Radiant electric heaters

Details Radiant electric heaters Radiant electric heaters

1991-07-03

1993-04-20

Walberg, Teresa J.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219467, 219466, 219465, H05B 374

Patent

active

052045102

ABSTRACT:
A radiant electric heater (10) includes a layer of microporous thermal insulation (16) in a metal dish (12) and a peripheral wall (18) of ceramic fibre. A circular tungsten-halogen heating lamp (22) is supported in the dish above the insulation by its ends and by a protrusion (46) extending from the silica envelope (26) of the lamp. The protrusion extends sideways and is clamped between the insulation and the peripheral wall, and comprises a sealed exhaust tube used to evacuate and back-fill the lamp during its manufacture. Downwardly extending protrusions (120, 718) may be used instead of or in addition to sideways ones. A ridge (48) of the insulating material may also be provided, projecting up to engage with the underside of the lamp. This ridge may cooperate with the protrusion or with a clip (614) extending above the lamp to retain the lamp in position.

REFERENCES:
patent: 1267287 (1918-05-01), Silverman
patent: 1444400 (1923-02-01), Silverman
patent: 2278951 (1942-04-01), Smith
patent: 3833793 (1974-09-01), McWilliams
patent: 4243874 (1981-01-01), Fischer
patent: 4296311 (1981-10-01), Hagglund et al.
patent: 4700051 (1987-10-01), Goessler
patent: 4727241 (1988-02-01), McWilliams
patent: 4789772 (1988-12-01), McWilliams
patent: 4845340 (1989-07-01), Goessler
patent: 4910387 (1990-03-01), McWilliams

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