Electricity: circuit makers and breakers – Electric switch details – Contact
Reexamination Certificate
2007-05-15
2007-05-15
Friedhofer, Michael A. (Department: 2832)
Electricity: circuit makers and breakers
Electric switch details
Contact
C218S146000, C335S016000
Reexamination Certificate
active
11481540
ABSTRACT:
A contact assembly for a circuit breaker includes a fixed contact, a movable contact, and a movable contact arm. The movable contact arm includes a first end carrying the movable contact, a second end, and a pivot portion proximate the second end. A moving arm portion extends from the first end toward the pivot portion. The moving arm portion has a width, an upper edge, a lower edge, and a height defined by the distance between the upper edge and the lower edge. In response to a trip condition, the movable contact separates from the fixed contact and the movable contact arm pivots open at an angular opening velocity. The height of the moving arm portion of the movable contact arm is at least four times the width of the moving arm portion, thus minimizing the moment-of-inertia of the movable contact arm, and increasing the angular opening velocity.
REFERENCES:
patent: 2211412 (1940-08-01), Filko
patent: 3267243 (1966-08-01), Dotto
patent: 3646488 (1972-02-01), Iida et al.
patent: 4281303 (1981-07-01), Heft
patent: 4482877 (1984-11-01), Castonguay et al.
patent: 4527027 (1985-07-01), Link et al.
patent: 4849590 (1989-07-01), Becker et al.
patent: 5029301 (1991-07-01), Nebon et al.
patent: 5367276 (1994-11-01), Castonguay
patent: 5517164 (1996-05-01), Zoller et al.
patent: 5910760 (1999-06-01), Malingowski et al.
patent: 6184761 (2001-02-01), Doma et al.
patent: 6452470 (2002-09-01), Malingowski et al.
patent: 6563407 (2003-05-01), Kramer
patent: 6717089 (2004-04-01), Azzola et al.
patent: 6831536 (2004-12-01), Zindler
patent: 6878890 (2005-04-01), Stay et al.
patent: 6924445 (2005-08-01), Bresciani et al.
Miller Jeffrey A.
Schaltenbrand Brian J.
Shea John J.
Eaton Corporation
Friedhofer Michael A.
Moran Martin J.
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