Contact assembly

Details Contact assembly Contact assembly

2006-12-12

2006-12-12

Enad, Elvin (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

C335S147000, C335S195000, C218S022000

Reexamination Certificate

active

07148774

ABSTRACT:
A circuit breaker contact assembly includes a line conductor having a folded back fixed contact end, a fixed contact mounted on the contact end, and a movable contact arm having an inner edge and first and second ends. A movable contact is mounted on the first end. The movable contact arm is pivotable about the second end between a closed position in which the inner edge extends adjacent the contact end with the movable contact in contact with the fixed contact to form a reverse current loop, and an open position in which the movable contact is pivoted away from the fixed contact. The contact arm includes a first inner longitudinal member extending along the inner edge and a second outer longitudinal member. The first inner longitudinal member has a higher electrical conductivity than the second outer longitudinal member, which has a higher shear strength and a lower specific density.

REFERENCES:
patent: 2211412 (1940-08-01), Filko
patent: 3646488 (1972-02-01), Iida et al.
patent: 4849590 (1989-07-01), Becker et al.
patent: 5029301 (1991-07-01), Nebon et al.
patent: 5910760 (1999-06-01), Malingowski et al.
patent: 6452470 (2002-09-01), Malingowski et al.
patent: 6831536 (2004-12-01), Zindler

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