), closes circuit on the positive pole of the clutch 0.26 (Figure 1). When the shifts of circuit incident to the operations of multiplication have been completed, such final shift carries the extremity of the conductor 43 into contact with the fixed terminals 44. The circuit so closed by the conductor 43 originates at the source ZZ (Figure 1), and passes through the wire 3+ and the conductor 43 (Figure 5) to the positive pole of the clutch 0.26 (Figure 1), the negative pole whereof, as already stated, being connected. through the wire 8-, back to the source ZZ. The clutch C.26 so energized, clutches the transmitter 40 and rotates it onward to normal position, the arc of the conductor 43 (Figure 5) being such that when the transmitter reaches normal position, circuit to the clutch (3.26 fails.

Multiplication of mixed quantities-positive and negative In operations of multiplication ,when a negative quantity enters with a positive, the master switch I (Figure 2) is placed in position a:(). In this position the master switch I closes the same circuits, as in multiplication of quantities of similar quality, except that through the'wire i a positive current is closed at the contact plate l2 (Figure 2), to the relay C.l I, over the bridge 20!, and the bridge Ill at the relay 012, which is energized, as hereinbefore described, by the wire dr. The relay C. so energized switches at the bridge 2!, current from the wire dr to the clutch Clo which transmits motion in direction opposite to clockwise, as hereinbefore described, to the accumulator arms 6| 6|", il' (Figure 1). The operation is similar in all particulars to the multiplication of two positive quantities or as it might be of two negative quantities, except that the direction of motion of said arms is reversed, carry over, as presently described, being effected by the transfer clutches 0.8, C3", during each tenth step and borrowing during each first step, in which ever direction from zero position the accumulator be initially displaced.

The product in multiplication is automatically added or subtracted, according to its positive or negative quality, to or from any quantity which the accumulator II, M", H' (Figure 1) already may reflect. Should a positive quality, for example, be already latent at the accumulators H, II", II'" (Figure 1) and, the factors being of dissimilar quality. a greater negative product be transmitted thereto: the quantity reflected at the counters 8|, 8|", il'", would first be reduced automatically to zero by operation in the nature of subtraction; and on passing through zero, operation would follow in the nature of addition, until the negative resultant be completed.

Referring to Figure 9. the shaft Ila carries the sleeves la, "a", "a" which are rotated respectively by the clutches 0.1a, 0.1a", 0.1o"

carried by the shaft 58 and rotated by the motor M through the clutches 0.1, 0.1", 0.1. Circuit is closed simultaneously at the bridges l8, Ila, respectively (Figuresl, 9) through the wires '.simultaneously with the sleeves so', so", or",

1'', id, to the clutches 0.1, 0.1a. Circuit is closed simultaneously at the bridges '18", 18a", through the wires a', in", to the clutches 0.1",

- 0.10"; and circuit is closed simultaneously, at the bridges 13'",- 13a'", through the wires 1"", ia,

to the clutches 0.1, 0.1a'", the negative poles" of the clutches 0.1, 0.1a, 0.'|",-0.-'|a, 0.1",

0.1a' being all connected through the wire s with the source ZZ.

The armature of the clutch 0.1a isthe geared wheel 62a (Figure 9) whichfloats on the shaft through a composite'idler not shown but similar to the idler 61' (Figure- 1), and the diflerential dfa' (Figure 9) the middle member of which is 880 and transmits motion to the sleeve 68a','

is borrowed throughout ascending orders of the circuit controller, at shaft 58a; and the armature 68a (Figures 9, 10) is displaced 36 in direction opposite to clockwise.

The terminals ofthe wire do are in such position relative to the positive contact bands 88a, 88a", 3811", which extend through36, that if a clutch 0.8a, 0.8a 0.8a be displaced from zero in clockwise direction, as in the subtraction of a-positive quantity, a quantity is borrowed throughout fixed to the sleeve 60a. The armature of .the

clutch 0.1a" is thegeared wheel 62o", which floats on the shaft 58a and transmits motion to the sleeve 60a" through a composite idler similar to idler 61" (Figure 1), and the differential din." (Figure 9), the middle member of which is, flxed to the sleeve 60a". clutch CJa' is the disk 6211" fixed to the sleeve 604'. a

