Fire extinguishing system

Details Fire extinguishing system Fire extinguishing system

1979-02-05

1981-09-15

Spar, Robert J.

Fire extinguishers

Portable vessels

73708, A62C 1100

Patent

active

042892074

ABSTRACT:
In a fire extinguishing system including a pressure vessel (10) filled with a non-solid fire extinguishing material (12) having a vapor pressure that fluctuates with temperature, a controllable outlet (14, 16, 18) for the vessel, and a pressure sensing device (20) for monitoring the pressure in the vessel, the improvement wherein the pressure sensing device includes a differential pressure sensing device (20) having two input ports (22, 24) one of the ports (22) being in fluid communication with the interior or the pressure vessel, and a sealed second vessel (26) in sufficiently close proximity to the pressure vessel so as to be exposed to the same ambient temperature as the pressure vessel and filled with fire extinguishing material (28) substantially to a desired fill density, the other of the ports (24) being in communication with the interior of the second vessel (26). The system is self compensating for widely varying temperatures which affect the pressures exerted by the fire extinguishing material (12, 28) so that an accurate indication of the charged condition of the extinguisher is provided regardless of temperature.

REFERENCES:
patent: 1629063 (1927-05-01), Berry
patent: 2690079 (1954-09-01), Morschel
patent: 2866339 (1958-12-01), Rhodes et al.
patent: 3045761 (1962-07-01), Ciarlo
patent: 3675722 (1972-07-01), Balmes, Sr.
patent: 3728899 (1973-04-01), Dijkema
patent: 3850039 (1974-11-01), Brakebill

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