Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1915954 A
Publication typeGrant
Publication dateJun 27, 1933
Filing dateAug 25, 1932
Priority dateAug 25, 1932
Publication numberUS 1915954 A, US 1915954A, US-A-1915954, US1915954 A, US1915954A
InventorsScofield Theodore J
Original AssigneeSparkswithington Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Loud speaker system
US 1915954 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

June 27, 1933. T. J. SCOPE-:LD


llllllhullllli l ll1lllliliL.

Illllxlllll illlllllllllll INVENTOR 7 dore J caf/e/a A ORNEY www..


Patented June 27, 1933 N 'narran STATES PATENT OFFICE '.rrinonOii-:a Scorrano, or JACKSON, iaionionn, Assiaivon fromnn'srnnxs i Wirierrneron oo.; A CORPORATION or Omo LOUD SPEAKER. sY'srnivi Y VApplication filed August `25, 1932; i' `SlcralNo. 630,368.

VThis invention relates to loud speakersand spot as is usual in loud speaker production.Vv

@ther obJects Oi the invention will appear in the following description referencebeing i" had to the drawing inwhicli:

Fig. 1 is a sectionalplan view of. the loud speakers arranged in a radio set7 `the section being takenon line A. A of Figf2.

Fig 2 is a front view ofthe! loud speakerl part of a radio set shown in Fig. 1.

Fig. 3 isa partial endviewoi the loud speaker part of the setI shown in Figs. 1 and 2. It has been found desirable in sound producing systems to employ a` plurality of loud speakersT as commonly called. Athas been the custom to arrange these loud speakers so that they either throw the sound waves in one direction or concentrate them as near as possible at one point. Neither of these' speakers, three being shown by way of example, so their axes are divergent outwards, as clearly shown in Fig. 1.

In the drawings the cabinet or housing has side pieces or panels 1 and 2 and a central front panel 3. `In Fig. 1 I have shown the iront panel set inwards but it may, if ldesired, extend from one corner post l to the other post 5. The two auxiliary front panels 6 and extend from the corner posts 4land 5 and are joined to strips 8 and 9 secured to the front panel 3, although panel 3, could reach across the full width oi" cabinet as above suggested. Partitions or baiiles 10, 11 and 12 are positioned as shown in Fig 1 so that the baffle 10 is parallel and adjacent the front panel 3 and the batfies 11 and 12 are angularly positioned in relation to the panels 1, 6 v'and' 2, 7, respectively. rlhe baille 10 rests against the yedges of baiilesll and 12 and is preferably glued or otherwise secured thereto at anangle.V The'baiiiesll andj 12 are Y similarlypostioned or secured in respect to thepanels 1 and :2. Toppieces l1and'12' togetherwith thebottom 13, furnish additional battles to 4prevent the vibrating air column from "following a shortlcircuiting path from front torearinside the cabinet.` `The chassis sheli l13 and bottomz13 likewise act astop and bottom battles for the loud speaker 15. may be omitted to producethe desired tonal effect-and with this in-viewl have omitted in some cases the bottom member 13 under thespeakers. Y l

The speaker may be of any desired type. The` cones or horns 14, loan-d 16, as the lcase may b,e,zarefitted againstthe balilesf10,11 and 12fand suchbaiiles have openingstherein,fcorresponding to the shape of the cones;

The panels 1, 6, 3, 7 and 2 have openings-V therein in any desired form but by Wayof example I have shown the front panel 3 as having an ornamental design formed by a One or more of these additional baliles plurality of slots 17 and the remaining fourV openings 18, 19, 2O and 21 With parallellvertical sides and circulartops and bottoms. All these openings may be covered with suitable gauze fabric orother material, as indicated at 22 in Figs. 2 and 3. Y

rIhe binding Aposts 23 of the driving elements 24 (shown conventionally in the drawings) permit the connection of such elements in series or parallel relation, as desired. These elements would be connected to vacuum tube amplifiers in a well understood way, but as these form no part of my inven` tion they are not shown in the drawing.

