close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3095069

код для вставки
June 25, 1963
J. H. HEARNE
3,095,059
TONE CABINETS
Filed Jan. 3, 1961 '
2 Sheets-Sheet 1
@
June 25, 1963
J. H. HEARNE
3,095,059
TONE CABINETS
Filed Jan. 3, 1961
2 Sheets-Sheet 2
IN VEN TOR.
United States Patent 0 "
1
3,095,059
Patented June 25, 1963
2
FIG. 3 is a fragmentary, vertical cross-sectional view
of the tone cabinet of FIG. 1;
FIG. 4 is a front elevational view of the tone cabinet
of FIG. 1 showing the ‘01051.11‘6 means in one position;
FIG. 5 is a view similar to the showing of FIG. 4
but illustrating the closure means in a different position;
FIG. 6 is a View similar to the showing of FIG. 2,
3,095,059
TONE CABINETS
Joseph H. Hearne, Corinth, Miss, assignor to The Wur
litzer Company, Chicago, 111., a corporation of Ohio
Filed Jan. 3, 1961, Ser. No. 80,258
12 Claims. (\Cl. Isl-31)
This invention relates generally to tone cabinets and
particularly illustrating the drive means being ‘re-arranged
especially to tone cabinets arranged to impart vibrato
for reverse rotation of the closure means; and
to produced sounds.
FIG. 7 is a perspective View of the closure means cou
10
In one speci?c aspect, the present invention relates to
pled to form a rotor ‘assembly.
tone cabinets for imparting vibrato to the sounds gen~
Referring now in detail to the drawings, speci?cally
erated by an electronic organ although the invention is
to FIG. 1, a tone cabinet indicated generally by the nu
not limited to such use.
The sounds or notes produced by an electronic organ,
meral It; will be seen to include a horizontal platform
12. A bass register loudspeaker or electroacoustic trans
ducer 14 is mounted on platform 12 with its output
unless modi?ed to impart vibrato, are uninteresting to
most listeners. Accordingly, various schemes have been
devised for enriching with vibrato the sounds or notes
generated by a electronic organ. Electronic means have
end opening in a generally downward direction through
a hole fashioned in the platform. A backsloading en
closure Ior ba?le 16 is mounted in super position to the
been developed for periodically altering the pitch and/ or 20 platform 12 surrounding the loudspeaker l4. Baffle 16
amplitude of the tones. However, these means ordi
narily fail to take into consideration the third important
aspect of vibrato, namely the periodic variation of that
complex tonal attribute generally referred to as timbre.
Strictly electronically produced vibrato is therefore in
and loudspeaker 14 may comprise either a bass re?ex
or an acoustic suspension arrangement.
The loudspeaker 14 is arranged to receive signals
from an electronic organ, not shown; and in accordance
25
with conventional practice, the output of the electronic
organ is split in mid-range by a dividing network, the
lower frequencies being conducted to the loudspeaker 14
ties have also been developed for imparting vibrato to
and the higher frequencies being conducted to a treble
produced sounds. These mechanical means include such
register loudspeaker or electroacoustic transducer 1%.
devices as revolving horns and rotating vanes. How 30 The signals which are conducted to the loudspeaker 14
ever, these prior art ‘devices do not produce satisfactory
and to the loudspeaker 1-8 respectively are desirably pro
variations in timbre; and hence, the vibrato which has
vided with ‘a degree of overlap or common frequency
heretofore been produced acoustically, like the elec
range, as is well known. Loudspeaker 18 is advanta_
tronically produced vibrato, is inclined to be shallow be
geously mounted to baffle 16 in the position illustrated.
cause of the lack of appreciable variations in timbre.
