Ignition system for chemical heaters

Details Ignition system for chemical heaters Ignition system for chemical heaters

1975-03-26

1977-03-22

Camby, John J.

Stoves and furnaces

Heaters

Chemical

44 40, 149 15, F24J 102

Patent

active

040130614

ABSTRACT:
A self-contained heating device useful for a variety of heating applications is disclosed. In a preferred form of the invention a hermetically-sealed cartridge containing a chemical mixture which produces heat, but substantially no gas, upon ignition is disposed in a heating unit which also includes a means for igniting the cartridge and a heat transfer sleeve surrounding the cartridge. Preferably, the chemical mixture comprises an alumino-thermic mixture and the igniting means is a percussion primer cap. To increase the percentage of successful ignitions in such a device, a cone-shaped depression is formed in the alumino-thermic reactive mixture adjacent the percussion cap, which depression is preferably filled with a ignition mixture of finely divided aluminum and Fe.sub.2 O.sub.3 or Fe.sub.3 O.sub.4.

REFERENCES:
patent: 1573872 (1926-02-01), Schwartz
patent: 2953443 (1960-09-01), Lloyd
patent: 3160537 (1964-12-01), Trafton, Jr.
patent: 3874365 (1974-07-01), Pava

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