Water alarm switch

Details Water alarm switch Water alarm switch

1975-05-22

1977-01-04

Scott, James R.

Electricity: circuit makers and breakers

Special application

Liquid or moisture responsive

H01H 2900

Patent

active

040015319

ABSTRACT:
A water alarm switch having a water-soluble element arranged abutting a support frame on which an elongated member is slidably mounted. The elongated member is anchored on the water-soluble element and cooperates with a spring arranged abutting the frame for biasing the water-soluble element against the frame and retaining the elongated member in a switch-open position. The dissolving of the water-soluble element due to contact with water, and the like, releases the elongated member and permits same to move under the bias of the spring so as to bring electrically connected contacts affixed to the elongated member into contact with mating contacts affixed to the frame and close both the switch and external alarm circuit connected to the contacts affixed on the frame.

REFERENCES:
patent: 539234 (1895-05-01), Neu
patent: 664331 (1900-12-01), Martin
patent: 1095382 (1914-05-01), Clorius et al.
patent: 1106151 (1914-08-01), Matthews
patent: 1122032 (1914-12-01), Scheuer
patent: 1159602 (1915-11-01), Scheuer
patent: 2094825 (1937-10-01), Sarcione
patent: 3169724 (1965-02-01), Perkins
patent: 3311721 (1967-03-01), Wright
patent: 3787650 (1974-01-01), Lewis

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