Патент USA US3082849код для вставки
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 ' 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 ' . . 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 '