Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1988-08-01
1991-10-15
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335 8, H01H 7500
Patent
active
050578065
ABSTRACT:
A crossbar assembly is formed from an elongated metal bar. A pair of contact arm carriers are slid onto the metal bar and welded in place. Molded electrically insulated sleeves are sliding received at each of the crossbar. The insulated sleeves can be either molded directly on the crossbar or molded separately, in which case, the sleeves are glued with epoxy and pinned to the crossbar to prevent axial movement of the sleeves with respect to the crossbar. The insulated sleeves are formed with a pair of plates disposed at each end. A pair of oppositely disposed slots formed in the plates is used to receive the ends of a cam roll pin assembly. Since the crossbar in accordance with the present invention does not require wrapping with insulating paper, the possibility of dielectric failure due to cracking of the insulating paper is eliminated. Also, since the contact arm carriers are welded to the crossbar instead of being stapled, the possibility of axial movement of the contact arm carriers during overcurrent conditions due to loose staples is also eliminated.
REFERENCES:
patent: 4166988 (1979-09-01), Ciarcia et al.
patent: 4489295 (1984-12-01), Altenhof, Jr. et al.
patent: 4574170 (1986-03-01), Abe et al.
patent: 4638277 (1987-01-01), Thomas et al.
patent: 4656444 (1987-04-01), McKee et al.
patent: 4679018 (1987-07-01), McKee et al.
Gula Lance
McKee Jere L.
Thomas Glenn R.
Donovan Lincoln
Moran M. J.
Picard Leo P.
Westinghouse Electric Corp.
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