System for producing an operating signal

Details System for producing an operating signal System for producing an operating signal

G - Physics

08

B

340/125

G08B 25/00 (2006.01) G07C 1/20 (2006.01) G07C 9/00 (2006.01) G08B 13/00 (2006.01)

Patent

CA 1181152

ABSTRACT OF THE DISCLOSURE In a system for producing an operating signal for, for example, opening a lock in, for example a bank, there are included a central data processor and a terminal carried by a guard. The terminal is provided with a code transmitter including a code which is unique for the unit in question, this code being set to the data processor from the terminal together with a code personal to the guard. If the data processor accepts the received code upon compari- son with stored information, the random signal generator transmits a random code signal to the unit and to the ter- minal. The random code signal is transmitted from the ter- minal to a code receiver in the unit, and the two random code signals received cause the operating signal to be generated.

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