Window operator with switch to operate a burglar alarm

Details Window operator with switch to operate a burglar alarm Window operator with switch to operate a burglar alarm

1980-09-22

1982-08-24

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

49 14, 200 6162, 200 6193, 340541, G08B 1308

Patent

active

043463720

ABSTRACT:
A conventional roto-gear window operator for a casement or awning window, or the like, is provided with an alarm switch. The alarm switch consists of a conductive wire which is connected to a remote alarm package and is insulated from the base of the operator. One end of the wire is fixedly held adjacent to the helix of the operator worm gear so as to provide intermittent wiping contact when the worm gear is rotated. The worm gear is electrically conductive and, through the operator base, is connected to a lead wire which also extends to the alarm package. Accordingly, rotation of the worm gear (to actuate the operator) opens and closes the switch by engagement and disengagement of the wire with the worm gear helix, generating a sequence of pulses which triggers the alarm package.

REFERENCES:
patent: 1158729 (1915-11-01), Scholl
patent: 1208129 (1916-12-01), Fuller
patent: 1269542 (1918-06-01), McNabb et al.
patent: 2086800 (1937-07-01), Harris
patent: 2521858 (1950-09-01), Levy
patent: 2773995 (1956-12-01), Griswold
patent: 3330922 (1967-07-01), Rowe
patent: 3401578 (1968-09-01), Korber
patent: 3713128 (1973-01-01), Wong et al.
patent: 3925773 (1975-12-01), Green
patent: 3979740 (1976-09-01), Forbat et al.
patent: 4005397 (1977-01-01), Blair
patent: 4271338 (1981-06-01), Rakocy

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