Alarm device

Details Alarm device Alarm device

1980-01-28

1982-01-19

Scott, James R.

Electricity: circuit makers and breakers

Special application

200 6193, 200 86R, 340565, H01H 3500

Patent

active

043118895

ABSTRACT:
An alarm device including an alarm switch mounted on the structure of a building that carries walking surfaces such as a floor joist. A switch is actuated upon structural deflection associated with imposition of predetermined amount of weight at the area of the switch as when a person is walking thereon. The deflection of the structure causes relative movement between an electrical contact and an electrically conductive taut wire to energize a circuit which can give an alarm or other indication.

REFERENCES:
patent: 732813 (1903-07-01), Arnold
patent: 940535 (1909-11-01), Korbel
patent: 1034223 (1912-07-01), Erickson
patent: 1101999 (1914-06-01), Clark
patent: 1660070 (1928-02-01), Crane
patent: 1928472 (1933-09-01), Wilcox
patent: 2173089 (1939-09-01), Geer
patent: 2243911 (1941-06-01), Lakatos
patent: 2547214 (1951-04-01), Jones et al.
patent: 2551754 (1951-05-01), Meredith
patent: 2683784 (1954-07-01), Rector
patent: 2761038 (1956-08-01), Bruns
patent: 2779583 (1957-01-01), Bine
patent: 2794089 (1957-05-01), Hogg et al.
patent: 3207870 (1965-09-01), Herrera et al.
patent: 3588416 (1971-06-01), Millam
patent: 3596024 (1971-07-01), Smith

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