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Патент USA US3082849

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March 26, 1963
J. E. wHlTcAs
_
3,082,839
HIGH-FIDELITY LoUDsPEAKER SYSTEM
Filed March 27, 1959
`
43
42.
lll I
_
2 sheets-sheet 1
lMarch 26, 1963
J. E. wHrrcAs
3,082,839
HIGH-FIDELITY LouDsPEAKER SYSTEM
Filed March 27, 1959
2 Sheets-Sheet 2
32
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28
l9b
5
United States Patent O
1C@
Patented Mar. 26, 1963
1
2
3,082,839
FIG. 3 is a horizontal sectional view taken along the
lines 3--3 in FIG. 2;
HIGH-FIDELITY LOUDSPEÀKER SYSTEM
`loseph E. Whitcas, South Merchantville, NJ.
(416 Yale Ave., Cherry Hill, NJ.)
Filed Mar. 27, 1959, Ser. No. 802,499
1?» Claims. (Cl. 181-31)
This invention relates to loudspeaker systems of the
high-fidelity type and has for an object the provision of
a relatively small loudspeaker cabinet which is tubular
in shape having mounted in the side wall thereof a rela
tively long, narrow loudspeaker so as to provide accurate
and natural sound reproduction from the system over a
wide frequency range.
3,082,839
ri
FIG. 4 is an enlarged rear elevational View of the em
bodirnent shown in FIG. l;
FIG. 5 is a modification of the invention; and
FIG. 6 is an enlarged sectional view taken along the
lines 6_6 in FIG. 5.
Referring to FIG. 1, there is shown a table lamp 10
the base of which‘comprises a high-fidelity loudspeaker
cabinet 11 embodying the present invention. »Projecting
from the upper or top end of the cabinet or -base 11 is
an electrical fixture 12 which is adapted to support a suit
able shade 13.
t
Referring to FIG. 2 the cabinet 11 includes an inner
~
It is another object of the invention to provide an ar 15 tubular member 14 which is cylindrical in shape and has
an opening 14a, FIGS. 2 and 3, in the curved wall thereof
rangement for increasing the bass response of the loud
adapted to receive a loudspeaker 15. The tubular mem
speaker system.
ber 14 has a length substantially greater than its maxi
It is a further object of the invention to provide a rela
mum inner diameter. The speaker opening 14a is of
tively small loudspeaker cabinet which is pleasing in ap
pearance, substantially free'from distortion over an ex
20 substantial length, FlG. 2, approaching the length of the
tended frequency range and is economical to manufacture.
It is a further object of the invention to provide a high
tubular rnemîber 14 and has a width, FIG. 3, substantially
less than the maximum inner diameter of the tubular
member 14. In the preferred .form of the invention the
width of the speaker opening is in the order of about one
adapted for use in pairs in stereophonic sound systems,
25 to three inches wide and has a length in the order of about
five to seven times the width. It has been found that for
In accordance with one aspect of the invention the
fidelity speaker cabinet constructed so that it is suitable
>as the Vbase of a table lamp or the like and is particularly
loudspeaker cabinet includes> an iinner tubular member
having a length substantially greater than its maximum
best results, particularly in regard to tone quality and bass
response, the width of the speaker opening should be su=b-
stantially less than the Width of the speaker enclosure.
inside diameter and an outer tubular member surrounding
The speaker opening is adapted to receive a long, nar
t‘ne inner tubular member and spaced therefrom to pro 30
row speaker 15 of corresponding size such for example
vide a chamber between the adjacent walls of the tubular
as a speaker of the type disclosed in Patent 2,820,527.
members. Mounted in the wall of the inner tubular mem
It is to be understood, however, that the present inven
ber is a loudspeaker having a length substantially greater
tion is not limited to a speaker such as disclosed in the
than the inside diameter of the inner tubular member
and having a width substantially less than its length. The 35 aforesaid patent and that other long, narrow speakers
may be utilized. iFor example, in one cabinet constructed
loudspeaker is mounted in the wall of the inner tubular
in accordance with the present invention the inner tubu
`rnen'rber with the long dimension of the speaker extend
lar member 14 had a length of about twelve inches, an
ing axially of the inner tubular member. The opposite
inside diameter of about 4% inches, an outside diameter
ends of the tubular members are closed to provide an
vacoustic enclosure for the speakerrand the outer tubular 40 of about 5%, inches and was constructed from a heavy
paper tube. The speaker opening in the side wall of the
tube was about two inches Wide and about ten inches
of opposite the speaker. The aperture means in the Wall
long, and the speaker mounted in the opening was of
of the outer tubular member preferably comprises a pl-u
corresponding dimensions. It is to» be understood that
rality of small openings in the area of the wall opposite
the speaker and sound transparent material extends around 45 the tubular member 14 may -be made of other Suitable
' `member is provided with aperture means inthe wall there
the outer surface of the outer tubular member and over
the plurality of small openings.
