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:
Jun. 18, 1991
Filed:
Oct. 13, 1988
Norbert Heinrich, Vienna, AT;
U.S. Philips Corporation, New York, NY (US);
Abstract
A slide (19) is driven by a gear mechanism (21) to position a scanning device (15) in a radial direction relative to the record carrier between an innermost track 3) and an outermost track (4), a stop (38) of the slide (19) abutting against a fixed stop (39) on the apparatus when the scanning device (15) is positioned at the outermost track (4). The gear mechanism (21) comprises a pinion (24) driven by a motor (20) and two gear racks (26, 27) which are tensioned relative to one another by a spring (25) and driven by the pinion, one of the gear racks (27) being fixed to the slide (19). When the slide (19) abuts against the fixed stop (39) the gear rack (27) is not in mesh with the pinion (24) and at least one end tooth (40) of the other gear rack (26) is situated in a range where it can mesh with the pinion (24). The spring (25) holds the slide (19) against the stop (39) and urges the other gear rack (26) towards the pinion (24), thus providing overload protection for the motor (20) and the gear mechanism (21).