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Патент USA US3056336

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Oct. 2, 1962
R. SEYBOLD
3,056,326
TIMBRE-SELECTOR FOR A MUSICAL SYNTHESIZER
Filed June 11. 1958
INVENTOR
RENE SEYBOLD
ATTORNEY.
United States Patent O?lice
1
3,056,326
TlMBRE-SELECTOR FOR A MUSICAL
3,056,326
Patented Oct. 2, 1962
2
twenty-three different circuits which can be closed and
opened by twenty-three pairs of contacts. These twenty
three circuits are divided into ?ve groups, each of which
SYNTHESIZER
only comprises circuits including the contact pole pairs
Rene Seybold, 4 Blvd. Jacques Preiss, Strasbourg
of elements which do not exert any influence on one an
(Bas-Rhin), France
Filed June 11, 1958, Ser. No. 741,377
other.
In order to arrange these groups, it is important
that their inherent characteristics should be taken into
2 Claims. (til. 84-119)
consideration.
The present invention relates to a timbre-selector for
Whereas, in this embodiment, group I only includes
music synthesizers wherein the desired timbres are ob 10 three contacts, the number of contacts forming the other
tained by means of push-buttons, stops or other similar
groups is somewhat higher. But the number of groups,
members.
as well as that of the contacts which form them may also
It is known that in order to obtain a desired timbre, a
be considerably higher. In groups I to V, the pairs of con
plurality of push-buttons have to be actuated. In view of
tacts are, respectively, designated by the numerals 1 to 6.
the relatively large number of push-buttons which an 15
The contacts v1 to 6, arranged in pairs, are housed in
instrument generally comprises, the selection of the push
bars of insulating material 10 and 10a, from which they
buttons corresponding to a desired timbre is rendered diffi
emerge with their free ends 9 bent perpendicularly up‘
cult, particularly as it depends solely on the memory of
wards, the ends serving as connecting wires. For the
the performer. Moreover, this selection always causes a
circuits comprising resistors, capacitors 11, etc., clips 9a
20
certain waste of time giving rise, each time, to an unde
are provided on the insulating bar 10a to retain these
sirable disturbance in the musical presentation.
members.
In order to simplify the manipulation of the instrument
The free ends of the contacts 11 to V4 rest in a resilient
considerably, one solution provides for each of the timbres
manner on the composition cylinder 12‘ of insulating ma
to be selected, a single push-button acting simultaneously
on all the contacts facing it, in order to close each of 25 terial.
The surface of the cylinder 12 is provided with narrow
longitudinal grooves '15 which are directed parallel to the
axis of the cylinder 12. The number of the grooves 15
Such a construction would, in fact, mean that if one and
corresponds to that of the timbres to be selected, namely
the same circuit had to enter into the composition of a
twenty-two, by example. Each of the grooves ‘15 includes
30
plurality of timbres, such circuit would have to be con
a given number of conducting bridges .16, that is to say a
nected to the contacts of all the circuits which are neces
number which corresponds exactly to that of the contacts
sary to produce the synthesis of the desired timbres. This
which have to be connected to produce the synthesis of a
would involve the use of a large number of contacts and
single one of the timbres. This simple arrangement per
the corresponding circuits simultaneously.
However, this proposal is hardly workable in practice.
conducting wires for each timbre which is undesirable in
view of the fact that coupling and disturbances would re
sult between the various circuits and might render impos
sible a clear reproduction of sound, that is to say repro
mits the simultaneous closing of all the circuits included
in the composition of a selected timbre and FIG. 1 shows,
by means of the arrows A—-A, a position of the composi
tion cylinder 12 in which the circuits leading to the con
duction without distortion. Thus, for example, if in order
tacts I2, H3, 1113 and V1 are closed. Upon advancing the
to obtain the synthesis of a single desired timbre, it is 40 cylinder 12 to the next groove 15, it will be the circuits
necessary to have recourse to seven circuits, for twenty
ll, H3, 1V5 and V4 which are closed, and so on.
two timbres it would be necessary to have recourse to
The conducting bridges 16 only project very slightly
22 ><7=154 circuits with their contacts.
from the surface of the cylinder 12 in such manner that
It is, therefore, one object of the present invention to
the resistance to be overcome during the rotation of the
provide a timbre selector for a musical synthesizer which 45 cylinder is reduced to a minimum. The only resistance
is based on knowledge of these facts and indicates a new
opposed to the rotation of the cylinder 12 is that resulting
means which avoids all the mentioned disadvantages.
from the sliding of the contacts over the periphery of
It is another object of the present invention to provide a
the cylinder and over the contact bridges; this resistance
timbre-selector for keyboard musical synthesizers which,
for a plurality of circuits necessary in order to obtain a 50
predetermined number of timbres, comprises a single con
tact for each circuit and, in addition, at least one member
extending over the contacts of all the circuits and permit
ting the circuits corresponding to each of the timbres to
be selected and closed.
With these and other objects in view, which will be
come apparent in the following detailed description, the
present invention will be clearly understood in connection
with the accompanying drawings, in which:
FIGURE 1 is an elevation of a timbre-selector, the
main member of which consists of a composition cylinder;
FIG. 2 is an enlarged section along the lines 2-—2 of
FIG. 1;
FIG. 3 is an elevation of a part of the composition
cylinder disclosed in FIG. 1, the control for which con
sists of a selector disc;
FIG. 4 is a front view of the selector disc;
FIG. 5 is an axial section along the lines 5-5 of FIG.
6; and
FIG. 6 is a front view of a component member of the
composition cylinder.
