Electric heating – Heating devices – With heating unit structure
Patent
1992-03-06
1994-08-02
Bartis, Anthony
Electric heating
Heating devices
With heating unit structure
219537, 219541, 219550, 219551, 338 58, 338301, 338321, 392347, 392360, 392365, 392373, 392379, H05B 102, H05B 302, F24H 110, H01C 0000
Patent
active
053348184
ABSTRACT:
A heating element for an air flow comprises a channel shaped bracket including a base and side walls at right angles thereto within which is mounted a pair of mica sheets arranged parallel to the base and at right angles to the sides and connected to the sides by ribs longitudinally of the sides with transverse slots within which the sheets slide. Each sheet is wrapped with a heating wire formed into helical coils so that each side of the sheet carries a plurality of parallel helical coil portions with connecting portions wrapped over the edges of the sheet. The sheets are symmetrical and one is inverted relative to the other. Each sheet carries at ends thereof a male and a female connector of the blade and receptacle type so that the blade of one sheet engages into the receptacle of the other sheet. The connectors thus provide mechanical support to hold the sheet in spaced position and in addition provide electrical connection across the sheets so that electrical energy from supply wires is connected in parallel across the wires of the two sheets. The structure is simple to manufacture and provides a structurally rigid arrangement with high wire density leading to reduced wire temperature.
REFERENCES:
patent: 1014662 (1912-01-01), Momnot
patent: 1491194 (1924-04-01), Burger
patent: 1957227 (1934-05-01), Reimers et al.
patent: 4122329 (1978-10-01), Godel
patent: 4163146 (1979-07-01), Meywald
Pp. 23 to 38 from a book entitled "Kanthal Handbook-Resistance Heating Alloys for Appliances and Heaters".
Brochure entitled "The Most Advanced Heating Elements-In the World" by Hartford Eichenauger Inc.
Edwards Gary C.
Schaefer Ronald H.
Ade Stanley G.
Bartis Anthony
Battison Adrian D.
Temro Division, Budd Canada Inc.
Thrift Murray E.
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