Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1997-11-07
1999-03-09
Walberg, Teresa
Electric heating
Heating devices
With heater-unit housing, casing, or support means
174138J, H05B 306
Patent
active
058804404
ABSTRACT:
An electrical resistance heater (12) has an elongate electrical heating coil (C) with a plurality of convolutions (C1, C2). An electrical insulator (10) supports the convolutions and includes an insulator body (18) mountable to a support frame (19). A generally circular projection (20) extends from one side of the body and is integrally formed therewith. A generally arcuate section (26, 28) of the projection, on opposite sides of the projection, is spaced from an adjacent surface (30, 32) of the body. A notch (34, 36) is formed by the respective surfaces of the body and the projection for respective coil convolutions (C1, C2) to be received in the respective notches. The upper end (42, 44) of the faces (38, 40) of the projection are tapered outwardly from the top of the projection to facilitate coil installation. A shoulder (30s, 32s) formed on the insulator body adjacent each notch helps retain the coil convolutions in the notches. An insulator (110) having a pair of projections (120a, 120b) integrally formed with an insulator body (118) is used to support coil convolutions on both sides of the insulator.
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Barnes Ronald R.
Markum T. Randall
Ray Herbert G.
Whitfield Charles T.
Emerson Electric Co.
Pwu Jeffrey
Walberg Teresa
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