Inversion sliderule
OwnerVerna M. Leonardinventor
Life of this patent
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Abstract
The invention is a musical aid used to simplify the comprehension of chord inversion structure and enable the composer to more readily visualize the keyboard location and fingering of chords and their inversions used in a composition, the device having a frontal panel display of the scale tones of a particular key signature and a sliding member behind the panel which is provided with numbered, pivotal indicators to select a triad orderd in the root or an inverted position from the Scale tones on the panel, the invention including a rotatable disc on the sliding member having selectively exposeable chords displayed on the periphery thereof naming the triads and their inversions occuring in the key signature of the panel.
Claims7
An aid for selecting chord inversions comprising:
- a. a panel having displayed thereon the names of the scale tones of a given key signature, the relative spacing between said scale tone names being proportional to the spacing of the counterpart keys of a piano keyboard;
- b. a generally planar slide member;
- c. means to slideably engage said slide member with said panel;
- d. a plurality of indicator strips pivoted to said slide member and pivotal into a position in which said strips register with a plurality of said named scale tones, whereby upon sliding said sliding member relative to said panel and the selective pivoting of said strips into said registering position, a root triad or an inversion thereof may be alternatively selected on said panel sequentially for a plurality of different root tones.
Dependencies are inferred from the claim text.