Platform 12 de?nes the top of a front battle or en
Therefore, a ‘general object of the present invention
closure 20, enclosure as also including side walls 22,
is to provide new and improved means for imparting
back wall 24 and an open side 26. A ?oor 28 is ad
vibrato to produced sounds.
ditionally provided, and a partition so is provided clos—
Another object of thetinvention is to provide means
ing off the lower portion of open side 26. Since en
for imparting a vibrato rich in timbre variations.
closure 20 is intended to form a pipe resonator a ver
Yet another object of the invention is to provide means
tical partition 32 is mounted within the enclosure to
for incurring variations in all three components of vibrato,
bisect the enclosure along a central axis perpendicular
namely frequency, amplitude and timbre.
to the open side 26. As is shown in FIG. 2, partition
A further object of the invention is to provide means
32 extends into contact with partition 30 but terminates
45
for incurring more rapid vibrato in the higher frequency
short of the floor 28. Thus, the pipe resonator de?ned
sounds than in the lower frequency sounds.
by enclosure 29 is fashioned with one end folded back.
Additional objects and features of the invention per
A crosspiece or transom strip 34 is advantageously ?xed
tain to the particular structure arrangements whereby
across open side 26 adjacent the platform 12.
the above objects are attained.
In accord with the invention, closure means are pro
A structure in accord with the invention includes
vided for the two apertures 36', 38' de?ned on the op
clined to be somewhat shallow.
Mechanical mean-s employing the principles of acous
means de?ning a resonant air column including a pipe
having apertures spaced apart along the effective length
of the air column; means generating sound for driving
the column; and stop means for the column including
closure rneans for each of the apertures, each of the
closure means being movable in a cycle for variously
obstructing the corresponding aperture, each of the
closure means being further related to the other closure
posite sides of partition 32 in the open side 26 of en
closure 20; and these closure means speci?cally com
prise a pair of panels or vanes 36 and 38. The vanes
36 and 38 are combined in a rotor assembly by hav
ing pivot pins 46) ?xed extending outwardly from the
edges of the panels aligned with a central ‘axis thereof,
the panels being disposed at right angles to each other
at this axis, as is generally indicated in the several fig
means in ?xed, acoustic phase, cyclical operation of the
ures. Furthermore, journal brackets 42 are at?xed to
closure means continuously varying the elfective length 60 the side walls 22 and to the partition 32 for receiving
the pins 40 and rotatably mounting the panels 36 and
of the resonant column for producing vibrato eifects.
In order that the principles of the invention may be
38 with respect to the open side 26 of enclosure 26.
Panels 36 and 38 are spaced apart along the rotational
axis so as to avoid colliding with partition 32.
to an electronic organ, but to which the application is not
65
In order to cycle the closure means through various
to be restricted, is shown in the accompanying drawings
aperture-obstructing positions, drive means ‘are provided
wherein:
including an electric motor 44, a small diameter pulley
FIG. 1 is a perspective view of a tone cabinet con
46 fixed to the output shaft of motor 44, 1a large diameter
structed in accordance with the invention;
pulley
48 ?xed to a pivot pin 46*, and a ?exible drive.
FIG. 2. is a side elevational view of the tone cabinet 70
belt 50 connecting the pulleys 46 and 48. Motor 44 is
of FIG. 1, partially broken away to reveal interior de
advantageously mounted to the upper surface of platform
readily understood, a single embodiment thereof applied
tails;
12 adjacent ba?le ‘1‘6; and under certain circumstances,
3,095,059
3
.
it has proved desirable to protect the pulleys and drive
belt with a shroud, not shown. Moreover, it is within
the comprehension of the invention to substitute a single
shaft for the several pivot pins 4t}. Motor 44 is advan
tageously arranged to provide a constant speed‘ drive.
which is de?ned by enclosure 2b is in a state of continual
variation. When the pipe takes its longest e?ective length,
Being intended to act as a pipe resonator, enclosure
the lower frequency radiations and the lower harmonics
from loudspeaker 14 are reinforced whereas the higher
frequencies and higher harmonics are not appreciably re
inforced. When the pipe takes its shortest effective length,
26' is desirably fabricated ‘from hard, sound-reflective
the higher frequency radiations and the higher harmonics
materials, for example highly polished hardwoods, the
are bene?tted by the reinforcement.