The carry-over, at the shaft 58a, is transmitted fromv the sleeve 6011"" to the sleeve 804", by the clutch 0.8a' integral with the sleeve 68a, the geared armature 63a floating on the shaft 88a and transmission similar to the pinion 64" (Fig ure 1) pivot 65", and the pinion 66", to the left lateral member of the differential dfa" (Figure 9) which floats on the sleeve 68a". The carry-over is inlike manner transmitted from the sleeve 68a" to the sleeve 60a, by the clutch 0.8a" fixed to the sleeve 68a", the geared armature 83a" and transmission similar to the transmission 68', 65', 66 (Figure 1), and the differential dfa (Figure 9), theleft lateral member'oi which floats on the sleeve 60a. i

Integral with the sleeve 60a is a clutch 0.8a (Figures 1, 9) similar to the clutches 0.8a",

' 0.8a'" which transmits carry-over to a denominational order consisting of a single member, the

armature 63a. This'order is higher" than the highest order of the accumulator and corresponds to thousands, in the present drawings. The armature 63a carries aconductor 90 (Figures 9; 10)

The armature of the ascendingorders at-shaft 88a, and the armature 88a is displaced 36", in clockwise direction, (clockwise movement in Figure 10 being towards the left, because of viewpoint).

So long as operations remain within the zone of positive quantities, the armature 88a, dis-. placed in direction opposite to clockwise, closes I circuit from the wire s+ through the conductor 88,

which-governs duplicate circuits to the clutches I positive contact bands 36", 36", being broken 1 atthe bridge 92*, and the circuit of the wire d v to thep0sltive contact bands 38", 38'" being broken at the bridge 82*. The clutches 0.8",

- 0.8", may then be displaced from zeroin either direction withoutborrowing and thereby displacing higher orders. The contact bands 36",

36'", 38", 38'", extend each through 36 of are.

When the accumulator is at zero, circuit is carried by the armature 83a, to the'wire it. So long as operations be within the zone of negative quantities, the armature 63a, displaced in clockwise direction, closes circuit from the wire s+ through the conductor 88, to the wire (1'.

When the wire d is closed by the conductor 80, circuit is completed to the relay 0.25, the negative pole of which is connected through the wire sback to the source ZZ, The relay 0.28 so energized retracts the plunger 8|, common to the relay 0.25, and closes at the bridge 82, circuit through an extension of the wire d to the terminals cooperative with the clutches 0.8", 0.8", the contact bands 36", 86' which are so placed relatively to the terminals of the wire d, that the clutches 0.8", 0.8" are energized at each tenth space displacement clockwise in every revolution, and at such tenth space displacement transmit a positive carry-over. At each first-space displacement in opposite direction within the zone of positive quantities the clutches 0.8", 0.8", borrow. So long as operation remains within the zone of positivequantities', the wire d is active.

When the wire 41' is closed by,the conductor 90, circuit is completed to the relay 0.25, the negative pole of which is connectedthrough the wire 8" back to the source ZZ. Therelay 0.25 soenergized, retracts the'common plunger 81; and closes at the bridge 82* circuit through an extension of the wire d to the clutches 0.8", 0.8", the con act bands 38", 88 at which, are

' so placed relatively to the terminalsof the wire d, that the clutches 0.8", 0.8", are energized at every tenth space displacement in every revolution'opposite to clockwise, andat such tenth space displacement transmit a negative carryover. At each first space displacement clockwise, within the zone of negative quantities, the clutches 0.8", 0.8", borrow. So long as the operation remains within the zone of negative quantities, the wire (1' is active.

When thewire d is active, circuit is broken at the bridge 92 from the wire 8 to the wire do, which remainsopen, and is closed at the bridge 82' from the wire 11 through the wire da tothe clutches C.8a',-C.8a 0.8a', which, so

long as theoperation remains within the zone of positive quantities, borrow while the clutches 0.8", C.8' are transmitting positive additive carry-over; and transmit carry-over, while the 0.8", C.8' are additively transmitting negative carry-over; and transmit carry-over, while the clutches 0.8", 08'' borrow.

