referring to the drawings , and particularly to fig3 and 4 thereof , there is illustrated a guide rail splice sleeve 50 in accordance with the present invention . in general , the guide rail splice sleeve 50 is adapted to detachably receive two adjacent guide rail segments in a manner whereby either guide rail segment 30 , 31 may be attached , detached , adjusted , moved , or slide independent of the other segment . referring still to fig3 and 4 , the guide rail splice sleeve 50 in accordance with the present invention preferably includes an elongated central member 1 , a first tension bar detachably connected to a first end 4 of the central member 1 , a second tension bar 3 detachably connected to a second , opposite end 5 of the central member 1 , and two retention means 55 , 60 which secure the tension bars 2 , 3 to the central member 1 as well as tighten or loosen corresponding guide rail segments 34 , 35 when placed between the central member 1 and tension bars 2 , 3 . the sleeve 50 preferably includes an elongated central member 1 . the central member 1 is constructed in a substantially stepped design , having a first or top section 6 having an edge 9 , a downwardly extending second , generally vertical section 7 , and a third or outwardly extending section 8 having an edge 11 . an angle α of approximately 90 degrees is formed between the top section 6 and the vertical section 7 . the member 1 has a first end 4 and an opposing second end 5 . the sleeve 50 includes a first tension bar 2 constructed in a substantially stepped design , having a first or bottom section 12 , an upwardly extending second or vertical section 13 , and a third generally horizontally extending top section 14 . an angle β of approximately 80 degrees is formed between the bottom section 12 and the vertical section 13 . the first tension bar 2 is preferably less than one - half the length of the central member 1 and is arranged , as described in more detail below , to be detachably connected to the first end 4 of the central member 1 . when so connected , the end 43 of the first tension bar 2 and the end 41 of the central member 1 both preferably terminate along the same plane . that is , both ends are preferably flush . the sleeve 50 includes a second tension bar 3 constructed in a similar manner as the first tension bar 2 to define a substantially stepped design , having a first or bottom section 15 and an upwardly extending second or vertical section 16 , and a third , generally horizontally extending top section 17 . an angle γ of approximately 80 degrees is formed between the bottom section 15 and the vertical section 16 . the second tension bar 3 is preferably less than one half the length of the central member 1 and is arranged , as described in more detail below , to be detachably connected to the second end 5 of the central member 1 . when so connected , the end 46 of the second tension bar 3 and the end 5 of the second end 46 of the central member 1 both preferably terminate along the same place . that is , both ends are preferably flush . of course , it will be easily understood by those skilled in the art that the ends 43 , 46 of the first and second tension bars 2 , 3 do not need to be flush with the ends 41 , 42 of the central member 1 to accomplish the purpose of the present invention . moreover , the angles α , β , and γ may be altered to accommodate guide rails of various shapes and sizes known in the art . the first and second tension bars 2 , 3 may be interchangeable and are distinguished herein only for clarity purposes . because the tension bars 2 , 3 have a length which is less than one half the length of the central member 1 and one end 43 , 46 of each tension bar 2 , 3 is arranged to be flush with an end 41 , 42 of the central member 1 , a central portion 65 is created between the interior ends 44 , 45 of the first and second tension bars 2 , 3 ( see fig3 ). a first retention means 55 is provided for detachably securing the first tension bar 2 to the first end 4 of the central member 1 . preferably , this means includes one or more fastening devices for detachably engaging the first end 4 of the central member 1 with the first tension bar 2 . this engagement is achieved by aligning holes 18 , 19 ( see fig4 ) extending through the horizontal section 8 of the central member 1 with holes 22 , 23 extending through the horizontal section 14 of the first tension bar 2 . when the holes 18 , 19 in the central member 1 at its first end 4 are aligned with the holes 22 , 23 in the first tension bar 2 , a fastening device 26 , 27 may be passed or inserted through the aligned holes 18 , 19 , 22 , 23 . when fastened , the end 41 of the first end 4 of the central member 1 and the end 43 of the first tension bar 2 remain preferably flush . a second retention means 60 is similarly provided for detachably securing the second tension bar 3 to the second end 5 of the central member 1 . preferably , this means includes one or more fastening devices for detachably engaging the second end 5 of the central member 1 with the second tension bar 3 . this engagement is achieved by aligning holes 20 , 21 in the horizontal section 8 of the