Tone arm assembly
CA 1104940 A · Owner: Sony Corporation · Inventors: Shino, Kuninori; Kusaka, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tone arm assembly is provided with an electromagnetic means for moving a tone arm to the horizontal direction, an electro-magnetic detecting means connected to a rotating shaft of the tone arm so as to move integrally with the electro-magnetic means, a control means for applying a motional feedback to the electro-magnetic means and, a velocity setting means for setting the moving velocity of the tone arm in the horizontal direction whereby a, constant velocity servo is applied through the control means.
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 July 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 1998.
- 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.