referring now more particularly to the drawings , and to those embodiments of the invention here presented by way of illustration , the device shown in fig1 includes a gripping means 10 here shown as simulating a baseball . the gripping means 10 is carried at one end of a line 11 which is trained over a pulley 12 . the opposite end of the line 11 then carries the resistance means 14 which is here shown as consisting of three weights 15 . the pulley 12 is mounted in a housing 16 which is carried by a bracket 18 . the bracket 18 is adapted to be supported at the top of a conventional interior doorway , and the details of the construction will be discussed below . fig2 of the drawings shows the gripping means 10 in detail . the gripping means 10 simulates a baseball , and the construction here shown utilizes an actual baseball as the gripping means . as is conventional for baseballs , the gripping means 10 includes a cork center 19 with a string winding 20 , and a leather cover 21 . a hole 22 is drilled through the ball to receive the end of the line 11 . the end of the line 11 has a stud 24 fixed thereto , as by crimping a receptacle at 25 . a conventional headed nut 26 , known as a riv nut , is threadedly received on the stud 24 to secure the line to the gripping means 10 . a washer 27 surrounds the line 11 and the hole 22 for a neat appearance . the preferred construction is illustrated in fig2 of the drawings ; however , it will be understood by those skilled in the art that numerous other forms of connection may be used . for an exercise device of the type here contemplated , it must be realized that silence of the device is important . the usual weight lifter may be accustomed to the clanging of metal weights , but the present device is designed for use by , for example , a baseball pitcher , who must concentrate on the technique for throwing . rattling , clanging , squeaking and other such noises emitted by the exercising apparatus would be highly distracting , and would greatly diminish the value of the device . one feature that reduces noise in the device of the present invention is the use of a stranded cable covered with a plastic such as vinyl . the cable preferably has a large number of strands for great flexibility , and a plastic covering for silence in use . such a line can be durably fixed to the gripping device 10 by having the stud 24 crimped onto the cable , the plastic covering being peeled back somewhat . fig3 shows the pulley 12 and the support means for the pulley 12 . first it should be mentioned that the pulley 12 must be quiet . in the preferred embodiment of the invention , the pulley is made of nylon , and no additional bearing is required . this arrangement is quiet , and is very satisfactory . it will be understood that other arrangements may be used , but may be more expensive . however , it will be obvious that other plastic materials may be used in lieu of nylon , the criteria being that a good bearing surface is provided , and that the pulley is quiet in operation . as shown in fig3 of the drawings , the pulley 12 is received within the housing 16 which is selectively fixable to the bracket 18 . the construction of the pulley housing 16 will be discussed in more detail below . the bracket 18 includes a pair of l - shaped members 28 and 29 , each of the l - shaped members having an inwardly turned ear 30 at its upper end . the lower arms of the l - shaped members 28 and 29 overlap , and are fixed together , as by a screw 31 . the screw 31 passes through a slot 32 in the l - shaped member 28 and a hole in the l - shaped member 29 . the screw 31 then passes through a hole in the pulley housing 16 so the entire assembly is secured by the one screw 31 . a thumbscrew 34 is threaded through a hole in the l - shaped member 29 , and the upper end of the screw 34 mounts a tip 35 , preferably made of rubber or the like . it should be understood from the above description that the bracket 18 will mount the pulley housing 16 ; then , the two members 28 and 29 of the bracket 18 can be adjusted so the ears 30 engage the top of a door casing . when the bracket 18 and the pulley housing 16 are properly adjusted , a nut will be tightened on the screw 31 to hold the parts as set , and the thumbscrew 34 will be used to tighten the tip 35 against the doorway . the bracket 18 is then ready for a person to exercise . fig4 shows the pulley housing 16 in more detail , and it will be seen that the housing 16 includes a c - shaped body 36 for receiving the lower legs of the l - shaped members 28 and 29 . a clevis 38 is fixed to the body 36 at one side thereof , the clevis 38 receiving the pulley 12 . a clevis pin 39 passes through the clevis 38 and the pulley 12 for rotatably mounting the pulley 12 . the clevis 38 is fixed at one side of the body 36 and this provides space for the holes 40 through the body 36 . it is contemplated that the center hole 40 will receive the screw 31 therethrough , though of course either of the other holes 40 could also be used . also , if a person wishes to mount the exercising device of the present invention somewhat permanently , it will be understood that the holes 40 may receive wood screws for fixing the pulley housing 16 directly to a doorway , or other surface . attention is now directed to fig5 of the drawings for a detailed discussion of the resistance means 14 . it will be noticed that there are three of the weights 15 shown , and it will be understood that any number of weights may be used as desired . a single weight may be used as a beginning , and one may add as