Alarm switch mechanism for axial pin tumbler locks

Details Alarm switch mechanism for axial pin tumbler locks Alarm switch mechanism for axial pin tumbler locks

1980-08-06

1982-05-11

Wolfe, Robert L.

Locks

Operating mechanism

Key

70441, 70DIG49, E05B 2708

Patent

active

043286917

ABSTRACT:
An axial pin tumbler type lock with alarm triggering capability upon an attempt at picking by stemmed locking pins which will close a circuit through a contact element wherein the contact element is seated against the rear of the stationary sleeve which is of insulating material, the contact element having openings therein which allow the pin stems to pass through and beyond the contact element, and an insulating ring which is fixed to and rotatable with the spindle, the insulating ring being also made of insulating material and having a plurality of bores that can receive the pin stems thereby preventing the application of the requisite torque to defeat the lock by picking.

REFERENCES:
patent: 3878700 (1975-04-01), Lopez
patent: 3903720 (1975-09-01), Scherbing
patent: 3986376 (1976-10-01), Lack
patent: 4078405 (1978-03-01), Steinbach
patent: 4147905 (1979-04-01), Scherbing

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