Abstract:
A strap clamp style speaker bracket with a fastener base that can be used for straps of many different sizes. The invention also includes the previously mentioned speaker bracket with a similarly shaped fastener base with a dual pivoting linkage to a second strap clamp style speaker bracket for a unique cylindrical speaker. The clamp base has semi-cylindrical grooves on opposing sides and the strap ends have conformal semi-cylindrical protrusions that fit in the grooves. A bolt through the protrusions and grooves and the clamp block secures the clamp. A cylindrical speaker is illustrated. Another embodiment has legs extending from the clamp block to receive a pivot block which provides a dual articulatible speaker support.

Description:
RELATED APPLICATIONS 
       [0001]    This application claims the benefit of U.S. provisional patent application Ser. No. 62/191,316 filed Jul. 10, 2015 to the same inventors. 
     
    
     FIELD OF ART 
       [0002]    The present invention relates to speaker bracket that connects a loudspeaker (hereinafter “speaker”) to a tubular or cylindrical support. 
       BACKGROUND OF THE INVENTION 
       [0003]    Speakers for outdoor use, including marine and automotive embodiments, can often most conveniently be attached to a tubular or cylindrical support, such as a wake board tow bar, handle bars, roll bars, and the like. Available brackets have particular drawbacks making it inconvenient to use them or results in unreliable attachment of the speaker. 
       SUMMARY OF THE INVENTION 
       [0004]    Briefly described, the invention includes a strap clamp style speaker bracket with a unique fastener base that can be used for straps of many different sizes. The invention also includes the previously mentioned speaker bracket with a similarly shaped fastener base with a dual pivoting linkage to a second strap clamp style speaker bracket for a unique cylindrical speaker. 
         [0005]    An exemplary embodiment provides a speaker bracket including: a clamp base having first and second semi-cylindrical grooves on first and second opposing sides, respectively; first and second arms, adapted to receive a support, extending from first and second opposing ends of a third side of the clamp base, where the third side extends between the first and second opposing sides; a fourth side, opposed to the third side, and extending between the first and second opposing sides; a resilient arcuate clamp strap including opposing first and second clamping ends, further including respective first and second semi-cylindrical protrusions adapted to conform to the first and second semi-cylindrical grooves, respectively; a clamp through-bore in the clamp base extending between the first and second semi-cylindrical grooves; first and second clamp strap end through-bores extending through respective first and second semi-cylindrical protrusions and alignable to the clamp through-bore in a clamping configuration; an at least partially threaded clamp bolt, sized to slidingly fit through the first clamp strap end through-bore, the clamp through-bore, and the second clamp strap end through-bore and to be fastened with a nut; and first and second flat surfaces on the first and second opposing sides and adjacent to and on first and second opposed sides of: first and second semi-cylindrical grooves; and first and second semi-cylindrical protrusions. That speaker bracket, further including: a plurality of threaded fastener holes in the fourth side extending inwardly no further than to the clamp through-bore; an adaptor: fastenable to the clamp base via a plurality of screws into the respective plurality of threaded fastener holes; and having at least one arcuate slot adapted to receive fasteners for fastening the adapter to at least one of a loudspeaker, a loudspeaker housing, and a loudspeaker frame. That first-mentioned speaker bracket, further including: first and second legs extending perpendicularly from opposing ends of the fourth side of the clamp block; the first and second legs having respective first and second rounded ends; first and second pivot bores in respective first and second legs; a pivot block configured to sliding rotate between the first and second legs and having; a semi-cylindrical portion proximate the clamp block; a flat-sided portion extending distally from the semi-cylindrical portion; a pivot block through-bore alignable with the first and second pivot bores; a fastener access bore oriented transverse to the pivot block through-bore; a fastener divot at an opening of the fastener access bore, proximal the clamp block; a narrowed receiver portion of the fastener access bore; an at least partially threaded pivot bolt sized to slidingly fit through the first leg through-bore, the pivot block through-bore, and the second leg through-bore and adapted to be either tightly fastened for clamping or loosely fastened for pivoting; a speaker strap further including: a strap base, a strap extending from the strap base, and a strap end extending from the strap, all including one piece; a strap base fastener bore in the strap base alignable to a strap end fastener bore in the strap end for receiving a first fastener adapted to clamp the strap end to the strap base; a strap end fastener recess in the strap end adapted to receive a head of the first fastener; a smooth strap base bore through the strap base oriented transverse to the strap base fastener bore; a recess in the strap base at an end of the smooth strap base through-bore proximate the strap; an at least partially threaded set screw bore extending into a side of the strap base to the smooth strap base through-bore; a smooth cylinder configured to slidingly rotate within the smooth strap base through-bore, further including: a head portion of wider diameter than the smooth cylinder, configured to slidingly rotate within the recess; a threaded central axial bore within the smooth cylinder; the first fastener adapted to extend through the strap end through-bore and into the strap base fastener bore; a second fastener adapted to extend from the narrowed receiver portion of the fastener access bore to engage the threaded central axial bore within the smooth cylinder; and a set screw, adapted to be engaged in the set screw bore to either prevent the smooth cylinder from rotating or allow the smooth cylinder to rotate. 
