Phase measuring devices

Claim 1

A DEVICE FOR DETERMINING THE RELATIVE PHASE BETWEEN A PLURALITY OF SIGNAL SOURCES HAVING THE SAME FREQUENCY COMPRISING A SIGNAL TRANSLATION CHANNEL CONNECTED TO EACH OF SAID SOURCES, EACH OF SAID CHANNELS COMPRISING A MIXER, A LOCAL OSCILLATOR FEEDING A MODULATING SIGNAL TO EACH OF SAID MIXERS, AND MEANS FOR COMPARING THE RELATIVE PHASE OF THE OUTPUT WAVES OF SAID CHANNELS COMPRISING A TUNED AMPLIFIER CONNECTED TO THE OUTPUT OF EACH OF SAID MIXERS, EACH OF SAID TUNED AMPLIFIERS BEING TUNED TO THE SAME SIDEBAND OF THE MODULATED SIGNAL OUTPUT OF SAID MIXERS, A SWEEP GENERATOR SYNCHRONIZED TO THE OUTPUT OF A FIRST OF SAID CHANNELS, A CATHODE RAY INDICATOR HAVING MEANS FOR DEFLECTING THE BEAM OF SAID INDICATOR ALONG ONE AXIS OF THE SCREEN OF SAID INDICATOR, SAID DEFLECTING MEANS BEING FED BY SAID SWEEP GENERATOR TO PRODUCE LINEAR DEFLECTION OF SAID BEAM ALONG SAID AXIS, AND THE OUTPUT OF A SECOND OF SAID CHANNELS BEING FED THROUGH A LIMITER AND A DIFFERENTIATOR TO OTHER MEANS IN SAID CATHODE RAY INDICATOR FOR MODULATING SAID BEAM.