Digitally responsive system for positioning a transducer of a storage apparatus
CA 1265615 C · Owner: Fujitsu Limited · Inventors: Mizoshita, Yoshifumi; Hasegawa, Susumu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
With a servo system for positioning a transducer of a rotatable storage apparatus over a servo tracks of a magnetic disk, a mehthod for processing trains of positioning pulse signals is provided. With a fixed duration time a reference, voltage, changing with time having a predetermined pattern is, generated and compared with a train of the positioning pulse signals contained in the duration time. The magnitude of the positioning signals which varies with the displacement of the transducer from a guide path to be followed is given by counting the number of the positioning signals exceeding the reference voltage pattern. Thus, an error signal for the servo system is fed back in a digital …
Read the whole patent
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 February 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 2007.
- 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.