Square D Company

Thomas F Kurland

Lewis M Lehman

Jon H Hanson

Daniel P Heckenkamp

Larry W Schiffer

An electromagnetic contactor includes a housing assembly that may be adapted for one, two, three or four poles. An armature is affixed to a contact carrier either by a flat leaf spring that passes through a slot in a laminated armature or by a press fit of a solid armature into the contact carrier. In one embodiment of the invention, a housing assembly snaps into a base to permit a maximum amount of automatic asssembly and a minimum number of components. These components include a base, a magnet assembly having at least one shading coil, a formed coil assembly, two symmetrically disposed springs to return a contact carrier to a neutral position when the coil is de-energized, an armature to complete the magnetic circuit that is attached to the contact carrier, a contact block that supports terminals and stationary contacts, and a contact carrier that carries one or more moving contacts into engagement with the fixed contacts. A coil spring for each contact applies a force when the electromagnet is energized to draw the removable contacts to the fixed contacts to close an electric circuit. A magnet clip secures the magnet assembly by latching in place without screws or rivets. In an alternate embodiment, a molded cantilever supports a coil assembly under spring tension.

Electromagnetic contactor

The invention is an electrical shock prevention apparatus for electrical equipment having conductors capable of being connected to a voltage source comprising, a shield made of nonconductive material and guarding the conductors on at least three sides, and a cover attached to the shield by a living hinge so that when the cover is closed, the conductors are not accessible from a fourth side, and when the cover is open, the conductors are accessible from the fourth side. The invention also has rails molded into the side of the electrical apparatus, and grooves molded into a side of the shield so that the shield is attached to the apparatus by the grooves sliding over the rails. Protrusions extending from the side of the electrical apparatus snap into a recess of the shield, thereby locking the shield into position on the rails.

Growing community of inventors

Cedarburg, WI, United States of America

Thomas F Kurland