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US 4,069,736 AGranted
Music learning device
OwnerToshio Amemiyainventor
Life of this patent
Estimating the term…
Abstract
A device for learning musical concepts comprises a circular display of musical notes covering at least three octaves, including notes of sharp and flat key-signatures, in adjoining relationship and a plate rotatably attached to said display, said plate having means for indicating musical notes within said display bearing a predetermined angular space relationship to one another.
Claims2
A device for learning musical concepts comprising:
- a basic disc divided into 48 sectors, said sectors having therein indicia of musical notes to form a circular arrangement of four octave chromatic scales so that keys with sharp and flat key-signatures are in adjoining relationship,
- a second disc smaller in diameter than said first disc rotatably attached concentrically to said first disc provided with spaced apart windows to reveal selected portions of said first disc
- and a third disc rotatably attached concentrically to said first and second discs, said third disc having a diameter smaller than the window arrangement of said second disc and bearing indicia for a do-re scale.
Dependencies are inferred from the claim text.