Music – Accessories – Teaching devices
Patent
1975-10-09
1977-07-26
Franklin, Lawrence R.
Music
Accessories
Teaching devices
G09B 1502
Patent
active
040375188
ABSTRACT:
A diagramming musical harmonic calculator determines combinations of natural or altered degrees in the musical scale encompassing from traditional to contemporary harmony, comprising a main disk having a central spindle, and having marked on the surface thereof at least one annular note array concentric with the spindle, having twelve radial marks displaced 30.degree. one from the other and corresponding to the twelve semitones in the tempered musical scale, and a plurality of indicating pieces capable of rotating around the spindle and bearing marks capable of coinciding with at least two marks in the main disk and allowing determination of different harmonic relations and combinations.
REFERENCES:
patent: 148097 (1874-03-01), Tillman
patent: 229545 (1880-07-01), McClain
patent: 1467032 (1923-09-01), Florence
Franklin Lawrence R.
Striker Michael J.
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