U.S. patent number 3,815,707 [Application Number 05/313,456] was granted by the patent office on 1974-06-11 for speaker enclosure.
This patent grant is currently assigned to Epicure Products, Inc.. Invention is credited to Winslow N. Burhoe.
United States Patent |
3,815,707 |
Burhoe |
June 11, 1974 |
SPEAKER ENCLOSURE
Abstract
A speaker enclosure including an elongated upright hollow
housing having a sound reinforcing port in a bottom panel thereof
with the interior of the housing being substantially unobstructed
between a speaker element mounted in the upper part thereof and the
bottom panel. The housing is supported with the bottom panel in
spaced relation to a supporting surface and with the port in
communication with ambient air.
Inventors: |
Burhoe; Winslow N.
(Newburyport, MA) |
Assignee: |
Epicure Products, Inc.
(Newburyport, MA)
|
Family
ID: |
23215762 |
Appl.
No.: |
05/313,456 |
Filed: |
December 8, 1972 |
Current U.S.
Class: |
181/199 |
Current CPC
Class: |
H04R
1/2819 (20130101) |
Current International
Class: |
H04R
1/28 (20060101); G10k 013/00 (); H04r 001/28 () |
Field of
Search: |
;181/31B |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
675,879 |
|
Jun 1966 |
|
BE |
|
143,597 |
|
Sep 1951 |
|
GB |
|
927,458 |
|
May 1963 |
|
GB |
|
Primary Examiner: Tomsky; Stephen J.
Attorney, Agent or Firm: Pearce; James W. Schaeperklaus; Roy
F.
Claims
Having described my invention, what I claim as new and desire to
secure by letters patent is:
1. A speaker enclosure which comprises an elongated upright hollow
housing having side panels and a top panel attached to the side
panels and closing the top of the housing, four side panels each
having an opening adjacent said top panel, means for supporting a
pair of speaker elements in an upper portion of the housing, each
in registry with an opening in a respective side panel of a first
pair of side panels, a second pair of side panels, a pair of cover
boards each substantially thinner than a respective side panel and
closing the opening in a respective side panel of said second pair,
the housing including a bottom panel extending transversely of the
housing and closing a lower end of the housing, there being a sound
reinforcing port in the bottom panel with the interior of the
housing being substantially unobstructed between the speaker
element and the bottom panel, and means for supporting the housing
with the bottom panel in spaced relation to a supporting surface
and with the port in communication with ambient air.
2. A speaker enclosure as in claim 1 wherein the housing supporting
means supports the housing with the bottom panel parallel to the
supporting surface.
3. A speaker enclosure as in claim 2 wherein the housing supporting
means supports the housing with the bottom panel spaced between 1/8
inch and 2 inches above the supporting surface.
4. A speaker enclosure as in claim 2 wherein the housing supporting
means supports the housing with the bottom panel spaced
approximately one inch above the supporting surface.
Description
This invention relates to speaker enclosures or housings. More
particularly, this invention relates to a speaker housing having
bass note reinforcing portions in a lower portion of the
housing.
An object of this invention is to provide a speaker housing in
which a lower plate of the housing cooperates with an underlying
floor to reinforce bass notes produced by a speaker carried in the
housing.
Briefly, this invention provides a speaker housing which includes a
hollow chamber in an upper portion of which a speaker cone is
mounted. The lower end of the chamber is closed by a bottom plate
which is parallel to a supporting surface and supported in spaced
relation above the supporting surface. An opening in the bottom
plate provides a bass reinforcing port. The portion of the bottom
plate surrounding the opening cooperates with the supporting
surface to provide a bass reinforcing air column. The chamber is
unobstructed between the cone and the bottom plate, and the air
column inside the chamber also helps reinforce the sound output of
the speaker housing.
The above and other objects and features of the invention will be
apparent to those skilled in the art to which this invention
pertains from the following detailed description and the drawings
in which:
FIG. 1 is a perspective view of a speaker housing constructed in
accordance with an embodiment of this invention, a fabric facing
thereof being partly broken away;
FIG. 2 is a view in side elevation of the speaker housing shown in
FIG. 1, the fabric facing being partly broken away;
FIG. 3 is a bottom plan view of the speaker housing illustrated in
FIGS. 1 and 2; and
FIG. 4 is a view in transverse section taken on the line 4--4 in
FIG. 3.
In the following detailed description and the drawings, like
reference characters indicate like parts.
