Abstract:
An enhancer assembly for connection to a compound bow by means of a bracket that mounts the enhancer assembly to the compound bow at a position proximate to the cables in a position off-set from the bowstring to retain the cables from being in the path of the bowstring. The enhancer assembly comprises an enhancer composed of a non-metal material and at least one cable guide connected to one end of the enhancer for slidably receiving the cables, whereby the enhancer reduces the amount of shock and noise produced upon release of the drawn bowstring to propel an arrow and increase the speed of the arrow.

Description:
BACKGROUND OF THE INVENTION 
     1. Description of the Invention 
     This invention relates to compound bow enhancers and more particularly to enhancers that reduce noise and vibrations while increasing arrow speed. 
     2. Description of the Background Art 
     In a traditional compound bow, a bowstring is connected by a pair of cables over respective eccentric pulleys or cams connected to the bow tips and then cross over to the opposite limbs where the ends are attached directly or indirectly to the bow limb. In more modern compound bows, only one cam is utilized. 
     One drawback of the compound bow is the noise generated upon releasing the bowstring to propel the arrow. When the bowstring reaches the end of its arrow-propelling path, the cables are propelled forwardly causing considerable hand shock. The portion of the cables which cross in the middle portion of the bow rub against each other to produce noise and waste kinetic energy. If used while hunting, the noise may alert game birds and animals. 
     In my prior patent, U.S. Pat. No. 4,834,061, the disclosure of which is hereby incorporated by reference herein, I disclosed a bilateral cable vibraguard (see FIG. 2 of U.S. Pat. No. 4,834,061) that reduced noise of the bowstring. My prior cable vibraguard reduced vibrations; however, because it was composed of spring steel, it quickly fatigued after about 200 draws. Due to such unavoidable premature fatiguing, my prior bilateral cable vibraguard was only prototyped and never commercialized. 
     It is an object of this invention to a provide compound bow enhancer that functions as a vibraguard to dampen the noise generated by the crossing cables which would otherwise rub against one another upon release of the drawn bowstring. 
     Another object of this invention is to provide a compound bow enhancer for reducing hand shock. 
     Another object of this invention is to provide a compound bow enhancer to increase the speed-of-flight of the arrow as it is propelled forward. 
     The foregoing has outlined some of the more pertinent objects of the present invention. These objects should be construed to be merely illustrative of some of the more pertinent features and applications of the invention. Many other beneficial results can be obtained by applying the disclosed invention is a different manner or modifying the invention within the scope of the disclosure. Accordingly, other objects and a fuller understanding of the invention may be had by referring to the summary of the invention and the detailed description describing the preferred embodiment in addition to the scope of the invention defined by the claims taken in conjunction with the accompanying drawings. 
     SUMMARY OF THE INVENTION 
     The invention is defined by the appended claims with a specific embodiment shown in the attached drawings. For purposes of summarizing the invention, the invention comprises a enhancer assembly for use with a conventional compound bow. 
     Conventional compound bows have a pulley or cam mounted at the ends of the bow limbs. A bowstring is connected to a pair of cables. The cables are threaded around respective cams mounted at the ends of the bow limbs, then cross over each other at the midportion of the bow and are then connected to the respective end of the other bow limbs. 
     In its preferred embodiment, the enhancer assembly of the invention comprises a non-metal enhancer having an elongated configuration with cable guides on its ends for receiving the cables. The enhancer is coupled at its midportion to one end of an elongated bracket. The other end of the elongated bracket is connected to the handle portion of the bow. The bracket serves to adjustably position the enhancer at a rest position proximate to the crossing cables such that the cable guides separate the cables from one another to prevent them from rubbing against one another. 
     During drawing of the bowstring, the bow limbs arc rearwardly. The cables, being stretched between the ends of the bow limbs, likewise move rearwardly to bend the enhancer rearwardly in the direction of the arcing bow limbs. Upon release of the bowstring, the bow limbs propel the bowstring (and arrow) forwardly. Simultaneously, the enhancer propels the crossing cables forwardly. As the cables are entrained within the cable guides, they remain separated at all times. Further, as the enhancer is composed of a non-metal, the back-and-forth movement of the enhancer after release, is significantly dampened. Hand shock and noise are therefore substantially minimized. Furthermore, an increase in arrow speed is achieved due to the increased dynamic efficiency. 
     Furthermore, it has been found that a significant increase in arrow speed can be obtained by “pre-loading” the enhancer. More particularly, by shortening the bracket to reposition the enhancer forwardly of its at normal at-rest position to a “pre-loaded” position, the enhancer is bent by the crossing cables into a slight arc rearwardly. Upon drawing of the bow, the enhancer arcs more rearwardly, and upon release, a meaningful increase in arrow speed can be achieved with only a negligible increase in draw length and draw weight. 
