E - Fixed Constructions – 05 – B
Patent
E - Fixed Constructions
05
B
70/3
E05B 37/08 (2006.01) E05B 47/06 (2006.01)
Patent
CA 1282607
COMBINATION/ELECTRONIC LOCK SYSTEM ABSTRACT A lock mechanism having a mechanical combination lock and an electronic lock, wherein the mechanical combination lock serves for effecting a fail safe entry in case of failure of the electronic lock. More specifically, the lock mechanism includes a mechanical combination lock having a bolt-retracting linkage which is tripped by inward movement of a dial into a first operative relationship with a driver on the drive spindle. An electronic latch prevents bolt retraction by this bolt-retracting linkage when in the first operative position until the electronic latch has been operated. However, when the tumblers of the lock have been aligned and a gate bar enters the tumblers, the bolt-retraction linkage is caused to assume a second operative relationship with the driver so as to permit bolt retraction despite the latching effect of the electronic lock.
534102
Oyen Wiggs Green & Mutala Llp
Slc Technologies Inc.
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