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. 23, 1988
Filed:
Aug. 22, 1985
Ernst-Ludwig Hoene, Berlin, DE;
Roman Renz, Berlin, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A contact arrangement for a vacuum switch or vacuum circuit breaker having coaxial switch contacts with a high breaking capacity in combination with a low current chopping and with an axial magnetic field with locally different field strength being generated in the region of the switch contacts characterized by each contact member of the contact arrangement having at least one contact surface and one arc-focusing surface with that the contact surface being in a region of low field strength of the axial magnetic field and the arc-focusing surface being in a region of high field strength of the magnetic field. The contact surface is formed in an element of a low-surge material while the arc-focusing surface is formed in an element having a high breaking capacity. Due to the structural design of the contact surfaces, the breaking arc is always ignited in the region of the contact surfaces and the contact arrangement is suitable for vacuum switches with high short-circuit breaking current values.