     As noted, the enhancer is preferably composed of a non-metal material such as a synthetic material preferably in the form of a fiberglass. The enhancer composed of a synthetic material such as fiberglass results in an enhancer that is resilient with essentially permanent memory. The permanent resiliency results in a enhancer that (1) is long-lasting for multitudes of flexes without fatigue, (2) is more bendable to greater arcs without fatigue or loss of memory, (3) minimizes hand-shock as is bent to an arcuate configuration and released to return to its at-rest position, (4) has a greater damping coefficient than metal resulting in faster damping without ringing, and (5) absorbs sound better than metal. In contrast, my prior vabraguard composed of metal as disclosed in my prior art patent, fatigued too quickly and lost memory due to the repetitive back-and-forth bending of the metal, produced significant hand-shock, and tended to “ring” thereby compromising the purpose of being a enhancer. 
     It is believed that many composites of synthetic materials may be employed such as those containing graphite or other strengthening materials. It is also believed that many orientations of the fibrous materials embedded in the composite may be employed. Currently, it is believed that the best implementation of the enhancer is achieved using compression molding of fiberglass in which the glass fibers run the full elongated length of the enhancer. 
     The foregoing has outlined rather broadly the more pertinent and important features of the present invention in order that the detailed description of the invention that follows may be better understood so that the present contribution to the art can be more fully appreciated. Additional features of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and the specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings in which: 
     FIG. 1 is a side view illustrating the enhancer assembly of the invention attached to a compound bow in an at-rest position; 
     FIG. 2 is a side view illustrating the enhancer assembly of the invention attached to a compound bow in a pre-loaded position; 
     FIG. 3 is a side view illustrating the enhancer assembly of the invention attached to a compound bow in a drawn position; 
     FIG. 4 is a partial front view of FIG. 1; 
     A FIG. 5 is a partial rear view of FIG. 1; 
     FIG. 6 is an enlarged side view of the enhancer assembly of FIG. 1 absent the compound bow; and 
     FIG. 7 is an enlarged rear view of the enhancer assembly of FIG. 1 showing the manner in which the enhancer is positioned to the outside of the axis of the cables and connected thereto by means of cable guides; 
     FIG. 8 is a perspective view of the first embodiment of the cable guides; 
     FIG. 9 is a perspective view of the second embodiment of the cable guides; 
     FIG. 10 is a perspective view of the third embodiment of the cable guides; 
     FIG. 10A is a perspective view of the fourth embodiment of the cable guides; 
     FIG. 11 is a side view of the enhancer assembly of the invention employing the first and second embodiments of the cable guides; 
     FIG. 12 is a side view of the enhancer assembly of the invention employing the first and third embodiments of the cable guides; 
     FIG. 13 is a perspective view of the enhancer assembly of the invention further including cushion plates for preventing undue fatigue on the fiberglass material; 
     FIG. 14 is an exploded view of FIG. 13; 
     FIG. 15 is an exploded view of FIG. 13 further including a leaf spring positioned forwardly of the enhancer; 
     FIG. 16 is a side view of the assembled enhancer of FIG. 15 wherein the enhancer includes an inward longitudinal twist; 
     FIG. 17 is a side view of a unilateral version of the enhancer assembly of the invention; 
     FIG. 18 is a perspective view of another embodiment of the enhancer assembly of the invention wherein the cable guides are linked to the enhancer; 
     FIG. 19 is a perspective view of still another embodiment of the enhancer assembly of the invention wherein the cable guides are made integral to the enhancer; 
     FIG. 20 is a perspective view of still another embodiment of the enhancer assembly of the invention wherein the cable guides are pivotally connected to the enhancer by means of sockets that fit over the ends of the enhancer; and 
     FIG. 21 is an opposite side view, partially exploded, of still another embodiment of the enhancer that includes a thickened middle portion to minimize fatigue and includes a re-curve configuration. 
     Similar reference characters refer to similar parts throughout the several views of the drawings. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     FIG. 1 is a side view illustrating the first embodiment of the enhancer  10  assembly of the invention. The enhancer assembly  10  of the invention is used with a conventional compound bow  12  having a bow handle  14  and a pair of outwardly extending bow limbs  16 . A pair of eccentric pulleys such as cams  18 A and  18 B are rotatably journalled to the respective ends  16 A and  16 B of the bow limbs  16 . A bowstring  20  is provided with cables  20 A and  20 B at the ends thereof. The bowstring  20  extends between the cams  18  with the cables  20 A and  20 B respectively wound around the cams  18 A and  18 B. The cables  20 A and  20 B are then crossed-over at cross-over point X and their ends respectively connected to the other ends  16 B and  16 A of the bow limbs  16 . It is noted that the enhancer assembly  10  of the invention is operable with many makes and models of compound bows  12 . For example, the enhancer assembly  10  of the invention is operable with compound bows  12  employing only one cam. 
