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:
Oct. 14, 1980
Filed:
Jul. 19, 1978
Applicant:
Inventor:
Masami Kii, Amagasaki, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ; 2001 / ;
Abstract
A circuit interrupter comprises a pair of contacts being relatively moved to be detachable in an arc extinct chamber filled with a fluid for arc extinction; a pressurizing chamber for storing the fluid pressurized in an arc space in which the arc is formed by the departing operation of the contacts; and speed control means for controlling a speed for departing the contacts to at least two steps and said speed control means is connected to a driving system for the contacts wherein the fluid is discharged through the arc space out of the arc extinct chamber after departing the contacts for a specific distance and the arc is interrupted by puffing the fluid.