while the above - described description of the invention and drawings have been made in rather specific terms , it should be understood that various changes can be made in construction and operation without departing from the scope of the present invention . the inverted u frame , the braces attached thereto and the rectangular frame can be prepared from any suitable framing material . the framing can be round , square or any dimension as long as it provides the necessary function as noted above . in general , the framing is best prepared from tubular material , such as metal piping , plastic tubing and the like . the diameter of of the tubular material may vary , but is preferably between about 1 to 11 / 2 inches , although smaller or larger sizes can be employed . the dimensions , i . e . the height and width of the sections of the frame , can vary as desired or necessary to accomplish the desired purpose . for example , the frame can be in the shape of a square , rectangular or other shape as needed . in general , the inverted u frame is in the form of an open rectangle which may have a height of about 5 . 5 to 8 feet , and preferably 6 feet , and a width at the top of about 3 to 6 feet , and preferably 5 feet 8 inches . the braces used to support the inverted u frame in an upright position should be of sufficient length to have the inverted u frame sloping forward at the desired angle . in general , the inverted u frame should preferably slope forward at an angle varying from about 50 to 70 degrees measured at ground level . still more preferably the braces maintain the inverted u frame so that the angle at the ground is about 60 degrees . as shown in the drawings , the braces are attached near the top of each of the legs of the inverted u frame and then slope downward to maintain the frame at the proper angle . the braces are preferably movably attached to the frame so that on disassembly the braces can be folded back against the inverted u frame . this can be accomplished by the use of the u shaped lach means attached to the sides of the frame as shown in fig5 a . the braces can also be removed from the frame by merely removing the bolt means used to join the braces to the frame legs . the rectangular frame can also vary in size and shape as desired and necessary . as shown in the drawings , the rectangular frame preferably fits inside the inverted u frame and the braces so the width of the frame should be so adjusted . less preferred method is to have the frame on the outside of the inverted u frame as the operation becomes less efficient with that construction . as noted , the rectangular frame is made up of 2 opposite sides , a front section and a back section . the dimensions of these parts can vary as desired . as noted also it is important to have a reinforcing u frame which extends beyond the legs of the inverted u frame so as to give the total structure the necessary stability when used for baseball training . in order to accomplish this reinforcement to prevent damage by the baseballs , the opposite sides of the rectangular frame are extended beyond the legs of the inverted u frame and the joined to the back ed of the same frame as shown in fig1 . the extended reinforcing u frame is preferably extended beyond the inverted u frame legs from about 10 inches to about 11 / 2 feet , and and has a width equal to the width between the inverted u frame legs . as noted above , the front section of the rectangular frame is formed into a v so as to provide a slope for the balls to rapidly roll down into the opening at the point of the v . the slope of the v can vary as long as it provides enough incline for the balls to roll into the opening at the point of the v . in most cases , a slope of from 10 to 20 degrees is sufficient to obtain the desired roll of the ball . the point of the v is from 10 to 25 inches , and preferably 15 to 25 inches from the ground . a metal l shaped plate possessing openings for the bolt means from the ball expelling machine is welded onto the front of the v shaped front section . at least two holes in the said plate are necessary to keep the machine in a straight line and firmly attached to the frame . the sides of the rectangular frame can be firmly attached to the lefts of the inverted u frame and braces or they can be removably attached as shown in fig5 b to assist in the disassemblying of the apparatus . in this case , one end of the side frame is joined by bolt means to the front brace and the other end is removably attached to the inverted u frame leg by means of a latch that fits over a peg on the leg . the netting to be stretched across the frames and hung loosely from the top of the inverted u frame can be of any suitable type as long as it provides support for the stopping and controlling the path of the baseballs . the netting as such can vary in weight ( denier ) as well as the type and size of filament . in general , the netting is preferably made of nylon filaments of about 10 to 18 mils and has openings varying from about 1 to 2 inch squares . the netting may be attached to the frame in any suitable manner . the netting can be held by cords tied around the frame or by snaps or by being sown onto canvas sleeves which can be slipped over the frame pieces . as shown in fig1 nylon webbing can sometimes be used to hold the netting against the frame . the ball expelling machine can be constructed in a variety of ways as long as it brings about the desired pitch of the baseball . the wheel to be used as the impelling force is preferably of small size , and generally varies from about 4 . 