Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1984-11-29
1987-09-15
Goldberg, E. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219369, 219373, F24H 700
Patent
active
046941428
ABSTRACT:
An electric forced-convection air heater consisting of an axial fan and a cage-shaped resistance heating element mounted up-stream of the fan impeller, which serves to heat the air passing there through and to guide the air stream smoothly to the impeller. The cage shaped resistance heating element comprises a plurality of spaced longitudinal strips of uniform width, extending parallel to the axis of the cage; the surface of each strip is inclined to the ideal cylindrical surface of the cage and is curved perpendicular to its long axis. The alternate ends of the adjacent strips are jointed by bridging portions of the same material, but of larger cross section. Each bridging portion is perforated by a small opening. The cage is rigidly held in its cylindrical shape by two end rings of a thermoplastic material, provided with outstanding lugs on their circumference, one lug each engaging with one of the openings in the bridging portion atop each end of the cage.
REFERENCES:
patent: 2011856 (1935-08-01), Harrison et al.
patent: 2221703 (1940-11-01), Falco
patent: 3807495 (1974-04-01), Skarecky
patent: 4034204 (1977-07-01), Windsor et al.
patent: 4090061 (1978-05-01), Glucksman
Goldberg E. A.
Lateef M. M.
Roberts, Jr. John S.
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