         [0006]    The disclosure of the invention provides a speaker bracket including: a clamp base having first and second semi-cylindrical grooves on first and second opposing sides, respectively; first and second arms, adapted to receive a support, extending from first and second opposing ends of a third side of the clamp base, where the third side extends between the first and second opposing sides; a fourth side, opposed to the third side, and extending between the first and second opposing sides; a resilient arcuate clamp strap including opposing first and second clamping ends, further including respective first and second semi-cylindrical protrusions adapted to conform to the first and second semi-cylindrical grooves, respectively; a clamp through-bore in the clamp base extending between the first and second semi-cylindrical grooves; first and second clamp strap end through-bores extending through respective first and second semi-cylindrical protrusions and alignable to the clamp through-bore in a clamping configuration; and an at least partially threaded clamp bolt, sized to slidingly fit through the first clamp strap end through-bore, the clamp through-bore, and the second clamp strap end through-bore and to be fastened with a nut; and first and second flat surfaces on the first and second opposing sides and adjacent to and on first and second opposed sides of: first and second semi-cylindrical grooves; first and second semi-cylindrical protrusions. The speaker bracket, including: a plurality of threaded fastener holes in the fourth side extending inwardly no further than to the clamp through-bore; an adaptor: fastenable to the clamp base via a plurality of screws into the respective plurality of threaded fastener holes; and having at least one arcuate slot adapted to receive fasteners for fastening the adapter to at least one of a loudspeaker, a loudspeaker housing, and a loudspeaker frame. The speaker bracket, including: first and second legs extending perpendicularly from opposing ends of the fourth side of the clamp block; the first and second legs having respective first and second rounded ends; first and second pivot bores in respective first and second legs; a pivot block configured to sliding rotate between the first and second legs and having; a semi-cylindrical portion proximate the clamp block; a flat-sided portion extending distally from the semi-cylindrical portion; a pivot block through-bore alignable with the first and second pivot bores; a fastener access bore oriented transverse to the pivot block through-bore; a fastener divot at an opening of the fastener access bore, proximal the clamp block; a narrowed receiver portion of the fastener access bore; an at least partially threaded pivot bolt sized to slidingly fit through the first leg through-bore, the pivot block through-bore, and the second leg through-bore and adapted to be one of tightly fastened for clamping and loosely fastened for pivoting; a speaker strap further including: a strap base, a strap extending from the strap base, and a strap end extending from the strap, all including one piece; a strap base fastener bore in the strap base alignable to a strap end fastener bore in the strap end for receiving a first fastener adapted to clamp the strap end to the strap base; a strap end fastener recess in the strap end adapted to receive a head of the first fastener; a smooth strap base bore through the strap base oriented transverse to the strap base fastener bore; a recess in the strap base at an end of the smooth strap base through-bore proximate the strap; an at least partially threaded set screw bore extending into a side of the strap base to the smooth strap base through-bore; a smooth cylinder configured to slidingly rotate within the smooth strap base through-bore, further including: a head portion of wider diameter than the smooth cylinder, configured to slidingly rotate within the recess; a threaded central axial bore within the smooth cylinder; the first fastener adapted to extend through the strap end through-bore and into the strap base fastener bore; a second fastener adapted to extend from the narrowed receiver portion of the fastener access bore to engage the threaded central axial bore within the smooth cylinder; and a set screw, adapted to be engaged in the set screw bore to one of prevent the smooth cylinder from rotating and allow the smooth cylinder to rotate. 
