Precision movement measuring apparatus using standing waves

Claim 1

A MEASURING GAUGE FOR MEASURING OBJECT DISPLACEMENT BETWEEN A REFERENCE POSITION AND A POSITION TO BE MEASURED COMPRISING GENERATING MEANS FOR GENERATING A VARIABLE HIGH FREQUENCY ELECTROMAGNETIC SIGNAL, CONDUCTOR MEANS FOR RECEIVING SAID HIGH FREQUENCY ELECTROMAGNETIC SIGNAL AT ONE END THEREOF, MEANS FOR TERMINATING THE OTHER END OF SAID CONDUCTOR MEANS TO PRODUCE AN ELECTROMAGNETIC STANDING WAVE THEREIN, PROBE MEANS, MEANS FOR PROVIDING MOVEMENT OF SAID PROBE MEANS ALONG SAID CONDUCTOR MEANS IN RESPONSE TO THE OBJECT DISPLACEMENT BETWEEN A REFERENCE POSITION AND A POSITION TO BE MEASURED, SAID PROBE MEANS BEING SENSITIVE TO THE AMPLITUDE OF SAID ELECTROMAGNETIC STANDING WAVE, NULL INDICATING MEANS BEING CONNECTED TO SAID PROBE MEANS TO INDICATE A NULL OF THE STANDING WAVE WHEN THE FREQUENCY OF THE VARIABLE FREQUENCY GENERATING MEANS HAS BEEN PROPERLY ADJUSTED, MEANS FOR INDICATING THE CHANGE IN FREQUENCY OF THE STANDING WAVE WHICH OCCURS DURING THE ADJUSTMENT OF THE VARIABLE FREQUENCY GENERATING MEANS THEREBY INDICATING THE POSITION OF THE PROBE MEANS ALONG SAID CONDUCTOR MEANS.