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. 08, 1985
Filed:
Jun. 03, 1981
Norio Shibata, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A turntable device having rotary recording medium size changeover capability in a rotary recording medium reproducing apparatus, comprising a turntable driven in rotation by a rotation driving source, a turntable sheet carried on the turntable for carrying and supporting a rotary recording medium thereon thereby to unitarily rotate therewith, a spindle for the turntable, an air suction pump, and a communicating structure providing communication between the air suction pump and enclosed spaces formed between the turntable sheet and the rotary recording medium. The turntable has a first group of suction grooves of predetermined patterns. The turntable sheet has a second group of suction grooves of predetermined patterns. The turntable sheet is changed over according to the size of the rotary recording medium adhered onto the upper surface of the turntable sheet, upon a rotational setting operation in which the turntable sheet is rotated by a predetermined angle to vary the communication between the first and second groups of the suction grooves of the turntable and the turntable sheet.