Thermostatic switch with j-shaped bimetallic switch arm

H - Electricity – 01 – H

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306/187

H01H 37/52 (2006.01)

Patent

CA 1068313

Abstract Of The Disclosure The switch includes a generally J-shaped, bimetallic switch arm having two, spaced, parallel legs, one of which is longer than the other. The shorter leg is welded at its outer end to a metal boss, which is formed on the face of a mounting bracket, and thus supports the longer leg above the face of the bracket so that a first contact on the outer end of the longer leg overlies, and is normally engaged with, a second contact, which is mounted on said bracket to be insulated therefrom. The high expansion side of the switch arm faces downwardly to confront the bracket, and since the shorter leg responds more rapidly to temperature changes than the longer leg, it tends to resist move- ment of the longer leg between open and closed positions and there- by prolongs the time the switch arm remains in either position.

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