Patent ID: 6995647
Filing Date: 2006-02-07
Classification: H01H

Abstract:
1. A motor protector comprising a housing member having a bottom wall, a sidewall extending upwardly from the bottom wall defining an open end and a switch chamber, the sidewall having a free end formed with a laterally, outwardly extending flange having portions on at least two opposite sides of the open end, a thermostatic switch having a movable contact received in the switch chamber electrically connected to the housing member, a gasket received on the flange and having an opening aligned with the open end of the housing member, a lid having first and second spaced apart parts, each lid part having two opposite sides formed with tabs receivable over flange portions of the housing and the gasket and being clamped to the flange portions through the gasket, each lid part having a face surface received on the gasket covered flange portions and a recessed contact shelf disposed within the switch chamber when the lid is disposed on the gasket covered flange, the shelves being in alignment with and facing each other forming a ceramic substrate seat, and the first lid part having a stationary contact portion and the movable contact being movable into and out of electrical engagement with the stationary contact portion, a ceramic substrate formed with opposite first and second face surfaces and opposite end portions, an electrical contact surface formed at each end on the first face surface of the substrate and electrical resistance material disposed on the first face surface between and in electrical connection with the contact surface at each end on the first face surface, the contact surfaces of the ceramic substrate received on the respective contact shelf, and a spring clip member attached to the housing member for applying contact force through the ceramic substrate to the contact shelves, the ceramic substrate being disposed in the switch chamber in close thermal coupling with the thermostatic switch.