Patent ID: 6674620
Filing Date: 2004-01-06
Classification: H01H

Abstract:
A motor protector comprisingan electrically conductive base plate having a mounting surface, an electrically conductive bracket mounted on the mounting surface, the bracket having a first leg spaced from and extending transversely across a portion of the mounting surface, the bracket having a generally U-shaped portion forming a disc seating bight extending away from the mounting surface to position the disc seating bight at a location spaced from the mounting surface, a tab extending from the bight in a direction generally vertically away from the mounting surface, a snap-acting thermostatic disc movable between opposite concave, convex dished configurations upon being heated to an actuation temperature, the disc having a centrally disposed aperture therethrough, the disc disposed on the disc seating bight with the tab received through the disc aperture and with the dished shaped configuration facing the mounting surface being concave, an electrically conductive movable contact arm cantilever mounted on the first leg and extending across the disc, the movable contact arm having a free distal end portion, a movable contact mounted on the free distal end portion, a terminal pin extending through an aperture in the base plate and electrically separated therefrom, a stationary contact mounted on the terminal pin with the movable contact arm normally biasing the movable contact into contact engagement with the stationary contact, another terminal pin extending through an aperture in the base plate and electrically separated therefrom, a heater element having a first end connected to the said another terminal pin and a second end connected to the base plate, the disc having an outer peripheral portion received under the first leg limiting movement of the disc at the location of the first leg so that upon snapping to the opposite dished configuration the disc pivots on the disc seating bight with the outer peripheral portion of the disc diametrically opposite to the first leg engaging the movable contact arm to move the movable contact arm to a contacts disengaged position.