Fluid drip detector

Details Fluid drip detector Fluid drip detector

1995-06-08

1997-04-01

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 40, 73 405R, 340605, 324 711, 137312, G08B 2100, G01N 2700

Patent

active

056168306

ABSTRACT:
An electric resistance measuring device situated in fluids, comprising; a housing having a bore therethrough, the bore having a seat; a movable door means situated in the bore, engagable with the seat; whereby, fluid movement disengages the door from the seat, changing the electrical resistance between the seat and the door. Such a device can detect leaks which increase the electrical resistance between the seat and the door. A panel provides selector means which can be set at different modes, each mode providing a different period of time in which fluid can be used continuously without interruption. If fluid movement exists after such period, a cut off valve will shut off the fluid. Such a device can be installed in line with fire sprinklers, such that the device will detect a fire and will send a signal to a central station.

REFERENCES:
patent: 4549134 (1985-10-01), Weiss
patent: 4724479 (1988-02-01), Schmalfuss et al.
patent: 4796658 (1989-01-01), Caple
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patent: 4994749 (1991-02-01), Davies et al.
patent: 5040409 (1991-08-01), Kiewit
patent: 5091715 (1992-02-01), Murphy
patent: 5214387 (1993-05-01), Fenner
patent: 5246067 (1993-09-01), Heinonen et al.
patent: 5381097 (1995-01-01), Takatori et al.
patent: 5463377 (1995-10-01), Kronberg

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