     
    
     
       DESCRIPTION OF THE FIGURES OF THE DRAWINGS 
         [0007]    The present invention will hereinafter be described in conjunction with the following drawing figures, wherein like numerals denote like elements, and 
           [0008]      FIG. 1  is a perspective view illustrating an exemplary embodiment of the speaker bracket, according to a preferred embodiment of the present invention; 
           [0009]      FIG. 2  is a rear perspective view illustrating the exemplary embodiment of the speaker bracket of  FIG. 1  fully installed, according to a preferred embodiment of the present invention; 
           [0010]      FIG. 3  is a side perspective view illustrating the exemplary embodiment of the speaker bracket of  FIG. 1  installed on a speaker of  FIG. 2 , according to a preferred embodiment of the present invention; 
           [0011]      FIG. 4  is a rear perspective view illustrating an exemplary embodiment of the speaker bracket of  FIG. 1  installed on a speaker of  FIG. 2 , according to a preferred embodiment of the present invention; 
           [0012]      FIG. 5  is a side perspective partially exploded view illustrating the exemplary embodiment of the speaker bracket of  FIG. 1  in a first installation configuration, according to a preferred embodiment of the present invention; 
           [0013]      FIG. 6  is a side perspective partially exploded view illustrating the exemplary embodiment of the speaker bracket of  FIG. 1  in a second installation configuration, according to a preferred embodiment of the present invention; 
           [0014]      FIG. 7  is a front perspective exploded view illustrating the exemplary embodiment of the speaker bracket of  FIG. 1 , according to a preferred embodiment of the present invention; 
           [0015]      FIG. 8  is a side elevation view illustrating the exemplary embodiment of the speaker bracket of  FIG. 1  and defining a cross-section AA, according to a preferred embodiment of the present invention; 
           [0016]      FIG. 9  is a front elevation view through cross section AA illustrating the exemplary embodiment of the speaker bracket of  FIG. 1 , according to a preferred embodiment of the present invention; 
           [0017]      FIG. 10  is a front perspective view illustrating the exemplary embodiment of the speaker bracket of  FIG. 1  with straps of various sizes, according to a preferred embodiment of the present invention; 
           [0018]      FIG. 11  is a front elevation view illustrating a second exemplary embodiment of a dual speaker bracket, according to a preferred embodiment of the present invention; 
           [0019]      FIG. 12  is a front cross-sectional elevation view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11 , according to a preferred embodiment of the present invention; 
           [0020]      FIG. 13  is a front perspective view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a first type of handle bars, according to a preferred embodiment of the present invention; 
           [0021]      FIG. 14  is a front perspective view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a second type of handle bars, according to a preferred embodiment of the present invention; 
           [0022]      FIG. 15  is a front-side perspective view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a cylindrical speaker as shown in  FIG. 14 , according to a preferred embodiment of the present invention; 
           [0023]      FIG. 16  is a side elevation view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a cylindrical speaker as shown in  FIG. 14  and defining cross section BB, according to a preferred embodiment of the present invention; 
           [0024]      FIG. 17  is a cross sectional view through section BB illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a cylindrical speaker as shown in  FIG. 14 , according to a preferred embodiment of the present invention; 
           [0025]      FIG. 18  is an end elevation view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a cylindrical speaker as shown in  FIG. 14 , according to a preferred embodiment of the present invention; 
           [0026]      FIG. 19  is an end elevation view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a cylindrical speaker as shown in  FIG. 13 , according to a preferred embodiment of the present invention; 
           [0027]      FIG. 20  is a bottom plan view illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a cylindrical speaker as shown in  FIG. 13  and defining cross section CC, according to a preferred embodiment of the present invention; and 
           [0028]      FIG. 21  is a cross sectional view through section CC illustrating the second exemplary embodiment of the dual speaker bracket of  FIG. 11  installed on a cylindrical speaker as shown in  FIG. 13 , according to a preferred embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0029]      FIG. 1  is a perspective view illustrating an exemplary embodiment of the speaker bracket  100 , according to a preferred embodiment of the present invention. Clamp base  104  features semi-cylindrical grooves  116  on opposing sides, and arms  118  for receiving a pipe or rod onto which the speaker bracket  100  may be attached. Resilient strap  102  has opposed clamping ends  122  featuring respective semi-cylindrical protrusions  114  that fit conformally into respective semi-cylindrical grooves  116  when installed. The internal surface  110  of resilient strap  102  engages the pipe or similar support in operation. Outer surface  120  is generally exposed to view and the environment. The clamp base  104  has a through-bore  704  (see  FIG. 7 ) to which opposing through-bores  702  (see  FIG. 7 ) in each opposed clamping end  122  align to receive clamp bolt  106  which is tightened using nut  108  to secure the speaker bracket  100  to a pipe, handle bar, or similar support. Adjacent to either side of the semi-cylinder grooves  116  and protrusions  114 , flat surfaces of the clamping ends  122  abut flat surfaces of the clamp base  104  when the strap  102  is installed. 