The initial step displacement as the'circuit controller passes from zero position, into either positive or negative quantities, causes borrowing, as above described, at the clutches C.8a, 0.8a", C.8a, whichdisplaces the armature 63a. Conversely, as the circuit controller returns to zero position, through either positive or negative quantities, the last unit displacementof a clutch C.8a',

0.8a", C.8a', causes a carry-over to be transmitted to the armature 63a, which is thereby in addition to the accumulator arms 6|, BI",

61", corresponding to hundreds, tens and units, the accumulator arms 6|", 6|", 6|, corresponding to tenths, hundredths and thousandths; the

restored to normal position, throwing the wires d, d, and the clutches C.8", C.8"' again into open circuit; and permitting the bridges 9|, 9l again to close circuit from the wire s through the wires both do and do, to the clutches 0.8a, 0.8a", C.8a"".

As hereinbefore. disclosed, the direction of movement at the accumulator (Figures 1, 9) is conditioned by the master switch 1 (Figure 2) accordingly as the factors be similar or dissimilar in quality. If there be a quantity already latent at the accumulator, to which the product be added, or from which the product be subtracted; the quality of the net resultant is distinguished according to the direction of displacement of the disk 63a (Figure 10), which when the resultant is negative closes the circuit of the wire I d to the solenoid 0.64 (Figure 14), causingsaid solenoid to elevate an inking ribbon 233 of dual color, and identify the quality of the quantity in red. If the resultant, be positive, the said solenoid remains inactive,- and the quality is identified in black. The extension of the wire d designated as wire d", is shown in Figure 1 which leads to he solenoid 0.54. If the accumulated quantity be positive, the tep displacement of accumulator arms reads from zero to the right; and to the left, if negative. Relays such as 0.41 (Figure 13) are energized by the Wire 11', when negative, and so shift numeral circuits such as af -af that-the steps may be measured serially from 1 to 9 and not by complementary numerals, whichever such direction he.

- Column shift initial column-shift to denominationally higheror lower orders, preparatory to computation of the product at selective accumulator members, and the eventual identification of itsdenominaticnal recorded value by a decimal point.

electric button l5 at the master switch 1, which are similar inprinciple howsoever many denominational orders it may comprise; and further description is accordingly limited to the automatic assignment of resultants to their proper columns, and their operation relatively to the position of the decimal point.

In multiplication the circuits closed at the levers |-l." are shifted upwards or downwards as many orders as the first digit of a multiplier lies to the left or to the right of the units order. Products are thereby developed in their proper denominational orders, at corresponding orders of the calculating unit; assigning the decimal point thereby to its proper place.

Identification of the highest denominational order of a multiplier is accomplished by means of the wires are, (Figure 15), leading to bridges at the levers T4, the circuits of these wires being closed at the master switch 1.

The outer extremity of the master switch i is provided with a button l5. When the master switch I is advanced to position (x), the button I5 is momentarily depressed closing and immediately breaking at the terminal M8 the circuit of the wire sx leading from the source 2.2, to various members, as now shall be described. The wire ax on which circuit is so closed through the contact plate II from the wire sr+ passes first to and over the bridge 220', at the lever 2, and

thence, to and over the bridges HEW-22D" at the levers 2-2 The bridges 220 220 are normally supported by the cams 22l-22|", fixed to the shafts l8'l 8" of the levers 2'4", and are released, each when its corresponding lever be deflected. So released, the bridges 220'420", in falling, close respectively circuit on the Wires aa:'aa:"; of which only the circuit closed at the highest deflected lever becomes active; since each bridge in falling, breaks the circuit of the wire or to all bridges therebelow. The circuit amam" which thus is active, identifies the highest order of the multiplier and, by energizing as presently described the clutch 0.26, operates the required shift of circuits at the transmitter 40:: which shall cause the first numeral of aproduct, to fall in proper column. At lever 2", corresponding to the units order, the bridge 220" breaks circuit without closing one. Since, if the first digit of the multiplier be of the units order; no shift of circuits is required.

Let the operation 3l.17 23.2=723.144, be as- ,sumed as an example. The product is 723.144, of

which the numeral 7 should fall in the hundreds order, the numerals following thereon falling successively in the orders therebelow, and the decimal fraction always assuming its position to V the right ofthe decimal point, howsoever many decimal orders there may be.

The first numeral of the multiplicand in the present example, is established, by deflecting the lever I" (Figure 15) corresponding to the tens order of the accumulator members, and the relevers therebelow. .The master switch 1 is placed in position (in) (Figure and circuit is momentarily closed at the terminals M8, by depression of the button IS.

