Compensating apparatus for changes in a record medium
CA 1190318 A · Owner: Sperry Corporation · Inventors: Schultz, Ralph H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A track positioning apparatus is provided for use with a record medium such as a floppy disk to compensate for physical changes in the disk resulting from variations in temperature or humidity. A grating used to posi-, tion a read-write head, includes reference marks thereon corresponding to reference tracks on the disk. The grating is stretched or compressed proportionally during a calibration operation to compensate for changes in the flexible disk.
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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 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2002.
- 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.