| 摘要 |
An improved game racket is provided which includes a plurality of longitudinal and transverse strings disposed in parallel planes, and a unitary grid including a plurality of longitudinally-disposed first members disposed on a plurality of the longitudinal strings, and a plurality of transversely-disposed second members disposed on a plurality of the transverse strings so that the second members of the grid cross the first members thereof. The first and second grid members are bonded together at a plurality of crossing points so that the grid moves substantially as a unit with either the longitudinal or transverse strings of the grid when struck by a ball to increase the amount of top spin, back spin, or side spin imparted to the ball. In alternative embodiments, the grid includes either a plurality of longitudinally or transversely-disposed third members to provide an identical playing surface on either side of the racket. In addition, in the preferred embodiment, the grid members are provided with protuberances or roughened surfaces so as to increase the frictional engagement and the time span during which the grid members contact the ball to increase the spin imparted thereto. Also, the amount of spin imparted to the ball may be adjusted by varying the amount of tension on the longitudinal and transverse strings. Finally, the grid members may be in the form of elongated tubes or in the form of elongated guides or trackways.
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