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Publication numberUS3673304 A
Publication typeGrant
Publication dateJun 27, 1972
Filing dateNov 13, 1970
Priority dateNov 13, 1970
Publication numberUS 3673304 A, US 3673304A, US-A-3673304, US3673304 A, US3673304A
InventorsAttila Dudas
Original AssigneeRaymond Lee Organization Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electronic guitar having plural output channels, one of which simulates an organ
US 3673304 A
An electric guitar is coupled through one channel of a stereo amplifier to a corresponding speaker in conventional manner while separate means responsive to string movements and pedal controls produce an organ like sound amplified in the other channel and reproduced in another speaker.
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Description  (OCR text may contain errors)

United States Patent Dudas 1 June 27, 1972 [54] ELECTRONIC GUITAR HAVING 2,910,906 11/1959 Della Libera ..84/DlG. 30

PLURAL OUTPUT CHANNELS, ONE OF 3,116,357 /1 3 wnrcn SIMULATES AN ORGAN 3,223,?" 12/1965 3,388,206 6/1968 [72] Inventor: Attila Dudas, New York, N.Y. 3,482,028 12/1969 [73] Assignee: The Raymond Lee Organization, Inc., New 3539699 l 1/ York NY 3,217,079 11/1965 3,249,677 5/1966 Burns et al..... [22] Filed: Nov. 13, 1970 3,530,227 9/1970 Wheeler et al ..84/1.16

[2]] Appl'No': 89236 Primary Examinerl..ewisH.Myers Assistant Examiner-Stanley J. Witkowski [52] US. Cl ..84/1.01, 84/1.16, 84/1.17, Attorney-Allison C. Collard 84/D1G. 27, 84/DIG.30, 84/D1G. l [51] Int. Cl ..Gl0h 3/00, GlOh 5/00 [57] ABSTRACT [58] meld Search An electric guitar is coupled through one channel of a stereo amplifier to a corresponding speaker m conventional manner while separate means responsive to string movements and [56] Rekmmes cued pedal controls produce an organ like sound amplified in the UNITED STATES PATENTS other channel and reproduced in another speaker.

2,792,738 5/1957 Donahue ..84/D1G. 30 4 Claims, 6 Drawing Figures 1 j @u/mem/f sax 24m 5,7 f/Mge mm (mm w a 20 22 1' 600/ 514 514 of fil /7%? J- flip/M pew/2 I a p y l FEE/1MP Bil/5E5 Eel 2 6 I (IN/7' pen E 1 l l eel/5Z6 M 2 W 5"5 l J J 97546;? EXTEE/VAM AMP /F/EZ MP1 F/EE Saw/5g man/we; gwa w ez SUMMARY OF THE INVENTION The purpose of my invention is to produce the sounds of a guitar combined with the sounds of an organ when an operator plays the guitar.

To this end, an electric guitar is coupled through one channel of a stereo amplifier to a loudspeaker in conventional manner with this one channel functioning as a conventional guitar amplifier.

Tone generators, tone forming units and a mixer are disposed within the guitar body. Push button switches select which generator to use. A pedal disposed outside the body controls the mixer. The output of the mixer is fed through the other channel of the stereo amplifier to another loudspeaker. Carbon strips are disposed underneath the bars on the keyboard of the guitar. Each strip is coupled to a corresponding generator whereby the tapping on this strip through the bars of the guitar changes the resistance and thus changes the tone generated. The sounds produced in the other speaker are simulated organ tones.


FIG. 1 is a block diagram of my invention;

FIG. 2 is a detail view of the guitar strings and keyboard;

FIG. 3 is a view taken along line 3-3 in FIG. 2;

FIG. 4 is a perspective view of the control switches;

FIG. 5 is a detailed circuit diagram of one portion of my invention; and

FIG. 6 is a circuit diagram of a modification of my invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring now to FIGS. 1-5, a guitar body of electric type (not shown in full)operates in cooperation with guitar mike and controls 10 to feed through the right channel amplifier 12 of a stereo amplifier to feed a loud speaker I4. The body contains six tone generators or oscillators 16, each associated with a different one of the six strings 18. Each oscillator is coupled through a corresponding tone forming unit which is a filter network, to a mixer 22, the gain of which is controlled by an external foot operated swell pedal 24. The output of the mixer is fed through a preamplifier 26, a volume control 28 (which is set to some value desired), the left hand channel amplifier 30 of the stereo amplifier and a second loudspeaker 32. The right and left hand channels of the stereo amplifier, which are coupled together schematically in FIG. 1, process the guitar and organ signals separately.

The metal bars or frets 34 on top of the neck 38 of the guitar each extend in spaced parallel transverse manner underneath all the strings. Six separate carbon strips 36 are disposed between the bars and the neck 38, each strip underlying a corresponding string. Each strip as shown in FIG, 5 is connected through a corresponding one of six manually operated switches 40 disposed in a bank 42 at the base of the strings. This bank also has six screws 44 each of which enables the user to tune the corresponding generator to the corresponding string. As shown in the circuit diagram of FIG. 5, screws 44 adjust the variable resistor RT and thereby adjust the pitch or tone of the tone generators 16. The generators will not function unless their switches are closed. With the switch closed, as the user presses a string down upon a bar or fret, the pressure on the corresponding strip changes its resistance and produces slight change in the generator or oscillator frequency.

Reverb amplifier 46, unit 48 and drive 50 can be coupled into the amplifier 30 via the volume control to produce a vibrato effect.

In FIG. 6, a modification is shown for use when the strings are plucked. To this end, six piezo electric devices 60 each tuned or associated with a corresponding string drive separate transistors 62 operating relays 64 which supply or interrupt the supply of current to a corresponding strip.

