Patent ID: 6097275
Filing Date: 2000-08-01
Classification: H01H,Y02P

Abstract:
A combination motor starting relay and motor protector apparatus comprising a casing forming a cavity having first and second switch chambers, a motor protector switch disposed in the first switch chamber having a movable contact arm movable into and out of engagement with a first stationary contact and a first snap acting thermostatic element movable between convex and concave configurations in dependence upon temperature, the first snap acting thermostatic element arranged so that upon changing configuration due to an increase in temperature to an actuation temperature the first snap acting thermostatic element biases the movable contact arm out of engagement with the first stationary contact, a first resistive heater disposed in the first switch chamber in heat conductive relation with the first thermostatic element, a motor starting switch disposed in the second switch chamber having a second electrically conductive, snap acting thermostatic element movable between convex and concave configurations in dependence upon temperature and having a free end movable into and out of electrical engagement with a second stationary contact in response to the change in configurations of the second thermostatic element, the second thermostatic element being disposed in heat conductive relation with the first resistive heater, a second resistance heater disposed in the second switch chamber in heat conductive relation with the second thermostatic element, the second thermostatic element upon moving into the configuration with the free end out of electrical engagement with the second stationary contact being closer to the first resistance heater in improved heat conductive relation therewith.