.
In a further aspect of the invention the loudspeaker,
which is adapted to be mounted in the loud speaker cab
non-foraminous material such for example as fiber, wood
or plastic tubing. The opposite ends of the tubular mem
ber 14 are adapted to be closed by a pair of end mem
bers or discs 17 and 18. The use of a long, narrow
speaker of the aforesaid dimensions tends to produce the
inet, comprises a cone which is supported on a metal 50
frame. The metal frame is provided with a plurality of
apertures at the rear of the cone and a baffle plate is se
combined effects of high notes produced by a two-inch
“tweeter” and low notes produced by a ten-inch “woofer.”
As may be seen in FIG. 2, the speaker 15 is provided
with a metal frame 19 having apertures 19a therein. The
cured to the frame at the opposite side thereof from the
cone, the baille plate having an area sufficient to overlap
the apertures in the frame to provide increase in the bass 55 frame 19 is adapted to support a cone 21. The frame
19 includes a rear section 19h ywhich is adapted to extend
'response of the speaker.
~
around a magnet 22 at the rear of the speaker 15. As
For further objects and advantages thereof and for
may be seen in FiGS. 2 and 3, the speaker 15 is adapted
a more detailed understanding of the invention, reference
to be mounted from the rear as by a pair of screws *24
lis to be had to the following description taken in con 60 which are adapted to extend through openings in the side
Ijunction with the accompanying drawings in which:
wall of the> inner tubular member 14 and into tapped holes
FIG. l is a perspective View of an embodiment of the
invention as applied to the base of a table lamp;
FIG. 2 is an enlarged sectional view of the embodiment
shown in FIG. l;
v
in the rear of frame section 1917. The interior of the
tubular member 414 is separated into two acoustic cham
bers 11a, 11b by ta partition 26 which is disposed sub
stantially midway between the ends 17 and 18 of the
3,082,839
3
cabinet and parallel thereto. The partition ‘26 has a cut
4
around the rear of the speaker 15. The interior of the
tube 14 is lined with sound insulating or `clamping mate
ilected back into the 4outer chamber 32 surrounding the
inner tubular member 14. As may be seen in FIG. 4,
the opposite ends of the grill cloth 42 are adapted to be
secured to the vertical rib 37 by suitable means, such
rial 27, such for example as soft paper, foam rubber,
Fiberglas or other similar sound damping material.
for example as staples 43. The seam in the grill cloth
and the `staples 43 are then adapted to be covered by a
out portion 26a, FIG. 3, which is adapted to extend
It has been found that the range of response ot the
strip of trim material l45, such for example as a strip
speaker 15 may fbe extended by providing a rear baille
of Mylar or other suitable trim strip. The top and bot
plate 28 which is made >from a hard, stiñ and substantial
tom edges of the grill cloth 42 are adapted to be secured
ly homogeneous material such for example as metal `or 10 to the outer surface of the outer tubular member 31 and
hard plastic. It will be noted that the baffle plate 28
the ends thereof adjacent the spacer rings 33 and 34,
extends into 'both chambers or sections 11a, 11b of the
FIG. 2, by suitable means, such for example as staples,
cabinet 11 on either side of the separator 26 and over
adhesive or the like. These edges are then adapted to
laps the openings 19a at the rear of the speaker frame
`be covered by suitable trim strips 46 and 47, FIG. ‘4,
19. While the baffle plate 28 may be mounted on the
such for example as strips of Mylar or other suitable mate
separator 26, it is preferably secured to the rear frame
rial.
section 1‘9b for ease in installation. The baille plate 28
To provide additional weight for the cabinet or base 11,
may be secured to the frame member 19b in any suit
the opposite ends thereof are provided with plate mem
bers 48 and 49. The plate members 48 and 49 are
able manner, such for example as by a suitable adhesive,
such as an epoxy resin. In one installation, with a 20 adapted to cover the corresponding end members 17
speaker approximately two inches wide by ten inches long,
and 18 and the corresponding end rings 33 and 34, as Well
the baille plate 28 was approximately two inches wide,
as the ends of the tubular members I14 and 31. Since
about one-eighth inch thick and had a length between
all of theseportions are obscured from view by the end
about yfour and eight inches. The ybass response of a
members 48 and 49, the latter members are the only ones
loudspeaker cabinet assembly 11 with a bañcle plate 28 of
that need to be provided with a decorative ñnish. The
the foregoing type was substantially improved over the
end members 48 and 49 may be made from various mate~
response without such baille plate and in general the
rials, such for example as walnut, mahogany, birch, oak
length of the plate 28 varies inversely with the weight
or other decorative wood, or they may be made from other
or strength of the speaker magnet '22 for such improved
suitable materials, such as marble, plastic, metal or the
bass response.
