Crossbar assembly

Details Crossbar assembly Crossbar assembly

H - Electricity

01

H

306/327

H01H 75/00 (2006.01) H01H 1/22 (2006.01) H01H 77/10 (2006.01) H01H 9/38 (2006.01)

Patent

CA 1332067

CROSSBAR ASSEMBLY Abstract of the Invention A crossbar assembly is formed from an elon- gated 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 end 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 pre- vent 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 op- positely 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 in- vention 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 possibili- ty of axial movement of the contact arm carriers dur- ing overcurrent conditions due to loose staples is also eliminated.

605684

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