Fire extinguishing sprinkler valve

Details Fire extinguishing sprinkler valve Fire extinguishing sprinkler valve

1985-07-29

1986-05-27

Tapolcai, William E.

Fire extinguishers

Sprinkler heads

236 88, G05D 2326

Patent

active

045909997

ABSTRACT:
A thermal responsive valve having a temperature sensitive magnetic material for operating a valve in response to temperature variations. A valve is held closed by magnetic forces from mutually attractive magnetic means. One or more of the magnetic means are formed of materials that have strong magnetic properties producing magnetic forces which vary according to temperature. The magnetic materials are selected to provide a design temperature which when reached abruptly causes the material to lose its magnetic properties (permeability) becoming magnetically inert opening the valve. When the materials cools to the design temperature and below it abruptly retains its magnetic properties and will close the valve.

REFERENCES:
patent: 2232502 (1941-02-01), Wittmann
patent: 2233659 (1941-03-01), Wittmann
patent: 2339087 (1944-01-01), Mantz
patent: 2390985 (1945-12-01), Boyer
patent: 2601579 (1952-06-01), Wittman
patent: 2678774 (1954-05-01), Arvin
patent: 2688446 (1954-09-01), Wittmann
patent: 4361275 (1982-11-01), Mori

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