Thermo-electric detecting device

Claim 1

APPARATUS FOR DETERMINING THE DIRECTION OF A SOURCE OF INFRAD-RED RADIATION COMPRISING A REFLECTOR ARRANGED TO CONCENTRATE THE RECEIVED RADIATION, A PLURALITY OF DETECTOR UNITS MOUNTED ONE ABOVE THE OTHER IN THE TOTAL PLANE OF SAID REFLECTOR, AN OSCILLOSCOPE, MEANS FOR SCANNING SAID REFLECTOR HORIZONTALLY, MEANS SYNCHORNIZED WITH OPERATION OF SAID REFLECTOR SCANNING MEANS FOR APPLYING A LINEAR SWEEP VOLTAGE TO THE HORIZONTAL BEAN DEFLECTION MEANS ON SAID OSCILLOSCOPE, MEANS FOR APPLYING A LINEAR VOLTAGE TO THE VERTICAL DEFLECTION MEANS ON SAID OSCILLOSCOPE WHEREBY A PLURALITY OF PARALLEL HORIZONTAL LINES WILL BE TRACED SIMULTANEOUSLY ACROSS THE SCREEN OF SAID OSCILLOSCOPE, SWITCHING MEANS FOR ELECTRICALLY SCANNING THE OUTPUTS OF SAID DETECTOR UNITS, AND MEANS CONNECTING SAID SWITCHING MEANS IN CIRCUIT RELATION WITH THE BRIGHTENING GRID OF SAID OSCILLOSCOPE WHEREBY TARGET INDICATION WILL BE PORTRAYED TO THE OPERATOR BY A CHANGE IN INTENSITY OF THE BEAM TRACES APPEARING ON THE SCREEN.