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. 03, 1995
Filed:
May. 10, 1993
Norbert Heinrich, Vienna, AT;
U.S. Philips Corporation, New York, NY (US);
Abstract
An apparatus (1) for playing a disc-shaped record carrier (2) having a central positioning hole (6) has a turntable (10) which comprises a positioning member (20) which is engageable in the positioning hole (6) and in which a pressure device 130) is arranged, the positioning member (20) having an annular recess (32) and the pressure device (30) comprising a coil spring (33) having turns (34) which project radially from the recess (32) to cooperate with a record carrier (2). The maximum height (H) of the recess (32) is smaller than the outer diameter (D) of the coil spring (33) in its no-load condition before it is mounted in the recess (32), and in the recess (32) the turns (34) of the coil spring (33) are held in an operational inclination condition (B) which is less steep than their comparatively steep no-load inclination condition (A). (FIG. 3)