Pressurized fluid circuits

Details Pressurized fluid circuits Pressurized fluid circuits

1978-04-10

1981-01-20

Goldberg, Gerald

Signals and indicators

Alarms

Fluid-pressure variation

116271, G01L 1912, G01L 1910

Patent

active

042455790

ABSTRACT:
Pressurized fluid circuits are provided which are suitable for use in a pressure drop detector for a pressurized fluid fire alarm system. The pressurized fluid circuits are provided as channels in the surface of a block of material and include one channel connected to a source of fluid pressure. The channels are associated with valve regions by means of which, with a diaphragm pressed thereagainst, a required one or more of the channels can be closed off.
In its application to a pressure drop detector a normally pressurized region of the diaphragm may support a mechanical linkage of the detector such that if the pressure drops, on release of pressure in the system, the collapsing of the diaphragm allows the mechanical linkage to be released thus actuating a fire alarm.

REFERENCES:
patent: 479709 (1892-07-01), Goldstein
patent: 3027746 (1962-04-01), Kappel
patent: 3209721 (1965-10-01), Pall
patent: 3991788 (1976-11-01), Kull
patent: 3999437 (1976-12-01), Lepine

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