fig1 shows an element 100 , which in this case is a tapered body sinker of heavy metal . the element could be a bobber , a weight holder ( a / k / a drop shot rig ) or an element unrelated to the fishing arts , such as a connector or flag on a line or filament . note that line or filament is meant in its most generic sense , such as from a micro - thin optical fiber to a large diameter steel cable . this invention is not limited to the type of line . the term filament is only used for convenience and is not a limitation . through the core of the element is a passage 102 with openings 104 and 106 at its ends . the passage is shown as linear / straight , but can be serpentine , spiral or other path , though straight is preferred . openings 104 / 106 can be circular , but the preferred structure is a non - round shape as it aids in its other function as a stop , as will be explained later . therefore , other shapes are shown in fig2 - 5 , such as round with ears ( points of engagement ) 108 , star shaped 106 c , hex or octagon 106 a and cross / star / phillips 106 b . many other shapes are acceptable and are incorporated herewith . such shapes have some element which would prevent the rotation of a stop element ( discussed below ). thus the importance of the shape selection is its ability to mate with the stop element and prevent counter - rotation . fig6 illustrates another feature of the invention . in addition to the passage 102 in the body 100 , a second cut into the body can be made from the outside . this access cut or slit 110 , permits the filament ( any kind of line ) to reach the passage 102 without the need to thread the filament through the passage end to end . this would require either cutting the line or having a free end to the line , something which is often impossible . instead , the access cut , whether straight ( not shown ) or other pattern , provides a way to slide the line into the passage without having a free end . thus the cut must be at least large enough to accommodate the filament ( directly or under compression ) and small enough that a portion of the stop element 114 can be inserted therein , preferably under compression or distention by stretching ( elongating ). the use of a serpentine cut 110 makes it more difficult for the line to slide free on its own without manual assistance . a notched cut ( having a jog offset portion ) 112 in fig1 is an alternative . it has a sharp right angle which accomplishes the same effect as the serpentine cut , but is even more reliable in preventing separation of the element ; however , it is much more difficult to insert the line therein . to make the invention have the slideable feature , a stop ( or stopper ) element 114 is inserted into the opening 102 and it is friction created by twisting of the stop element which locks the filament to the element 100 , such as a sinker or bobber , in the fishing arts . in this embodiment , the stop element is shown as a sleeve that separates the line 140 from the inner surface of the passageway 102 . stop element 114 , has an elongated body / twistable sleeve 116 , preferably made of an elastomeric material . the body is preferably sized to extend to and preferably beyond the length of passage 102 so that it extends beyond the opening 104 and 106 . at the end of the body are preferably anti - rotation elements ( ears ) 118 on either or both ends . these anti - rotation elements / features are shown with ears 120 which correspond to notches / recesses 108 in or associated with ( i . e . in some way mechanically linked with ) element 100 in fig2 . it can be appreciated , that when the ears and notches mate , the body is secured against rotation on both ends . it is possible to create this securing feature with other shapes as shown both in fig2 - 5 and 8 - 10 ( oval , rectangular , hex or non circular cross section , etc ), so long as an interlocking engagement is achieved to prevent relative rotation . entirely different anti - rotation elements or means are contemplated within the scope of this term . it is only required that the counter rotation be prevented when the element is twisted to the desired degree . fig1 illustrates the concept of how the stop 114 engages the filament 130 ( shown in broken lines as it passes through the element 100 and passage 102 ). the stop is first inserted into the element 100 in one of two ways . either by forcing it through one opening 104 / 106 to the other , or by forcing it through the cut 110 ( not shown in fig1 ). it may be preferable to stretch the stop lengthwise to make it thinner for purposes of getting into the cut 110 since it will generally be preferred to make it wider than the cut , so that it cannot fall out . with the stop in place , and the filament threaded therethrough , it is now possible to lock the element ( such as a bobber , sinker or some other element ) to the line / filament . in the preferred embodiment , the user twists either ( bulbous ) end 122 of the stop 114 . the shape of the end 122 should be large enough so as not to be drawn into the passage 104 . it may help to pull end 122 upwardly away from the element 100 for ease of twisting . this will cause the body 116 to engage the filament 130 and prevent it from slipping . this twisting is schematically suggested by line 140 in fig1 ( 140 is not a serpentine cut ). it is possible that the stop could become untwisted ; thereby allowing the filament to be released , but the addition of engagement elements will prevent this . the preferred engagement element are the anti - rotation elements 118 which engage recesses 108 ( fig2 ) but as shown in fig2 - 5 and 8 - 10 , there are a multiplicity of ways to prevent counter rotation of the twisted body 116 . fundamentally , it is necessary to engage both ends of the stop element with the main element 100 to prevent counter rotation . shaping the elements 118 to mate with like recesses 108 ( of any shape ) will accomplish this . note that it would be possible to fix one end 122 and twist the other . fixing could be accomplished by gluing or swedging ( or like means for fixing ) the end against counter - rotation . it would be possible to eliminate one of the bulbus ends 122 by gluing or otherwise fixing the body 116 to the element 100 near one end ( it must be however free to twist at least a portion of the body to insure engagement with the line ). fig1 shows a cut 112 in element 100 which is not serpentine but has at least one shoulder ( though it may be curved and not at right angles as shown ) to prevent the stop body from sliding out of the element 100 . fig1 illustrates another advantage of the present invention . in this configuration the element 100 has a stop and the ends of the stop 130 are shown . the line 130 has a knot 150 ( or other fixed stop on the line ) and when the stop 114 is in its released / relaxed position , the element is free to slide along the line 130 . this might be a common occurrence in any use of this device . a common problem with heavy objects which are slideable is that they encounter fixed stops and with the stop the impact can damage the line . in the case known , the impact of a heavy sinker could snap the line or gradually weaken it . thus it would be desireable to prevent hard impacts . the ends 122 of the stop element provide the additional advantage that they cushion the impact of a slideable object against the shock of a fixed stop on the line . it is appreciated that this shock absorbing / protecting feature can be provided to any slideable element without the need for the stop / locking engagement feature of twisting the body 114 around the line 130 . in such case , the anti - rotation features of this device are not required . rather , only an elastomeric or other cushioning material extending from at least one end of the slideable element 100 . it will be appreciated that this detailed description of the invention and preferred embodiments is not all encompassing . to cover every possible variation would make this text impossibly long . instead , the inventive concepts and some preferred embodiments were explained in detail but deviation from the preferred embodiments to other structures within the scope of the inventive concepts is to be considered part of this invention .
the present disclosure relates to a locking device for use in releasably securing sliding elements to a line or filament and for cushioning the shock of impact of the sliding element against a line stop . the sliding element has a stop element located in a passage which runs the length thereof . the stop element is then twisted to engage the filament and is prevented from untwising by locking means . cushioning of impact with a line stop is accomplished by the elastomeric bumpers which extend from the stop element out of the sliding element .