Locks – Operating mechanism – Using a powered device
Patent
1997-06-12
1999-03-16
Boucher, Darnell M.
Locks
Operating mechanism
Using a powered device
70283, 70303A, 70333R, E05B 4902
Patent
active
058815899
ABSTRACT:
A gear driven bolt withdrawal mechanism for an electronic lock is disclosed wherein an electromagnetic device such as an electromagnetic device displaces a partial gear into a position to be engaged by a manual drive. The partial gear, in turn, drives subsequent gears in a gear train to engage a gear with teeth on a rack attached to or a part of the bolt of the lock. The restoration of the bolt is ensured by a physical engagement between a portion of the drive cam and a portion of the bolt to force the bolt to its extended position upon locking; a displaceable slide is disposed in blocking relationship to the bolt whenever the bolt is fully extended to prevent end pressure from displacing the bolt without entry of a valid combination into the electronic controls of the lock.
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Clark Thomas R.
Dawson Gerald L.
Evans Walter R.
Redden James P.
Boucher Darnell M.
Letson Laurence R.
Mas-Hamilton Group
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