Safes – bank protection – or a related device – Wall and panel structures – closures and closure adjuncts – With closure fastening means
Patent
1985-04-15
1987-08-18
Ridgill, Jr., James L.
Safes, bank protection, or a related device
Wall and panel structures, closures and closure adjuncts
With closure fastening means
E05G 104, E05B 4900
Patent
active
046869123
ABSTRACT:
The electronically controlled locking apparatus is used with a door such as a safe door, and enables the door to be released by either a mechanical combination lock or an electrical lock control circuit. The control circuit generates an output signal when a correct access code is entered by a user for causing a control linkage to release the door. Alternatively, the mechanical lock can also cause the control linkage to release the door by authorized personnel, in the event of either a control circuit malfunction, or the authorized user being unable to recall the access code. The circuit includes both a non-volatile and a volatile memory means for storing the access code, and a display device for providing a visual indication of the correct code within the protected area, so that the door can be unlocked with the mechanical lock, and then the access code for the electrical lock circuit can be viewed at the protected side of the door.
REFERENCES:
patent: 2953689 (1960-09-01), Becker
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patent: 3926021 (1975-12-01), Genest et al.
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patent: 4534194 (1985-08-01), Aydin
Fogleman H. Frank
Parrish Randall E.
Kleinke Bernard L.
Ridgill, Jr. James L.
The Protech Partnership
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