Referring now to the drawings, in the ?rst embodiment
illustrated in FIGS. 1 and 2, the timbre-selector comprises
is useful because it ensures a good frictional contact.
It should be noted that the grooves 15 may follow one
another very closely in such a manner that a relatively
large number of grooves may be provided on a cylinder of
relatively small diameter and that a rotation of a very
small amplitude is sufficient to advance the cylinder from
one position to the following position.
The control of the composition cylinder '12 may be ef
fected in various manners:
According to the embodiment disclosed in ‘MG. 1, the
control member for the cylinder 12. consists of a knurled
control disc 13 ?xed to the shaft of the cylinder 12. A
ratchet wheel 14 which cooperates with a suitable pawl
M’, such as a spring-biased ball, serves to arrest the cylin
der 12 in each contact position.
In order to permit a very rapid and precise selection to
be made, the control disc 13 for the composition cylinder
.12 may advantageously be provided with a series of aper
tures in the manner of a telephone dial, as shown in
FIGS. 3 and 4. According to the embodiment disclosed
in FIGS. 3 and 4, two discs 45 and 46 are ?xed to the
70 shaft 44 of the composition cylinder 40, the outer disc 45
being provided with apertures 47 while the inner disc 46
bears the designation of a timbre to be selected, opposite
aosaaae
3
each of the apertures 47. A ?xed stop
is provided in
the path travelled by the apertures 47. If a ?nger is in
trcduced into a selected aperture 47 and the disc 45 is
then turned until the ?nger abuts against the stop 43, the
comprises assembly means such as studs (FIG. 5) and
corresponding recesses (FIG. 6) on their lateral faces.
While I have disclosed several embodiments of the
present invention, it is to be understood that these embodi
ments are given by example only and not in a limiting
cylinder 40 occupies exactly the position corresponding
to the desired timbre. This arrangement does not permit
the disc 45 to be turned in both directions. FIG. 4 shows
sense, the scope of the present invention being determined
by the objects and the claims.
an example in which the stop 48 may be displaced between
I claim:
two limits represented by two ?xed stops 49 and 54}. The
amplitude of this displacement corresponds to the divi 10 mg1. A timbre-selector for a music synthesizer compris
sion of one aperture. This arrangement, in contrast to
a composition cylinder rotatably supported and hav
the ?rst, permits the disc 45 to be turned in both direc
tions. In the example illustrated, the timbre selected is
on
ing its
a plurality
peripheryof and
axially
angularly
disposedspaced
grooves
apart
arranged
from/”
,
that which corresponds to the aperture 47“. When this
each
other,
timbre has to be replaced by the timbre which corre 15
a plurality of conducting bridges selectively disposed
sponds to the aperture 47", the disc
must he turned
in each of said grooves axially spaced apart from
in clockwise direction. When, on the other hand, this
each
other and extending beyond the periphery of
same timbre has to be replaced by that corresponding to
said composition cylinder,
the aperture 47"’, the disc 45 is preferably turned in the
a pair of contacts engaging the periphery of said com
opposite direction until the lever 43 is stopped by the stop
position cylinder and coordinated to all of said con~
56 (see the position shown in dash dotted lines).
ducting bridges disposed in said grooves in a plane
FIG. 3 also illustrates an additional advantageous mas
perpendicular to the longitudinal axis of said com
ter control mechanism which could also be used for other
position cylinder, to close a plurality of circuits
embodiments such as that shown in FIGS. 1 and 2. This
through
all said pairs of contacts disposed in the
mechanism comprises for each circuit a second pair of
same of said grooves by the corresponding of said
contacts 32 which is coupled directly to the ?rst pair of
engaged conducting bridges dependent upon the ro
contacts 22 and which is controlled by a push-button 36
provided with a contactor bridge 31.
tary position of said composition cylinder, and
means for turning said composition cylinder into any
This device en
ables any pair of contacts to be connected, at will, by
means of the push-buttons 130‘, in such a manner, that any
desired combinations can be established apart from those
predetermined rotary position.
"
rendered possible by the selector. In order to take ad
vantage of this possibility, it is su?icient to actuate the
pushbuttons 31)‘ in correspondence with the desired timbre
a control member for said composition cylinder com
prising a knurled disc secured to said shaft,
a ratchet wheel keyed to said shaft, and
and not to operate the knobs 128.
If the latter device is combined with the selector of
a pawl disposed adjacent to and cooperating with said
shaft, in order to arrest said composition cylinder
FIGS. 1 and 2, it would be necessary to provide a neu
tral position on the composition cylinder 12, that is to
say a position in which the corresponding groove 15 does
not include any conducting bridges.
It goes without saying that whatever the form of con
struction of the selector, the master control mechanism
may be used jointly with any selector mechanism.
It should also be noted that as shown in FIGS. 5 and 6,
the composition cylinder 46, instead of being constructed
integrally, may consist of a plurality of individual mem
bers 41 which, as shown in FIGS. 5 and 6, are in the form
of discs provided on their periphery with grooves 42 to
receive the conducting bridges 43 or the like and which
2. The timbre-selector, as set forth in claim 1, which
includes
a shaft carrying said composition cylinder, and
in each contact position.
40
References Cited in the ?le of this patent
UNITED STATES PATENTS
836,827
136L006‘
1,793,592
Pool ________________ __ Nov. 27, 1906
Brown _______________ __ Dec. 7, 1920
Davis _______________ __ Feb. 24, 1931
1,956,350
2,049,616,
Hammond ____________ __ Apr. 24, 1934
Lilja _________________ __ Aug. 4, 1936
2,250,066
Manatt ______ __-______ __ July 22, 1941
2,455,032
Williams ____________ __ Nov. 30, 1948
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