fig1 illustrates a sinker 10 in an open position that can releasably clamp around a line 11 . the sinker 10 ( or float , but hereinafter referred to primarily as a sinker only ) comprises two members , an upper half 12 and a lower half 13 . in the embodiment illustrated in fig1 to 8 , the halves 12 and 13 are hinged about point 14 such that the two halves 12 and 13 can open , receive a line 11 , and close around or on the line 11 ( e . g . as seen in fig2 ). each of the halves 12 and 13 comprise an inner 15 made of a high or low density material . the density of the inner material 15 largely determines whether the sinker 10 sinks of floats in water . for example , if the inner material 15 is high density ( e . g . lead ) the sinker 10 will sink in water , and if the inner material 15 is low density ( e . g . a floatation chamber or hollow plastic member ) the ‘ sinker ’ 10 will instead be a float ( although this is referred to as a ‘ sinker ’, no limitation is meant thereby ). each half 12 and 13 also has a jacket 16 that receives and retains the inner material 15 . the jacket 16 is preferably made of plastic , or any other suitable material , such that the halves 12 and 13 are hinged at point 14 by a flexible or resilient portion of the jacket 16 . the jacket 16 may be made entirely of a flexible or resilient material , or alternatively , only the hinged point 14 may be flexible or resilient . the hinge is preferably a live hinge and may either protrude externally , or be recessed ( as shown in the figures ). the jacket 16 also has a locking means in the form of a tab 17 on the upper half 12 that locks with a corresponding portion 18 on the lower half . the locking tab 17 has an aperture 19 which receives a protrusion 20 on the corresponding portion 18 as shown in fig2 to 5 and fig8 . it is envisaged that other locking means could also be implemented , such as a locking tab without an aperture that engages with a lip or edge on the lower half , or a hook , latch , twisted tie , etc . the jacket has apertures , or eyelets , 21 that receive a corresponding portion of the inner material 15 and retain the material 15 within the jacket 16 . the jacket 16 also referably is shaped to align the inner material 15 . this is shown as an indentation in fig8 , and also as a ridge 22 in fig9 that is received by a corresponding depression 23 in the inner material 15 ( although fig9 is for a different embodiment this feature could also apply to the embodiment shown in fig2 to 8 ). each of the halves 12 and 13 have a raised portion 24 which is received by a corresponding recessed portion 25 when the sinker 10 is in the closed position ( this is best illustrated in fig8 ). when the two halves 12 and 13 are in the closed position , the inner surface of the two halves 12 and 13 defines a channel 26 through which the line 11 passes ( also best illustrated in fig8 ). the raised and recessed portions 24 and 25 are adjacent the channel 26 to facilitate aligning the line 11 with the channel 26 , and also to prevent the line 11 from wedging in the channel 26 . a further advantage of the raised and recessed portions 24 and 25 is that they provide the sinker 10 with more support and strength in the closed position . for example , any force applied to one half is spread across the hinge 14 , the locking tab 17 , and the raised and recessed portions 24 and 25 , as opposed to just the hinge 14 , the locking tab 17 . as the hinge 14 and locking tab 17 are made of plastic , the added strength / support of the raised and recesses portions 24 and 25 can therefore be significant . as illustrated in fig2 to 4 , 5 d , 5 e , and 9 a surface 27 is provided on which branding or advertising can be stamped , moulded , printed , or attached to . an example with branding present is illustrated in fig9 . furthermore , the jacket 16 may be coloured and / or textured to provide a particular look and feel sinker , other than could usually be provided with a standard single material sinker , such as those made of lead . for example , the jacket 16 may be coloured to indicate different size or weight sinkers , and may be textured to provide additional grip to the operator . illustrated in fig9 is a different embodiment of the invention . the embodiment in fig9 doesn &# 39 ; t have a hinge or hinged portion 14 , and instead is in two discrete halves which clip together . other than having an addition locking means instead of a hinge , the embodiment in fig9 is very similar to that illustrated in fig1 to 8 . it can be realised from fig9 that the inner material 15 can be removed from the jacket 16 and replaced relatively easily . the inner material 15 is aligned by the ridge 22 and depression 23 . the area surrounding the apertures 21 of the jacket 16 are temporarily deformed ( pushed back ) to allow the inner material 15 to pass and then return to their original position holding the inner material 15 in place . the inner material may have indentations 28 which correspond with the portion of the jacket 16 surrounding the apertures 21 , the indentations 28 aid to enable engagement of the inner material 15 by the jacket 16 . although the only view of the inner material 15 separated from the jacket 16 is shown in the embodiment shown in fig9 , this is not to be regarded as limiting as the inner material 15 could also be removed from the jacket 16 shown in the embodiments in fig1 to 8 in a similar manner . the removal and replacement of the inner material 15 allows not only replacement of the inner material if it gets damaged ( e . g . corroded ), but also allows the nature of the sinker 10 to be changed by inserting a different inner material 15 . for example , the inner material 15 could be easily changed from a high density material to a low density material , or vice versa . in use , the sinker 10 of the invention can quickly and easily be placed on a line 11 by opening the sinker 10 ( if it is closed ), placing the line 11 in the channel 26 , closing the sinker 10 , and using the sinker 10 as desired . then , to remove the sinker , the sinker 10 is opened and removed from the line 11 . no cutting , tying , or alteration of the line is necessary to apply or remove the sinker 10 . furthermore , the sinker 10 is completely reusable . the sinker can even be applied when the line is in use . for example , if the bait is moving with current , a sinker 10 can be added to the line above water and it will run down the line to the trace . although the sinker 10 has typically been explained with use to being applied around a line , it is also envisaged that the sinker 10 could be constructed so that it is applied onto the line ( i . e . does not move on the line ). this could be effected by changing the diameter or layout of the channel , or by adding a clamping , or restricted portion . the sinker 10 may be scaled up or down to match any appropriate situation , including both commercial and / or domestic applications . the size of the sinker 10 can be altered to accommodate different lines , and or suit the sinker 10 for different applications . the materials described above are not to be regarded as limiting as other suitable materials that are readily available could also be used . it is to be understood that the terminology employed above is for the purpose of description and should not be regarded as limiting . the foregoing embodiments are intended to be illustrative of the invention , without limiting the scope thereof . the invention is capable of being practised with various modifications and additions as will readily occur to those skilled in the art . throughout this specification , including the claims , where the context permits , the term “ comprise ” and variants thereof such as “ comprises ” or “ comprising ” are to be interpreted as including the stated integer or integers without necessarily excluding any other integers .
a sinker or float that releasably clamps around a line , such as a fishing line , including two members shaped to define a channel for the line when in a closed position . a locking means is provided to releasably lock the two members in the closed position . each of the members has at least a portion of high or low density material to provide a sinking or floating effect . a jacket may be provided that retains the high or low density material therein . the jacket may also include a hinge portion such that the two members can be hingedly opened and closed .