Essay: Cricket throwing machine

The cricket throwing machine design is shown in FIG.1, FIG.2, FIG.3 and FIG.4. A ball 14 is placed through the tube 12 until the ball is within contact of wheel 16, as shown in FIG. 1. When the wheel 16 contacts with the ball 14, the ball is launched out of the tube 12. The angle of the wheel relative to tube 12 and ground 82 determines the type of pitch thrown by the machine. From FIG.3, the wheel angle may be determined by the user to create different types of pitches and range from zero to 360 degrees by the means of ring-sleeve 40. For example, different wheel angles are shown in FIG. 1: a zero degree angle 24, or 90-degree angle 28, or 135-degree angle 58, or 180-degree angle 30, or 315-degree angle 36.
Referring to FIG. 2, the ball 14 enters the tube 12 through the back end 84. The wheel 16 rotates on the shaft 18. From FIG. 3, the shaft support 70 is welded to the tube 12. Wheel 16 rotates and engage with ball 14 inducing a rotation to the ball 14 and launching it past the front end 86 and out of the tube 12. The rotational speed of wheel 16 may be varied so that a pitched ball may leave front end 86 with different ball speed. The tube 12 may be elevated up or down by angle 22 relative to ground 82, as shown in FIG. 3 by means of adjustable rod 60. The elevation of tube 12, the wheel speed and wheel 16 angle are all factors in creating different type of pitch.
The pitching machine is mounted on a tripod stand base 88. FIG. 3 shows the tube, shaft, shaft support, and the wheel mounted to a tripod stand base 88. From FIG.4, the tripod leg mount is arranged to mount three supporting leg 80 configured to support the tube 12 at a predetermined height above ground 82. In the design the supporting leg 80 have a selected length to position the machine body from above ground 82, which simulates the typical release point of an average bowler. A second, lower set of additional leg 90 may be coupled to the bottom ends of the first leg members 80 by a quick release connection. For example, the connection may be a snap-fit releasable connection.
Referring now to FIG. 3, the ring-sleeve 68 is attached to a ring-sleeve 40. Also, the tube 12 is fitted through ring-sleeve 40 permitting rotation to produce elevation or decrement of angle 22. A lock 48 is attached at the tube 12 along with ring-sleeve 40 thereby locking tube 12 and wheel 16 in place at an angle from zero to 360 during operation. Slots may be placed at predetermined locations on the ring-sleeve 40 to lock the pin 48 (and therefore the wheel) into position at particular angles.
The motor 54 is attached to metal casing 46 and rotates wheel 16. The motor 54 may be rotationally connected to wheel 16 by belts and pulleys, chains and sprockets or directly to shaft 18. The motor 54 may be an AC or DC electric motor or any other suitable motor.

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