central member 1 at its second end 5 with holes 24 , 25 through the horizontal section 17 of the second tension bar 3 . when the holes 20 , 21 through the second end 5 of the central member 1 are aligned with the holes 24 , 25 through the second tension bar 3 , a fastening device 28 , 29 may be inserted through the holes 20 , 21 , 24 , 25 . when fastened , the end 46 of the second end 5 of the central member 1 and the end 42 of the second tension bar 3 are preferably flush . of course , it will be easily understood by those skilled in the art that the ends 43 , 46 of the first and second tension bars 2 , 3 do not need to be flush with the ends 41 , 42 of the central member 1 to accomplish the purposes of the present invention . similarly , the first and second tension bars 2 , 3 need not be in any particular order and may be interchanged . moreover , there is no requirement that the first and second ends 4 , 5 of the central member 1 and the first and second tension bars 2 , 3 have precisely two holes . rather , the central member 1 or the tension bars 2 , 3 may have one or more holes , regardless of the number of holes which the other elements ( central member 1 and tension bars 2 , 3 ) have . additionally , it is contemplated that the retention means 55 , 60 , preferably a bolt 26 , 27 , 28 , 29 , may be permanently affixed to either the central member 1 or the tension bars 2 , 3 as will be easily understood by those skilled in the art . a first guide rail channel 70 ( fig7 ) is formed when the first tension bar 2 is secured to the central member 1 as described above . so arranged , these members 1 , 2 cooperate to define a channel 70 characterized by a 80 degree angle α between the top section 6 and downwardly extending vertical section 7 of the central member 1 at its first end 4 , and an 80 degree angle β between the bottom section 12 and upwardly extending vertical section 13 of the first tension bar 2 . more specifically , the top section of the channel 70 is formed by the top section 6 of the first end 4 of the central member 1 , the bottom section of the channel 70 is formed by the bottom section 12 of the first tension bar 2 , and the vertical section of the channel 70 is formed by the abutting downwardly extending vertical section 7 of the first end of the central member 1 and the upwardly extending vertical section 13 of the first tension bar 2 . this arrangement also defines a back flange area formed by the bottom section 8 of the first end 4 of the central member 1 and the top section 14 of the first tension bar 2 . the channel 70 thereby formed is adapted to receive a first guide rail 34 . a second guide rail channel 75 is similarly formed by the attachment of the second tension bar 3 to the central member 1 as described above . so arranged , these members 1 , 3 define a channel 75 characterized by an 80 degree angle α between the top section 6 and downwardly extending vertical section 7 of the second end of the central member 1 and an 80 degree angle γ between the bottom section 15 and upwardly extending vertical section 16 of the second tension bar 3 . more specifically , the top section of the channel 75 is formed by the top section 6 of the second end 5 of the central member 1 , the bottom section of the channel 75 is formed by the bottom section 15 of the second tension bar 3 , and the vertical section of the channel 75 is formed by the abutting downwardly extending vertical section 7 of the second end 5 of the central member 1 and the upwardly extending vertical section 16 of the second tension bar 3 . this arrangement also defines a back flange area formed by the bottom section 8 of the second end 5 of the central member 1 and the top section 17 of the second tension bar 3 . the channel formed thereby houses the second guide rail 35 . as stated above , the two retention means 55 , 60 are provided for detachably securing the first and second tension bars 2 , 3 to the respective ends 4 , 5 of the central member 1 . when tightened , each retention means also acts to grip and secure a guide rail segment 34 , 35 positioned within the channel 70 , 75 . this gripping ability results from the interrelationship between each tension bar 2 , 3 and the central member 1 as will be easily understood by those skilled in the art . preferably , a conventional nut and bolt is used to adjust the gripping force , thus allowing selective tightening or loosening of a guide rail segment 34 , 35 in the sleeve 50 . more specifically , in accordance with the preferred embodiment , a bolt 26 , 27 , 28 , 29 is passed through the horizontal or third sections 8 , 14 , 17 of the central member 1 and tension bars 2 , 3 . a nut 30 , 31 , 32 , 33 is then threaded onto that portion of the bolt 26 , 27 , 28 , 29 extending through the sleeve 50 to its opposite side . tightening of each bolt 26 , 27 , 28 , 29 creates an inwardly directed force onto the top 6 , and bottom 12 , 15 surfaces of the channel 70 , 75 . this force secures a guide rail 34 , 35 when accepted into the channel 70 , 75 as will be understood by those skilled in the art . selective tightening or loosening of the bolt fastening device accordingly grips or