Heating coil standoff and support structure

Details Heating coil standoff and support structure Heating coil standoff and support structure

1997-09-29

1999-09-21

Walberg, Teresa

Electric heating

Heating devices

With heater-unit housing, casing, or support means

338303, 338304, H05B 306, H01C 320, H01C 314

Patent

active

059549831

ABSTRACT:
An insulating support structure for a helical wire heating coil for an electric resistance heating element includes a plurality of insulating standoff members supported by a metallic support frame. The insulating standoffs each include a pair of wedge portions that are used to separate the individual convolutions of the helical wire heating coil. Located inwardly from each of the wedge portions are a pair of V-shaped coil grooves sized to receive a portion of an individual convolution of the helical wire heating coil. A retainer tab extends into the coil groove such that the wire heating coil contacts the retainer tab and a pair of contact surfaces that define the coil groove. The insulating standoffs are each supported by an arm contained on the support frame. Each of the arms includes a pair of tines which combine to form an open slot within the arm. The insulating standoff is captured between the tines by a pair of locking projections on the outer end of the tines. The tines are positioned within a pair of recessed attachment slots in the standoff such that the standoff is securely held between the tines.

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