U.S. patent number 3,826,171 [Application Number 05/185,281] was granted by the patent office on 1974-07-30 for guitar string.
Invention is credited to James L. Kaar.
United States Patent |
3,826,171 |
Kaar |
July 30, 1974 |
GUITAR STRING
Abstract
A classic guitar string made of a synthetic plastic material,
such as polyester fibers, with minimum possible stretch so as not
to go out of tune, combined with a magnetic material, such as iron
oxide, to permit the use of a magnetic pick-up for an amplifier,
which picks up the magnetic vibrations only. In one form fine
resilient iron wire is wound in close coil around Dacron fibres so
that all the tension remains at all times on the fibres of the
string and none of the tension on the fibres is taken up by the
coil.
Inventors: |
Kaar; James L. (San Francisco,
CA) |
Family
ID: |
26705399 |
Appl.
No.: |
05/185,281 |
Filed: |
September 30, 1971 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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29841 |
Apr 20, 1970 |
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Current U.S.
Class: |
84/297S;
984/117 |
Current CPC
Class: |
G10D
3/10 (20130101) |
Current International
Class: |
G10D
3/00 (20060101); G10D 3/10 (20060101); G10d
003/00 () |
Field of
Search: |
;84/297S |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Franklin; Lawrence R.
Attorney, Agent or Firm: White; George B.
Parent Case Text
This is a continuation-in-part application of copending application
Ser. No. 29,841, filed Apr. 20, 1970, now abandoned.
Claims
I claim:
1. A guitar string comprising, a body of synthetic plastic
material, and magnetic metal particles imbedded in said body, said
particles being substantially evenly distributed throughout said
body.
2. A guitar string as in claim 1 wherein said plastic material is
Dacron.
Description
BACKGROUND OF THE INVENTION
In order to amplify the sound of a guitar, classic guitars
heretofore worked with sound amplification through a microphone,
and electric guitars worked by transmission of the vibration of
magnetic metal strings relatively to a magnetic field and
amplification of magnetic vibration ultimately converted into sound
with less distortion than the classic guitar microphone
transmission.
In the prior art the classic guitar was strung with copper wire
wound around nylon or other strings which had to be partially
amplified with an audio microphone which when turned up to the
conversational noise level of the room reaches the feedback
threshhold and produced a sound similar to howling, whereupon the
performer had to stop playing entirely. This previous amplification
of classic guitars in noisy public places also reproduced strong
noise and other extraneous and undesirable noises.
Attempts were made also to utilize a metal core with an exterior
flaky metal coating with a plastic binder on to the metal core, but
the same had the disadvantage of sounding differently than the
classic guitar, and resulted in a different touch and feel for the
player and in some instances increased the weight of the string and
thereby resulted in different type of manipulation and sounding
from the usual classic guitar strings.
The primary object of this invention is to combine magnetic metal
with a plastic string of the type in which stretch is minimal and
which maintains tuning even better than the usual classic strings,
and which becomes magnetic so as to permit the use of the classic
guitar with a magnetic pick-up and amplifier system which magnifies
only the magnetic vibrations but locks out feedback, strong noise
and all other extraneous and undesirable noises, and wherein the
magnetic vibrations truly correspond to the vibrations of the
plastic string or core, and the natural classic guitar string
tension is preserved.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective fragmental view on an enlarged scale of a
synthetic plastic solid string with a magnetic coil wound around
it.
FIG. 2 is a fragmental side view on an enlarged scale indicating
synthetic plastic filaments held together by a magnetic wire
tightly wound around a bundle of filaments.
FIG. 3 is a cross-sectional view, the section being taken on lines
3--3 of FIG. 2.
FIG. 4 is a fragmental view on an enlarged scale of a string made
of filaments and showing a plastic tape wound outside of the
magnetic coil.
FIG. 5 is a cross-sectional view, the section being taken on lines
5--5 of FIG. 4.
FIG. 6 is a fragmental view on an enlarged scale of a magnetic coil
imbedded within a synthetic plastic solid string.
FIG. 7 is a fragmental view on an enlarged scale of a plastic
string with magnetic particles imbedded therein.
DETAILED DESCRIPTION
In the classic guitar the first three strings, namely E
(.music-sharp.1), B (.music-sharp.2) and G (.music-sharp.3), are
usually made of a unitary nylon string, while the other three
strings, namely D (.music-sharp.4), A (.music-sharp.5) and low F
(.music-sharp.6), are usually made of a bundle of nylon filaments
previously held together by a copper wire coil.
In playing a guitar, synthetic plastic strings such as Dacron or
nylon require less tension than metal strings. In the various
embodiments herein, the natural tension of the plastic string or
core is preserved, and magnetic metal is so combined with the
plastic string as to be capable of vibration and pitch sympathetic
to those of the plastic string, for corresponding vibration of the
usual magnetic coil in the magnetic field of the armature of a
magnetic pick-up.
In the form shown in FIG. 1 a unitary Dacron string 1 is surrounded
by a resiliently yieldable magnetic metal coil 2, preferably of
iron oxide, capable of affecting the movable part of the magnetic
pick-up.
In the form shown in FIGS. 2 and 3 a bundle of Dacron fiber
filaments 3 are held together by a resiliently yieldable coil 4,
tightly wound around the bundle and made of properly tempered very
fine gauge iron oxide resilient wire, or of similar resilient
magnetic material.
In the form shown in FIGS. 4 and 5, the bundle of plastic filaments
are held together by a resiliently yieldable coil 7 made of
magnetic wire, and then covered by thin plastic tape 8 wound around
and over the coil 7.
FIG. 6 illustrates the imbedding of a resiliently yieldable spring
coil 9 of magnetic material within the body of the solid plastic
string 10, said spring coil being fine and of such resiliency as to
minimize interference with the natural tension of the plastic
string.
FIG. 7 illustrates iron oxide particles 11 substantially evenly
distributed throughout the body of the solid synthetic plastic
string 12. Such particles can be similarly imbedded also in
synthetic plastic fibers forming the filaments.
The synthetic plastic string treated or magnetized, as herein
described, substantially preserves its classic guitar tension, and
the resiliently yieldable magnetic coils conform to yielding and
vibration of the unitary plastic string or the plastic filaments,
and act on the field of a magnetic pick-up for high fidelity
amplification. When the magnetic particles are imbedded in the
plastic string they vibrate with the string and transmit to the
magnetic pick-up.
It is preferable to use a synthetic plastic filament of low
elasticity, high strength and low stretch so that the string does
not go out of tune on account of stretching, and therefore does not
require continuous tuning even during playing, yet it should give
the flexibility and easy playing action previously enjoyed only by
the classic guitarist. Hence strings made in accordance with the
herein invention would also improve the playing on an electric jazz
guitar.
Among the synthetic plastic fibers or filaments, at present, the
best with respect to low elasticity, high strength and low stretch,
is the filament made of polyester fiber, made from ethylene glycol
and terephthalic acid, commonly called "Dacron."
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