Apparatus for reading a disk-shaped record carrier to be placed on a turntable
CA 1059620 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Janssen, Peter J.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A record player especially for disk-shaped video records, provided with a centring device which includes an adjusting mechanism, by means of which the turntable is movable relative to a frame which is disposed on a rotary shaft; at least one electromagnetic drive means for controlling the adjusting mechanism and an electrical measuring system for measuring the eccentricity of the tracks and supplying a control signal to the drive means. The drive means includes at least tow movable transmission elements which act in mutually different direction, each transmission element being movably connected to the frame, engaging with the turntable under pre-tension and cooperating with a drive means, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.