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:
Apr. 13, 1976
Filed:
Nov. 26, 1974
Mitsuki Nagamoto, Tsu, JA;
Matsushita Electric Works, Ltd., Osaka, JA;
Abstract
An electromagnetic device made of flat components, which requires no resetting spring for the armature which is high in efficiency and small in size. The device comprises first and second yokes in contact respectively with magnetic pole surfaces of a permanent magnet and presenting pole faces opposed to each other. A pivoted armature, swingable between the pole faces on first and second yokes, by reason of the permanent magnetism, normally engages the pole face on the second yoke. A coil is wound around the armature, with current in the coil serving to overcome the permanent magnetism so that the armature moves to the opposite position against the pole face on the yoke. The device can be of latch type or single stable type by making the armature or either one of the yokes of a semihard magnetic material which is low in coercive force and high in residual magnetic flux density.