Fire extinguishers – Sprinkler heads
Patent
1988-09-26
1990-01-30
Peters, Jr., Joseph F.
Fire extinguishers
Sprinkler heads
169 26, 169 38, A62C 3708
Patent
active
048967289
ABSTRACT:
A fire sprinkler has a flow passage for water or other extinguishing fluid closed by a frangible body, which may be a simple disc. A separate mechanism responsive to temperature-rise conditions shatters the frangible body, and the fluid then flows from the passage to impinge on a distributor (as in conventional sprinklers). The shattering mechanism is preferably actuated by a shape-memory alloy, preferably in sheet form, which can be located below the distributor for maximum exposure to radiant as well as convective heat; it can also be thermally insulated, contributing further to speed of response.
REFERENCES:
patent: 2441011 (1948-05-01), Dodelin
patent: 3547201 (1970-12-01), Balmes
patent: 3834463 (1974-09-01), Allard et al.
patent: 4006780 (1977-02-01), Zehr
patent: 4282931 (1981-08-01), Golber
Edwin Waldbusser, the Use of Shape and Memory Alloys to Improve Semi-Conductor Industry Fire Safety, Journal of the Semi-Conductor Safety Association Aug. 1987, pp. 34-35.
Battelle Memorial Institute Final Report on Development of a Nitinol-Actuated Fire Sprinkler Disclosed to Federal Emergency Management Agency Sept. 15, 1982.
Hawes David W.
Wolff Heinz S.
Peters Jr. Joseph F.
Sartelle Anne
Thomas Bolton & Johnson Limited
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