DE2427043A1 - SPEAKER ENCLOSURE WITH SOUND REFLECTORS - Google Patents

Description

DR. KARL TH. HEGEL DIPL.-ING. KLAUS DICKEL

P A T E N T A N WÄ L T B

VJ 1 20OO Hamburg BO

Great Bergstrasse 223 P.O. Box BO 08 62 Telephone: (040) 39829B Telegram address: Doellnerpatent

Sign: Our sign: the date

H 2329 Di 'Ji, MA «

James R. Westlund
6879 East Cholla Street
Scottsdale, Arizona 85251
VStA

Loudspeaker housing with sound reflectors

The invention relates to a loudspeaker housing and, more particularly, to a novel arrangement of a number of loudspeakers which are aligned with one another and a sound reflector
exhibit.

The invention is based on a loudspeaker housing
which a frame is provided in which there is a spherical container, the 2 loudspeakers in his
inner carries, which are arranged at a certain angle to each other, while each speaker is assigned a sound reflector. Each sound reflector consists of a glass fiber reinforced plastic material and represents a reflection surface, which consists of an inner concave conical

509851/0 100

Postal checking account: Hamburg 2912 20-205 Bank: Dresdner Bank AG. Account no. 3813897

Area that ends in a tip and an outer annular concave area that intersects the inner area in a vertex line. The protruding tip of one each sound reflector partially protrudes into a loudspeaker.

Although the speaker cabinet mentioned above with the sound reflectors can be used in a variety of ways, there are situations in which the use of this housing is suitable appear. For example, there are occasions when a number of speakers are to the side or around are to be placed around a certain surface or space so that the sound emanating from them is reflected and should be distributed relatively evenly across the entire room.

The invention is now based on the object;

1. To create a loudspeaker enclosure that incorporates a sound reflector assembly is equipped, with a number of speakers to be aligned while a common sound reflector should be provided for all loudspeakers;

2. a loudspeaker housing with a sound reflector assembly of the type mentioned, whereby a frame is to be provided in which a number of spherical receptacles in aligned. Way are attached, while in each of the containers also a correspondingly aligned Loudspeaker should be provided}

3. To create an arrangement of the type mentioned, in which a sound reflector made of a glass fiber reinforced plastic is provided, which has a reflection surface, which consists of an inner and an outer area Each of these areas should be essentially oval

50985 1/0 100

Have shape, while the inner area ends in an edge that is close to all speakers.

Various other objects and advantages of the invention will become will become clear from the further detailed description of the embodiment according to the invention.

The object on which the invention is based is achieved by a loudspeaker housing which has a substantially rectangular shape Has frame in which a number of spherical, aligned containers are mounted. Included In each container there is a loudspeaker that is open to the outside in the shape of a funnel. These speakers are all too aligned.

A glass fiber reinforced plastic is attached to the frame Attached sound reflector having a composite concave reflective surface having an inner and has an outer area. Each of these areas has a substantially oval shape, but you can also use it that way can describe that it has straight sides and rounded ends. The inner area has a concave reflection surface, which is defined by running part of an arc around the circumference of the inner area. The two areas or reflection surfaces go on the circumference of the inner area into each other. The circumference of the outer area is provided with an outside circumferential flange, which enables the sound reflector to be fixed in the frame.

The invention is intended below on the basis of an exemplary embodiment will be explained in more detail with reference to the accompanying drawings. It shows in detail:

509851/0100

FIG. 1 is a perspective view of a loudspeaker housing with a sound reflector according to FIG present invention,

FIG. 2 shows a partial section through the fastening arrangement for the spherical container within the frame the dash-dotted section 2 of Figure 1,

FIG. 3 shows a side view partly in section along the section line 3-3 of FIG.

FIG. 4 shows a section through a container and the one located therein Speaker,

Figure 5 is a perspective view of the sound reflector,

FIG. 6 shows a section through the sound reflector along the section line 6-6 in FIG.

In the drawings, the same reference numbers are always used for the same parts been used. In Figure 1, a loudspeaker housing is shown, which is constructed according to the invention and has a frame 10. In the following explanations the frame 10 shall be described in a vertical position as this is a position in which the housing is preferred is used. The frame 10 has a front lower crossbar 11, front side supports 12, and a front one upper cross bar 13 the lower side struts 14 extend rearward from the lower ends of the side supports, while from the upper ends of the supports 12 upper side struts 15 extend rearward. The rear ends of the lower side struts 14 are connected by a lower cross strut, while the rear ends of the upper side struts are connected to one another by a rear upper cross strut 17,

509851/0100

The rear side supports 18 extend between the ends of the rear cross braces 16 and 17.

It is clear that the supports and struts 11, 12 and 13 form a front frame which is essentially in one plane lies. Within this front frame, a number of fastening elements are described in more detail below a number of spherical containers 19, 20 and 21 are held. In this context it should be mentioned that, although 3 spherical containers have been shown in this embodiment, the invention does not apply to this particular one Number is limited. Accordingly, only 2 or also more than 3 such containers can be provided.

