Music – Accessories – Tuning devices
Patent
1980-10-10
1982-05-25
Hix, L. T.
Music
Accessories
Tuning devices
324 79D, G10G 702
Patent
active
043310605
ABSTRACT:
There is disclosed a new and improved device which facilitates the tuning of musical instruments to a standard frequency with speed and accuracy. The device includes an indicating means comprising a plurality of light emitting diodes. The cathode of each diode is coupled to a saturated audio amplifier which is adapted to be coupled either directly to or by a microphone to a musical instrument to be tuned. The anodes of the diodes are coupled to an oscilator which provides any one of a plurality of selectable output frequencies which are harmonically related to a corresponding plurality of standard frequencies. The number of diodes, and the relation between the harmonic oscilator output frequency to the standard frequencies are such that when the instrument is in tune, one half of the diodes appear to be continuously and simultaneously lit. If the instrument is high or low in pitch relative to the selective standard frequency, the diode display will appear to move in first or second respective directions to thereby provide an easily discernable indication as to how the instrument must be adjusted to be brought into tune.
REFERENCES:
patent: 2924776 (1960-02-01), Peterson
patent: 3180199 (1965-04-01), Anderson
patent: 3861266 (1975-01-01), Whitaker
patent: 3901120 (1975-08-01), Youngquist
patent: 3952625 (1976-04-01), Peterson
patent: 3968719 (1976-07-01), Sanderson
patent: 4014242 (1977-03-01), Sanderson
patent: 4019419 (1977-04-01), Yoshikawa et al.
patent: 4078469 (1978-03-01), Coluin
patent: 4271746 (1981-06-01), Dobbie
Allen Rex Ollie
Hix L. T,.
Schreyer Stafford D.
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