Patent GB-865571-A (GB)
Title: Improvements relating to electric pulse totalizing arrangements
IPC: G06M1/10
Filed: 1958-03-24
Abstract: 865,571. Digital electric calculating-apparatus; transfer mechanisms. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd., FLEET, A. D., and MILLER, G. D. June 24, 1959 [March 24, 1958], No. 9278/58. Class 106 (1). In a device which may be used to register the number of vehicles in a plurality of railway sidings, an accumulator is provided for each siding, the accumulators comprising a plurality of number wheels, each number wheel being capable of being driven electromagnetically in an additive or a subtractive direction. A number to be entered is set up on keys and means are provided for selecting the accumulator in which the number is to be entered. As described, there are fifty sidings and associated accumulators, numbered 00 to 49, each accumulator comprising a units number wheel and a tens number wheel. The adding and subtracting windings for the units and tens orders, 21UAZ, 21USZ, 21TAZ, 21TSZ, for the accumulator number 21 are shown in Fig. 1. Two selector switches OMA, OMS having a plurality of banks of fifty contacts in two alternately-scanned groups of twenty-five contacts are provided for controlling the accumulators. Numbers may be entered into the accumulators by means of " cut buttons " 1CN-7CN, Fig. 3, when from one to seven railway vehicles in a " cut " are to be routed to a siding, and also by " manual buttons " comprising decimal units and tens orders, the manual buttons 1MN-9MN, 10MN- 90MN being shown in Fig. 3. The buttons, when depressed, are mechanically held until released automatically at the end of the addition or subtraction operation or manually by a cancel and reset button. Numbers are normally entered by the " cut buttons " 1CN-7CN, manual entry by the buttons MN being controlled by relays MCR, ASCR (Fig. 6, not shown), energization of the relay MCR controlling addition and energization of both relays MCR, ASCR together controlling subtraction. Accumulator selection.-Energization by a manual button of a selected one of fifty relays 00UR-49UR (Fig. 2, not shown) closes corresponding contacts among the contacts 00UR1- 49UR1, 00UR2-49UR2, Fig. 10, the additive or subtractive selector switch banks OMA(g)- OMA(k), OMS(g)-OMS(k) being scanned until the position corresponding to the selected accumulator is reached, when a circuit to a relay CFR is completed. Manual selection may be effected by adjusting a tens selector switch TMN and a units selector switch UMN, Fig. 10. Depression of an accumulator selection key and one or more number entry keys closes a circuit to the appropriate operating magnet OMA or OMS (Fig. 9, not shown) to cause the corresponding selector switch to step, this circuit being broken on energization of the relay CFR. Entering n 7 embers.-For manual operation, two accumulation cycles are required, for the units and tens digits respectively, but for automatic operation, using the " cut buttons " 1CN-7CN, a tens cycle is unnecessary. When a route to the selected accumulator has been prepared as described above, a circuit to the operating magnet OM, Fig. 5, of a selector switch of which the bank OM(c) is shown in Fig. 1, is completed, and the switch OM steps to successively energize briefly a relay UCR, Fig. 1, whose impulsing contact UCR1 supplies pulses over the appropriate selector switch OMA, OMS for addition or subtraction to the appropriate winding of the units wheel of the selected accumulator. The number of pulses supplied is equal to the digit being entered, the supply of further pulses being inhibited by the attainment of a marked contact 2-8 on the banks OM (b) of the uniselector OM and the consequent energization of a stop relay SR which completes a homing circuit for the uniselector OM and opens a contact SR5 in the pulse supply circuit, Fig. 1. The relay SR also causes energization of a relay TUCR (Fig. 9, not shown) to initiate a tens cycle, the entered tens digit energizing an associated relay 1PR-9PR, Fig. 3, when the contacts TUCR1 change over. The uniselector OM then steps as for the units cycle, but the units relay UCR is disabled by an open-contact TUCR5, pulses for energizing a tens relay TCR being supplied over the even-numbered contacts 2-18 of the selector switch bank OM(c). The stop relay SR is energized as for the tens cycle, and causes the apparatus to return to its initial condition. The units or tens cycle is omitted if the corresponding digit to be entered is zero. Tens transfer.-The units wheel of each counting device has associated with it a pair of adding transfer contacts OC closed when the wheel registers 0 and a pair of subtracting transfer contacts 9C, closed when the wheel registers 9, these contacts being connected, over banks of the uniselector switches OMA, OMS, to the tens relay TCR. Thus, for example, for adding, when the units wheel reaches the zero position, a circuit is complete to energize the relay TCR and add unity into the tens denomination.