30 like.
As may be seen in FIG. 2, when the cabinet 11 is
As may be seen in FIGS. 2 and 3, the inner tubular
employed as a lamp base the end plate 48 and the end
member 14 is provided with an outer tubular member ~3-1
which is spaced therefrom to form an outer chamber
member 17 -have apertures or passages 48a and 17a
32 therebetween. The 4tubular members 14 and 431 are
therein through which a pipe section 50 from the elec
rspaced from each other by a pair of spacer rings 33 and 35 trical fixture 12 is adap-ted to extend. A ñnishing tube
‘34 disposed at the opposite ends of the cabinet 11 and
51 extends over the pipe section 50 and is positioned
a central spacer member 35. The spacer members 33 and
between a support member 52 of the electrical fixture
34 may be in the form of complete rings, whereas the
and the upper surface of end member 48. The lower
middle spacer member 35 has `a portion cut therefrom,
`end of the pipe section 58 is' threaded and is adapted
as may be seen in FIG. 3, so as not to interfere with the 40 to receive a nut member 54 whichV is adapted to coop
front of the speaker 15. To provide longitudinal sup
erate with the iinishing sleeve 51 and clamp the end
port for the outer tubular member 31, there is provided
means including members 17 and 48 therebetween, as
a vertical support in the form of a rib 37 extending length
shown in FIG. 2. The lower end members 18 -and 49
wise of the cabinet 11. While the outer tubular member
likewise are provided with passages :18a and 49a ex- '
"31 may be lformed from tubular stock, it is preferably 45 tending therethrough. The electrical cord 55 for the lamp
`formed from non-foraminous sheet material, such for ex
is adapted to extend through the passages 49a and 18a
ample as heavy paper, fiber or asbestos with the two
in the end members 1S and 49 and through the pipe
end thereof being secured to the vertical support or ri-b 37
section 50 to the electrical fixture 12, while the conduc
by suitable means, such for example as staples. 'I'he up
tor 56 for electrical connection to speaker 15 also ex
per and lower edges of the tubular member 31 are adapted 50 tends through the passages 18a and 49a, as shown in
to be secured to the respective ring members v33 and
FIG. 2. The bottom end member 49 has a shape ade
34 by suitable means, such as staples.
quate to support the complete table lamp 10 in a verti
The outer tubular member 31 is provided with aper
cal position as shown in FIG. 1.
ture means directly opposite the front of the speaker
Referring to FIGS. 5 and `6, there is shown a modi
15. The aperture means in a preferred form of the in
fication 1‘1’ of the invention. `In this' modification, to
vention includes a plurality of small openings or holes
further increase the bass response of the speaker cabi
40. In a cabine-t constructed in accordance with the in
net 11', the inner tubular member 14 is provided with
vention, the outer tube 31 was provided with approxi
a plurality of slots 1412, 14e disposed directly opposite
mately ninety holes opposite the front of the speaker.
the rear of the speaker 15, FIG. 6. As may be seen
The holes were approximately three-eighths inch in diam 60 ‘in FIG. 5, the openings of slots 1411 ‘are `disposed above
eter and were'staggered on three-eighths inch centers. It
the separator member 26 and on opposite sides of the
was found that by providing the outer chamber 32 around
Vertical rib 37. The slots 14C are disposed on opposite
the inner chambers 11a, 11b in the tubular member l14,
`sides of the rib 37 and below the middle separator plate
and with aperture means of the foregoing type, the bass
26. As may be seen in FIG. 6, air may pass' from
response of the cabinet 11 was materially increased.
65 chambers ll’a, lil’b within the inner tubular member
To provide an attractive ‘appearance 'for the cabinet 11,
14 at the rear of the speaker 15, out throughV the open
the outer surface of the outer tubular member 31 is cov
ings 14b and 14e, around through the ring-like outer
ered with suitable sound transparent material such for
`chamber 32 between the adjacent walls of the inner
example as grill cloth 42.- The grill cloth 42 extends
tubular member .14 and `the outer tubular member V31
over the openings 40, thus concealing them from view 70 and out through the openings or portsr40 in the outer
but without Iblocking the sound from the speaker 1S.
tubular member 31 which are directly opposite the front
Since there are wall areas of tubular member 3-1 =be~
of the speaker 15.
v
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.