Hence, the con
tinuous alteration of the effective length of the resonant
interior surfaces of the enclosure, the ?oor 2.8 and the
surfaces of vanes 3e and 38 being particularly critical in 10 air column tends to alter the harmonic enrichment of the
over all output, thereby providing the variations in wave
this regard. In addition, the dimensions of enclosure 2%,
form which are necessary to achieve variations in timbre.
especially insofar as they determine the effective length of
A full-bodied vibrato results.
the resonant air column, are selected to accommodate the
Similarly, as the length of the path which the radia
lowest frequencies which are intended to be reproduced,
the path length being a function of the wave length of the 15 tions from loudspeaker 1d traverse varies ‘from the two
sound, as is well known.
For purposes of affording a more complete understand
extreme positions, a phase shift is evident because of the
time consumed while the wave is travelling the length of
the pipe. There results a pitch or frequency variation.
ing of the invention and in order to point out the sig
Thus, the vibrato ‘effects imparted to the output radia
ni?cance of the desired arrangements, it is advantageous
now to provide a functional description ‘of the mode in 20 tions from loudspeaker 14 comprise variations in timbre
as well as variations in amplitude and frequency.
which the component parts cooperate.
It is to be noted that a complete cycle, i.e. a change
The closure means de?ned by vanes 36 and 38 are ar
ranged to take two extreme positions, and these two ex
treme positions are shown respectively in FIGS. 4 and 5.
from one extreme position to the other and back to the
starting condition, is achieved by rotating the closure
In FIG. 4, the vane 36 is shown completely unblocking its 25 means through an arc of 180“. Since the normal vibrato
rate is seven cycles per second, it is therefore advan
respective aperture whereas vane 33 is in completely ob
tageous to drive the rotor assembly at a speed of approxi
structing position. FIG. 4 illustrates the maximum effec
mately 3.5 revolutions per second. Moreover, a close fit
tive length of the resonant air column wherein sound
between the respective vanes and the surrounding aperture
waves emanating from loudspeaker 14- are directed down
wardly between back wall 24- and vane 38 and across the 30 de?ning members has been found to produce sharper
effects.
floor 28 to ‘emerge on either side of vane 36.
Ideally, the vibrato rate is increased for the higher fre
With particular reference to FIG. 2, it will be observed
quencies; and the present invention makes provision for
that, in its aperture-unblocking condition, vane 36 ter
doubling the vibrato rate for the higher frequencies as
minates at a point substantially spaced apart ‘from the
back wall 24. Thereby, some part of the radiations from 35 compared with the vibrato rate for the lower frequencies.
Speci?cally, the treble register loudspeaker 18 is situated
loudspeaker ‘1d are passed out of enclosure 20 from a
in alignment with the confronting edges of vanes 36 and
position above the vane 36 ‘although the bulk of the radia~
38 as is well shown in FIGS. 4 and 5, the loudspeaker 18
tions emanate from beneath the vane 36 as is generally
indicated in FIG. 2 by the arrows 52. This arrangement
being located outside of the resonant air column de?ned
of the length of vane 36 is likewise followed for vane 38.
by enclosure 20, as is illustrated. By means of this ar
By permitting some of the sound waves to emerge
rangement, the vanes 36 and 38 are exposed to the direct
from a position above the vane 36 while the bulk emerges
radiations 53, shown in FIGS. 2 and 3, from loudspeaker
from a position below the vane 36, a certain amount of
18. Re?ection from the moving vanes affords variations
time-spacing of the signals is achieved, a slightly reduced
in amplitude and also variations in frequency due to a
frequency being experienced by those radiations emanat
Doppler effect. Since the radiations from loudspeaker 18
ing ‘from above the vane 36 due to the extension of the
traveled path. The average effect of this arrangement is
rate for the higher frequency radiations is substantially
are directed at both of the vanes, the effective vibrato
a harmonic enrichment or alteration of the wave form
double the vibrato rate for the lower frequency radiations
which is eventually received by a listener.
from loudspeaker 14.
