Music – Accessories – Tuning devices
Patent
1976-12-16
1980-04-08
Gellner, Michael L.
Music
Accessories
Tuning devices
84454, G10G 700
Patent
active
041966520
ABSTRACT:
A digital electronic tuning device is provided in which an arrangement of light-emitting diodes [LED's] or other display elements indicates when two frequencies are equal. If the frequencies are unequal, the device provides an indication of both the magnitude and direction of the inequality. For use as a tuner of musical instruments, one frequency is provided by a preset clock while the second frequency derives from the musical instrument under test. In operation, a circular pattern of lights on the display elements appears stationary when the instrument is in tune and appears to rotate or spin when the instrument is out of tune. Some information about the harmonic content of the frequency of the signal under test may also be read from the device. In one embodiment, the invention may be used in connection with a stepping motor to automatically tune an instrument.
REFERENCES:
patent: 2881320 (1959-04-01), Goldberg
patent: 3016475 (1962-01-01), Kirsten
patent: 3144802 (1964-08-01), Faber
patent: 3304504 (1967-02-01), Horlander
patent: 3461392 (1969-08-01), Hughes
patent: 3577178 (1911-05-01), Hawley
patent: 3696293 (1972-10-01), Hoffmann
patent: 3745475 (1973-07-01), Turner
patent: 3745544 (1973-07-01), Ono
patent: 3745559 (1973-07-01), Mattem
patent: 3813983 (1974-06-01), Paul
patent: 3820022 (1974-06-01), Watt
patent: 3845615 (1974-11-01), Cake
patent: 3861266 (1975-01-01), Whitaker
patent: 3901120 (1975-08-01), Youngquist
patent: 4014242 (1977-03-01), Sanderson
patent: 4107595 (1978-08-01), Campe
Designing with TTL Integrated Circuit, Robert L. Morris, McGraw-Hill Book Co., p. 201.
Gellner Michael L.
Grubman Ronald E.
Schreyer S. D.
LandOfFree
Digital electronic tuner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital electronic tuner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital electronic tuner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-968055