H - Electricity – 05 – B
Patent
H - Electricity
05
B
309/104
H05B 3/06 (2006.01) H05B 3/46 (2006.01)
Patent
CA 1228888
Abstract of the Disclosure A heater is disclosed having an elongate wire heating element with the heating element including at least two generally parallel runs supported on a frame by insulators with the portion of the heating element constituting the runs being formed generally in a helical coil and with the portion of the heating element between the runs being referred to as a turnaround. Specifically, the turnarounds are of non-helical coil construction and have at least one loop therein between the insulators supporting adjacent runs of the heating element thereby to permit limited movement between the adjacent runs and to permit thermal expansion and contraction of the turnarounds without applying a substantial force to the insulators. Further, the insulators are constructed so as to engage three convolutions of the coiled helical heating element runs with the intermediate engaged coil convolution being resiliently deflected inwardly toward the central longitudinal axis of the helical coil thereby to aid in resiliently retaining the run of the heating element on the insulator.
459365
Danko Michael
Janning James C.
Borden Ladner Gervais Llp
Emerson Electic Co.
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