     The enhancer assembly  10  of the invention is mounted to the compound bow  12  by an elongated bracket  30  with the cables  20  being entrained through respective cable guides  11 A and  11 B connected to the ends of the enhancer assembly  10 . The bracket  30  serves two purposes. Firstly, the bracket includes an off-set  30 A portion for off-setting the enhancer assembly  10  to the outside of the line of path of the bowstring  20  (see FIGS. 4 and 5) so that the cables  20  are forced to the outside by being entrained in the cable guides  11 A &amp;  11 B and to not otherwise obstruct the flight of the arrow (not shown). Secondly, the bracket  30  serves to position the enhancer assembly  10  rearwardly in alignment with or forwardly of the crossing cables  20 . 
     More specifically, the bracket  30  is preferably adjustably connected through a hole in an attachment plate  32 , such as by means of one or more set-screws  32 S. For retrofitting, the attachment plate  32  may include a series of holes  32  formed therein for receiving screws or bolts for securing the attachment plate  32  to the bow handle  14 . Alternatively, the attachment plate  32  may be integrally formed within the bow handle  12  during the manufacture thereof. For reasons explained below in greater detail, the adjustability of the bracket  30  permits its length L to be adjusted to position the enhancer assembly  10  relative to the crossing cables  29 A and  20 B. Thus, as shown in FIG. 1, the length L rest  of the elongated bracket  30  is in an “at-rest” position when the enhancer assembly  10  of the invention is aligned with the crossing cables  20 A and  20 B and, as shown in FIG. 2, in a “pre-loaded” position when the length L load  of the bracket  30  is shortened to position the enhancer assembly  10  forwardly of the at-rest position (L load &lt;L rest ). 
     As shown in FIG. 3, upon drawing of the bowstring  20 , the bow limbs  16  are arced rearwardly. Simultaneously, the cables  20  are forced rearwardly and force the enhancer assembly  10  to arc rearwardly. Upon release, the bow limbs  16  propel the bowstring  20  (and arrow) forwardly with great speed to propel the arrow into flight. Simultaneously, the enhancer assembly  10  propels the cables  20  forward. As explained below in greater detail, the enhancer assembly  10  serves to reduce hand shock and noise and serves to increase the speed of the propelled arrow. Further, as explaned below, if the enhancer assemble is preloaded as shown in FIG. 2, more significant increased air speed can be achieved. 
     Turning now to FIGS. 6,  7 ,  11 ,  12  &amp;  13 , the enhancer assembly  10  comprises an enhancer  40  having, in one embodiment, an elongated generally planar, elongated configuration with the cable guides  11 A &amp;  11 B pivotally connected to the ends thereof by means of pivot pins  42  that extend through respective holes  44  in each of the cable guides  11 A &amp;  11 B and a corresponding aligned hole  46  formed in the bulbous ends of the enhancer  40 . As shown, the axis of the pivot pin  42  is generally parallel to the plane of the enhancer  40 . The generally planar configuration of the enhancer  40  is preferred in this embodiment due to its ability to flex rearwardly upon drawing of the bow as shown in FIG. 3 while minimizing twisting due to the offset positioning of the enhancer assembly  10  from the path of the bowstring  20 . 
     As noted above, the cable guides  11 A &amp;  11 B function to entrain the cables  20 A &amp;  20 B (1) to separate them and prevent them from rubbing at the point of cross-over X, (2) to pull them outwardly away from the path of the bowstring  20  to an off-set position as shown in FIGS. 4 and 5 and (3) to allow the cables  20  to bend the enhancer  40  rearwardly upon drawing of the bowstring  20  whereupon upon release of the bowstring  20 , the cables  20  are forcibly urged forwardly by the enhancer  40  and then dampened to minimize shock and noise. The cable guides  11 A &amp;  11 B may thus comprise many configurations without departing from the spirit and scope of the invention. 
     More particularly, in one embodiment shown in FIG. 8, one of the cable guides  11 A &amp;  11 B may comprise a generally rectangular configuration with cable slots  50 A and  50 B being formed therein from the side closest to the enhancer  40 , with cable slot  50 B being formed deeper than cable slot  50 A and with the slots  50  being positioned on opposing sides of the pivot pin hole  44 . In another embodiment as shown in FIG. 9, cable guide  11 A &amp;  11 B is similarly configured but with the cable slot  50 A being formed deeper than cable slot  50 B. In the embodiment of the cable guide  11 A &amp;  11 B shown in FIG. 10, both cable slots  50 A and  50 B are formed to one side of the pivot pin hole  44  with slot  50 A likewise being deeper than slot  50 B. Finally, similar to the embodiment of FIG. 9, the embodiment of the cable guide  11 A &amp;  11 B shown in FIG. 10A both cable slots  50 A and  50 B are formed to one side of the pivot pin hole  44  but slot  50 A is formed shallower than slot  50 B. 
