Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1984-08-03
1985-12-10
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219301, 219530, 219540, 338294, H05B 358
Patent
active
045582106
ABSTRACT:
An electric heater comprising a metal casting having an electric heating element of sinuate shape cast therein. The casting has a plurality of ventilation openings therethrough located between the sinuations of the heating element for permitting air to flow directly to the surface on which the heater is mounted for ventilating and cooling it.
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patent: 3676642 (1972-07-01), Rosen et al.
patent: 3849630 (1974-11-01), Halliday
patent: 4254326 (1981-03-01), Wallier et al.
Mayewsky Volodymyr Y.
Watlow Electric Manufacturing Company
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