Heat transfer sleeve for chemical heaters

Details Heat transfer sleeve for chemical heaters Heat transfer sleeve for chemical heaters

1975-06-16

1977-07-05

Camby, John J.

Stoves and furnaces

Heaters

Chemical

126390, F24J 102

Patent

active

040333230

ABSTRACT:
A self-contained heating device useful for a variety of heating applications is disclosed. In a preferred form the device comprises a hermetically sealed cartridge, containing a chemical mixture which produces heat but substantially no gas upon ignition, disposed in a heating unit which also includes a means for igniting the cartridge and a heat transfer sleeve surrounding the cartridge. The sleeve is constructed for optimizing heat transfer from the cartridge and includes in one embodiment a plurality of internal ridges which support the cartridge and define, together with the cartridge and the body of the sleeve, a plurality of air spaces. In a second embodiment a tubular aluminum oxide liner is provided for the sleeve and in still a third embodiment a coated or uncoated screen liner. These sleeve designs retard the rate of heat conduction from the cartridge to the sleeve body, reduce the external temperature of the sleeve and eliminate local hot spots on the sleeve which could cause burning or scorching of the substance being heated.

REFERENCES:
patent: 1060265 (1913-04-01), Lamb
patent: 2589509 (1952-03-01), Petragua
patent: 2624332 (1953-01-01), Lang
patent: 2935549 (1960-05-01), Woods
patent: 3564308 (1971-02-01), Ryan

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