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:
Feb. 03, 1987
Filed:
Oct. 26, 1984
Applicant:
Inventors:
Ronald W Crookston, Trafford, PA (US);
Jeffry R Meyer, Pittsburgh, PA (US);
Assignee:
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ; 200 / ; 2001 / ;
Abstract
An actuator for an electrical circuit interrupter has a power cylinder for operating the circuit interrupter from a high pressure gas flow provided by a gas generating power unit which is a shotgun type shell container filled with a propellant. The propellant is characterized as being composed of spherical nitrocellulose grains having a nitroglycerin content; it is essentially free of deterrent coating and may have a granulation of 0.038/0.020 inches diameter range. Two suitable types are WC 630 or WC 615 manufactured by Olin Corporation of East Alton, Ill.