many weights as desired , though it is contemplated that three weights is the maximum for general use . each of the weights 15 includes a lower portion 41 that is cylindrical , and an integral upper portion 42 that is frustoconical . an axial bore 44 extends from the uppermost end of the upper portion 42 to the interior cavity 45 . the interior cavity 45 has a lower portion 46 that is frustoconical , the base angle of the cone 46 being equal to the base angle of the cone of the upper portion 42 of the weight 15 . there is then a stepped cylindrical portion 48 of the cavity 45 . the bore 4 is designed to receive the line 11 therethrough . the end of the line 11 has a stud 49 fixed thereto , for example by a crimped receptacle as in fig2 of the drawings . a knurled finger nut 50 is threadedly receivable on the stud 49 . preferably , the stud 49 with the line 11 fixed thereto can pass through the bore 44 of the weight 15 . as a result , simply by removing the nut 50 , weights can be added or removed . when the desired number of weights is on the line , the nut 50 is threaded onto the stud 49 , and the nut 50 will bear against the flat area between the cylindrical portion 48 and the bore 44 . with the above description in mind , it will be understood that the exercising device of the present invention can be packed into a small space for storage . when the device is to be used , the bracket 18 with the pulley housing 16 will be fixed to a doorway . the line 11 will be passed over the pulley 12 , and through the desired number of weights 15 . since the angle of the frustoconical portion 42 of the weight and the frustoconical portion 46 of the cavity 45 are equal , the weights will nest tightly together . also , the cylindrical portion 48 of the cavity 45 assures that the tip of one weight will not engage the bottom of the cavity , so the weights are tightly urged together . once the apparatus is set up , a person can grasp the gripping device 10 and pull on the line 11 to begin the exercise . by way of example , if a baseball pitcher is using the device , the exerciser will grip the gripping means 10 in the same way he would normally grip a baseball for pitching . this act of gripping the gripping means 10 pulls specific muscles in the hand and arm . with these specific muscles in tension , the person will now position his arm as he would in pitching the baseball . thus , the baseball grip allows a sports specific training to be performed . the baseball grip and orientation of forces allow a superior exercise to be performed by synchronizing muscular function and joint rotation of the shoulder , elbow , wrist and hand , fluidly reproducing the act of throwing a baseball . now , as the arm is moved in precisely the way the arm would be moved to pitch a baseball , the person is working against the weights 15 of the resistance means 14 . due to the positioning of the pulley , the person can move his arm in any normal way a pitcher would move in an actual baseball game . each of these motions is carried out with the gripping means 10 gripped in the same manner as one would grip a baseball . the most important muscle group involved in throwing a baseball is the rotator cuff group . the present invention provides specific exercise for this particular muscle group , so superior results are achieved . since exactly the same muscles that are used in a baseball game can be exercised using the apparatus of the present invention , a pitcher can exercise the proper muscles to develop the muscles , or of course an injured player can exercise the muscles for purposes of rehabilitation . furthermore , the baseball pitcher was used only by way of illustration , and other positions on a baseball team , and other sports , can also use the device to advantage . a fielder might use the device to improve throwing ability , for example . other balls may be simulated to allow use in other sports . fig6 shows a modified form of gripping means designated at 10a . this device is designed to simulate a football . since a person grips only half of a football , only half the ball is required , so there is a generally hemi - ellipsoidal shape having the line 11 fixed to the gripping means 10a at the smaller end . rather than having a smooth surface like an actual football , the gripping means 10a comprises a plurality of facets 51 to provide a firm grip for exercising . other aspects of the invention are as discussed above and will not be repeated . it will therefore be understood by those skilled in the art that the particular embodiments of the invention here presented are by way of illustration only , and are meant to be in no way restrictive ; therefore , numerous changes and modifications may be made , and the full use of equivalents resorted to , without departing from the spirit or scope of the invention as outlined in the appended claims .
an exercising device is designed to exercise precisely the muscles , and groups of muscles , used in throwing a ball , such as in pitching a baseball . a simulated ball has a line fixed thereto , the line passing over a pulley , then receiving weights . the weights are designed to nest together to prevent relative movement therebetween . a bracket is fixable to an interior doorway to carry a pulley for directing the line for exercise . in exercising , one grips the simulated ball in the manner of the real ball , and exercises by moving the arm in the same manner one would throw the ball , thereby exercising exactly the same muscles and groups of muscles used in the sport represented by the simulated ball .