     The various embodiments of cable guides  11 A &amp;  11 B are paired so as to separate the cables  20  and prevent them from rubbing. For example, as shown in FIGS. 6 and 7, the embodiment of the cable guide of FIG. 8 may be used as both the upper and lower cable guides  11 A and  11 B to separate the cables  20 A and  20 B but allow them to cross-over at cross-over point X below the enhancer  40  (see FIGS.  1 - 5 ). Also for example, as shown in FIG. 11, the embodiment of the cable guide of FIG. 8 may be used as the upper cable guide  11 A and paired with that of FIG. 9 to be used as the lower cable guide  11 B to separate the cables  20 A and  20 B but allow them to cross-over at cross-over point X therebetween. Still further for example, as shown in FIG. 12, the embodiment of the cable guide of FIG. 8 may be used as the upper cable guide  11 A and paired with that of FIG. 10 to be used as the lower cable guide  11 B to separate the cables  20 A and  20 B but allow them to cross-over at cross-over point X therebetween. As shown in FIG. 13, the embodiment of the cable guides  11 A &amp;  11 B of FIG. 9 may be used as both the upper and lower cable guides  11 A and  11 B to separate the cables  20 A and  20 B but allow them to cross-over at cross-over point X below the enhancer  40 . As another example, as shown in FIG. 21, the embodiment of the cable guide of FIG. 10 may be used as the upper cable guide  11 A and paired with that of FIG. 10A to be used as the lower cable guide  11 B to separate the cables  20 A and  20 B but allow them to cross-over at cross-over point X therebetween. 
     In each of the foregoing, the complementary depths and positions of the slots  50  relative to the respective pivot pin  42  compensates for the tendacy of the enhancer  40  to twist due to the offset positioning of the enhancer assembly  10  from the path of the bowstring  20 . Then enhancer  40  is therefore arced rearwardly more planarly while minimizing torquing. 
     FIG. 14 is a partial exploded rear view of the enhancer assembly  10  showing greater detail the components thereof. More particularly, the enhancer  40  is attached to the proximal end of the bracket  30  by means of a hole  50  formed in the mid-portion  52  thereof to receive a mounting screw or bolt  54  to firmly attach the enhancer  40  to the proximal end of bracket  30 . A square retainer  56  into which is fitted a square washer  58  may be provided on opposing sides of the enhancer  40  to maintain orientation without movement relative to the bracket  30 . Further, a pair of slightly arcuate cushion members  60 , preferably composed hard rubber of a high durometer of approximately 80, may be positioned on opposing sides of the enhancer  40  to further reduce shock and noise. Alternatively, it is noted that the cushion member  60  may each be composed of a metal with a rubber pad positioned between its mating surface with the enhancer  40 . Finally, as shown in FIG. 15, a leaf spring  62  may be positioned between the enhancer  40  and the bracket  30 . The leaf spring  62  functions to further minimize stress imposed in the enhancer  40  from riding against the cushion members  60  and increase forward dampening of the enhancer  40 . In this regard, as best shown in FIG. 16, it is noted that the leaf spring  62  preferably includes re-curved ends  62 R that facilitate riding along the front of the enhancer  40  during forward flexing. As shown throughout FIGS. 1-16, the retainer  56 , washer  58 , cushions  60  and leaf spring  62  are held securely into position by the threaded fastener  54  that extends through aligned holes  56 H,  58 H,  60 H and  62 H therein. 
     As alluded to earlier, due to the offset positioning of the enhancer assembly  10 , an outward twisting force is imparted to the enhancer  40  itself during drawing of the bowstring  20 . In order to compensate for such twisting force, the enhancer  40  may be manufactured with a built-in twist as shown in FIG. 16 in lieu of being formed more planar as shown in the previous embodiments of the enhancer  40 . Preferably, the degree of twist is on the order of 2 to 10 degrees in the inward direction toward the bowstring  20 . More preferably, the degree of twist is on the order of 3 to 4 degrees. In this manner, as the enhancer  40  is twisted outwardly during drawing of the bowstring  20  to the full draw length, the enhancer  40  will tend to “straighten up” to a planar configuration with minimal or no twisting when drawn. 
     The enhancer assembly  10  as described above comprises a generally bilateral configuration extending bilaterally from the bracket  30 . As shown in FIG. 17, the enhancer assembly  10  may alternatively (but less preferably) extend unilaterally from the bracket  30  with corresponding unilateral cushion members  60 , either upwardly (as shown) or downwardly, and be fitted with only one cable guide  11 A &amp;  11 B. 
     As shown in FIG. 18, the enhancer assembly  10  may be fitted with linked cable guides  11 A &amp;  11 B. In this embodiment, the cable guides  11 A &amp;  11 B comprises a generally rectangular configuration with slots  50  of substantially equal depth for receiving the respective cables  20 . A pair of opposing links  70  are positioned on opposing sides of the cable guides  11 A &amp;  11 B and are pivotally connected thereto and to the bulbous end of the enhancer  40  by respective pivot pins  70 P. In this embodiment, the cable guides  11 A &amp;  11 B are advantageously in the same plane as the enhancer  40 . 
