Heating element coil support

Details Heating element coil support Heating element coil support

1990-09-18

1992-06-16

Reynolds, Bruce A.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219536, 219542, 174138J, 174175, 338304, 338317, 338318, H05B 306

Patent

active

051226405

ABSTRACT:
An insulating support for a helical wire heating coil for an electric resistance heating element includes a coil supporting notch into which a single helical coil turn is inserted and locked into position without twisting the coil and without unduly stretching the coil in an axial direction. The supporting notch includes lead-in ramp surfaces to spread the two halves of the coil turn until the coil is centrally positioned in the notch, whereupon the coil turn snaps into locking engagement with four separate abutments to prevent dislodgement. A central portion in the notch includes a separate coil supporting surface that limits further movement of the coil into the notch and the notch also includes interior lateral abutment surfaces to engage the outside of the coil turn and prevent lateral movement in the notch. The faces of the support body adjacent the notch are engaged by opposite half portions of the coil turn to preclude axial movement of the coil once it is locked in position.

REFERENCES:
patent: 3846619 (1974-11-01), Wightman et al.
patent: 4250399 (1981-02-01), King

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