Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1978-10-25
1980-09-02
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219217, 219345, 219527, 219549, H05B 334
Patent
active
042208483
ABSTRACT:
A soft, resilient and flexible blanket type electric resistance heater comprising a sheath including top and bottom panels of thin, supple, flexible and elastic sheet material and substantially similar in plan configuration; an elongate, flexible electric resistance element having greater tensile strength than the sheath is loosely arranged in a slack serpentine pattern between and throughout the plane of the panels with adjacent portions in variable spaced relationship from each other; the edge portions of the panels are fixed together about their perimeters; the panels are fixed together at locations between and spaced from adjacent related portions of the element to maintain adjacent portions of the element in spaced relationship from each other; the air in the space between the panels is exhausted therefrom to reduce the presence of heat insulating dead air spaces between the panels and to permit the panels to establish substantially uniform heat conducting contact with the element; a power supply cord has one end portion entering the space between the panels and has conductors connected with related ends of the heating element and has another end portion extending from the heater to connect with a power supply.
REFERENCES:
patent: 1455909 (1923-05-01), Ditton
patent: 2783358 (1957-02-01), Wolf
patent: 2889445 (1959-06-01), Wolf
patent: 3028477 (1962-04-01), Russell, Jr.
patent: 3084241 (1963-04-01), Carrona
patent: 3119918 (1964-01-01), Simon
patent: 3153140 (1964-10-01), Theodore et al.
patent: 3191005 (1965-06-01), Cox
patent: 3790753 (1974-02-01), Miller
patent: 3812320 (1974-05-01), Borgren
patent: 3842241 (1974-10-01), Issacson
McMullan James P.
Stevens Albert
Maxwell Georges A.
Mayewsky Volodymyr Y.
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