Locks – Operating mechanism – Using a powered device
Patent
1990-02-07
1992-03-10
Wolfe, Robert L.
Locks
Operating mechanism
Using a powered device
70215, E05B 4700
Patent
active
050940937
ABSTRACT:
An electronic, code-operable lock attachment, having a shank adapted to fit, and be fixedly attached to, a standard mortise lock, and having a flange-like rim portion, a housing fixedly attachable to the rim portion of the shank, an actuating shaft passing in an axial direction through the housing and the shank, a bolt-operating arm fixedly mounted on one end of the shaft and adapted, in the mounted state of the electronic lock attachment, to engage the bolt of the mortise lock. The lock attachment also includes a handle fixedly attached to the second end of the shaft. There is also included an electromagnet mounted inside the shank and having a plunger passing through a first hole, being located in the shank, and through a second hole, being located in the bolt-operating arm and retractable, in the excited state, at least from the second hole, the first hole and the second hole being substantially aligned when the lock is in the locked state, and an electronic circuit adapted to activate the electromagnet when enabled by at least the insertion, into the lock attachment, of a code-carrying key.
REFERENCES:
patent: 3995460 (1976-12-01), Sedley
patent: 4603564 (1986-08-01), Kleinhany
patent: 4761976 (1988-08-01), Kleinhany
patent: 4901545 (1990-02-01), Bacon
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