Self-destruct electrical interlock for cylinder lock and key set

Details Self-destruct electrical interlock for cylinder lock and key set Self-destruct electrical interlock for cylinder lock and key set

1991-08-20

1993-02-16

Gall, Lloyd A.

Locks

Operating mechanism

Using a powered device

70278, 70371, 70422, 70495, 200 4308, E05B 4700, E05B 6300

Patent

active

051860317

ABSTRACT:
A cylindrical lock and key set with an electronic interlock circuit includes a self-destruct circuit portion which is intercepted, engaged and destructed by an intercept member when the cylinder is forcibly, axially removed from the lock sleeve. A second intercept member may engage the circuit and destruct it when the cylinder is forcibly rotated. Either or both of the intercept members may be located on the cylinder.

REFERENCES:
patent: 3402582 (1968-09-01), Jacobi
patent: 3442102 (1969-05-01), Butts
patent: 3651329 (1972-03-01), Marlowe et al.
patent: 3794796 (1974-02-01), Dwan
patent: 4074547 (1978-02-01), Seidewand
patent: 4074548 (1978-02-01), Milton
patent: 4454736 (1984-06-01), Mochida
patent: 4458512 (1984-07-01), Gelhard
patent: 4630457 (1986-12-01), Kincaid et al.
patent: 4737762 (1988-04-01), Ohnishi

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