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. 13, 1986
Filed:
Nov. 21, 1983
Yasushi Noda, Tokyo, JP;
Yoshiyuki Kashiwagi, Tokyo, JP;
Kabushika Kaisha Meidensha, , JP;
Abstract
A vacuum interrupter enhances current interruption capability for large current at high voltage. The interrupter includes a coil-electrode creating an axial magnetic field parallel to the direction of arc current passing across an interelectrode gap. The coil-electrode includes a radially extending web spaced from a contact-electrode of the interrupter, one end of the web electrically connected to a contact-electrode lead rod, a partially turning segment having one end connected through an electrical connector to the other end of the web, another web and a segment made of a material with electrical conductivity higher than the contact-electrode and attached to the back-surface of the contact-electrode. The other web electrically connects the other end of the segment to a contact-making portion of the contact-electrode, the one and other webs alternating at angular intervals. Current passes through the one and other webs in opposite directions. Current paths are shortened in the contact-electrode. The coil-electrode intensifies the axial magnetic field due to the arrangements of the webs.