Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-11-15
1992-12-08
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29598, 310 42, 310248, H01R 4304
Patent
active
051686201
ABSTRACT:
A composite brush to shunt attachment wherein a volatile component of a composite but mostly metallic brush, used for current collection purposes, does not upon welding or brazing, adversely affect the formation of the interfacial bond with a conductive shunt which carries the current from the zone of the brush. The brush to shunt attachment for a brush material of copper-graphite composite and a shunt of copper, or substituting silver for copper as an alternative, is made through a hot isostatic pressing (HIP). The HIP process includes applying high pressure and temperature simultaneously at the brush to shunt interface, after it has been isolated or canned in a metal casing in which the air adjacent to the interface has been evacuated and the interfacial area has been sealed before the application of pressure and temperature.
REFERENCES:
patent: 4336649 (1982-06-01), Glaser
patent: 4339874 (1982-07-01), McCarty et al.
patent: 4602179 (1986-07-01), Kuxnetsov et al.
patent: 4710665 (1987-12-01), Kilgore et al.
patent: 4710666 (1987-12-01), Rindal et al.
Denney Paul E.
Hannan, III William F.
Iyer Natraj C.
Hall Carl E.
Martin T. H.
Westinghouse Electric Corp.
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