The containers 19, 20 and 21 are identical so that the description a single one should suffice in detail to explain the invention. Such a container 20 is shown in section in FIG shown. Glass fiber reinforced plastic is used as the preferred material.

The container 20 has an opening 9 behind which a loudspeaker 22 is arranged. The loudspeaker 22 has a conical part 23 which is attached to the container 20 at the periphery of the opening 9 is fastened by means of holding elements 8. As Figure 1 shows, the container 20 between the side supports 12 with With the help of two holding elements 24 carried. One of these holding elements 24 is shown in detail in FIG. The side supports 12 are made of sheet metal and have a rectangular cross-section. The support 12 is provided with a pair of openings, through which a sleeve 25 extends. Inside the sleeve 25 is a screw bolt 26 with a Head 27, a disk 28 being arranged between the head 27 and the strut 12.

The container has an opening 7 through which a screw bolt 29 reaches through with a head 30, with a disc

509851/0100

Arranged between the head 30 and the inner surface of the container 20 is. A liner 32 covers the exterior of the container 20 around the opening 28 while facing the outside the lining piece 32 is a reinforcing plate 33. The screw bolt 29 extends through the aligned Openings in the liner 32 and the reinforcement plate 33. A spacer sleeve 34 with a threaded hole 35 is located between the support 12 and the container 20 with a disc sandwiched at each end. The screw bolts 26 and 29 are screwed into the spacer sleeve 34, whereby an exact adjustment of the position of the container 20 to the closest support 12 can be set.

The container 19 is connected to the supports 12 and the front lower strut 11 via a similar bracket 24. The container 21 is attached to the supports 12 and the front upper strut 13 via the same members. A sound reflector 3 7 is shown in FIG. It consists of a glass fiber reinforced plastic material and has an inner area 38 and an outer region 39. The inner region 38 has an outer edge, which is defined by the straight sides 6 and the rounded Corners 40 is limited. This structure can generally be described as oval, but this is a consequence the straight side edges 6 does not exactly apply. The inner region 38 has a tapered edge 41 which, like FIG. 3 shows in particular that the loudspeaker 22 is arranged in the vicinity of the conical elements 23.

The inner region 41 has a concave reflective surface 47 which is defined by forming part of an arc of a circle moved in such a way that one end of the sheet follows the circumferential lines and 40, while the other end runs along the edge 41.

The outer area has a concave reflective surface 48, -die is defined by being part of an arc

509851/0100

along the circumferential lines 6 and 40 of the inner region leads, the outer end of the arc of the straight sideline 42 and the rounded ends 43 follows. A flange 44 extends outward from the outer periphery of the area 39 and is provided with openings 45. As can be seen from FIG is, fasteners 46 are provided that these openings 45 and corresponding openings in the rear Reach through supports and struts 16, 17 and 18 and hold the reflector 37 on the frame 10.

The mode of operation will be explained in more detail below. Even though actually the way in which the loudspeaker housing works with the sound reflectors, based on the explanations From the drawings it should be pointed out briefly that the sound waves from the loudspeakers impinge on the reflector 37 and thrown back from there around the containers 19, 20 and 21 into an area on the side on which the housing is located. The relationship of the containers and the reflective surface of areas 38 and to each other-allow an effective and even distribution of the sound waves in this area.

It should be noted that lines 40 and 6, which denote the determine the outer circumference of the inner area 38 and the inner edge of the outer area 39, not at all or hardly in one Sound reflector can be seen, since the areas 38 and 39 merge into one another along the lines 6 and 40.

509851/0100

Claims (1)

427043 - 8 claims Loudspeaker enclosure, characterized by a) a frame (10), b) a number of spherical containers (19) arranged in an aligned manner within the frame (10), 20, 21), c) a loudspeaker (22) within each container (19, 20, 21), which are appropriately aligned with one another are attached behind an opening (9) and d) a sound reflector (37) with a substantially oval Shape, which is fixed within the frame (10) and a composite concave reflection surface (38} 39) and an acute-angled edge (41) which tightly is provided in the vicinity of the loudspeaker (22), while the sound reflector (37) has an inner area (38) which merges into an outer region (39), the inner region being defined by the Part of an arc with one end along the acute-angled edge (41) and with the other end along a straight side line and rounded end lines, which form the outer edge of the inner area (38), while the outer area (49) is defined by the addition of a part of an arc around the circumferential edge of the inner area and the outer area (39) with its edge from the circumference of the inner area C38} away in the direction of the acute-angled © Kant © (41) extends towards =, Loudspeaker housing according to claim I _5, characterized in that the frame (10) consists of a rectangular front frame part (11, 12, 13) and a rear frame part (16, 17, 18), which are connected to one another by cross bars (14, 15) stand, web si the container CiS _; . 2O ₅ 21) in the front frame part CIi ₅ 12 ₃ 13) and around the sound reflector (37) is attached to the rear frame part (16, 17 ₉ 18). 509851/010 0 Blank page