         [0030]    The clamp base  104  also has threaded fastener holes  112  to assist in fastening the speaker bracket  100  to a speaker  204  (see  FIG. 2 ) optionally using adapter  302  (see  FIG. 3 ). Speaker bracket  100  is preferably made of metal. In various other embodiments, other materials may be used. 
         [0031]      FIG. 2  is a rear perspective view illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1  fully installed, according to a preferred embodiment of the present invention. Speaker bracket  100  couples speaker  204  to support  202 . Support  202  may be stage rigging, a tow bar on a wake boat, or any circular cylindrical extent of any object. In other embodiments, the support  202  may be of various cross-sectional shapes, with strap  102  conformally shaped to receive such support. While speaker  204  is a wake boat speaker  202 , the invention is not limited to any one kind of speaker  204 . 
         [0032]      FIG. 3  is a side perspective view illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1  installed on the speaker  204  of  FIG. 2 , according to a preferred embodiment of the present invention. Adapter  302  is fastened to the bottom of clamp base  104  as will be described in further detail in regard to  FIG. 7 . Adaptor  302  has arcuate slots  308  (one visible in this view) through which fasteners  304  enter into threaded fastener receivers inside speaker  204  (not shown). In other embodiments, fasteners  304  may be positioned differently in slot  308 , depending on the arrangement of the fastener receivers in other speakers  204 . Fastening may be to the loudspeaker housing, the loudspeaker frame, and/or the loudspeaker. Speaker  204  has a water-resistant grommet  310  through which audio signal wires  312  extend. 
         [0033]      FIG. 4  is a rear perspective view illustrating an exemplary embodiment of the speaker bracket  100  of  FIG. 1  installed on the speaker  204  of  FIG. 2 , according to a preferred embodiment of the present invention. The angle of the speaker bracket  100  to a centerline of the speaker  204  may be adjusted by rotating adapter  302  to the desired angle and securing adapter  302  in position using fasteners  304 , as shown. Speaker bracket  100  is rigidly connected to adapter  302 . 
         [0034]      FIG. 5  is a side perspective partially exploded view illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1  in a first installation configuration, according to a preferred embodiment of the present invention. Fasteners  304  may be inserted through slots  308  at any place along the length of slots  308 . 
         [0035]      FIG. 6  is a side perspective partially exploded view illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1  in a second installation configuration, according to a preferred embodiment of the present invention. In this embodiment, four fasteners  304  are used to secure adapter  302  to a speaker. Clamp bolt  106  is shown with an Allen wrench socket in the head of the fastener  106 . The number of the fasteners  304  may vary according to the application (weight of the speaker, dynamic loads in the environment, etc.). 
         [0036]      FIG. 7  is a front perspective exploded view illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1 , according to a preferred embodiment of the present invention. Adapter fasteners  708  extend through adapter fastener openings  706  into threaded fastener bores  112  to rigidly connect clamp base  104  to adapter  302 . Clamp bolt  106  extends through aligned bores  702  and  704  and into nut  108 . Tightening nut  108  supplies compression to strap ends  122  against the sides of clamp block  104 . In various other embodiments, adapter  302  may be modified as to shape, responsive to speaker design. Resilient strap  102  has first and second flat surfaces  710 ,  714  and  712 ,  716  on said first and second opposing sides of and adjacent to first and second semi-cylindrical protrusions  114 . Clamp block  104  has first and second flat surfaces  718 ,  722  and  720 ,  724  on said first and second opposing sides of and adjacent to first and second semi-cylindrical grooves  116 . The flat surfaces  710 ,  714  and  712 ,  716  on the strap ends  122  of the resilient strap  102  are conformal to the flat surfaces  718 ,  722  and  720 ,  724 , respectively. In a particular embodiment, some variation from flatness may be used. 
