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Publication numberUS3815707 A
Publication typeGrant
Publication dateJun 11, 1974
Filing dateDec 8, 1972
Priority dateDec 8, 1972
Publication numberUS 3815707 A, US 3815707A, US-A-3815707, US3815707 A, US3815707A
InventorsBurhoe W
Original AssigneeEpicure Prod Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Speaker enclosure
US 3815707 A
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.
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Description  (OCR text may contain errors)

United States Patent 11 1 1111 3,815,707

Burhoe June 11, 1974 SPEAKER ENCLOSURE 143,597 9/1951 Great Britain 181/31 1; Inventor: Winslow N- Burhoe yp 927,458 5/1963 Great Bntam l8l/3l B Mass.

[73] Assignee: Epicure Products, lnc., Primary Examine"'st ephen Tomsky Newburyport Mass /S4H0rney,k/l1gent, or Fzrm-James W. Pearce; Roy F.

h 22 Filed: Dec. 8, 1972 c aeper M [2]] Appl. No.: 313,456

52 us. (:1 181/199 [57] ABSTRACT lil 126 112' uaa'iiiiiiiiiiii5195137991.?235 3 n nnnnknn nnnlnnnnn including nlnngnnd nn hollow housmg havmg a sound remforcmg port 1n a nn t:2:5321:32;$211; inztsriistis iizzvsi; 25:51:? UNITED STATES PATENTS element mounted in the upper part thereof and the 1,778,693 lO/l930 Semple, Jr 181/3] B bottom panel housing is upported the bot- 2310448 10/]957 Duck tom panel in spaced relation to a supporting surface 3,371,742 3/1968 NOI'IOI'I 618] 181/3 B and the p in communication ambient air.

FOREIGN PATENTS OR APPLICATIONS 675,879 6/1966 Belgium 181/31 B 4 Claims, 4 Drawing Figures PATENTEDJuu 1 1 m4 SHEET 10F 3 FIG: 1

PA'TE'N'TEDJuu 1 1 m4 SHEET 3 OF 3 FIG--3 SPEAKER ENCLOSURE This invention relates to speaker enclosures or housings. More particularly, this invention relates to a speaker housinghaving bass note reinforcing portions in a lowerportion of the housing.

An object of this invention is to provide a speaker housing in whicha 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. I

In the following detailed description and the drawings, like reference characters indicate like parts.

In FIGS. 14 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 ofeach 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 indicatedat 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 isin 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 l/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.

Having described my invention, what I claim as new and desire to secure by letters patent is:

l. 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.

the supporting surface.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1778693 *Feb 24, 1928Oct 14, 1930Claravox IncLoud-speaker
US2810448 *Dec 27, 1954Oct 22, 1957Dijck Willem J D VanLoud-speaker enclosure
US3371742 *Oct 21, 1965Mar 5, 1968Desmond H. NortonSpeaker enclosure
BE675879A * Title not available
GB143597A * Title not available
GB927458A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4122910 *Mar 4, 1977Oct 31, 1978Raymond WehnerOmniphonic microphone and loudspeaker system
US4332986 *Jan 31, 1980Jun 1, 1982Image Acoustics, Inc.Speaker system employing passive radiator
US7551749Nov 30, 2004Jun 23, 2009Bose CorporationBaffle vibration reducing
US7575095 *Jul 14, 2006Aug 18, 2009Lg Electronics Inc.Speaker
US7983436Apr 14, 2009Jul 19, 2011Bose CorporationBaffle vibration reducing
US8180076Jul 31, 2008May 15, 2012Bose CorporationSystem and method for reducing baffle vibration
US8396240Jul 19, 2011Mar 12, 2013Bose CorporationBaffle vibration reducing
Classifications
U.S. Classification181/199
International ClassificationH04R1/28
Cooperative ClassificationH04R1/2819
European ClassificationH04R1/28N5L
Legal Events
DateCodeEventDescription
Aug 31, 1987AS02Assignment of assignor's interest
Owner name: CONCORD SYSTEMS, I
Owner name: E PICURE PRODUCTS, INC.
Owner name: HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED, A C
Effective date: 19861126
Owner name: PENRIL CORP., CONCORD SYSTEM, INC.
Aug 31, 1987ASAssignment
Owner name: HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED, A C
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:PENRIL CORP., CONCORD SYSTEM, INC.; E PICURE PRODUCTS, INC.;CONCORD SYSTEMS, INC.;EPICURE PRODUCTS, INC.;REEL/FRAME:004761/0314
Effective date: 19861126
May 13, 1986ASAssignment
Owner name: RIGGS NATIONAL BANK OF WASHINGTON D.C., THE, 800 1
Free format text: SECURITY INTEREST;ASSIGNORS:EPICURE PRODUCTS, INC., A MA CORP.;TRIPLETT ELECTRICAL INSTRUMENT CORPORATION, AN OH CORP.;CONCORD SYSTEMS, INC., A DE, CORP.;AND OTHERS;REEL/FRAME:004580/0909
Effective date: 19860502
Owner name: RIGGS NATIONAL BANK OF WASHINGTON D.C., THE,DISTRI