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. 12, 1985
Filed:
Jun. 14, 1984
Edward F Veverka, Franksville, WI (US);
Nils V Holmgren, Greendale, WI (US);
Donald R Martin, Racine, WI (US);
Cooper Industries, Inc., Houston, TX (US);
Abstract
An load interrupter is disclosed having the characteristics of an ordinary puffer interrupter and a self-extinguishing gas flow interrupter. The load interrupter comprises a generally hollow cylinder which is adapted to be filled with an arc extinguishing fluid and which has an electrically insulated nozzle at one end. A piston is sealingly and slidingly disposed within the cylinder so as to be movable between a first and second position to change the internal volume of the cylinder that is in flow communication with the nozzled end. A stop limits the relative motion between the piston and the nozzled end of the cylinder. A spring biases the piston against the stop. One of the two contacts across which the arc is formed is carried by the piston. The other contact is operated by a prime mover to move into and out of the chamber formed by the piston, cylinder and nozzle. Thus, under low current conditions, the piston follows the movement of the other contact. Under high current carrying or fault conditions, the spring designed to be overcome by the energy released from the arc so as to control the temperature and pressure rise adequately enough to extinguish the arc by the self-extinguishing principle. The moving contact has a tip formed from an electrical insulating material to constrict the arc at the throat of the nozzle thereby increasing the arc extinguishing efficiency of the interrupter.