Automatic guitar tuner for electric guitars

Details Automatic guitar tuner for electric guitars Automatic guitar tuner for electric guitars

1975-11-26

1977-04-19

Schaefer, Robert K.

Music

Instruments

84454, G10D 500

Patent

active

040181243

ABSTRACT:
An automatic guitar tuner for a standard six string electric guitar which includes a pick-up, a master crystal oscillator, and a tone generator for each string of the guitar. The pick-up feeds a frequency comparator for each string of the guitar and each frequency comparator is fed by a separate tone generator. A light emitting diode is positioned under each of the strings of the guitar and is connected between the frequency comparator and a source of electricity, either battery or transformer. When the frequency of the individual tone generator and the frequency of the string match, the frequency comparator will complete a circuit through the light emitting diode so that the light emitting diode indicates that the individual string is properly tuned. When the string is out of tune it is adjusted in the normal fashion until the light emitting diode associated therewith is energized.

REFERENCES:
patent: 3722353 (1973-03-01), Westhauer
patent: 3766818 (1973-10-01), Proltofskt
patent: 3861266 (1975-01-01), Whitaker
patent: 3881389 (1975-05-01), Allen
patent: 3896697 (1975-07-01), Iannone
patent: 3901120 (1975-08-01), Youngquist
patent: 3948140 (1976-04-01), Ichioka et al.

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