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Патент USA US3052155

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Sept. 4, 1962
A. lORlO
SWITCH FOR ELECTRONIC MUSICAL INSTRUMENT
Filed Aug.‘ 20, 1959
3,052,147
3,052,147
a
United States Patent 0 " ICC
2
1
_
3,052,147
SWITCH FOR ELECTRONIC MUSICAL
INSTRUMENT
Amedeo Iorio, 57-05 155th St., Flushing, N.Y.
Filed Aug. 20, 1959, Ser. No. 835,020
5 Claims. (Cl. 84-171)
Patented Sept. 4, 1962
the spring slidably engaging a rigid guide 15 on the
back of the key.
A longitudinal strip 16 is secured to a longitudinal
panel 17 rigid with the frame, the strip 16 being positioned
behind ‘and spaced from the upper portion of the key.
Along its lower (FIG. 2) edge, a plurality of equi
distant but closely adjacent notches 18 are cut into the
said lower edge of the strip. A longitudinal thin closure
This invention relates to electrical musical instruments
strip 19 is secured against the said edge of the strip 16, as,
of the type wherein the playing of one instrument causes
another instrument to produce the tones normally issued 10 for example, by gluing or otherwise, thus forming the
actuate synchronously a tone generator to ‘cause the latter
notches 18 into rectangular passages.
A transverse, preferably rounded, groove 20 is cut into
the back of each key and is positioned with its center
to reproduce the musical tones corresponding to the
line in the plane of one of the passages 18.
by the ?rst instrument. More particularly, the present
invention aims at providing an accordion adapted to
In each
keys and buttons depressed by the accordion. An electric 15 passage 18 a slide 21, rectangular in cross-section and
complementary to the passage, is slidably mounted in
organ tone generator is available on the market as a
the passage, with its top edge rounded and registering
standard unit, and, by means of electric switches and con
ductors connected to such a tone geenrator from the ac
in the adjacent groove 20 of the key. The slide 21 has
cordion, the playing of the accordion will result in the
a thickness smaller than the width of the groove 20 and
emission of organ tones by the tone generator in syn 20 its rounded upper edge 22 has, preferably, a smaller
degree of curvature than that of the groove. Secured
chronism with the accordion. By means of a standard
at its rear end to the back of the panel 17, as by a
shift on the accordion, the bellows thereof may be cut in
contact screw or rivet 23, is a spring wire 24, maintained
or out so that the tones may be emitted by the tone gen
in substantially parallel relationship with the panel 17
erator alone or by both the latter and the accordion.
Another object of the present invention is the provi 25 by a spacer strip 25 and a spacer sleeve or washer 26 on
the screw. Actually, two additional spring wires 24a
sion of new and improved circuit-closing means for the
are mounted in the same plane as the wire 24 parallel
purpose mentioned above, whereby the construction of
with the panel 17, as in most cases each key closes three
the accordion including the switches is substantially sim
switches upon actuation of the key. Each slide 21 there
pli?ed while at the same time making the action of the
fore has three holes 27 therethrough, arranged in a row
accordion more positive, more effective and more dura
parallel with the lower edge 28 of the slide, and through
ble. Since the principle of construction and operation of
these holes the spring wires .24, 24a, 24a pass. Thus
the present switches is the same for both keys and but
the force of the spring wires in passing through these
tons, only the former are illustrated herein.
holes maintains the slide 21 in the raised position, FIG. 3,
A ‘further object of the invention is the provision of
improved means for closing the circuits between the 35 with its upper edge 22 registering in the groove 20 at the
back of the key. It is now apparent that, upon depress
actuating members or levers, i.e., the keys or the buttons,
ing the key 12, the slide 21 is moved downward and
of an accordion, whereby the switches are directly and
positively closed by the actuating levers themselves
through an intermediary member or plate continuously
urged into loose contact with the lever.
The above broad as well as additional objects will be
clari?ed in the following description wherein reference
numerals refer to like-numbered parts in the accompany
ing drawing. It is to be noted that the drawing is in
tended primarily for the purpose‘ of illustration and that
carries the free ends of the wires with it.
