OCR: LEIT Legerd: Copper plate on chair top to transmt 70 kHz carrier signal Four illuminated antennas to sense hand positions Two antennas to detect left and right feet TWo pushbuttons for generating sensor -independent triggers Digtal display for rcomputer to cue performer Four lights under chai platfom, nominally controlled by foot sensors Lecenc bansmt tfeet computer omiralt contoled
