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:
Aug. 02, 1977
Filed:
Jul. 21, 1975
Applicant:
Inventor:
Motoi Iyeta, Hamakita, JA;
Assignee:
Nippon Gakki Seizo Kabushiki Kaisha, Hamamatsu, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
274 / ;
Abstract
A pickup arm driving device in a linear tracking apparatus. The offset angle of the pickup arm is photoelectrically detected to produce a corresponding offset angle signal for driving a motor to move the pickup arm. Completion of the reproduction of sound from a disc causes a groove end detection signal which operates an electromagnetic lifter causing upward swinging of the pickup arm and a quick return of the pickup arm to an arm rest position.