releases the guide rail 34 , 35 . advantageously , the nuts 30 , 31 , 32 , 33 cannot spin because they abut up against the vertical sections 13 , 16 of the tension bars 2 , 3 , this aids in loosening and tightening the retention means 55 , 60 . it may now be understood that when the fastening means are loosened , each tension bar 2 , 3 may move with respect to the central member 1 , such that each channel 70 , 75 is larger than a guide rail segment 34 , 35 positioned therein . in this state , the segments 34 , 35 are readily inserted into or removed from the channel 70 , 75 . this allows a first guide rail 34 to be adjusted , moved , or slid while a second guide rail 35 remains secure or , alternatively , the second guide rail 34 to be adjusted , moved , or slid while a first guide rail 34 remains secure . additionally , both guide rails 34 , 35 may be simultaneously adjusted , moved , or slid . when , however , the fastening means are tightened ( as by tightening the bolts 26 , 27 , 28 , 29 in the embodiment illustrated in fig3 and 4 , and cross sectionally viewed in fig5 ) the horizontal or “ flange ” sections 14 , 17 of the first and second tension bars 2 , 3 are brought into rigid and secure contact with the horizontal or “ flange ” section 8 of the central member 1 . when so tightened , because the outwardly extending first portion 12 , 15 of each tension bar 2 , 3 extends upwardly to an angle of less than 90 degrees ( 80 degrees , approximately ), this portion of the sleeve presses upwardly or “ inwardly ” towards the first section 6 of the central member 1 , tightly squeezing and securing the guide rail segment 34 , 35 positioned therebetween . as may also now be understood , the sleeve 50 of the present invention permits a user to selectively tighten or loosen the adjacent guide rail segments 34 , 35 independently from one another . for example , the user may loosen the retention means 55 corresponding to the first tension bar 2 and thus release a guide rail segment 34 secured in the first guide rail housing area defined in part thereby , without disturbing the secure connection of the sleeve to the second guide rail segment 35 , or vice versa . advantageously , one guide rail may thus adjust , move , or slide away from or towards another guide rail which remains secured in the sleeve . in accordance with a second embodiment of the present invention , and referring to fig6 the sleeve 50 incorporates a hand tightening device 36 a in the retention means . this embodiment of the invention is similar to that described above and illustrated in fig3 - 5 , and as such , like reference numeral have been given to similar parts , except that an “ a ” designator has been appended thereto . the hand tightening device 36 a is preferably constructed of molded plastic and comprises a bolt portion 37 a and a handle portion 38 a . the bolt portion 37 a is inserted through the flange section 8 a of the central member 1 a and the corresponding tension bar 2 a , 3 a . a nut 30 a threadingly engages the bolt portion 37 a urges the fashion , as known in the art . clockwise rotation of the bolt portion 37 a urges the device 36 a toward the nut 30 a , thereby tightening the retention means , and counterclockwise rotation of the bolt portion 37 a loosens the nut - bolt connection , thereby loosening the retention means . the handle portion 38 a partially houses the bolt portion 37 a and extends radially to form a handle by which an operator may grip and rotate the device 36 a . a ratchet mechanism 39 a lies between the bolt portion 37 a and the handle portion 38 a to allow rotation of the device 36 a in confined areas . this arrangement is advantageous since it allows a user of the guide rail splice sleeve of the present invention to make adjustments without the need for a wrench or similar tool to tighten and loosen the fastening and gripping means . of course , it will be easily understood by those skilled in the art that other retention means may be used other than the hand tightening device 36 a to accomplish the purposes of the present invention . moreover , the present invention contemplates interchangeable use of the hand tightening device 36 a and other fastening means on a sleeve 50 . that is , a sleeve 50 may incorporate one or more hand tightening devices and one or more other fastening devices such as screws and bolts . another preferred embodiment of the present invention is illustrated in fig8 and 9 . this embodiment of the invention is similar to that described and illustrated above , and as such , like reference numerals have been given to similar parts , except that a “ b ” designator has been added thereto . in this embodiment , the sleeve preferably incorporates an extension guide rail 40 b removably secured to the central member 1 b and arranged to span and gap between the first and second tension bars 2 b , 3 b . attachment of the extension 40 b to the central member 1 b is accomplished by aligning holes 41 b , 42 b passing through a mounting portion 39 b of the extension 40 b with the interior holes 19 b , 20 b in the central member 1 b . when aligned , a bolt 27 b , 28 b or similar fastener may be inserted