     The various embodiments of cable guides  11 A &amp;  11 B described above are preferably manufactured from a lightweight material that is self-lubricating. That the cable guides  11 A &amp;  11 B are lightweight is important to minimize inertia. It is noted that likewise, the pivot pins  42  and  70 P are also preferably composed of a lightweight material (e.g., aluminum or composite plastic) to minimize inertia. That the cable guides  11 A &amp;  11 B are composed of a self-lubricating material is important to minimize friction between the cables  20  sliding within the slots  50 . 
     FIG. 19 illustrates still anther embodiment of the enhancer assembly  10  in which the cable guides  11 A &amp;  11 B are integrally formed with the enhancer  40  itself Similar to those if FIG. 18, the cable guides  11 A &amp;  11 B are positioned in the same plane as the enhancer  40  but do not pivot. Instead, in this embodiment of FIG. 19, the slots  50  are provided with countersunk recesses  5 OR extending inwardly from the upper and lower surfaces thereof to meet at a center portion  50 C. The countersunk recesses  5 OR meeting at the center portion  50 C obviate the need for the cable guides  11 A &amp;  11 B to be pivotally connected to the enhancer  40  as in the previous embodiments as the cables  20  themselves are allowed sufficient room to pivot within the recesses  50 R without binding. 
     FIG. 20 is a perspective view of still another embodiment of the enhancer assembly  10  of the invention wherein the various embodiments of the cable guides  11 A &amp;  11 B are connected to the enhancer  40  by means of sockets  11 S that are fitted over the ends of the enhancer  40  and rigidly secured thereto such as by crimping, an adhesive, or the like. The sockets  118  may be integral with the cable guides  11 A &amp;  11 B similar to FIG. 19 or may be linked or pivoted to the cable guides  11 A &amp;  11 B similar to other Figs. 
     Finally, FIG. 21 is a side view of the most preferred embodiment of the enhancer assembly  10  of the invention wherein the enhancer  40  includes a thickened middle portion  40 C to minimize fatigue and includes a re-curve configuration  40 R at the ends of the enhancer  40 . In this most preferred embodiment, the square retainer  56  is rigidly connected to the proximal end of the bracket  30  by a flat-headed fastener  41  (screw, rivet, etc), by welding, by an adhesive, or the like. The thickened middle portion  40 C is provided with a transverse pivot pin hole  70 . The opposing sides of the square retainer  56  is likewise provided with transverse holes  72  in alignment therewith. A pivot pin  74  is positioned through holes  70  and  72  to pivotally connect the enhancer  40  to the proximal end of the bracket  30 . 
     Preferably a rubber cushion  78  is seated within the retainer  56  between the retainer  56  and the enhancer  40 . Also preferably the pivot pin hole  72  is oblong in configuration. In this manner, the rubber cushion  78  is under some compression when assembled and held into position by the pivot pin  74  yet further cushioning is possible due to the oblong nature of the hole  72 , thereby further reducing hand shock and vibrations. Finally, it is noted that the pivot pin  74  may be sleeved with a self-lubricating bushing and/or a cushioned bushing to reduce friction and to further reduce hand shock, respectively. 
     In the most-preferred embodiment of FIG. 21, the thickened middle portion serves to provide a thickness in which to form the hole  70  while reducing bending of the enhancer  40  along the middle portion thereof. The flexibility of the enhancer  40  to be drawn rearwardly during drawing of the bowstring  20 , is still maintained, however, due to the re-curve configuration  40 R of the enhancer  40 . 
     In all embodiments, the enhancer assembly  10  of the invention achieves significant reductions in hand shock and noise than was found in my prior vibraguard as taught in my prior patent (U.S. Pat. No. 4,834,061). In contrast to my prior vibraguard that was made from spring steel, this is attributed in large part to the enhancer  40  being composed of a non-metal material such as a synthetic plastic, most preferably, compression-molded fiberglass as described above. It is believed that the use of enhancer assembly  10  of the invention in a conventional compound bow significantly increases the bow&#39;s dynamic efficiency. 
     Furthermore, it has been discovered that optimal shock and noise reduction is achieved without increasing the draw weight or draw length or reducing arrow speed, by configuring the enhancer  40  so that it may sufficiently flex rearwardly during drawing of the bowstring  20  without “pulling” on the cables  20  and forcing them from otherwise extending straight across from the ends of the bow limbs  16  (see FIG. 3 wherein the cables  20  still extend straight across between the ends of the bow limbs  16  without any forward pulling by the enhancer  40 ). Conversely, if the flex of the enhancer  40  is too strong to cause the cables  20  to be pulled forwardly during drawing of the bowstring  20 , an increase in the draw weight and draw length occurs. 
     Furthermore, as noted above in connection with FIG. 2, the enhancer assembly  10  may be positioned in a “pre-loaded” position with the length L load  of the bracket  30  being shortened to position the enhancer assembly  10  forwardly of the at-rest position (L load &lt;L rest ). Pre-loading of the enhancer assembly  10  increases the speed of flight of the arrow and while further minimizing shock and noise. However, as set forth in the following chart, as the enhancer assembly  10  is more and more pre-loaded, the draw weight and draw length increases from being imperceptible to being measurable: 
     
