Abstract: A training and playing tennis racket having indicia immediately above the handle for orienting the player's hand grasp for various strokes including the forehand, backhand, service, overhead and volley grips to aid the tennis player to position the appropriate grip readily during training and playing without cumbersome structure.

Abstract: A stamping press system, the press having a ram, a driving means for the ram, and an electrically energizable ram control device for causing the driving means to drive the ram through a stamping cycle. The press is guarded by a barrier movable between an open position permitting operator access to the point of stamping operation and a closed position barring such access. A press trip control for the system has a pair of actuators, one for each hand of the operator. Upon their concurrent actuation, the actuators cause movement of the barrier to the closed position and energization of the ram control device initiating a stamping cycle. Provision is included for preventing such energization thereby preventing a stamping cycle if the barrier is not closed. Circuitry of the system prevents re-energization of the ram control device, thus preventing a further cycle until the operator has removed both hands from the actuators.