The highest order at which circuit is closed by the levers of the multiplier is the tens order; and the wire am" is rendered active, the circuit of which passes to the positive pole of the relay,

0.42", the negative pole of which, as are the' negative poles of. all the 0.42 relays, is closed on the wire sr.

The relay 0.42" energized as the button I5 carried by the master switch 1 is momentarily depressed, retracts its plunger; and is held in stick through the higher bridge at the relay 0.42" by current from the wire son; closing over its lower bridge, current from the wire s.1:+ to the wire car" which leads to the conductor 226" (Figure 16) carried'by the disk 4!! (Figure 15), from which conductor 226" current is transmitted to the positive pole of the clutch 0.26 (Figure 15) through the wire eat from the terminal 221 (Figvures 15, 16) common to all the ea: wires. Circuit is completed to the negative pole of the clutch 0.26, in such operation, through the wire s1:-

- closed at the master switch 1. The clutch 0.26

so energized and constantly revolving, clutches and rotates the transmitter 40a and the disk 40, to an angle of displacement corresponding to the arc of the conductor 226" (Figure 16). Such angle of displacement, as shown in Figure 16, is 324, beingsuch, that the wires c",'e"' (Figure 17) normally closed by the lever i" to the relays to lower levers as successive partial operations are shifted downward by'the transmitter 464:.

The initial shifts of the c, e, o circuits havin been effected, the push-button R2 is depressed, breaking at thebridge 34" the circuit of the wire szctothe negative pole of the clutch 0.26

(Figure 15), and closing the circuit of the wire 9, as hreinbefore described, to the relays 0.2'0.2 The operation of multiplication follows, and in the example 31.17X23.2=723.144, the first numeral 7 of the product, is reflected at the accumulator number 6| corresponding to the hundreds column; with descending numerals following in order.

If the operation were 400X.002=.8; the lever l' corresponding to the hundreds order is deflected to establish the multiplicand; and the lever 2" corresponding to the thousandths order is deflected, to establish the multiplier. The first 0.4", 0.2" (Figure 1) of thetensorder, are

switched to extensions of the wires 0', e', (Figure 15) leading to the relays 0.4, 0.2, of the hun dreds order, the c, e, circuits at lower orders being simultaneously switched at the disk 40a, each to the order next above. The first partial multiplication is thereby shifted from the tens to the hundreds order of the calculating unit,

and the first numeral of the product is developed at the accumulator arm 6|. Should acarryover he developed, it would automatically betransmitted to an eventual next higher accumulator arm, in manner hereintofore described, the

quantity so transmitted being, nevertheless, gen-,

der upwards, the circuit of the wire 0 is switched denominatio'nally upwards in like measure at the disk 4M (Figure 18) breaking circuit to the units lever 2" 'and closing circuit on the wire 0" to the lever 2" corresponding to the order of the digit of the multiplier is three columns to the right of the units column. From the lever 2", the circuit through the wire as" is closed to the relay 0.42" which completescircuit through the wire er" and the conductor 226' (Figure 16) to the clutch 0.26. The wires 0', e are thereby shifted downwards to the relay 0.4", 0.2 (Figure 15) at the tenths order, this three order shift of the multiplicand downwards corresponding to the number of columns at which the highest significant digit of the multiplier .002 falls to the right of the units column. Accompanying this shift of the c, 0 wires three denominational orders downwards, is a shift of the, circuit 0 three orders downwards, switching current (normally closed on the wire 0'"), to the wire 0'! leading to the lever 2. The resulting quantity is developed at the tenths order, and the product is .8.

Were the operation .02x400=8; the levers i 2' (Figure 15) would be deflected, and the. c, e

circuits of the multiplicand .02 would be shifted upwards two denominational orders to the units order, these two orders upwards corresponding to the number of columns the highest digit of the multiplier 400, falls to the left of the units 601- umn.

The wire 0 would be switched upwards two denominational ordersin like measure, current thereby being closed from the wire 0 to the wire 0' leading to the lever 2,. The resultant 8 would be developed at the units order; and the numeral 8 would be reflected in the units column.

Depression of the push'button R2, after shift of'circuits, the operation of mu1tiplication breaks the circuit of the wire sr, to the clutch 0.26, and relays CAP-0.42", at the bridge 34".

