Apparatus for the prevention or limitation of water damage

Details Apparatus for the prevention or limitation of water damage Apparatus for the prevention or limitation of water damage

1979-06-18

1981-01-27

Yuen, Henry C.

Heating systems

Automatic control

Water

237 8A, 137312, 4427, 236 68B, H01H 3500, F24D 300

Patent

active

RE0304930

ABSTRACT:
The invention relates to an apparatus for preventing or limiting water damage caused by leakage from pipes or appliances in which a sensing element in the form of a pair of conductors having current applied thereto is positioned in an area to sense accumulation of water from leakage. The sensing element is connected to a resettable relay to operate the same when current flows between conductors of the sensing element. The relay is bi-stable and resettable and operates to disconnect the sensing element after initial conduction and to further apply heat through the heating element to a thermostatic valve to operate the thermostatic valve in a direction to close off water flow to piping or apparatus in which leakage occurs.

REFERENCES:
patent: 2538221 (1951-01-01), Wilber
patent: 3770002 (1973-11-01), Brown
patent: 3818874 (1974-06-01), Tria
patent: 3920031 (1975-11-01), Maxfield
patent: 3943983 (1976-03-01), Gelfand
patent: 3945564 (1976-03-01), Smallegan
patent: 4041557 (1977-08-01), Ringler

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