FIG. 5 illustrates the second extreme position of the 50
A further modi?cation in the character of the vibrato
closure means; and there, vane 36 will be seen com
can be achieved by reversing the direction in which the
pletely closing off its respective aperture whereas vane 38
closure means are rotated. In FIGS. 1 thru 5, the rotor
is in unblocking condition. This represents the minimum
‘assembly is arranged to be driven in the direction indi
length resonant air column; and like the maximum col
cated by arrow 54 in FIG. 3 whereas, in FIG. 6, the rotor
umn length conditon, radiations emanating ‘from the loud 55 assembly is arranged to be driven in the direction indi
speaker 14 are permitted to emerge from both beneath
cated by arrow 56. This alteration in the direction of ro
and above the vane 38 whereby to provide harmonic en
tation is achieved by crossing the belt 50, as is shown in
richment.
FIG. 6, or by other suitable means.
Moreover, when the vanes are positioned as illustrated
The present invention ?nds its principal utility in con
in FIG. 5, vane 38 is partially exposed to direct radiation
junction with electronic organics although it has other de
vfrom the loudspeaker :14; and since the vanes are in con
sirable uses, such as for example in providing novel effects
tinuous motion, the waves re?ected from the surface of
to a recorded voice. Therefore, the speci?c example here
vane 38 variously reinforce ‘and cancel the output of the
in shown and described should be considered as illustra
loudspeaker 14. Thus, there is achieved an alteration in
tive only. Various changes in structure may occur to
the amplitude of the output from the tone cabinet as vane 65 those skilled in the art; and these changes are to be under
38 moves relative to the loudspeaker 14. In this regard,
stood as forming a part of this invention insofar as they
it is important to note that the provision of a sound path
fall within the spirit in scope of the appended claims.
between the back wall 24- and the inwardly extending
The invention is claimed as follows:
edge of vane 38 prevents the amplitude variations from
1. Apparatus for modifying the character of sound
passing through a zero condition, i.e. the output wave 70 waves, said apparatus comprising: means de?ning a reso
of loudspeaker 14 is, in effect, modulated by the varia
nant air column including a pipe having a plurality of gen
tions in the amplitude signal.
erally radially opening apertures spaced apart along the
It will become apparent that, as the vanes 36 and 38
are rotated and continuously move from one extreme posi
effective length of said column intermediate the ends
thereof; sound generating means disposed at one end of
tion to the other, the resonant frequency of the air column 75 said column and operatively connected thereto for driving
3,095,059
5
said column and operatively connected thereto for driv
ing said column; and stop means connected to said col
umn-de?ning means, including closure means for each of
said apertures, each of said closure means being movable
in a cycle for variously obstructing the corresponding
aperture.
2. Apparatus for modifying the character of sound
waves, said apparatus comprising: means de?ning a reso
nant air column including a pipe having a plurality of
6
closure means continuously varying the effective length
of said resonant column and continuously varying the cou
pling of said treble register sound to the air for producing
vibrato effects.
6. Apparatus according to claim 5 wherein said means
generating sound in the bass register include ‘bass loud
speaker and a ba?le enclosure.
7. Apparatus for modifying the character of sound
generally radially opening apertures spaced apart along
waves, said apparatus comprising: means de?ning a reso
10 nant air column including a pipe having at least one end
the effective length of said column intermediate the ends
thereof; sound generating means disposed at one end of
folded back, said pipe having a plurality of generally
radial opening apertures spaced apart along the effective
said column and operatively connected thereto for driving
length of said column intermediate the ends thereof and
said column; and stop means connected to said column
disposed physically adjacent to each other; bass register
de?nin-g means, including closure means for each of said 15 sound generating means disposed at one end of said col
apertures, each of said closure means being related to the
umn and operatively connected thereto for driving said
other closure means in ?xed phase, cyclical operation of
column; stop means connected to said column-de?ning
said closure means continuously varying the effective
means, including closure means for each of said aper~
length of said resonant column ‘for producing vibrato
\tures, each of said closure means being moveable in a
effects.