Spaced downward (FIG. 2) from the panel 17, a
second panel 29 is secured to the frame 11 in the same
plane as the panel v17. On the side of its upper (FIG. 2)
edge facing the key 12, this panel has a longitudinal strip
30 secured thereto, and relatively thin plate 31 extends
at right angles to the panel 29 and covers the upper edges
of both this panel and the strip 30, and, further, projects
it is therefore neither desired nor intended to limit the
invention necessarily to any or all of the exact details
shown or described except insofar as they may be
deemed essential to the invention.
beyond the panel 29 to provide an overhang 32; the strip
31 is secured to the strip 30 and the panel 29, as, for
7 FIG. 5 is a sectional view taken on the line 5--5 of
ferent planes in which they lie, with the three wires 34,
34a, 34a; the plane of the former is slightly closer to the
plane of the panels 17 and 29 than the plane of the
example, by gluing.
‘Behind each key 12 a spacer 33 is mounted against the
back of the panel 29‘ in alignment with the spacer 25, and
In the drawing: FIG. 1 is a view looking at the back
a spring wire 34, similar to the wire 24, is secured by a
of the keyboard of an electric accordion embodying the
screw or rivet 35, through a washer 36, to the back side
present improvements, with the back cover broken away,
of the panel 29. Thus, with the aid of the spacer 33, this
as seen on line 1-—1 of FIG. 2;
FIG. 2 is a sectional view taken on the line 2—-2 of 55 wire 34 is maintained normally in a position of parallelism
with the plane of the panel 29. As in the case of the
FIG. 1;
wire 24, there are also two other wires 34a, and these
FIG. 3 is a fragmentary enlargement of FIG. 2;
wires pass through longitudinal slots 37 in the overhang
_ FIG. 4 is a sectional View taken on the line 4—-4 of
32 of the plate 31. As shown in FIG.1, the three wires
FIG. 3 rotated through 180 degrees into upside-down
24, 24a, 24a are nearly in ‘alignment, except for the dif
position;
FIG. 3; and
FIG. 6 is a sectional view taken on the line 6-—6 of
latter. The extremities of one such row of wires, for
FIG. 3.
As shown in detail to the drawing, the numeral 10 65 example, the row 34, 34a, 34a, are deformed as at 38, so
that when, for example, the wire 24 is bent rearward by
indicates the base of the treble section of an accordion,
‘having the frame 11 of the treble section extending there—
depressing the key its extremity engages the deformed
extremity 38 of the wire 34, since the wires overlap, as
from at an angle. One of the keys of the treble sec
shown in FIGS. 1, 2 and 3. Each pair of opposed
tion is indicated at 12 and is, together with the other
keys, not shown, pivoted on. a longitudinal rod or axis 70 wires such as, for example, the pairs 24 and 34, 24a and
13. Each key is normally urged forward to its normally
inoperative position by a leaf spring 14, the free end of
340:, etc. together comprise a normally open switch.
Thus, as a key 12 is depressed, the key forces the slide
3,052,147
3
21 rearward to move the free ends of the wires 24, 24a,
24a rearward to engage the wires 34, 34a, 34a, respec
transversely to said rows and parallel to said ?rst array
from said second mounting means to said intermediate
tively, thus closing circuits, not shown, into the appropri
region in overlapping relationship with respective wires
ate tone-actuating or sounding means of the tone gen~
erator, not shown. Upon engagement of the wire 24,
for example, with the wire 34, the free end of the latter
is ‘free to be bent rearward by virtue of its riding in a
slot 37. During depression or" a key, as well as during
return of the key to normal position, the rounded ex
trcmity 22 of the slide 21 freely moves against the wall 10
of said ?rst array and in general alignment therewith
whereby a plurality of Wire pairs are formed alongside
of the groove with a minimum of friction.
one another, the wires of said second array being each
secured at one extremity to said second mounting means
while being freely displaceable relatively to said support
at the opposite extremity, the wires of each pair being
normally spaced apart in a direction transverse to the
planes of said arrays and being engageable with each
other upon a transverse displacement of said opposite
extremity of one wire toward said opposite extremity of
None of the circuits or connections by means of which
the closing of a switch, as above described, sounds a
tone or note in the tone generator is shown, as such tone
the other wire of the pair; a set of manually depressible
keys each disposed on said support with freedom of
individual displacement in said transverse direction and
generators ‘are ‘available on the market and the necessary
connections of the switch elements with the tone gener
ator terminals are readily made.
