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:
Jan. 16, 1979
Filed:
Mar. 29, 1977
Applicant:
Inventor:
Mitsuru Baba, Hamamatsu, JP;
Assignee:
Nippon Gakki Seizo Kabushiki Kaisha, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 274 / ; 274 / ;
Abstract
In a linear tracking pickup arm type automatic record player, the position of the pickup arm is opto-electrically detected by the use of a multi-window scale and a photo-coupler unit, and the pre-assigned position signals stored in a memory are compared with the detected position signal to control the movement of the pickup arm. Therefore, the reproduction and the precisely repeated reproduction of any part of a record disk are made possible.