Patent ID: 6597291
Filing Date: 2003-07-22
Classification: E05F,E05Y,G07C

Abstract:
A system for monitoring a panel comprising:a reflective element associated with the panel; a sensor comprised of an infrared emitter, a first infrared receiver and a second infrared receiver, each positioned along said panel, wherein said sensor is to detect a status of the reflective element and the infrared emitter is to provide a sensor signal to at least one of said first and second infrared receivers, and wherein said sensor signal is an infrared signal; a transmitter, connected to said sensor, comprising: a power source, a sensor signal input to receive said sensor signal, a control circuit connected to said power source and said sensor signal input, said control circuit to cause a position signal to be transmitted, said position signal corresponding to said status, and an antenna connected to said control circuit; a remote receiver to receive said position signal and to provide a position indicator corresponding to said status.