E - Fixed Constructions – 05 – B
Patent
E - Fixed Constructions
05
B
70/2
E05B 27/08 (2006.01) E05B 45/10 (2006.01)
Patent
CA 1039526
ABSTRACT OF THE DISCLOSURE Alarm switch mechanism for an axial split-pin tumbler- type lock includes an electrical contact member disposed in the lock cylinder in the movement paths of lock tumbler elements and adapted for making an electrical contact with an element of any of the tumblers which is moved rearwardly or inwardly a predetermined distance, beyond the distance required for lock-opening purposes, means electrically insulating the contact member from the lock mechanism when no tumbler is in the latter position, and means adapted for making electrical connections to the tumbler elements and the contact member, respectively, whereby they may be connected in an alarm signal circuit closed by making said contact.
274226
Chicago Lock Co.
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