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. 24, 1994
Filed:
Mar. 31, 1993
Werner Hartmann, Roettenbach, DE;
Horst Kippenberg, Herzogenaurach, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A vacuum switching tube contains a switching chamber and a first contact piece fixed in place in it, as well as a movable current conducting rod with a second contact piece and a ring-shaped insulator. According to the present invention, the ring-shaped insulator has at least one end surface on the vacuum side, which is at least partially free of metallization, and which faces away from the metal vapor formed during switching and is therefore protected against condensation. It is advantageous if a gap with a pre-determined length and height is formed by the end surface of the insulator and by at least one adjacent metallic flange.