G - Physics – 11 – B
Patent
G - Physics
11
B
58/29
G11B 19/06 (2006.01) G04G 13/00 (2006.01)
Patent
CA 1082469
ABSTRACT OF THE DISCLOSURE A first contact arm on the minute shaft of a clock- work switches, once every 30 minutes, the mode of energization of an electronic gating circuit with two sectlons in the inputs of an inverting anticoincidence (NOXOR) gate working into a set- ting input of a flip-flop which controls the driving circuit of a striking mechanism, each section having two parallel branches of relatively inverting character and with a relative phase de- lay whereby any switchover results in a brief de-energlzation of that setting input and thus in a setting of the flip-flop. A pulse generator, included in or energized by the driving cir- cuit, works into a stepping input of a binary pulse counter pro- vided with four output leads whose pattern of enerqization re- presents the numerical values from 1 through 12. A logic net- work, connected to a resetting input of the flip-flop and to a clearing input of the pulse counter, discriminates between switch- overs at the full hour and at the half-hour in response to the state of energization of the gating circuit; on the half-hour, the flip-flop is reset and the pulse counter is cleared upon the energization of the No. 1 output lead of the counter, whereas on the full hour these events take place under the control of a second contact arm carried on the hour shaft of the clockwork whenever the pulse count matches the position of that contact arm.
273686
Kieninger & Obergfell
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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