in positive engagement with said opposite extremity of
Wherever insulating material is indicated in the ac
said one wire of a respective pair vfor establishing tem
companying drawing, a suitable plastic material may be
porary contact between the wires of said respective pair;
used, but suitable wood, in solid or laminated form, may 20 circuit means connected to the wires of each pair for
be substituted wherever desired. In the case of the strip
actuating a sound generator upon establishment of said
temporary contact; and resilient means including said one
19, the same may also be made of ?ber or a some
what pliable plastic material or even felt, not shown.
wire maintaining each of said keys in ‘a normal posi
The switch-closing and switch-opening action result
ing from the above disclosure is positive, trouble-free, and
tion in which said one wire is disengaged from said
other wire.
simple, as well as inexpensive in manufacture.
It is to be noted that the strip 36 on the panel 29
could be considered as integral with the panel in the
3. In an electronic musical instrument, in combination,
a support; ?rst and second mounting means extending in
spaced-apart parallel rows across said support; a ?rst sub
stantially planar array of wires extending generally trans
form of a thickened edge; the same holds true for the
strip to on the panel 17.
30 versely to said rows from said ?rst mounting means to a
The invention having thus been described, what is
claimed and desired to be secured by Letters Patent is as
region intermediate said rows, the wires of said ?rst array
being each secured at one extremity to said ?rst mounting
follows:
means while being freely displaceable relatively to said
support at the opposite extremity; a second substantially
1. In an electronic musical instrument, in combina
tion, a support; ?rst and second mounting means extend 35 planar array of wires extending generally transversely to
said rows and parallel to said ?rst array of wires extend
in spaced-apart parallel rows across said support; a ?rst
ing generally transversely to said rows and parallel to
substantially planar array of wires extending generally
said ?rst array from said second mounting means to said
transversely to said rows from said ?rst mounting means
intermediate region in overlapping relationship with re
to a region intermediate said rows, the wires of said ?rst
array being each secured at one extremity to- said ?rst 40 spective wires of said ?rst array and in general alignment
therewith whereby a plurality of wire pairs are formed
alongside one another, said pairs being divided into a
plurality of groups, the wires of said second array being
mounting means while being freely \displaceable relatively
to said support at the opposite extremity; a second sub
stantially planar array of Wires extending generally trans
each secured at one extremity to said second mounting
versely to said rows and parallel to said ?rst array from
said second mounting means to said intermediate region 45 means while 1being freely displaceable relatively to said
support at the opposite extremity, the wires of each pair
being normally spaced apart in a direction transverse to
the planes of said arrays and being engageable with each
in overlapping relationship with respective wires of said
first array and in general alignment therewith whereby a
plurality of wire pairs are ‘formed alongside one another,
the wires of said second array being each secured at one
extremity to said second mounting means while being
freely displaceable relatively to said support at the oppo
other upon a transverse displacement of said opposite ex
tremity of one Wire toward said opposite extremity of the
other wire of the pair; a set of operating members each
disposed on said support adjacent a respective group of
site extremity, the wires of each pair being normally
wire pairs with freedom of individual displacement in
said transverse direction and in operative alignment with
said opposite extremity of said one wire of each pair of
the respective group for establishing temporary contact
between the wires of said respective group; and circuit
spaced apart in a direction transverse to the planes of said
arrays and being engageable with each other upon a
transverse displacement of said opposite extremity of one
wire toward said opposite extremity of the other wire
of the pair; a set of operating members each disposed
on said support with freedom of individual displacement
in said transverse direction and in operative alignment
means connected to the wires of each pair for actuating
a sound generator upon establishment of said temporary
contact.
with said opposite extremity of said one wire of a re
4. In an electronic musical instrument, in combina
tion, a support; ?rst and second mounting means extend
ing in spaced-apart parallel rows across said support; a
spective pair for establishing temporary contact between
the wires of said respective pair; and circuit means
connected to the wires of each pair for actuating a sound
generator upon establishment of said temporary contact.
