H - Electricity – 05 – B
Patent
H - Electricity
05
B
309/106, 26/144,
H05B 3/26 (2006.01) F27D 1/00 (2006.01) H05B 3/64 (2006.01) H05B 3/66 (2006.01)
Patent
CA 1231749
ABSTRACT OF THE DISCLOSURE In accordance with the present invention a block of thermal insulating material containing inorganic fibrous material is provided with an elongated slot which extends into the block forming opposed walls on opposite sides of the axis of the slot. A heating element in the form of elongated serpentine wire with opposed bends on opposite sides of the axis of the wire is disposed in the slot with the bends on one side engaging one wall of the slot and the bends on the other side engaging the other wall of the slot. In a pre- ferred construction, the walls of the slot are parallel, and the bends on one side are spaced from the bends on the other side by straight portions of the electrical resistance wire, the straight portions being approximately parallel to each other and of equal length.
479927
Borden Ladner Gervais Llp
General Signal Corporation
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