The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1990
Filed:
May. 16, 1989
Junji Fujiwara, Oome, JP;
Kanya Doi, Fuchu, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
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.