through the holes 19 b , 20 b , 41 b , 42 b to secure the extension rail 40 b beneath the sleeve 50 b . as may be appreciated , if the ends of two adjacent guide rail segments 34 b , 35 b do not meet at the sleeve connection , a space exists therebetween . items moving along a conveyor which encounter this gap may become lodged with the gap against an end of the guide rail segment . in addition , the guide rail end may damage packaging or the like . in accordance with the present invention , the extension 40 b serves as a “ bridge ” between spaced guide rail segments 34 b , 35 b so that an effective continuous guide rail is provided . the extension 40 b may be arranged to include a plastic guide section facing inwardly towards the items moving along the conveyor , or other arrangements similar to the guide rails currently in use as will be understood by those skilled in the art . it is noted that while the guide rail extension 40 b is preferably positioned below the sleeve 50 b , it is possible to mount the extension 40 b above the sleeve 50 b , as long as in the particular application in which the extension is used the extension remains in a position for engagement with the items on the conveyor . in addition , the extension 40 b may have a length which is greater than the spacing between the inwardly facing ends of the tension bars 2 b , 3 b , but the length is preferably less than the overall length of the central member 1 b . in this fashion , the extension 40 b serves its intended purpose even if the gap between the ends of adjacent rails is larger than the space between the tension bars 2 b , 3 b . generally , however , the gap between adjacent rails rarely exceeds two inches in length . referring to fig3 and 4 , in the preferred embodiment , the members 1 , 2 , 3 are all constructed of stainless steel . stainless steel was chosen for its strength , low cost , and ability to be easily cleaned , which are commonly required of guide rail mounting devices used in assembly line operations . the ability to be easily cleaned becomes especially important when the sleeve is used in food preparation situation . moreover , stainless steel can be polished to a smooth surface . however , there is no requirement that stainless steel be used . rather , other metals , plastics , composites , or other similar materials may be used depending on the requirements which are demanded of the sleeve . in the preferred embodiment , the central member 1 is approximately eight inches in length , with a top section 6 width of approximately three eighths of an inch , a downwardly extending vertical section 7 width of approximately one quarter of an inch , and a bottom section 8 width of approximately one half of an inch . the first and second tension bars 2 , 3 are both approximately three inches in length with a bottom section 12 , 15 width of approximately three eighths of an inch , an upwardly extending vertical section 13 , 16 width of approximately one quarter of an inch , and a top section 14 , 17 width of approximately one half of an inch . the holes 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 located on the central member 1 and first and second tension bars 2 , 3 are approximately three eighths of an inch in diameter . the threaded bore through each nut 30 , 31 , 32 , 33 and the threaded shaft of each bolt 26 , 27 , 28 , 29 are also approximately three eighths of an inch in diameter and of conventional design . however , there is no requirement regarding these specifications and should be varied based upon the specific application of the sleeve 50 . for example , conveyor systems utilized by large automobile parts manufacturers may tend to require larger specifications while conveyor systems utilized by small electronics manufacturers may tend to require smaller specifications . in addition , while the fastening means described above have been described as an interengaging nut and bolt , other fasteners are contemplated . for example , the fasteners may comprise clamps or clips . also , threaded shafts may extend from each tension bar 2 , 3 and be formed integrally therewith for passing through corresponding holes in the central member 1 , thus eliminating the need for separate bolts and the holes through the tension bars . alternatively , the threaded shaft may be integral with an extend from the central member 1 which will be understood by those of skill in the art . while in the preferred embodiments the ends 41 , 42 of the central member 1 and an end 43 , 46 of each tension bar 2 , 3 are arranged to be flush when these members are connected , it is contemplated that the ends 41 , 42 , 43 , 46 are not flush . for example , the central member 1 may have its end 41 , 42 extend beyond the end 43 , 46 of either or both tension bars 2 , 3 connected thereto . the embodiments illustrated and described above are provided merely in examples of the sleeve 50 constructed in accordance with the present invention . other changes and modifications can be made from the embodiments presented herein by those skilled in the art without departure from the spirit and scope of the invention , as defined by the appended claims .