Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1990-09-11
1991-12-10
Walberg, Teresa J.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
F27B 514, F27D 1100
Patent
active
050720945
ABSTRACT:
A vermiculite insulated tube furnace is heated by a helically-wound resistance wire positioned within a helical groove on the surface of a ceramic cylinder, that in turn is surroundingly disposed about a doubly slotted stainless steel cylindrical liner. For uniform heating, the pitch of the helix is of shorter length over the two end portions of the ceramic cylinder. The furnace is of large volume, provides uniform temperature, offers an extremely precise programmed heating capability, features very rapid cool-down, and has a modest electrical power requirement.
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Bowen David W.
Foster Kenneth G.
Frohwein Eugene J.
Taylor Robert W.
Carnahan L. E.
Moser William R.
Sartorio Henry P.
To Tuan Vinh
United States Department of Energy
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