Electrical signaling system for tennis court has strips with mutually electrically isolated electrical contacts in edge regions; ball impact in this region makes electrical connection between strips

摘要

The tennis court has division and boundary lines consisting of lengthwise and transverse strips (1,2) let into the ground at the same level as the ground. The strips have at least three mutually electrically isolated, lengthwise electrical contacts in their edge regions, whereby a ball impact in this region makes an electrical connection between at least two strips and the resulting current can be displayed as a signal on or with a display (5).