OBJECT TOUCHDOWN AND NET CONTACT DETECTION SYSTEMS AND

摘要

Systems for automatically determining whether a conductive, volant game device touches down in bounds or out of bounds on a playing surface. The system includes boundary line and out of bounds circuits which can be completed by the touchdown of the game device thereupon. A control unit processes the signal generated by each completed circuit and turns on a signal which is coded to indicate whether the device touched down in bounds or out of bounds. Associated circuits and control capabilities provide a signal when the game device touches the top of a net or other barrier in games in which that type of contact is significant.