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:
Jun. 09, 1981
Filed:
Jun. 14, 1979
Mamoru Osato, Yokosuka, JP;
Hiroshi Koizumi, Ohmiya, JP;
Sony Corporation, Tokyo, JP;
Abstract
A loudspeaker comprises a diaphragm including first and second layers and a core member sandwiched between the layers, in which the core member has an edge or peripheral surface aslant relative to the direction of thickness thereof; and a drive assembly, which includes a voice coil wound around a voice coil bobbin and which is connected to a node portion of the diaphragm when vibrated in its divided vibration mode. A support structure supports the diaphragm and the drive assembly, and includes a frame and an edge member secured to the frame, the edge member having a first portion corresponding to the slant of the edge surface of the diaphragm and which is adhesively connected thereto.