2. In an electronic musical instrument, in combination,
‘a support; ?rst and second mounting means extending in
spaced-apart parallel rows across said support; a ?rst
01
?rst substantially planar array of wires extending gen
erally transversely to said rows from said ?rst mounting
means to a region intermediate said rows, the wires of
‘said ?rst array being each secured at one extremity to said
substantially planar array of wires extending generally
?rst mounting means while being freely displaceable rela
mounting means while being ‘freely displaceable rela
region in overlapping relationship with respective wires
tively to said support at the opposite extremity; a second
transversely to said rows from said ?rst mounting means
70 substantially planar array of wires extending generally
to a region intermediate said rows, the wires of said ?rst
transversely to said rows and parallel to said ?rst array
array being each secured at one extremity to said ?rst
from said second mounting means to said intermediate
tively to said support at the opposite extremity; a second
of said ?rst array and in general alignment therewith
substantially planar array of wires extending generally 75 whereby a plurality of wire pairs are formed alongside
3,052,147
one another, the wires of said second array being each
secured at one extremity to said second mounting means
while being ‘freely ‘displaceable relatively to said support
at the opposite extremity, the wires of each pair being
normally spaced apart in a direction transverse to the
planes or said arrays and being engageable with each
other upon a transverse displacement of said opposite
extremity of one wire toward said opposite extremity of
6
said pairs being divided into a plurality of groups, the
wires of said second array being each secured at one ex
tremity to said second mounting means while being freely
idisplaceable relatively to said support at the opposite ex
tremity, the wires of each pair being normally spaced
apart in a direction transverse to the planes of said arrays
and being engageable with each other upon a transverse
displacement of said opposite extremity of one wire to
ward said opposite extremity of the other wire of the pair,
the other wire of the pair, one of said opposite extremities
being bent in the plane of its array across the other of 10 one of said opposite extremities being bent in the plane
of its array across the other of said opposite extremities
said opposite extremities for contact therewith upon such
for contact therewith upon such transverse displacement;
transverse displacement; a set of operating members each
a set of manually depressible keys each disposed on said
disposed on said support with freedom of individual dis
support adjacent a respective group of wire pairs with
placement in said transverse direction and in operative
alignment with said opposite extremity of said one wire 15 [freedom of individual displacement in said transverse di
rection and in positive engagement with said opposite ex
of a respective pair for establishing temporary contact
tremity of said one wire of each pair of the respective
between the wires of said respective pair; and circuit
group for establishing temporary contact between the
means connected to the wires of each pair \for actuating
wires of said respective group; circuit means connected to
a sound generator upon establishment of said temporary
20 ‘the wires of each pair ‘for actuating a sound generator
contact.
upon establishment of said temporary contact; and re
5. In an electronic musical instrument, in combination,
silient means including said one wire maintaining each of
a support; ?rst and second mounting means extending in
said keys in a normal position in which said one wire is
spaced-apart parallel rows across said support; a ?rst sub
disengaged from said other wire.
stantially planar array of Wires extending generally trans-'
versally to said rows ‘from said ?rst mounting means to 25
a region intermediate said row, the wires of said ?rst ar
ray being each secured at one extremity to said ?rst
mounting means while being vfreely displaceable relatively
References Cited in the ?le of this patent
UNITED STATES PATENTS
to said support at the opposite extremity; a second sub
2,250,065
stantially planar array of wires extending ‘generally trans
2,587,458
Fritts ________________ __ Feb. 26, 1952
versely to said rows and parallel to said ?rst array from
said second mounting means to said intermediate region
2,736,223
2,931,877
2,932,232
Seybold ______________ __ Feb. 28, 1956
Henley _______________ __ Apr. 5, 1960
Minervini ____________ __ Apr. 12, ‘1960
2,949,803
Leslie ______________ __ Aug. 23, 1960
in overlapping relationship with respective wires of said
?rst array and in general alignment therewith whereby
a plurality of wire pairs are formed alongside one another, 35
Koehl _______________ __ July 22, 1941
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