Out-of-bounds monitor for court games

Details Out-of-bounds monitor for court games Out-of-bounds monitor for court games

G - Physics

01

N

340/124.4

G01N 21/84 (2006.01) A63B 71/02 (2006.01)

Patent

CA 2038898

ABSTRACT OF THE DISCLOSURE An apparatus for monitoring a designated surface area of a playing court comprises a plurality of transmitters for producing electromagnetic pulses alongparallel paths in a plane paralleling the area and in close proximity thereto, the paths extending between opposite ends of the area and being transversely spaced apart by a distance which is less than or equal to the diameter of a playing ball used in the court, the transmitters being disposed along one of the ends of the plane, a plurality of receivers, one associated with each transmitter to form a transmitter-receiver pair, disposed at the opposite end of the plane from its associated transmitter and along the path of the pulse produced by its associated transmitter and being operable to produce an output signal upon detecting a pulse emitted by its associated transmitter, a control mechanism for energizing each transmitter-receiver pair in predetermined timed sequence while maintaining all other transmitter-receiver pairs in an inactive state whereby only the pulse produced by the associated transmitter is present when a receiver is active, anda circuit responsive to the absence of output signal from one of the receivers at a predetermined time for producing an alarm activating signal.

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