Locks – Operating mechanism – Using a powered device
Patent
1992-03-16
1993-12-21
Cuomo, Peter M.
Locks
Operating mechanism
Using a powered device
70333R, 70 17, 70150, 2922515, E05B 4700
Patent
active
052712532
ABSTRACT:
To prevent the opening of an electronic combination lock by using a strong magnet to operate a stepper motor, a magnetic interlock is included in the lock structure. A magnetic pin is held in a retracted position by a small magnet when a strong attack magnet is positioned to attempt to open the lock, the magnetic pin is attracted from the holding magnet and extended to bridge the bolt and lock housing, blocking the retraction of the bolt.
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Cassada Thomas E.
Dawson Gerald L.
Boucher Darnell M.
Cuomo Peter M.
Letson Laurence R.
Mas-Hamilton Group
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