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:
Mar. 08, 1994
Filed:
Jun. 04, 1992
Applicant:
Inventors:
Jun Sakurai, Shirakawa, JP;
Toshiyuki Kajikano, Shirakawa, JP;
Assignee:
Nippon Columbia Co., Ltd., Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 30 ; 369 37 ; 369 752 ;
Abstract
An optical disc playback device of the so-called 'carousel' type comprises a disc transport turntable rotatably mounted within the player housing. The underside of the turntable has an annular ridge with notches formed therein, and the housing comprises a photocouple which detects the presence or absence of the notches. The notches are so configured that each disc-holding section of the turntable has a distinct set of notches associated therewith, and each set of notches includes a central position-indicating notch and disc number-indicating notches disposed symmetrically on both sides of the central position-indicating notch.