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. 23, 1982
Filed:
Dec. 10, 1979
Louis Arquie, Paris, FR;
Claude Bricot, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
A device for providing access to information carried by a video disc comprises a fixed magnetic circuit having an air-gap which extends parallel to the radius of the disc. The access device is provided in addition with a low-weight moving system comprising at least one electric circuit forming a flat coil which is capable of sliding vertically within the air-gap and is so arranged that horizontal conductors are placed within the air-gap. Radial tracking and track-to-track transfer can be carried out by means of an electric circuit, at least one vertical conducting element of which is placed within the air-gap. Fast access is obtained by displacing this low-weight moving system.