20 cycle partly within and partly outside said column for
3. Apparatus for modifying the character of sound
waves, said apparatus comprising: means de?ning a reso~
nant air column including a pipe having at least one end
folded back, said pipe having a plurality of generally ra
dially opening apertures spaced apart along the eifective
variously obstructing the corresponding aperture, each of
said closure means being related to the other closure
means in ?xed, acoustic phase; and treble register sound
generating means ?xed with respect to said column-de
25 ?ning means and focused into the path of movement of
length of said column intermediate the ends thereof and
disposed physically adjacent to each other; sound generat
said closure means to impinge the treble register sound
ing closure means for each of said apertures, each of said
closure means ‘being moveable in a cycle for variously ob
structing the corresponding aperture, said stop means com
of said treble register sound to the air for producing vi~
brato effects.
‘Waves on generally adjacently disposed edge portions of
ing means disposed at one end of said column and oper
said closure means, cyclical operation of said closure
atively connected thereto for driving said column; stop
means continuously varying the effective length of said
means connected to said column~de?ning means, includ 30 resonant column and continuously varying the coupling
8. Apparatus for modifying the character of sound
prising a rotor assembly having a rotatable, axis-de?ning
waves, said apparatus comprising: means de?ning a reso
means and a plurality of flat vanes centrally ?xed to said 35 nant air column including a pipe having a plurality of
axis-de?ning means, said vanes being disposed perpendic
generally radially opening apertures spaced apart along
ular to each other at said axis-de?ning means, each of
the effective length of said column intermediate the ends
said vanes de?ning a said closure member; and drive
thereof and disposed physically adjacent to each other;
means mechanically coupled to said axis-de?ning means
means generating sound in one register, said last men
operable to rotate said closure means in a selected direc 40 tioned means being disposed at one end of said column
tion, cyclical operation of said closure means continu
ously varying the effective length of said resonant column
for producing vibrato effects.
4. Apparatus for modifying the character of sound
waves, said apparatus comprising: means de?ning a reso
nant air column including a pipe having a plurality of gen
erally radially opening apertures spaced apart along the
effective length of said column intermediate the ends
thereof; sound generating means disposed at one end of
said column and operatively connected thereto for driv
ing said columns; and stop means connected to said col
umn-de?ning means, including closure means for each of
said apertures, each of said closure means being movea'ble
in a cycle for variously obstructing the corresponding
aperture, each of said closure means being related to the
other closure means in a ?xed, acoustic phase of 180°,
operatively connected thereto for driving said column;
stop means connected to said column-de?ning means, in
cluding closure means for each of said apertures, each of
said closure means being moveable in a cycle partly with
in and partly outside said column for variously obstruct
ing the corresponding aperture, each of said closure
means being related to the other closure means in ?xed,
acoustic phase; means generating sound in another reg—
ister, said last mentioned means being operatively con
nected to said column-de?ning means external to said
pipe and focused into the path of said closure means out
side of the con?nes of said column; and drive means me
chanically coupled to said closure means and operable to
rotate said closure means in a selected direction, cyclical
operation of said closure means continuously varying the
effective length of said resonant column and continuously
cyclical operation of said closure mean-s continuously
varying the coupling of the sound in said other register
varying the effective length of said resonant column for
for producing vibrato effects.
producing vibrato effects.