It is, as hereinbefore described, a function of f the conductor 43 (Figure 18) to operate in restoring the transmitter 40 to normal position. To prevent premature action by the conductor 43, the circuit leading from the terminals .44 to the clutch 0.26 is-broken by the relay 0.61 until coinputation be completed. The relay 0.61 is in a circuit which originates at the source ZZ (Figure 15) and passes through the wire 8", contactplate l2, wire 0, conductor 4| (Figure 18), wire 11, relay 0.61, and the wire s,'back to the source ZZ. The last shift of circuits, in operation of multiplication, as,conductor 81 (Figure 3) closes tens, and the first numeral of the present multiplier. In similar manner, the wire '0 will always close circuit, during the first partial operation, to the lever 2'4", corresponding to the first digit of the multiplier; closing circuits progressively circuit, as hereintofore described, to the clutch 0.26, carries the conductor 4| beyond-the tar-- minal of the wire 0, and closes circuit from the conductor 43 to the terminals 44. The relay 0.61 releasing its plunger completes circuit to the clutch 0.26, and the 'arc of the conductor 43 is such that circuit to the clutch (2.26 is maintained until the position of the transmitter Ila is restored to normal.

Restoration of the calculating unit to zero position Depression of the push button P5 (Figure 2) closes a circuit which originates at the source ZZ (Figure 1) and passes through the wire s+ (Figures 1, 2) the bridge at the push button P5 (Figures 2, 9), the wire n tothe relay 0.19, (Figures 2, 9), best shown in Figure 9, and over the upper bridge on the plunger thereof, to the relay C10, circuit being closed from the negative poles or the relays both 0.19, 0.2!, through the wire a, back .to the source ZZ. The relay 0." so energized retmcts its plunger; and, when completing circuit at its upper :bridge to the relay 6.2!; closes at its lower bridge circuit to the negative pole of the relay CA2, and to terminals at the plunger 0! the relay C. l 2'. The relay Cl" breaks,

at the bridge 161, circuits through the wire it (Figure 1) to prevent interference of circuit with the shaiit SI, circuit of the wire 11 is open at the conductor 90 (Figure 10); the relay 0.11 (Figure 9) closes at the bridges I05, I 06, depressed, circuit through the wires 11' closed by C." at lower bridge and through n, to the negative and positive poles of the clutch Ciia, and moti shafit 58 is opposite to clockwise. It a quantity accumulated at the shaft 58 be negative: the wire d is active as hercinbeiore described, and enersizes over the bridges 92, I, the relay CJI', which is then held in stick over the bridge I by current through the wire n. The relay 6.12 so energized, closes at the bridges i", I" raised, circuit to the clutch 0.5; and clockwise motion follows at the shaft 58.

Responsive to the clutch 0.6, and floating on the shaft. 58, is the armature '9 (Figures 1, 12)

which carries a conductor I12, extending. except at a slight arc, throughout the circumference of the disk. Momentary depression or the push button R5 (Figure 2) imparts initial impulse to the clutch 0.5 or (7.5a and 0.6. Th clutch C. or

0.5a revolving, transmits motion to the shafts 58, 58a; and the clutch C5 clutching and revolving the disk 89 causes the conductor I12 (Figures 1, 9, 12) to close a circuit from the wire s+ extended from the source ZZ, which holds the relays C.'l-9,'C.'2ll in stick, and sustains current to the clutches (2.5 or C.-5a and 0.6, alter the initial impulse imparted through the push button P45.

' The conductor I12 (Figure 12) is of such are as to sustain current throughout a. single revolution of the shaft 58, this being suflicient to restore to zero position, the members of .the calculating unit.

The clutches 0.1, 0.1", C.1", 0.1a, Clio",

0141' (Figures 1, 9) are active, in restoring to zero position the accumulator arms 81', 81", 61 and such other members at the shafts 58, 58a, as may be displaced. The clutchw 0.1, 0.1", 0.1", are energized to restore members on shaft 58, by circuits of the wire n which pass of the respectively, over the bridges ill, I10, I" at the relay C. (-Elgure 1) and conductors I13, I13", "3'", circuits being completed from the negative poles oi the clutches (2.1, (1.1", 0.1" through wires back to the source ZZ. The conductor at all orders is substantially alike. Referring to Figures 1, 11, conductor "3'", for example, extends throughout the circumference of the member 92" except at a slight arc, at which, it the member as" and the accumulator arm il'" be already at zero position, circuit is open to the relay 0.1" (Figure 1). If .the accumulator arm U'" and the member 63" be displaced; circuit is completed through the conductor 113" to the clutch 0.1", which clutching, in manner hereinbeiore described, the member 62", transmits motion to the member '2', until circuit to the clutch 0.1" is broken'atthe conductor m'f'.

