Electrically controlled, electrically encoded push-button combin

Details Electrically controlled, electrically encoded push-button combin Electrically controlled, electrically encoded push-button combin

1977-12-27

1980-09-02

Wolfe, Robert L.

Locks

Operating mechanism

Using a powered device

361172, E05B 4700

Patent

active

042200229

ABSTRACT:
A plurality of push-button switches are located on a locking structure which also includes an encoding circuit having a specific code set therein requiring operation of the push-buttons in a predetermined sequence. Operation of the first coded button starts an energy timing circuit which provides electrical energy required to permit the lock to open, the energy timing circuit de-energizing the mechanism after a predetermined time so that the electronic decoding circuit automatically blocks the lock unless the proper code was entered within the predetermined time interval, and the appropriate first push-button, providing for energization of the entire system, was first operated. The timing circuit preferably is a capacitor which is charged upon operation of the first push-button, encoded to be first operated and which, if the proper code is punched, provides energy to a solenoid coil which releases a locking element if the proper code permits discharge of the capacitor through the solenoid.

REFERENCES:
patent: 3854310 (1974-12-01), Paull
patent: 3953769 (1976-04-01), Sopko
patent: 4000409 (1976-12-01), Graziosi
patent: 4083424 (1978-04-01), Stemmen
patent: 4093870 (1978-06-01), Epstein

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