         [0037]      FIG. 8  is a side elevation view illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1  and defining a cross-section AA, according to a preferred embodiment of the present invention. The width of strap  102 , strap ends  122 , and clamp block  104  are preferably equal. In other embodiments, strap  102  may not have a uniform width. 
         [0038]      FIG. 9  is a front elevation view through cross section AA illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1 , according to a preferred embodiment of the present invention. The relationship between adapter fasteners  708  and clamp bolt  106  is such that the adapter fasteners  708  do not extend into clamp bolt  106 . The heads of adapter fasteners  708  are counter sunk into the bottom of adapter  302  to avoid damaging the speaker, when installed. Note that strap ends  122  do not make contact with adapter  302 . In another embodiment, strap ends  122  may abut adapter  302 . 
         [0039]      FIG. 10  is a front perspective view illustrating the exemplary embodiment of the speaker bracket  100  of  FIG. 1  with straps of various sizes, according to a preferred embodiment of the present invention. A novel feature of the present invention is that the clamp base  104 , strap ends  122 , clamp bolt  106 , and adapter  302  can be used with any of straps  102 ,  1012 ,  1022 ,  1032 ,  1042 , and  1052 , though of course, not at the same time. Yet even larger straps may be used with larger clamp bases  104 , where the larger clamp base  104  shape is the same shape as illustrated for clamp base  104 . 
         [0040]      FIG. 11  is a front elevation view illustrating a second exemplary embodiment of a dual speaker bracket  1100 , according to a preferred embodiment of the present invention. Dual speaker bracket  1100  includes a speaker strap  1150 . Speaker bracket  1100  begins similarly to speaker bracket  100 , with strap  102 , strap ends  122 , and clamp base  1104 , which is like clamp base  104 , but with legs  1120  that end in rounded portions  1122 , as shown. Legs  1120  have pivot bores  1210  (see  FIG. 12 ) aligned with a pivot block bore  1212  (see  FIG. 12 ) through pivot block  1124  through which pivot bolt  1132  extends to engage pivot nut  1134 . Pivot bolt  1132  can be loosened to allow pivoting and tightened to lock the joint into position. Pivot block  1124  has a semi-cylindrical portion  1128 , a screw divot  1126  in the semi-cylindrical portion  1128 , and flat-sided portion  1130  extending from the semi-cylindrical portion  1128 . As will be described more fully below, pivot block  1124  rotates relative to strap base  1136  about what would be a vertical axis in the plane of  FIG. 11 , such as the axis of screw  1206 . Pivot head  1146  in recess  1148  rotates with pivot block  1124 . Pivot block  1124  also rotates about pivot bolt  1132 , creating a doubly articulated joint. Strap base  1136  extends into speaker strap  1138  and to strap end  1140 . Strap end  1140  has a strap end bore  1218  (see  FIG. 12 ) that aligns to a threaded bore  1220  (see  FIG. 12 ) in strap base  1136  to receive second clamping bolt  1144  with head  1142 . 
         [0041]      FIG. 12  is a front cross-sectional elevation view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11 , according to a preferred embodiment of the present invention. Second clamping bolt  1144  clamps strap end  1140  to strap base  1136 . Head  1146  is the head of a smooth cylinder  1208  into which a screw  1206  (or similarly effective fastener) captive in pivot block  1124 , is fixedly threaded. Rotation of the smooth cylinder  1208  may be prevented by advancing set screw  1204  in bore  1202  in strap base  1136 , as shown. Smooth cylinder  1208  is inserted into a complimentary vertical cavity  1216 , or strap base through-bore  1216 , in strap base  1136  during assembly, and captive screw  1206  fastens pivot block  1124  to smooth cylinder  1208  for concurrent rotational adjustment. Screw  1206  is made captive in that it is first inserted into pivot block through a bore  1214  leading from screw divot  1126 , is tightened in smooth cylinder  1208 , and then pivot bolt  1132  is inserted through legs  1120  and pivot block  1124 , thereby capturing screw  1206 . 