In FIGS. 1-4 inclusive is shown a speaker housing 11 constructed in
accordance with an embodiment of this invention. The housing 11
(FIG. 1) includes side panels 12, 13, 14 (FIG. 3) and 16, which can
be similar in construction. Each side panel includes downwardly
extending leg portions, the leg portions of the side panel 12 being
indicated at 112 and 212. Leg portions of the side panel 13 are
indicated at 113 and 213 in FIG. 4. Leg portions of the side panel
14 are indicated at 114 and 214. Leg portions of the side panel 16
are indicated at 116 and 216.
In the upper portion of each side panel is provided an outwardly
facing opening, the opening in the side panel 12 (FIG. 1) being
indicated at 312 in FIG. 1. Th opening in the side panel 13 is
indicated at 313, the opening in the side panel 14 (FIG. 4) is
indicated at 314, and the opening in the side panel 16 (FIG. 2) is
indicated at 316. Upright or side edges of the side panels are
mitered and attached together to form a box-like enclosure. A top
panel 18 is attached to the upper ends of the side panels to close
the top of the housing 11. A bottom panel 19 is mounted between the
side panels 12, 13, 14 and 16 above the leg portions thereof. Edges
of the bottom panel are received in slots (FIG. 4) in the side
panels, the slot in the side panel 14 being indicated at 414. The
bottom panel is provided with a central port opening or bore 22
with the bottom panel 19 being supported in spaced relation to a
supporting surface or floor 221 (FIGS. 2 and 4) on which the
speaker housing 11 stands.
Annular speaker mounting boards 23 and 24 (FIG. 4) are attached to
the inner faces of the side panels 12 and 14, overlying the
openings 312 and 314, respectively. Speaker cones or elements 26
and 27 are mounted on the speaker mounting boards 23 and 24,
respectively. Opening cover boards 28 and 29 are attached to the
inner faces of the side panels 13 and 16 to cover and close the
openings 313 and 316 thereof. The interior of the housing 11 is
unobstructed between the speaker cones 26 and 27 and the bottom
panel 19, as indicated most clearly in FIG. 4. An appropriate sound
transmitting decorative fabric outer facing 31 (FIGS. 1 and 2) can
be attached to outer faces of the side panels.
When the speaker cones are energized, the speaker housing provides
a plurality of sound reinforcing air columns. A first sound
reinforcing air column is provided inside the housing between the
bottom panel 19 and the top panel 18. A second sound reinforcing
air column is provided inside the opening 22 in the bottom panel
19. A third sound reinforcing air colum is provided between the
bottom panel 19 and the floor 221. These air columns can be tuned
by varying the dimensions of the speaker housing, the diameter or
size of the opening 22 in the bottom panel 19, the area of the
bottom panel 19 surrounding the opening 22, the thickness of the
bottom panel 19 and the height of the legs or height of the bottom
panel 19 above the floor 221. All of these air columns are in
communication with ambient air and provide response surrounding the
speaker housing because the port opening 22 is in communication
with air surrounding the housing through spaces between the leg
portions of the side panels.
The speaker housing dimensions can vary over wide ranges depending
on the type of frequencies which it is desired to reinforce and the
space demands of a room or the like in which the speaker housing is
mounted. A typical speaker housing of my invention, which is shown
in the drawings, can be approximately thirty-two inches tall with
the bottom panel 19 being 1/2 inch thick with a circular opening 22
of a diameter of 5 inches being provided centrally thereof and the
width of each of the side panels being 8 1/2 inches, and the height
of the lower face of the bottom panel 19 above the floor 221 being
1 inch. This speaker housing provides an excellent reinforcement of
audible base notes.
The speaker housing shown in the drawings and described above
includes two cones mounted on opposite side panels of the housing.
However, if desired, additional speaker cones can be mounted on the
other side panels at the openings thereof. The mountings of the
additional speaker cones can be similar to the mounting of the
speaker cones shown. On the other hand, a single speaker cone can
be employed instead of the two speaker cones shown.
The side panels and the top and bottom panels can be attached
together adhesively. The speaker cones can be attached to the
speaker boards 23 and 24 adhesively or by use of appropriate
fasteners (not shown), and the speaker mounting boards can be
adhesively attached to the inner faces of the side panels.
Although the height of the bottom panel 19 above the floor 221 in
the illustrated embodiment of the invention is approximately 1
inch, the spacing of the bottom panel above the floor 221 can be
varied by varying the length of the leg portions of the side
panels. Good results in the audible range have been secured with
speaker housings in which the height of the bottom panel above the
floor is as great as 2 inches or as little as 1/8 inch and for
heights within this range.
The speaker housing construction illustrated in the drawings and
described above is subject to structural modification without
departing from the spirit and scope of the appended claims.
* * * * *