Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1989-01-26
1990-08-21
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335131, 335202, 200293, H01H 6702
Patent
active
049510185
ABSTRACT:
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.
REFERENCES:
patent: 3215800 (1965-11-01), Hurter et al.
patent: 3643190 (1972-02-01), Puetz et al.
patent: 4253076 (1981-02-01), Guery et al.
Hanson Jon
Heckenkamp Daniel P.
Kurland Thomas F.
Schiffer Larry W.
Donovan Lincoln
Golden Larry I.
Johnston A. Sidney
Lowe, Jr. James E.
Picard Leo P.
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