Device and auxiliary means for use in the diagrammatic representation of inter-relationships in musical theory and in musical analysis

摘要

465,996. Music. KONRAD, F. Sept. 7, 1936, No. 24427. [Class 88 (ii)] A device for demonstrating and analyzing musical relationships comprises an opaque basic disc a bearing enharmonic note-names and key signatures over which is concentrically movable within narrow limits (for sharp keys and flat keys) a toothed opaque disc h carrying a network of lines I, together with a further disc or discs i movable thereover through 360‹, said discs i being transparent and carrying different arrangements of coloured lines, geometrical figures k, m, &c. The device also demonstrates the construction of the pianoforte keyboard and the fingering of major scales.