Electric heating – Heating devices – With heating unit structure
Patent
1993-07-29
1994-10-04
Reynolds, Bruce A.
Electric heating
Heating devices
With heating unit structure
338203, 338212, 338260, 338332, H05B 354
Patent
active
053528700
ABSTRACT:
A resistance strip heater includes a pair of elongated, mutually parallel electrical conductors or buses lying on a dielectric substrate. Each bus includes a conductive region extending toward the other conductor, and the locations of the conductive regions of the two buses alternate along the lengths thereof. An elongated resistance arrangement has its axis of elongation parallel to the buses, is physically supported between the buses, and is electrically connected to mutually adjacent ones of the conductive regions, so that the resistance arrangement is electrically connected across the buses. In a particular embodiment of the invention, the resistance arrangement is a plurality of elongated chip resistors arranged in an array. The substrate may be a polyimide sheet, and a corresponding cover sheet may be used. The strip heater can be cut virtually anywhere along its length without affecting its operability. Thus, the strip heater can be fabricated and stocked in long lengths, even by rolls, and be cut to any desired length as needed. Electrical power is applied to the power buses via crimped metal connectors or via access holes opened by removing perforated areas of the cover.
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Berard, Jr. Clement A.
Daugherty Joseph P.
Wright Harold C.
Berard Clement A.
Jeffery John A.
Martin Marietta Corporation
Meise William H.
Reynolds Bruce A.
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