Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1989-05-16
1990-11-27
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
H01H 3366
Patent
active
049738038
ABSTRACT:
A vacuum circuit breaker includes a main frame and a vacuum bulb unit supported on the rear side of the main frame. The vacuum bulb unit includes an intermediate support unit disposed at a rear side of the main frame, and a pair of vertically aligned vacuum bulbs supported on the upper and lower sides of the intermediate support unit. Each of the vacuum bulbs have therein a stationary contact and a movable contact which is movably supported by the intermediate support unit. An insulator bracket has one end secured to the rear of the main frame and extends rearward to support the intermediate support unit at the other end. The insulator bracket has a substantially inverted U-shaped cross section. A pair of frame-shaped insulation mounting members are secured to the upper and lower sides of the intermediate support unit. The opening and closing operation of the contacts in the vacuum bulbs are performed by the operation of an operating rod which passes through the inner space of the insulator bracket so as to extend therealong. A link mechanism is supported in the intermediate support unit so as to be operated by the shifting of the insulating operating rod. The link mechanism opens and closes the contacts when operated.
REFERENCES:
patent: 3163735 (1964-12-01), Miller
patent: 3562457 (1971-02-01), Peek
patent: 3597556 (1971-08-01), Sharp
patent: 3691332 (1972-09-01), Sharp
patent: 4550234 (1985-10-01), Steineuer
Doi Kanya
Fujiwara Junji
Kabushiki Kaisha Toshiba
Macon Robert S.
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