Vacuum type circuit interrupter with a contact having integral a

Details Vacuum type circuit interrupter with a contact having integral a Vacuum type circuit interrupter with a contact having integral a

1976-06-25

1978-09-26

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147R, H01H 944, H01H 3318

Patent

active

041172884

ABSTRACT:
A vacuum type circuit interrupter is provided with contacts which include an integral axial magnetic field generating means. In one embodiment, a disc-like contacting portion is supported from the contact base, with a pair of half-turn conductive coil pieces extending between the base and the disc-like contacting portion. In another embodiment, the contacts have a cup-shaped base portion with a radially inwardly directed lip portion at the end of the cup-shaped portion to serve as the normal current carrying contact when the contacts are closed. The lip portions of these cup-shaped contacts are parted when the contacts are moved to the open position and the initial arc travels in a circular path around the annular lip. An auxiliary recessed disc-like contact portion is provided within the space defined by the cup-shaped base contact portion. The disc-like contact portion is supported from the base portion, and half-turn conductive coil pieces extend between the disc-like portion and the base portion of the contact so that an axial magnetic field may be generated when the contacts are in the open position.

REFERENCES:
patent: 3980850 (1976-09-01), Kimblin

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