| 摘要 |
890,352. Tennis practising appliances. KALLAI, O. Nov. 15, 1960, No. 39224/60. Class 132(2) Tennis training apparatus has an adjustable ball returning surface 4 provided with a movable horizontal strip 6 to which a bell 9 is connected by cords, the strip 6 being mounted at a height corresponding to the upper side of a tennis net so that balls played correctly are not returned by surface 4 but pass through an opening therein,the bell 9 signalling such a stroke. A stop net 12 and catching net 10 lead balls back to the player and the apparatus is adjustably mounted on stands 1 by a shaft 2. |