       
         
               
               
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                   
               
               
                   
                 Pre-loading 
                   
                   
                   
               
               
                   
                 Amount 
                   
                   
                   
               
               
                   
                 (L rest  minus 
                   
                 Draw 
                   
               
               
                 Product 
                 L load ) 
                 Arrow Speed 
                 Weight 
                 Draw Length 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 conventional 
                 N/A 
                 261 fps 
                 60 
                 lbs. 
                 29 
                 inches 
               
               
                 cable guard 
               
               
                 invention 
                 0* 
                 286 fps 
                 59.5 
                 lbs. 
                 29 
                 inches 
               
               
                 invention 
                 ¼ inch 
                 287 fps 
                 60 
                 lbs. 
                 29 ⅛ 
                 inches 
               
               
                 invention 
                 ⅜ inch 
                 288 fps 
                 61 
                 lbs. 
                 29 ⅛ 
                 inches 
               
               
                   
               
               
                 *embodiment of FIG. 21, at rest, no pre-loading (with lightweight aluminum pivot pin)  
               
             
          
         
       
     
     Thus, it should be appreciated from the forgoing table that a conventional compound bow may be set at less draw length and weight and the enhancer assembly  10  of the invention installed thereon in a pre-loaded position, to achieve significantly less shock and noise and a meaningful increase in arrow speed. 
     The present disclosure includes that contained in the appended claims as well as that of the foregoing description. Although this invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention. 
     Now that the invention has been described,