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. 28, 1985
Filed:
Sep. 23, 1982
Fumikazu Murakami, Tokyo, JP;
Kabushiki Kaisha Daini Seikosha, Tokyo, JP;
Abstract
In an electrodynamic speaker comprising a vibrating plate, a voice coil secured to the vibrating plate, a magnetic circuit portion having a soft magnetic member and a magnet and having a magnetic gap, a frame for supporting the peripheral portion of the vibrating plate and the magnetic circuit portion, and a lead substrate. The voice coil is secured to the vibrating plate after the vibrating plate is secured to the frame and then the magnetic circuit portion is assembled on the frame. As a result of it, the lead terminal of the voice coil can be connected to the lead substrate through the notch portion of the frame in the same process as mounting the voice coil on the vibrating plate wherey the factor of variation in the magnetic gap dimension which affects the efficiency of the magnetic circuit is reduced.