Electronic piano circuit
CA 1046312 A · Owner: Wurlitzer Company (The) · Inventors: Machanian, William V.; Williams, Robert R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure The embodiment of the invention disclosed herein is directed to an electronic musical instrument of the keyboard type used to electronically reproduce piano sounds. The circuit has a velocity semitone circuit to vary the amplitude of the piano voice in response to the velocity of the downward movement of the key. A master generator and dividers are provided in combination with gates for producing a fundamental square wave frequency and the second and fourth harmonics thereof in re-, sponse to the actuation of a given key on the keyboard. One circuit arrangement includes gates for combining the fundamental frequency and the second and fourth harmonics in a …
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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 January 16, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 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.