| 主权项 |
1. A system for projecting a laser across an athletic football field, comprising:
a first laser projection module and a second laser projection module adapted to travel parallel to the athletic field within a beveled elongated track having a slot that extends the entire length of said track, said track being positioned parallel to and within one foot of one sideline on a football field; wherein said first laser projection device and said second laser projection device are configured to travel within the slot and project a beam across the athletic field, and wherein the first laser projection module is configured to track the location of a football when the football is on a line of scrimmage during play of a football game, and wherein the second laser projection module is configured to track the location of a first down demarcation on the field, said first laser projection module associated with a first elongated member that extends the entire length of a side-line of a field from a first end zone to a second end zone, said elongated member associated with a first pulley positioned above ground and at said first end zone and a second pulley positioned above ground and at the second end zones, and wherein a remote control unit controls movement of the first pulley and the second pulley. |
