Vacuum type circuit interrupter with a contact having integral axial magnetic field means

Abstract From the Canadian patent

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 cupshaped contacts are parted when the contacts are moved to the open position and the initial arc travels in a circular …