Abstract: A ball game apparatus comprises a control device (14, 24, 52, 60) which defines a predetermined range of allowable movements of a ball (10, 20, 40, 70) over space and time, sensing means (12, 22, 42) for detecting the actual movements of a ball, comparison means for comparing an actual movement to the predetermined range of allowable movements, and indicating means (16, 34, 54, 62) for indicating the output of the said comparing. The sensing means (12, 22, 42) comprises a multi-axis accelerometer contained in the ball and having accelerometer, gyroscope and/or magnetometer functions. The ball may be activated by an internal magnetically-operated switch (17, 22, 47). The control device and indicating means can be incorporated in the ball itself or in a separate portable computing device.

Abstract: A device (80) for reading a coded golf ball (40) comprises a helical track (82) on the inside or outside of a cylindrical housing (81), the track serving to change the orientation of the ball relative to an antenna coil (85) to ensure that the code is read. The track may be arranged horizontally and rotated by a motor; a flap (30) may be provided to avoid balls following each other too closely onto the helical track. Alternatively the track may be arranged vertically and the balls may fall under gravity.

Abstract: A tray (10) for supplying coded golf balls (50) to the tee (41) of a golf driving range comprises a first zone (11) for receiving golf balls, one of which is selected to be played by moving it by means of a club over a barrier (14) to a second (12) where it passes under gravity through an outlet (30) past a code reader (41) to the tee (41). An indicator light (46) is provided to confirm that the code has been read. The barrier (14) may have a grooved side (15) to assist transfer of the golf ball from the first zone (11) to the second zone (12).

Abstract: A golf driving range target (112) comprises pockets (150, 183) suspended for cables (146, 176), the pockets feeding received golf balls to a common receptacle. Between the exits (166) of the pockets and the common receptacle, the balls, which are coded, pass code-reading devices for identification. The pockets have walls (162, 165) which are shaped to direct received balls quickly to the exit (166) and may have internal ball-directing baffle members (163, 167). The pockets may be arranged concentrically or in an array.