as the accumulator arm 81' and the member 02!" reach mem The accumulator arms 6|", I

are restored tozero position, by circuits similarly closed and broken, leading to the clutches 0.1", 0.1" (Figures 1, 9). The members carried by the shalt "a may be restored to zero position in similar manner, by extensions of the wire n leading respectively irom the bridge lfla at the relay C." shown in entirety in Figure 9, to the clutch C.1a"', from the bridge 110a .to the clutch 0.10:": and from the bridge =l1la to the clutch C.1a'. Conductors similar to the conductor 1113" (Figare 11) are carriedby the disk 6211", and by the middle members of the planetary gearings die", die, which break circuit respectively to the clutches 0.10", 0.10", 0.1a, as the sleeves 8011', "a", la reach zero position corresponding members of fractional denomination may be restored by similar means to zero position.

During the restoration to zero; circuit to the clutches CJ", CJ', CJG", C.8d", through the wire d:- is. broken at the lower bridge at the relay 0.40, and the carry-over mechanism is inactive, except as to the clutch 0.8a whose negative pole is connected with the wire s", and which restores to normalposition the armature 830'.

Having now fully described my invention and its manner of operation, I claim:

quantities one by the other, a rotary timing arm, conductors carried by the timing arm at progressive distances from its axis and displaceable by the timing arm in concentric arcs, selective numeral circuits corresponding to a multiplicand, selective numeral circuits corresponding to a multiplier traversing the circuits corresponding to the multlpllcand in the arcs of said conductors. spaced complemental contacts in the circuits at the points of traverse, means angularly to displace the timing arm between the complemental contacts from zero position to cause a said conductor to close circuit between the complement-cl contacts of the selected factor circuits, the points of traverse being so placed that the degree of angular displacement of the timing arm from zero position to the traverse point of the selected factor circuits is proportionate to the product of the numerals to which the last said circuits correspond.

2. In an electrically actuated calculating apparatusfor multiplication, an accumulator comenergize the clutches, digital circuits corresponding to the numerals of the multiplicand, digital circuits corresponding to the numerals of a multiplier, immobilizing circuits and devices controlled by last said circuits, means including a progressive timing member operative from zero position and synchronized with the accumulator members for closing a said digital circuit corresponding to a selective numeral of the multiplier on the digital circuits corresponding to the numerals of the multiplicand for selectively completing the immobilizing circuits to energize said devices and breakthe actuating circuits to deenergize the clutches when operative invariable degree according to the products of the multiplicand numerals multiplied by said numeral of the multiplier.

3. In an electrically actuated calculating apparatus for multiplying one by the other quantities whether positive or negative, an accumulator comprising members corresponding to decimal orders and angularly displaceable in respective opposite directions. to accumulate a positive or negative product, denominational clutches to operate the members, means to render the clutches efl'ective at the zero point of a cycle and including actuating circuits corresponding to v the orders of the multiplicand to energ zethe clutches, reversible driving means for operating the clutches to add or subtractthe accumulated product from any previously accumulated quantity latent in the accumulator accordingly as the said quantity and the accumulated product be similar or dissimilar in quality, digital circuits corresponding to the numerals of the multiplicand, digital circuits corresponding to the numerals of the multiplier; immobilizing circuits and devices controlled by last said circuits, means including a progressive timing member operative from zero position and-synchronized with the accumulator members for'closing a digital circuit corresponding to a numeral of the multiplier on the digital circuits corresponding to' the numerals of the multiplicand for selectively completing the immobilizing circuits to energize said device and break the actuating circuits to deenercuits to energize said devices and, break the actuating circuits to deenergize the clutches when operative in variable degree according to the products of'the multiplicand numerals multiplied by a said numeral of the multiplier, a transmitter provided with switch elements, a clutch to operate the transmitter, means including a conductor synchronized with the timing member to energize last said clutch' after partial operations, severally to close the circuits corresponding to the successive numerals of the'multiplier and shift the said actuating and immobilizing circuits, into cooperative connection with the accumulator members of progressively lower orders to cumulate a final product.