         [0042]      FIG. 13  is a front perspective view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a first type of handle bars  1302 , according to a preferred embodiment of the present invention. Speaker brackets  1100  are shown in a doubly articulated configuration with straps  1138  holding cylindrical speaker  1304  securely in place. Cylindrical speaker  1304  has a housing  1306 , a grill  1308 , and a control section  1310 . Handlebars  1302  are illustrative of any situation where two generally proximate supports are used to support a speaker  1304 . 
         [0043]      FIG. 14  is a front perspective view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a second type of handle bars  1402 , according to a preferred embodiment of the present invention. The speaker brackets  1100  are shown in a non-articulated configuration. Handlebars  1402  are illustrative of any situation where a speaker  1304  is to be supported on a single, substantially straight support. 
         [0044]      FIG. 15  is a front-side perspective view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a cylindrical speaker  1304  as shown in  FIG. 14 , according to a preferred embodiment of the present invention. Control section  1310  has a first end cap  1512  supporting three fastener features  1506  (one of three labeled), AUX input and AUX output  1508  (one of two labeled) are shown with water resistant covers, a power input coupling  1510 , and six Blue Tooth control selector buttons  1504  (one of six labeled). In other embodiments, the placement and number of buttons may vary. Second end cap  1502  closes the opposing end of cylindrical speaker  1304 . 
         [0045]      FIG. 16  is a side elevation view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a cylindrical speaker  1304  as shown in  FIG. 14  and defining cross section BB, according to a preferred embodiment of the present invention. Speaker straps  1138  engage the speaker housing  1306  and the grill  1308 , but not the first end cap  1512  nor the second end cap  1502 . Excluding the speaker  1304 , the cross section BB is shown in  FIG. 12 . 
         [0046]      FIG. 17  is a cross sectional view through section BB illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a cylindrical speaker  1304  as shown in  FIG. 14 , according to a preferred embodiment of the present invention. First acoustic driver (hereinafter “driver”)  1704  is a woofer mounted on support panel  1702  as is frame  1714 . Second driver  1706 , a tweeter, is supported by frame  1714 . Fastener receivers  1712  (one of three labeled) are reinforced, as with panels  1710  and  1702 , as shown, and align to fastener features  1506  during assembly. In a preferred embodiment there are two woofers  1704  (one behind the other in this view) and four tweeters  1706  (three behind one, in this view). 
         [0047]      FIG. 18  is an end elevation view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a cylindrical speaker  1304  as shown in  FIG. 14 , according to a preferred embodiment of the present invention. Logo panel  1802  may be molded into first end cap  1512  or may be made separately and affixed by adhesion or similarly effective means. 
         [0048]      FIG. 19  is an end elevation view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a cylindrical speaker  1304  as shown in FIG.  13 , according to a preferred embodiment of the present invention. Speaker brackets  1100  are shown doubly articulated in that there is rotation about pivot bolt  1132  and pivot block  1124 . Clamp base  1104  is pivoted relative to clamp block  1124  about pivot bolt  1132  and pivot block  1124  is articulated by rotation with respect to strap base  1136 . 
         [0049]      FIG. 20  is a bottom plan view illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a cylindrical speaker  1304  as shown in  FIG. 13  and defining cross section CC, according to a preferred embodiment of the present invention. A portion of pivot bolt  1132  can be seen crossing the bore that the screw divot  1126  initiates. 
         [0050]      FIG. 21  is a cross sectional view through section CC illustrating the second exemplary embodiment of the dual speaker bracket  1100  of  FIG. 11  installed on a cylindrical speaker  1304  as shown in  FIG. 13 , according to a preferred embodiment of the present invention. Inside cylindrical speaker  1304 , a reinforcing panel  2102  supports pushbuttons, such as  1508 . Recess  2104  receives with head  1142  of second clamping bolt  1144  and may receive a lock washer as well, to compensate for the lack of a nut.