Thermal overload relay
AssigneeWestinghouse Electric Corp.
InventorsPaul T. Anderson, Stephen S. Dobrosielski
Life of this patent
Estimating the term…
Abstract
A thermal overload relay characterized by a plurality of pole units, stationary and movable contacts, a slide within the housing for moving the movable contact between open and closed positions, a movable contact mounting arm on the slide, latch means on the slide for latching the slide in one of said positions, resetting means for moving the slides to the latched position, each pole comprising a bimetal element responsive to current flow to effect heating thereof, a crossbar associated with the bimetal element to effect unlatching of the latch means, and the housing being an integral single unit into which the several foregoing elements are inserted in place.
Claims11
An electrical control device comprising a housing, a stationary contact, a movable contact, a slide within the housing for moving the movable contact between open and closed positions, a movable contact mounting arm on the slide, latch means on the slide for latching the slide in one of said positions, the slide being spring-biased in the other position, manual reset means for moving the slide to the latched position and comprising a reset rod, a plurality of pole units, each pole comprising a bimetal element responsive to current flow to effect heating thereof, and a crossbar associated with the bimetal elements to effect unlatching of the latch means.
Dependencies are inferred from the claim text.