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. 09, 1978
Filed:
Dec. 06, 1976
Applicant:
Inventors:
Sadao Yukimoto, Neyagawa, JA;
Tadayoshi Ishihara, Osaka, JA;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
1791 / ;
Abstract
A speaker comprising a voice coil assembly including a coil formed by pressure-winding an insulation-covered wire on a portion of the outer periphery of a coil bobbin disposed in the gap of a magnetic field, the beginning and the end of the coil being fixed to the coil bobbin by bonding material or adhesive tape, and a diaphragm coupled to the voice coil assembly, whereby the efficiency and performance of the speaker is enhanced.