.
tween the openings 40, some of the sound waves from
From the foregoing description -it will be seen that
the speaker 15 will be directed through the openings
the speaker cabinet 11' is similar to the speaker tabi-V
40 while other portions of thc sound waves will be re
net 11, shown in FIG. l, and that the speaker cabinet
3,082,839
5
6
11’ likewise is adapted to support an electrical fixture
similar to the lamp fixture 12 shown in FIG. 2. The
pipe section 50 may be of Isuitable length to extend
completely through the interior of the cabinet 11' and
into the end members 18 and 49, thus providing con
duit means for protecting the electrical cord 55 contained
4. A loudspeaker cabinet assembly comprising an inner
tubular member of non-foraminous material having a
length substantially greater than its maximum inside diam
eter, an outer tubular member of non-foraminous material
completely surrounding said inner tubular member and
spaced therefrom to provide a chamber between the ad
jacent walls of said tubular members, a speaker, said
therein. The lower sur-face of the bottom or end mem
speaker having a length substantially greater than said
bers 49 may be provided with a pad 58 of suitable ma
inside diameter of said inner tubular member, said
terial such for example as felt or cork, such as is usually
found on the bottom of a lamp base.
10 speaker having’a width substantially less than its length,
said speaker being mounted in the wall of said inner
In the modification shown in FIGS. 5 and 6, the
tubular member with the long dimenison of said speaker
speaker 15 has been mounted to the inner tubular mem
extending axially of said inner tubular member, and
ber 14 by screws 60 extending through the front of the
means sealing the opposite ends of said tubular members,
frame l19 of the speaker. In both embodiments of the
invention the speaker »15 when mounted in the tubular 15 said outer tubular member having aperture means in the
wallthereof opposite said speaker.l
member 14 is sealed around the edges of the frame 19
5. A loudspeaker cabinet assembly according to claim
to the tubular member 14 by suitable material 61. One
4 wherein said aperture means in said wall of said outer
material which has been found to be suitable is plastic
modeling clay. The clay 61, FIG. 2, is adapted to ex
tubular member comprises a plurality of small openings
tend completely aroundA the periphery of the front por 20 in the area of said wall opposite said speaker.
tion `of the frame 19 o-f the loudspeaker 15 and form an
6. A loudspeaker cabinet assembly according to claim
air-tight seal with respect to the outer surface of tubular
4 including sound transparent material extending around
member 14.
the outer surface of said outer tubular member and over
In one speaker cabinet embodying the modification
said aperture means.
shown in FIGS. 5 'and 6, the lengths of the slots 14b 25
7. A loudspeaker cabinet assembly according to claim
and 14e` were approximately two and one-half inches
4 wherein said outer tubular member is formed from rela
each and they had a width of approximately one-half
tively stiff sheet material, a support extending lengthwise
inch. The spacing «between the outer wall of tubular
of said tubular members between said adjacent walls
member 1‘4 and the inner wall of the tubular member
31 Was in the order of about one-half inch and the 30 thereof, and means securing the opposite ends of the said
sheet material to said support to form said sheet material
outs-ide diameter of tubular member 14 was about live
into said outer tubular member.
and-one-quarter inches with the overall length being ap
8. A loudspeaker cabinet assembly according to claim
proximately twelve inches.
4 wherein said inner tubular member is provided with ad
Loudspeaker cabinets built in accordance with the pres
ent invention, while relatively small in size, nevertheless 35 ditional aperture means in the wall thereof at a location
spaced from said speaker t0 provide communication be
have acoustical properties which ordinarily are found
tween the interior »of said inner tubular member and said
only in cabinets of substantially larger size. Loudspeaker
chamber formed between said adjacent walls of said
cabinets constructed in accordance with the present in
tubular members.
vention not `only are economical to construct, but are
also pleasing in appearance. Because of their pleasing
9. A loudspeaker cabinet assembly according to claim
appearance, relatively small size and extended frequency
4 including a baille plate mounted within said inner tubu
range reproduction, such loudspeaker cabinets are par
lar member at a location directly behind said speaker and
ticularly well-suited as bases for lamps or the like and
spaced from the interior surface of said inner tubular
when employed -in pairs provide a particularly desir»
member.
45
able arrangement for stereo sound systems.
