Abstract: A rounded abutment member is mounted for reciprocative sliding movement in the normal direction with respect to the center of the face of a stringed racket, and hydraulic means is provided for automatically measuring the pressure required for the movement of the abutment member in the racket face abutting direction through a predetermined distance, such measurement being an indication of overall face string tension.

Abstract: A dispensing valve for carbonated beverage bottles having means for connection of the valve body to the bottle neck in place of its closure cap, and comprising a flexible tube extending therethrough and arranged to pass down into the bottom of the bottle at one end and to extend to the outside of the valve body as a dispensing spout at its other end. Mechanism within the valve body normally squeezes a portion of the flexible tube passing therethrough into collapsed, cut-off or sealing condition, subject to push-button actuation operative to release the tube for manual controlled dispensing of the pressurized fluid through the spout. The bottle connection means includes resilient washer mechanism for sealing the tube with respect to the valve body, thereby preventing pressurized fluid or gas leakage between the tubing and the valve body.