5. In an electrically actuated calculating apparatus for multiplying quantities involving whole numbers or decimal fractions, an accumulator comprising members corresponding the decimal orders, denominational clutches to operate the members, means to render the clutches efiective at the zero point of a cycle and including actuating circuits corresponding to the significant orders of the multiplicandto energize the clutches,

digital circuits corresponding to the significant numeralsof the multiplicand, a digital circuit corresponding to the numeral of a multiplier, immobilizing circuits and devices controlledby last said circuits, means including a progressive timing member operative from zero position and synchronized with the accumulator members and provided with contacts operative on -terminals paired in decreasing radii at increasing angles to close the digital circuit corresponding to the numeral of the multiplier on the digital circuits corresponding to the numerals of the' multipiicand "for selectively completing the immobilizing circuits to energize said devices and break the actuating circuits to deenergize the clutches when operative in variable degree according to the products of the multiplicant numerals multiplied by the said numeral of the multiplier.

6. In an electrically actuated calculating apparatus for multiplying quantities involving whole numbers or decimal fractions, an accumulator comprising members corresponding todecimal orders, denominational clutches to operate the members, means to render the clutches effective gize the clutches when operative in variable ratus for multiplication, an accumulator comprising members corresponding to decimal orders to accumulate a product, denominational clutches to operate the members, means to render the clutches effective at a zero point in a cycle and including actuating circuits corresponding to the orders of the multiplicand to energize the clutches, digital circuits corresponding to the numerals of the multiplicand, digital circuits corresponding'to the numerals of the multiplier, immobilizing circuits and devices controlled by last said circuits, means including a progressive timing member operative from zero synchronized with the accumulator members to close a digital circuit corresponding to" a selective numeral of the multiplier on the digital circuits corresponding to the numerals of the multiplicand for selectively completing the immobilizing cirposition and at the zero point of a cycle and including actuating circuits corresponding to the significant orders of the multiplicand to energize the clutches, digital circuits corresponding to the significant numerals of the multiplicand, digital circuits corresponding to the significant numerals of the multiplier, immobilizing circuits and devices controlled by last said circuits, means including a progressive timing member operative from zero position and synchronized with the accumulator members to close a selective digital circuit corresponding to a numeral of the multiplier on the digital circuits corresponding to the numerals of the multiplicandforselectively completing the immobilizing circuits to energize said devices and break the actuating circuits to deenergize the clutches when operative in variable degree according to the products of themultiplicand numerals multiplied by a said numeral of the multiplier, and means for columnshift comprising a transmitter provided with switch elements, av

clutch to operate the transmitter, means including selective conductors of different amplitude and a denominational circuit corresponding to the initial significant numeral of the multiplier 1 2 ing to said initial numeralot the multiplier, and said actuating and immobilizing circuits, upwards or downwards into cooperative connection with the accumulator members denominationally higher or lower than the orders of the multiplicand, commensurately with the denominational value of said initial significant numeral 0! the multiplier above or below the units order.

- 7. In an electrically actuated calculating apparatus for multiplying quantities involving whole numbers or decimal fractions, an accumulator -comprising members corresponding to decimal orders, denominational clutches to operate the members, means to render the clutches effective at the zero point of a cycle and including actuatin: circuits corresponding to the significant orders of the multiplicand to energize the clutches, digital circuits corresponding to the significant numerals of the multiplicand, digital circuits corresponding to the significant numerals of the multiplier, immobilizing circuits and devices controlled by last said circuits, means including a progressive timing member synchronized with the accumulator members operative from zero positionand to close a selective digital circuit corre- M spending to a numeral of the multiplier on the digital circuits corresponding to the numerals oi the multiplicand for selectively completing the immobilizing circuits to.energize said devices and break the actuating circuits to deenergize the clutches when operative in variable degree according to the products of the multiplicand numerals multiplied by said numeral oi the multiplier, and means for column shift comprising a transmitter provided with switch elements, a

clutch to operate the transmitter, conductors corresponding to variable degrees of column shift, and means including,a denominational circuit corresponding to the highest significant order of the multiplier closed to a said conductor to energize the last said clutch and cause the transmitter to switch the digital circuit corresponding to the initial significant numeral oi the multiplier, the said actuating circuits and the said immobilizing circuits, upwards or downwards into cooperative connection with the accumulator

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