5 to 6 inches in diameter . the wheel can be made of any suitable material , such as iron , plastic , and the like , but preferably has a layer of rubber or polyurethane of about 1 / 4 to 1 / 2 inches in thickness on the outside circumference of the wheel . the power used to operate the wheel may vary but is preferably derived from an electric motor , and preferably a variable speed motor of about 1 / 5 to 2 horsepower to obtain at least 10 , 000 rpm . the lever used to adjust the pitch of the ball as it exits the housing should be constructed as shown in fig7 a . the lever plate is preferably prepared from about 1 / 4 inch sheet metal with the 1 / 5 to 12 inch rods welded underneath at the front and back of the said lever . the rods extend out from the sides of the lever so that they may be inserted into the adjustment holes in the side of the housing as shown in fig6 and 7 . two springs attached to the outside edge of the lever snaps the lever in place after it has been moved to the proper adjustment location . the manner of adjusting the lever to obtain the desired types of pitched balls is shown in fig7 . by adjusting the lever as shown in that figure , the expelled ball can be made into a pitched grounder wherein the rods are in position c12c and 21f , or the ball can be made into a pop fly by having the rods in position 21d and 21g , or the ball can be a straight pitch by having the rods in positions 21b and 21e . a specific embodiment of the new multipurpose ball expelling apparatus of the present invention and illustration of its use are illustrated below . an inverted u frame was prepared from 11 / 4 inch metal pipe . each leg was approximately 6 ft long and the top of the u frame was about 5 ft 8 inches in length . support braces about 6 ft long were prepared from the same plastic tubing and adjustably attached to each of the legs of the inverted u frame approximately 6 inches from the top of the frame . 2 inch bolts were used to attach the braces to the frame . a rectangular frame was then attached to the inside of the inverted u frame and the leg braces as shown in fig1 . the front section of the rectangular frame was in a v shape with the slope approximately 20 degrees from the center point of the v . the center point of the v was approximately 15 inches from the ground . the sides of the rectangular frame were adjustably connected to the legs of the inverted u frame as shown in the drawings so that the frame could be easily dissassembled and fold up when not in use . a u shaped tubular frame of about 1 ft by 5 . 5 ft dimension was joined to the legs so as form the reinforcement frame as shown in fig1 to add support to the frame when baseballs are thrown back into the net on the frame . nylon neting prepared from 18 mil filaments with spacings of about 1 / 2 inch was stretched over the rectangular frame and the back of the inverted u frame as shown in fig1 . the netting was held on the frame by binding with nylon rope . a loose netting was bound on the top of the inverted u frame and allowed to hang loose down to the netting on the frame . a ball expelling machine was prepared by forming a housing of sheet metal as shown in fig4 . the openings for the balls at the top of the housing was about 4 × 4 inches . the housing of the ball expelling machine was attached to the bottom section of the rectangular frame at the point of the v by means of two bolts welded to the top of the housing and inserted into two openings on an l shaped metal ledge welded to the frame . the wheel inside the housing was a cast iron wheel of about 4 inches in diameter and 11 / 4 inches in thickness . a 1 / 2 inch layer of hard rubber was attached to the outside circumference of the wheel . the wheel was turned by direct drive from a 1 / 5 horespower 10 , 000 rpm electric motor using 5 / 8 inch shaft . a metal ledge under the wheel followed the contour of the wheel and was the baseball distance from the said wheel . the front end of the ledge terminated over the top of a movable lever which could be raised or lowered to provide different types of pitched balls as shown in fig7 . rods attached to the bottom of the front and back of the lever fitted into the openings on the outside of the housing as shown in fig6 . the lever was held tightly in place by the springs on the outside of the housing . the ball expelling machine was then attached to the frame as described above and put into operation for training of fielders . the fielder threw the baseball against the loose netting which then bends back against the netting on the inverted u frame and the ball then drops down onto the tight netting of the rectangular frame and rolls into the opening at the point of the v at the front of the rectangular frame . the ball then drops down into the opening of the ball expelling machine and is rapidly forced out of the opening at the front of the ball expelling machine . by adjusting the lever in the machine as shown in fig7 the expelled ball can be made into a grounder , pop fly or straight pitch . the fielder then gets experience in retrieving the ball and throws it back into the net of the apparatus and the process is repeated . for the training of a pitcher , 2 inch strips of canvas are attached to the loose netting hanging down from the invert u frame and placed at the location of a typical strike zone as shown in fig2 . a pitcher then stands in front of the apparatus at the correct pitching distance and attempts to pitch the ball into the strike zone area . when the ball hits the strike zone on the net , the ball forces the loose netting against the back netting and the ball falls down onto the netting on the rectangular frame and rolls into the opening at the front of the apparatus and then into the ball expelling machine . the ball is then expelled out to the pitcher and he again attempts to pich the ball into the strike zone . for the training of a batter , the lever on the ball expelling machine is set for the straight pitch , and the ball placed on the net where it rolls down into the ball expelling machine and is pitched out as a straight pitch . the batter in front of the machine then attempts to hit the ball either back into the the netting or to the side or over the netting . if the ball is hit into the netting , the ball will again go into the ball expelling machine and expelled out for the batter to make another attempt at hitting the ball .
a multi - purpose ball expelling apparatus which can be used with repeated operations for the training of baseball fielders , batters and pitchers comprising in combination a special netted frame in which a ball can be thrown , collected and pass into a special ball expelling machine which can be adjusted to expell the ball as a grounder , pop - fly or straight pitch . an inverted u - shaped frame is in a generally vertical plane and has a net stretched tightly across it . a brace is connected to each side leg of the u . a rectangular frame is supported in a generally horizontal plane by the u - shaped frame and braces . a second net is also stretched tightly across the rectangular frame . the rectangular frame downward somewhat toward its front edge to direct a ball into the expelling machine . a third net is attached to the top of the u - shaped frame and hangs loosely down to the net on the rectangular frame . this third net has a rectangular opening which serves as a baseball pitching target .