Automatic net raiser for tennis courts - uses remote controlled motor operated by tokens or coins

摘要

In a games area where all games esp. tennis are played that require a net, the net is raised automatically by remote controlled motor when money or tokens are inserted. The net (1) for the ball game is suspended by a cable (2) from posts (3) to which the lower corners of the net are anchored (1a, 1b). Each post contains a vertical endless screw which is rotated by the electric motor (5). A vertical slot in each post allows the carriage (7) to traverse the screw to raise or lower the net. An enclosure (14) contains electrical protection equipment and also contains a token operated timer.