Stoves and furnaces – Stoves – Heating
Patent
1991-08-01
1992-11-17
Chambers, A. Michael
Stoves and furnaces
Stoves
Heating
432147, 432175, F24C 304
Patent
active
051634163
ABSTRACT:
A standard atmosphere furnace constructed of a steel casing formed as a cylinder with fibrous insulation attached is operated as a vacuum furnace. A plurality of radiant, fuel-fired ceramic heat tubes positioned in a centered but circumferentially spaced arrangement provides heat input to the furnace to permit it to operate at high, vacuum associated temperatures. The ceramic tubes are vacuum sealed to the furnace case by an elastomer seal/water jacket arrangement which uses an outboard clamp arrangement to establish a ceramic-to-metal contact to permit thermal cooling and prevent tube-flange movement so that the integrity of the elastomer seal can be maintained. In addition, an articulated joint connector is provided so that the tube can be supported in a pivotable manner permitting thermal movement while reducing tube stress to prolonged tube life.
REFERENCES:
patent: 3425675 (1969-02-01), Twine
patent: 4400152 (1983-08-01), Craig et al.
patent: 4802844 (1989-02-01), Kuhn et al.
patent: 4963091 (1990-10-01), Hoetzl et al.
patent: 5074782 (1991-12-01), Hoetzl et al.
GRI-88/0159; Table of Contents, List of Tables, Appendices, pp. 38-43, 58-68, 72-77.
Kuhn Timothy J.
Schultz Thomas J.
Chambers A. Michael
Gas Research Institute
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