TRANSFORMABLE APPARATUS FOR TRAINING LONG JUMPERS Russian patent published in 1994 - IPC

FIELD: sports. SUBSTANCE: push-off bar is installed on take-off track by means of screw clamps. Sportsman landing sand box is disposed below the floor level, and is provided with a device for loosening and levelling of sand. Flexible covering is stretched above the box and the loosening-levelling device on shock absorbers. Electrically-operated box cover has the shape of a shutter mounted on drums and arranged longitudinally above the box. The means for measuring the length of the jump comprises longitudinal rows of conducting buses mounted on covering, and flexible conducting strips contacting with said buses in the landing zone. Buses are electrically connected with recording instrument and display. Installed on side of sand box is a drive of the device for loosening and levelling of sand. EFFECT: improved design. 3 cl, 20 dwg