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:
Aug. 22, 1978
Filed:
Mar. 01, 1977
Applicant:
Inventor:
Joseph H Lipperts, Hengelo (O), NL;
Assignee:
Hazemeijer B.V., Hengelo (O), NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ; 2001 / ;
Abstract
An evacuated envelope contains two stationary contact elements which have an gap therebetween, and positioned within the gap are two metal discs separated by an insulating disc. Each metal disc is connected to a terminal coil which is connected to an electromagnetic coil operative to produce a magnetic field in the region of the gap and substantially in parallel with the width of the gap. A U-shaped contact element is positioned with the envelope to move into and out of contact with each of the stationary contact elements. The stationary contact elements are each connected to separate contact rods which extend through the envelope walls to the outside.