While I have described my invention with particular reference to the drawings, such is not to be considered as limiting its actual scope.

What is claimed is:

1. In an electric guitar, having a microphone and controls therefor, producing simulated organ tones, comprising:

first means, coupled to the microphone and controls, for

amplifying the electrical signals produced by the;

a first loudspeaker, coupled to said amplifying means, for audibly reproducing the electrical signals amplified by said amplifying means;

a plurality of tone generating means, each associated with a corresponding guitar string and tuned to the frequency thereof, responsive to the engagement of the guitar strings by the frets of the guitar, for generating a plurality of simulated organ tones;

second means, coupled to said plurality of tone generating means, for amplifying said plurality of simulated organ tones produced by said tone generating means;

a second loudspeaker, coupled to said second amplifying means, for audibly reproducing said amplified simulated organ tones;

a plurality of elongated strips of carbon material, each longitudinally disposed along the neck of the guitar below a corresponding guitar string, and positioned below and perpendicular to the frets of the guitar, said strips being coupled to said frets and said plurality of tone generating means so that the resistance of each of said strips varies with the position of the frets engaged by the guitar strings when finger pressure is applied to the strings of the guitar, for varying the output frequency of said plurality of tone generating means and the simulated organ tones produced; and

means for coupling said plurality of tone generating means to said second amplifying means.

2. The electric guitar as recited in claim 1, wherein said first and second amplifying means comprise a two-channel, stereophonic, electronic amplifier, having the first channel thereof coupled to the guitar and said first loudspeaker, and the second channel thereof coupled to said coupling means for said plurality of tone generating means and said second loudspeaker, so that said first loudspeaker audibly reproduces the sounds produced by the guitar strings and said second loudspeaker audibly reproduces said simulated organ tones.

3. The electric guitar as recited in claim 2, further comprising a plurality of manually operated switching means, each coupled to a corresponding one of said plurality of tone generating means and guitar strings, for switching said plurality of tone generating means on and ofi during operation of the guitar.

4. The electric guitar as recited in claim 3, further comprising a plurality of variable resistors, coupled to the strings of the guitar and said plurality of tone generating means, for varying the resistance between said tone generating means and the guitar strings, thereby adjusting the output frequency of said plurality of tone generating means and tuning said plurality of tone generating means to the strings of the guitar.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2792738 *Apr 28, 1954May 21, 1957William A DonahueFretted electronic musical instrument
US2910906 *Jul 1, 1957Nov 3, 1959Libera Juan B DellaMusical instrument
US3116357 *Jun 26, 1961Dec 31, 1963Krebs LeoMusical instrument
US3217079 *Jun 25, 1962Nov 9, 1965Robert H MurrellElectronic guitar
US3223771 *Feb 23, 1962Dec 14, 1965Alvin S HoppingElectronic musical instrument employing finger-pressure means to sequentially energize oscillator means and amplifier means
US3249677 *Oct 19, 1962May 3, 1966Ormston Burns LtdPick-ups for guitars and coupling circuits therefor
US3388206 *May 21, 1965Jun 11, 1968Marvin PopeGuitar with remote control organ playing means
US3482028 *Aug 15, 1966Dec 2, 1969Cox Ivan FGuitar type keying system for other instruments
US3530227 *Apr 10, 1968Sep 22, 1970Gen Music IncStringed guitar with electronic organ tone generators actuated with fingerboard switches or frets and conductive pick
US3539699 *Jan 26, 1967Nov 10, 1970Johnson Richard ATwo-in-one stringed electronic instrument with string pickup and tone generator
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3742114 *Jul 22, 1971Jun 26, 1973Barkan RGuitar-like electronic musical instrument using resistor strips and potentiometer means to activate tone generators
US3902395 *Oct 11, 1973Sep 2, 1975William L AvantStringed musical instrument with electronic time division multiplexing circuitry
US3948138 *Apr 28, 1975Apr 6, 1976Gunn Gary JVibrating string-modulated electronic musical instrument
US4030397 *Nov 21, 1975Jun 21, 1977Nelson Walter EElectrically amplified musical instrument control apparatus
US4096780 *Dec 23, 1976Jun 27, 1978Lorna Ann DawsonStereophonic electromagnetic pickup device for stringed musical instruments
US4211893 *Nov 13, 1978Jul 8, 1980Mesa Engineering, Inc.Dual mode music instrument amplifier
US4377101 *May 11, 1981Mar 22, 1983Sergio SantucciCombination guitar and bass
US4430918 *Feb 16, 1982Feb 14, 1984University Of PittsburghElectronic musical instrument
US4580479 *Dec 13, 1983Apr 8, 1986Octave-Plateau Electronics Inc.For an electronic music synthesizer
US4630520 *Nov 8, 1984Dec 23, 1986Carmine BonannoMethod of detecting note selection in a guitar
US4677419 *Feb 6, 1986Jun 30, 1987University Of PittsburghElectronic musical instrument
US8143509 *Jan 16, 2009Mar 27, 2012iZotope, Inc.System and method for guitar signal processing
US8766082Dec 21, 2010Jul 1, 2014Mesa/Boogie, Ltd.Amplifier with selectable master control
EP0145814A1 *Oct 26, 1983Jun 26, 1985Frank MenoElectronic stringed musical instrument
U.S. Classification84/722, 984/346, 84/DIG.100, 84/DIG.270, 84/DIG.300
International ClassificationG10H3/18, G10H1/34
Cooperative ClassificationG10H3/186, Y10S84/30, Y10S84/27, Y10S84/01, G10H1/342
European ClassificationG10H3/18P, G10H1/34B