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. 29, 1982
Filed:
Jan. 02, 1980
Takao Nakaya, Hamamatsu, JP;
Nippon Gakki Seizo Kabushiki Kaisha, Hamamatsu, JP;
Abstract
A planar type electroacoustic transducer comprising a diaphragm; at least one magnet plate on which are formed a plurality of mutually different and spaced magnetic poles in a matrix shape of columns and rows so as to face the diaphragm at a distance enough to involve the facing surface of the diaphragm within magnetic fields associated with the magnetic poles; and an electric conductor formed on the diaphragm to run in alternate directions of a column and a row along a path corresponding to the spaces defined between the respective magnetic poles without straightforwardly passing by any two magnetic poles of a same column or row. This diaphragm may be provided with ribs to further minimize the development of partial vibrations of the diaphragm. Those portions of the conductor running in regions of weak magnetic fields may have an enlarged size or smaller length to reduce the impedance of the conductor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile