Overtemperature protector for an electrically heated appliance

Details Overtemperature protector for an electrically heated appliance Overtemperature protector for an electrically heated appliance

1980-03-06

1982-11-23

Bartis, A.

Electric heating

Heating devices

Combined with pressure application means

219517, 337 3, 337299, 337407, 337411, 337414, H05B 102, H01H 3776

Patent

active

043607250

ABSTRACT:
An overtemperature protector for an appliance having an electrical heating element includes a fixed contact, a movable contact carried by a spring blade and settable into engagement with the fixed contact to complete the energizing circuit to the heating element by stressing the spring blade, and a torsion spring having an arm engageable with the spring blade to hold the contacts in engagement against the stress bias of the spring blade. A fusible pin retains the arm of the torsion spring in engagement with the spring blade, thus locking the contacts closed. Excessive heat in the appliance causes the pin to soften, thereby allowing the torsion spring to shear the pin and release the movable contact to open the heating element energizing circuit. The overtemperature protector can be integrated with the control thermostat assembly of the appliance by mounting the protector on an extension of one of the contact arms of the thermostat assembly and connecting the contacts of the overtemperature device in series with the thermostat assembly contacts.

REFERENCES:
patent: 910118 (1909-01-01), Crutchfield
patent: 1227228 (1917-05-01), Woermer
patent: 1439979 (1922-12-01), Richardson
patent: 1475630 (1923-11-01), Herz
patent: 1644875 (1927-10-01), Dodge
patent: 2266480 (1941-12-01), Steiner
patent: 2488275 (1949-11-01), Du Pont
patent: 2707217 (1955-04-01), Collins et al.

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