Inventors:
Riley M. Sopko - Glendale CA
Assignee:
Sargent & Greenleaf, Inc. - Rochester NY
International Classification:
E05B 4900
Abstract:
Actuation of an electrically operated lock is controlled by an electronic permutation circuit including an array of code entry push-button switches disposed for operation at the entrance to a secured area and a plurality of code selector switches mounted inside the secured area for setting a predetermined code sequence. If the correct code sequence is entered, corresponding to the setting of the code selector switches, an electronic counter is sequentially advanced to a selected terminal state determined by a code length selector switch which is connected to and for operating the electrically controlled lock. The time interval during which the lock is electrically actuated may be selected by a latch time selector switch mounted along with the code selector switches inside the secured area. The occurence of a preselected number of errors during code entry, a number which may be set by a selector switch mounted along with the other selector switches, provides for activating a penalty period during which the entire system is disabled and inoperable. The duration of the penalty time may also be varied by another selector switch.