Coded solid state entry device

Details Coded solid state entry device Coded solid state entry device

E - Fixed Constructions

05

B

340/125, 70/3, 3

E05B 47/00 (2006.01)

Patent

CA 1176725

CODED SOLID STATE ENTRY DEVICE ABSTRACT OF THE DISCLOSURE - A coded key operated solid state entry system for a controlled access to a multiplicity of electronic circuits by the use of corresponding coded keys embodying a detection and monitoring system, the detection and monitor system being activated by the insertion into the keyway of a coded key particularly adapted to successively engage a plurality of switches which engage a timer for a timed interval of key insertion and which energizes a circuit to unlatch normally latched tumblers and which upon rotation by the key to the extent of the code of the key, an optic coupling circuit is energized and the code of the tumblers is read, the optic coupler interfaces with a comparator which functions to match the code read with a corresponding coded electronic circuit. If the code is not matched with a corresponding circuit, the timed interval of the timer will expire and the circuit unlatching the tumblers will be caused to become de-energized locking up the tumblers and the key. If the code is matched to a circuit, the timer circuit is re-set for another interval of time for the return of the tumblers of their initial position, for the withdrawal of the key, access to the corresponding circuit having been achieved by the matchup.

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