Apparatus to serve aid and finally for determining offsides during a football game. (Machine-translation by Google Translate, not legally binding)

摘要

Apparatus to serve as help to the line judge for the determination of outside of game during a game of soccer; characterized in that it comprises a control unit located outside the playing field, equipped with a receiver of the waves generated by an emitter carried by the line judge or located nearby, bouncing in the latter case the waves in it before reach the receiver; the control unit drives a variable speed motor that drives a transmission defined by a reducer and, such as, a conveyor belt of an indicator that is at all times aligned with the line judge parallel to the bottom line of the field, for which the engine is equipped with an encoder that informs the control unit of the position and speed of the indicator. (Machine-translation by Google Translate, not legally binding)