9. A tone cabinet comprising: a loudspeaker; a back
5. Apparatus for modifying the character of sound 60 baffle enclosure connected to the rear portion of said
waves, said apparatus comprising: means de?ning a reso
loudspeaker in housing relationship therewith; a front
nant air column including a pipe having a plurality of
generally radial opening apertures spaced apart ‘along the
ba?le enclosure connected to said loudspeaker and open
to the sound waves emanating therefrom, the axis of said
eifective length of said column intermediate the ends
loudspeaker being disposed parallel to and spaced apart
thereof; bass register sound generating means disposed at 65 from a central axis of said front ba?le enclosure, said
one end of said column and operatively connected thereto
front bai?e enclosure having an open side adjacent the
for driving said column; stop means connected to said
output end of said loudspeaker; a ?rst partition closing
column-de?ning means, including closure means for each
off a portion of said open side opposite said loudspeaker;
of said apertures, each of said closure means being move
a second partition bisecting said front baffle enclosure
able in a cycle partly within and partly outside said col 70 along said central axis perpendicular to‘ said open side,
umn for variously obstructing the corresponding aperture;
said second partition extending into contact with said
and treble register sound generating means ?xed with re
?rst partition and terminating short of the end of said
spect to said column-de?ning means external to said col
front ba?le enclosure opposite said loudspeaker; a ?rst
umn and focused into the path of movement of said clo
panel rotatably mounted selectively to close said open
sure means outside said column, cyclical operation of said 75 side on one side of said second partition; a second panel
3,095,059
7
rotatably mounted selectively to close o? said open side
on the ‘other side of said second partition; and drive
means mechanically coupled to said ?rst and second
panels for rotating said panels about a common axis.
:1 back ba?‘le enclosure connected to the rear portion of
10. A tone cabinet according to claim 9 wherein the
of said loudspeaker being disposed parallel to and spaced
radial length of said panels is less than the depth of said
front ba?le enclosure.
11. A tone cabinet comprising: a loudspeaker; a back
ba?‘le enclosure connected to the rear portion of said
loudspeaker in housing relationship therewith; a front
battle enclosure connected to said loudspeaker and open
to the sound waves emanating therefrom, the axis of said
loudspeaker being disposed parallel to and spaced apart
from a central axis of said vfront baffle enclosure, said
front ba?le enclosure having an open side adjacent to the
said loudspeaker in housing relationship therewith; a
front ba?ie enclosure connected to said loudspeaker and
open to the sound waves emanating therefrom, the axis
apart from a central axis of said front ba?ie enclosure,
said front ba?’le enclosure having an open side adjacent
to the output end of said loudspeaker; a ?rst partition
closing off a portion of said open side opposite said loud
speaker; a second partition bisecting said front baf?e en
closure along said central axis perpendicular to said open
side, said second partition extending into contact with
said ?rst partition and terminating short of the end of
said front ‘baffle enclosure opposite said loudspeaker; a
15 ?rst panel rotatably mounted selectively to close said
open side on one side of said second partition; a second
output end of said loudspeaker; a ?rst partition closing
off a portion of said open side opposite said loudspeaker;
a second partition bisecting said front baf?e enclosure
along said central axis perpendicular to said open side,
said second partition extending into contact with said
?rst partition and terminating short of the end of said
front baf?e enclosure opposite said ‘loudspeaker; a ?rst
panel rotatably mounted selectively to close off said open
side on one side of said second partition; a second panel
rotatably mounted selectively to close off said open side
on the other side of said second partition, said panels
further being disposed at right angles to each other; and
panel rotatably mounted adjacent said ?rst panel selec
tively to close off said open side on the other side of said
20
second partition; drive means mechanically coupled to
said ?rst and second panels for rotating said panels about
‘a common axis; and a high-frequency loudspeaker ?xed
with respect to said ‘front bai?e enclosure, the output end
of said high-frequency loudspeaker opening toward ad
jacent edges of said panels.
References Cited in the ?le of this patent
UNITED STATES PATENTS
drive means mechanically coupled to said ?rst and sec
ond panels for rotating said panels about a common axis.
» 2,450,139
Hartsough __________ _._ Sept. 28, 1948
2,780,302
George ______________ _._ Feb. 5, 1957
12. A tone cabinet comprising: a bass loudspeaker;
2,847,081
Santi _______________ _._ Aug. 12, 1958
Документ
Категория
Без категории
Просмотров
0
Размер файла
803 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа