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. 19, 1984
Filed:
Aug. 22, 1983
Applicant:
Inventors:
Naohisa Aoki, Mitaka, JP;
Akira Matui, Mitaka, JP;
Assignee:
Nippon Columbia Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
369147 ; 369170 ;
Abstract
In a moving-coil type pickup cartridge, a vibrating system including an armature wound with a coil is disposed at an open end area of a magnet with a damper being interposed between the armature and the magnet, and the armature is placed directly under the influence of magnetic flux produced between the ends of the magnet for generating a voltage without using any yoke. The magnet is a hollow cylinder having its interior free of any other magnet material.