Electric resistance heating devices – Heating devices – Convection space heater
Patent
1994-01-18
1997-04-08
Jeffery, John A.
Electric resistance heating devices
Heating devices
Convection space heater
392365, 338294, 338 58, H05B 100, F24H 304
Patent
active
056196121
ABSTRACT:
A motor is located in the air inlet area is enclosed in a shock proof housing. The housing is of a cylindrical configuration, comprising a solid rear wall and a front wall which contains air inlet openings small enough to prevent access to the live electrical parts, the enclosure is further provided with a circumferential air outlet positioned between the front and rear walls. A motor is located in the air inlet area to facilitate its cooling by the entering air. A centrifugal blower impeller is mounted on the blower shaft, with its inlet coinciding with the inlet opening. The impeller is surrounded by a cage shaped heating element consisting of a multitude of inter connected strips of a resistance alloy, which are supported on two plastic rings. The circumferential air outlet is provided with a multitude of guide vanes that help direct and diffuse the air emanating from the heating elements while preventing contact with the heating element from the outside.
REFERENCES:
patent: 1544730 (1925-07-01), Dressler
patent: 1979883 (1934-11-01), Hynes
patent: 2158604 (1939-05-01), Calhoun
patent: 4090061 (1978-05-01), Glucksman
patent: 4694142 (1987-09-01), Glucksman
Deros John A.
Glucksman Dov Z.
Appliance Development Corp.
Jeffery John A.
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