Detector cylinder

Details Detector cylinder Detector cylinder

1974-12-30

1976-07-06

Wolfe, Robert L.

Locks

Parts, attachments, accessories and adjuncts

70419, 70378, E05B 1700

Patent

active

039674819

ABSTRACT:
A detector cylinder is used in a door lock and includes a cylinder body having a plug bore therein and having one or more pin bores in the body opening into the plug bore. A plug is rotatable in the plug bore and has a keyway and one or more pin openings communicating with the keyway and in one rotated position of the plug also communicating with the pin bore or bores. There are one or more first pins slidable in the pin bores and one or more second pins slidable in the pin openings. A spring or springs are disposed to urge the pins towards the keyway. An electrically conducting contact is disposed on the cylinder body in position to be abutted by a first pin in one of the longitudinal locations of the first pin. There is an electrical circuit that is completed when the first pin abuts the contact. The circuit may include an alarm and a switch for preventing an alarm.

REFERENCES:
patent: 2057301 (1936-10-01), Gdokow
patent: 2095819 (1937-10-01), Lefebure
patent: 3724245 (1973-04-01), Kitchen
patent: 3797004 (1974-03-01), Muessel
patent: 3801775 (1974-04-01), Schlage

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