Patent · US Expired

Centering of a disc-shaped record carrier on a turntable

US4351047A · kind A · utility

24Cited by

3References

11Claims

0Family size

Assignee

Licentia Patent-Verwaltungs-GmbH · DE

Inventors

Horst Redlich · Berlin, DE
Heinz Borchard · Nortorf, DE
Rainer Ihlenburg · Berlin, DE

Key dates

Filing date	Oct 2, 1980
Grant date	Sep 21, 1982
Priority date	—
Expiry date	Oct 2, 2000

Classification

Technology area (CPC G)Physics
CPC primaryG11B23/0035
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A device for centering a record disc with respect to a turntable, in which the disc is successively radially centered and axially positioned relative to the turntable, which device includes a centering shaft engageable with the disc to effect preliminary radial centering thereof, is additionally provided with further radial centering elements mounted to engage a disc after it has engaged the shaft and to undergo yieldable movement relative to the turntable in the axial direction of the disc under the influence of its engagement with the disc for effecting final radial centering of the disc, and a magnetic attracting unit operatively associated with the disc and the turntable for axially positioning the disc after it has been finally radially centered.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.