Piano action magnetic tape recording process for player piano playback
CA 1091069 A · Owner: Brush, Gary T. · Inventors: Brush, Gary T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is provided for recording electric signals corresponding to piano key operation and for reproducing the piano key operation. The process includes switching a discrete frequency oscillator corresponding to each piano key algebraically adding, the outputs of each oscillator processing the algebraic sum of, the oscillator outputs recording the processed signal, reproducing the processed signal, reprocessing said recorded signal detecting each frequency in the reprocessed signal and energizing, an electromechanical device so as to actuate the piano key which had switched the discrete frequency oscillator. -1-
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 December 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 9, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.