10. lA loudspeaker cabinet assembly comprising a tubu
It shall be understood that the invention is not limited
lar member of non-foraminous material having a lengthv
to the preferred embodiments specifically shown and de
substantially greater than its maximum inner diameter, a
scribed, but comprehends other modifications within` the
scope of the appended claims.
pair of end members closing the opposite ends of said
50 tubular member, a speaker opening -in the wall «of said
_ What is claimed is:
tubular member, a speaker ldisposed in said speaker open
l. A loudspeaker cabinet comprising a curved’solid
ing, said speaker having a length approaching the length
wall tubular member having a length substantially greater
than its maximum inner diameter, a pair of end mem
of said tubular member and a width substantially less
than said maximum inner diameter of said tubular mem
bers closing the opposite ends of said tubular member,
a speaker opening disposed in the Wall of said tubular 55 ber, and baille means mounted within said tubular mem-,
ber directly behind said speaker and spaced from the inner
member, said speaker opening having a length substansurfaces of all of the walls of said tubular member, said
tially co-extensive with the length of said tubular mem
baille means comprising a plate having an area less than
ber and a width substantially less than said maximum
the area of said speaker opening and extending trans
inner ldiameter of said tubular member, and an outer
,
solid wall tube surrounding said Íirst~named tubular mem 60 versely of said speaker opening.
ber and spaced therefrom to form an air chamber there- '
between, said outer tube having an opening therein di
rectly opposite the speaker opening in said first-named
ll. A loudspeaker cabinet assembly according to claim
10 wherein the interior of said tubular member' is sepa
rated into a pair of compartments transversely »of the axis
tubular member.
‘ of said tubular member and said baille means extends into
2. A loudspeaker cabinet according to claim 1 wherein 65 both of said compartments.
_
said outer tube is provided with a plurality of small open
l2. A loudspeaker cabinet assembly comprising a tubu
ings directly opposite said speaker opening in said first~
lar member rof non-foraminous material having a length
named tubular member, and a sound transparent material
substantially greater than the width or depth thereof, a
extending around said outer tube and continuing over said
plurality of small openings.
70 pair of end members closing the opposite ends of said
tubular member, a speaker opening in a front wall of said
3.` A loudspeaker cabinet according to claim 1 wherein
tubular member, said speaker opening having a length
said tubular member includes an inside divider member
substantially co-extensive with the length of said tubular
which separates the interior of said tubular member into
member and a width substantially less than said width of
two compartments and each of said compartments is lined
with acoustical insulation material.
75 said `tubular member, a speaker disposed in said speaker
aosasse
7
opening, sealing means extending around the periphery of
said speaker and ‘said speaker opening to seal said speaker
to said front wall of said tubular member, and baille
means mounted within said tubular member directly be
hind said speaker, sai‘d baille means comprising a plate
having an area less than the area of said speaker open
ing and substantially parallel to said opening, said plate
being disposed centrally of said speaker and the length
and width of the plate being less than the respective
length and width of Vthe speaker opening so that all of 10
the edges of the plate are'spaced from the inner surfaces
of the Walls-of said tubular member.
13. A loudspeaker cabinet assembly according to claim
12 wherein said speaker comprises a cone, a metal frame
supporting said cone, said metal frame having apertures
therein at the rear of said icone, and said plate of said.
baille means is secured to said frame at the opposite side
thereof from said cone and having an area suñìcient to
overlap said apertures in said frame.
References Cited in the file of this -patent ‘
UNITED STATES PATENTS
1,461,239
Friedline ____________ __ Jluly 10,
1923
1,778,693
1930
` 2,013,695
Semple _____________ __ fOct. 14,
Nicolson ____________ __ Sept. 10,
2,059,929
Bobb _______________ _.. Nov. 3,
1936
1951
1951
1957
1958
1958
1958
1959
1960
1961
2,559,045
2,806,547
2,820,527
2,839,150
2,858,899
2,888,090
2,926,740
2,973,824
Volf _______________ __ Mar. 13,
Petel ____ __ _________ ___ July 3,
Sewell»_ _____________ __ Sept. 17,
Bobb et al. __________ __ Jan. 21,
Perlman ____________ __ June 17,
Lopez-Henríquez _____ __ Nov. 4,
Wylczik ____________ __ May 26,
Holland ____________ __ Mar.
1,
Pinski ______________ __ Mar. k7,
1935
FOREIGN PATENTS
836,862
1,141,643
Germany ____ __ ______ __ Apr. 17,
France _____________ __ Mar. 18,
1952
1957
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