Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1999-03-30
2000-03-07
Paik, Sang
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
2194611, H05B 368
Patent
active
060343583
ABSTRACT:
A radiant electric heater includes a base (2) of insulation material and a lamp-form heating element (3) supported adjacent to a surface of the base. The lamp-form heating element is in the form of a filament (4) inside an elongate envelope (5). The surface of the base (2) is locally depressed (dished or ramped) beneath the envelope (5). A corrugated ribbon heating element (7) is supported on edge relative to the surface of the base (2). A portion of the corrugated ribbon heating element (7) crosses the at least one lamp-form heating element (3) beneath the envelope (5) and substantially conforms to the contour of the locally depressed surface and is free from contact with the envelope (5).
REFERENCES:
patent: 4161648 (1979-07-01), Goessler
patent: 4639579 (1987-01-01), Brooks et al.
patent: 4808798 (1989-02-01), Goessler et al.
patent: 4910387 (1990-03-01), McWilliams
patent: 5204510 (1993-04-01), McWilliams et al.
patent: 5477031 (1995-12-01), McWilliams
patent: 5517002 (1996-05-01), Higgins
patent: 5908571 (1999-06-01), Scott
Search Report Oct. 26, 1998.
Ceramaspeed Limited
Dorman Ira S.
Paik Sang
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