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. 28, 1980
Filed:
Nov. 20, 1978
Richard Thaler, Unterentfelden, CH;
Sprecher & Schuh AG, Aarau, CH;
Abstract
Within a gas tight insulating housing of a gas-blast switch there are arranged a fixed contact surrounded by a blast chamber, a movable contact and a blast nozzle movable together with said movable contact. The blast nozzle is connected to a pump device containing a pump cylinder movable along with the movable contact. The pump cylinder is displaceable upon a stationary piston. Means are coupled with the pump cylinder and which means, during the course of the cut-off stroke of the gas-blast switch, are impinged by the extinguishing or quenching gas heated by the arc and augment the operation of the pump device, and thus, the cut-off movement. The means coupled with the pump cylinder incorporate an impact plate which bridges the substantially jacket or shell-shaped blast chamber between the pump cylinder and the inner wall of the insulating housing preferably up to the region of a ring-shaped or annular gap. The pressure wave emanating from the expanding, heated extinguishing gas which is preferably deflected by deflection blades impinges the impact plate which, in turn, augments the cut-off movement by means of the pump cylinder.