When the set is functioning the loud speaker 15 directs the air impulses or vibrations roughly perpendicularly to the front panel 3 though of course these vibrations spread or tan outwardly to considerable extent as they travel Jfrom the front panel. The loud speaker 14 directs its impulses angularly toward .the corner of the cabinet and out through the openings 18 and 19 while the loud speaker 16 sends its impulses out angularly l through theopenings 20 and 21.

With the arrangement described the plus rality of speakers produce a pleasing tonal effect as the sound comes from one one center of origin and appears to issue'from all parts of the room.

Having described my invention, what IV claim is: f

l. In sound production, a cabinet having front and sidepanels with openings therein,

a plurality o'fvbaille boards having their adv jacent edges meeting and positioned to'form an angle between adjacentboards, saidbaiiie boards having openings therethrough and a sound producing device positioned adjacent Aeach of said openings.

2. In sound production, a cabinet having front and side panels with openings therein, a baffle board'eXtending parallel to the front panel and having an openingv therethrough,

, additional baiie boards extending angularly across the fronty cornersof the cabinet eachV having an edge abutting against an edge-of vthefirst'bafle board'an'd the other .of its edges abutting against one of said sidepan-v i els, saidsecond mentioned balile boards hav ing openings therethrough and a sound pro- Y ducing device positionedk adjacent the'opening in each ofsaid baiiie'boards.y

In sound production, a cabinet having front andside panels with openings therein, a baffle board extending parallel to the front panel and-'having an opening therethrough, 'secondbaiiie board o extending angularly across the corner of the cabinet with one of its edges abutting"aga-inst.` an edge of the irst lpaneland theother of Vits edgesv abutting against one of said end panels, the second mentioned baffle board having an opening therethrough and a sound producing device positionedadjacent the opening in eachof said baffle boards. Y

4. In sound production, a cabinet having front and side panels with openings therein,

va sound producing device positioned in said cabinet .to direct its sound perpendicularly` through the front panel and an additional sound device positioned to direct its sounds diagonally throughl each of the'front corners of the cabinet..y

6. In sound productiona cabinet having front and side panels with openings vadjacent the front corners, thefront panell also'having a central opening, a sound producing device positioned in said cabinet todirect its sound perpendicular-ly through said central open-- ing and additional soundl producing devices positioned in said cabinet to direct theirV sounds diagonally through the other openings'adjacent'the corners.

In testimony whereof, I have'signed my naine to this specification this twentieth day of August, 1932. l j Y rHEoDoRE J. socialism'.

las j

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2450139 *Sep 20, 1943Sep 28, 1948Baron HartsoughTone cabinet for electric organs
US2602860 *Nov 18, 1947Jul 8, 1952Stewart Doubt LeonLoud-speaker structure
US2610694 *Apr 8, 1946Sep 16, 1952Hartford Nat Bank & Trust CoStereophonic reproduction apparatus
US2632055 *Apr 18, 1949Mar 17, 1953Parker John ELoud speaker system
US2710662 *Dec 23, 1948Jun 14, 1955Armour Res FoundSound projection system
US2877862 *Mar 1, 1956Mar 17, 1959Karsted Jessie WSound producer
US3104729 *Nov 2, 1959Sep 24, 1963 Stereophonic sound reproducing loudspeaker system
US8181736Aug 14, 2009May 22, 2012Harman International Industries, IncorporatedPhase plug and acoustic lens for direct radiating loudspeaker
US8418802May 3, 2012Apr 16, 2013Harman International Industries, IncorporatedPhase plug and acoustic lens for direct radiating loudspeaker
US8672088Mar 28, 2013Mar 18, 2014Harman International Industries, Inc.Phase plug and acoustic lens for direct radiating loudspeaker
DE973570C *Oct 2, 1948Mar 31, 1960Siemens AgEinrichtung zur plastischen Wiedergabe elektroakustischer Darbietungen
U.S. Classification181/199, 381/186
International ClassificationH04R1/26, H04R1/22
Cooperative ClassificationH04R1/26
European ClassificationH04R1/26