Patent GB-519898-A (GB)
Title: Improvements in or relating to counters and registers
Filed: 1938-10-06
Abstract: 519,898. Calculating - apparatus. BRITISH TABULATING MACHINE CO., Ltd. Oct. 6, 1938, No. 29036. Convention date, Oct. 7, 1937. [Class 106 (i)] A totalizing - counter for calculating machines comprises, for each denomination, a rotatable registering member, a driving member clutchable to the registering member a clutch-control member rotatable with the registering member and a number of clutch actuators movable collectively into and out of the path of the clutchcontrol member As applied to a Hollerith tabulating machine with a motor driven shaft 22, the shaft 22 drives a shaft 27, Figs. 1 and 2, carrying gears 220. Each gear drives a larger gear 219, 222 that meshes with pinions 223 spaced on a plate 221 each pinion serving to drive one denomination of the totalizer. By this gearing the pinions 223 are driven in synchronism with the passage of the record cards past the lower reading brushes of the machine. To each pinion is secured a ratchet wheel 204 rotatable on a shaft 225 with an arm 226 carrying a spring controlled clutch pawl 203. The shaft 225 is supported in a bushing 228 fixed to the plate 221 and carrying a notched disc 229 that co-operates with ten bell crank levers pivoted on the plate and constituting clutch actuators. One of the actuators 231, Fig, 3, is formed with a bifurcated arm to receive the free end of an armature 234 of a pair of magnets 200A, 200S. Each actuator is provided with an extension 236 one of which normally engages the tail of the pawl 203 to hold it out of driving engagement with the ratchet wheel. The amount which the arm 226, forming the registering member, is advanced is determined by the time interval between the energization of the magnet 200A and the subsequent energization of the magnet 200S. The magnet 200A is energized in response to the reading of a hole in the card and the magnet 200S is energized at the " 0 " position when effecting addition. For subtraction purposes which is effected by adding the complement the magnet 200A is energized at the " 9 "  position and the magnet 200S is energized in response to the reading of a hole in the card. The shaft 225 has secured thereto a wheel 237 of insulating material with a spring pressed contact plunger 142, Figs. 2 and 4 that co-operate with ten fixed contacts 143, a collector ring 238 and a brush 239. A special contact 209 and plunger 210 associated with a collector ring 240 and brush 241 is provided for transfer operations. The circuit for the transfer operation through the contacts 209, 210 is set up through contacts 206, 207, the contacts 206 being mounted in a slide 243 controlled by a cam projection 242 on the wheel 237. Restoration of the slide 243 to normal position is effected by a cam 244 on the gear 219. A switching device for the magnets 200A, 200B is shown in Fig. 5 and comprises a cam 245 on the wheel 219 with a follower 246 operating a slide 247 with pairs of spring connected balls 202, one pair for each denomination, for co-operation with pairs of contacts 201a, 201b and 201c. The timing is such that during the reading of the cards the balls engage the contacts 201a from the " 9 " to " 1 " position; at the " 0 " time in the cycle they engage the contacts 201b and at the " 11 " time the contacts 201c. On the return of the side the balls engage the contacts 201b at the " 12 " time and then on to contacts 201a. The plates 221 carrying the totalizer units are arranged for ready removal from the machine and the various circuit connections terminate in contacts 250 that co-operate with fixed contacts 251 in the machine. To look the various units in their set position when the plate is removed a pivoted member 252, Fig. 6, with arms 253 engaging a projection on one of the actuators 231, is controlled by a lever 255 and a three-armed member 258. When the plate 221 is inserted the member 258 co-operates with a slot 260 to render the arms 253 inoperative. During the latter part of each machine cycle a cam 264 operates the lever 255 to effect a positive restoration of the actuators 231.  Circuit diagram. When a lower brush LB, Fig. 7, encounters a hole, say in units denomination, a circuit is completed from line 152. through card lever contacts LCLC, cam contacts 164 contact roller 50, units brush LB. connection 165, plug connection 166, relay contacts MCR4b, the contacts 201a, the balls 202 and the units magnet 200A to the line 151. At the " 0 " time the circuit to the magnet 200A is broken and the balls have moved to the contacts 201b to connect the magnet 200S through a line 205 and cam  contacts CR15 and CL16 to disengage the clutch. The balls then move to engage the contacts 201c  to prepare the transfer circuits. If the units registering member turns from " 9 " to " 0 " the contacts 206 will be engaging the contacts 207 and a circuit will be completed from the line  152 through contacts CR18 the contacts 206, 207 the tens contacts 201c, the balls 202 and the tens magnet 200A to the line 151. The balls then move back to the contacts 201b and circuit is completed from line 152 through contacts CR16, the line 205, contacts 201b, the balls 202 and the magnet 200S to the line 151. Successive transfers are effected by the completion of circuits through the contacts 209, 210 the magnets 200A in parallel through a line 208. Negative amounts .on the cards are identified by a special hole in the "12" position of a predetermined column of the card. The upper brush UB reading this column closes a circuit to energize a relay MCR4. The relay MCR4 opens contacts MCR4b and closes its contacts MCR4c and MCR4d so that when the card passes the lower brushes the magnets 200A are energized by the closure of cam contacts CR14 at the " 9 " position. Each registering member is unclutched when its magnet 200S is energized over a circuit through the related lower brush and hole in the card thereby entering the nines complement. Total taking. The passage of the last card of a group past the lower brushes and of the first card of the next group past the upper brushes opens a control circuit (not shown) and de-energizes relays R5 and R6. When deenergized the relay R5 interrupts card feeding cycles and closes contacts R5f to connect an impulse emitter PE to the line 152. The emitter has lines 178 connected to the read out segments 143 while the plungers 142 are connected through contacts MCR3b of relays MCR3 to print magnets PM. Near the end of the print cycle cam contacts P2 close to energize a relay R3 which closes its contacts to energize the relay MCR3 and to disconnect the impulse emitter PE and connect up the emitter RE. The closure of relay contacts MCR3a connects the plungers 142 to the magnets 200A so that during the second totalling cycle the counter will add the complement of its total thereby leaving the totalizer at zero. At the end of this operation cam contacts CR5 operate to energize relays R5 and R6 and reestablish the control circuit. Pin-box machine. In tabulators in which the cards are read while stationary the pin box 91 is connected by Bowden wires to control pins 88 that co-operate with an actuating member 87. The actuators 231 are mounted on a wheel 223 in mesh with the driving wheel 222 and the ratchet wheel 204 is stationary. The member 87 is restored in every alternate operation by a cam 92 two revolutions of the wheel 223 being necessary one for adding the digits and the other for transfer operations and feeding of the cards. Keyboard machines. A multiple bank machine has columns of keys 93 with contacts 100 to connect the related magnets 200A to contacts 94 which close at the time in the cycle corresponding to the digital value by cams 95 on a shaft 22 driven from a motor 108. The magnets 200S are energized by the closure of contacts 104 and a cam 103 at the "0 " time in the cycle.