Vacuum switch

Details Vacuum switch Vacuum switch

1990-03-27

1990-12-04

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3366

Patent

active

049755528

ABSTRACT:
A vacuum switch which has a housing for a vacuum chamber. The housing includes a metal cylinder and an insulating cylinder axially aligned and hermetically sealed at adjacent ends, and closed at opposite ends by end walls. A stationary electrode and a movable electrode are provided in the vacuum chamber, surrounded by the metal cylinder. Stationary and movable electrode lead rods are fixed to the respective electrodes and project in opposite directions from the chamber through the end walls. A magnetic coil whose coil body is molded in an approximately bell-shape and is made of an electrically and thermally conductive material, surrounds the metal cylinder with a winding that is connected by way of an input lead with the electrode lead rod penetrating the end wall closing an end of the metal cylinder. A relatively thick top portion of the coil body is disposed above the end wall and has a rounded upper end, while a less thick cylindrical side wall surrounds the metal cylinder and has a rounded lower end. The winding is connected by way of an output lead with a connecting surface adjacent to the metal cylinder. The input and output leads are provided within the top portion, and in the preferred embodiment are integrally formed therein with a gap separating them so as to direct a portion of the operating current at the input lead around the metal cylinder through the side wall portion of the coil body, before reaching the connecting face.

REFERENCES:
patent: 3562457 (1971-02-01), Peek

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