Music – Accessories – Tuning devices
Patent
1974-08-28
1976-04-06
Hix, L. T.
Music
Accessories
Tuning devices
324 79R, G10G 702
Patent
active
039481409
ABSTRACT:
A portable device for generating and tuning a whole tone scale comprising means for generating a signal having a frequency of a reference tone scale, first means for shaping an output of the signal generating means and means for converting the output of the first shaping means. The device further includes means for converting the audible tone of a musical instrument to be tuned into a train of electrical signals, means for frequency multiplying and dividing input signals, second means for shaping the output of the converting means, logic means for logically comparing the outputs of the first and the second shaping means to generate a train of signals each having a width corresponding to the frequency difference between the outputs of the first and the second shaping means, and means for indicating the output of the logic means.
REFERENCES:
patent: 2901699 (1959-08-01), Motz
patent: 2909727 (1959-10-01), Andersen
patent: 2958250 (1960-11-01), Poehler
patent: 3180199 (1965-04-01), Anderson
patent: 3230614 (1966-01-01), Rasch
patent: 3433116 (1969-03-01), Althoff
patent: 3509454 (1970-04-01), Gossel
patent: 3722353 (1973-03-01), Nesthaver
patent: 3766818 (1973-10-01), Prohofsky
patent: 3795169 (1974-03-01), Belcher
Ichioka Satoshi
Inoue Tadashi
Katsuragawa Tomokazu
Takeuchi Shinjiro
Hix L. T,.
Mishima Kosan Co. Ltd.
Miska Vit W.
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