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:
May. 27, 1986
Filed:
Oct. 24, 1984
Friedrich Pinnekamp, Siggenthal-Station, CH;
Abstract
In this isolating switch, which is suitable for electrically isolating and connecting components of gas-insulated encapsulated switching stations under, at the most, low load conditions, the fixed contact member (1) is provided with a central trailing contact (2) which ends in a contact member (7). It is coaxially surrounded by a circle of rated-current fingers (3a-h) and a fixed contact shielding electrode (15). The central contact rod (5) of the movable contact member (4) is coaxially surrounded at a distance by a shielding electrode (6) which is also movable. In order to prevent undesirable flash-overs, in particular flash-overs at the encapsulation, the rated-current fingers (3a-h) are in contact with the contact rod (5) in the area surrounded by the shielding electrode (6) which is also movable. They are mounted to be rotatable and have forces applied to them which press their end members (14a-h) radially inward. The contact member (7) is constructed as a shield-like plate having a front face (21) which is domed forward towards the movable contact arrangement (4). When the trailing contact (2) is pushed back, the rated-current fingers (3a-h), which are located behind the front face (21) when the trailing contact (2) is pushed forward, project through openings (22a-h) in the contact member. The contact rod (5) and, on its inside, the shielding electrode (6) which moves along with the former are provided with circumferential grooves (19,20).