Modulation rule

Details Modulation rule Modulation rule

1984-08-21

1985-11-12

Franklin, Lawrence R.

Music

Accessories

Teaching devices

84471R, 84471SR, 84474, G09B 1502

Patent

active

045520526

ABSTRACT:
A modulation rule having a member marked with a keyboard including white keys and black keys arranged in a similar manner to that of a keyboard musical instrument, and an indication table in which the names of keys are marked, for which the keys marked on each division, from left to right, are consecutively higher by one semitone; a movable member having divisions marked with numeral notes respectively, capable of being moved to have one division thereof aligned with a first division marked with a given key to provide the indication of scale at the given key; a plurality of indicating elements arranged in a certain relation with the keyboard and capable of being adjusted to provide visual indications concerning the keys, corresponding to the indicating elements which respectively should be lowered or raised by one semitone.

REFERENCES:
patent: 856358 (1907-06-01), Morris
patent: 3752031 (1973-08-01), Mohos

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