Vacuum-type circuit interrupter with an improved contact with ax

Details Vacuum-type circuit interrupter with an improved contact with ax Vacuum-type circuit interrupter with an improved contact with ax

1978-11-30

1981-04-07

Scott, James R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3366

Patent

active

042608643

ABSTRACT:
An improved vacuum-type circuit interrupter has arc contacts which have integral axial magnetic field generating means as part of the arc contact. The axial field generating means comprises a plurality of partial coil turn portions which form an effective single turn coil disposed between a supporting plate and an arcing contact portion. The coil turns are electrically in series between the conductive support rod lead-in and the arcing contact perimeter portion. The supporting plate and a plurality of support pins, each of which are of high strength, low conductivity material support the partial coil turn portions and the arc contact without diverting substantial current from the coil turn portions. The axial magnetic field generating means may be structurally a part of both contacts or only one of the contacts.

REFERENCES:
patent: 3158722 (1964-11-01), Porter
patent: 3321599 (1967-05-01), Lee
patent: 3345484 (1967-10-01), Polinko, Jr. et al.
patent: 3372258 (1968-03-01), Porter
patent: 3372259 (1968-03-01), Porter
patent: 3469050 (1969-09-01), Robinson et al.
patent: 3764764 (1973-10-01), Takasuna et al.
patent: 3818164 (1974-06-01), Mizutani et al.
patent: 3823287 (1974-07-01), Bettge
patent: 3852555 (1974-12-01), Schuoker et al.
patent: 3935406 (1976-01-01), Murano et al.
patent: 3946179 (1976-03-01), Murano et al.
patent: 4117288 (1978-09-01), Gorman et al.
patent: 4196327 (1980-04-01), Kurosawa et al.

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