Printed circuit delay line

Claim 1

AN ELECTRICALLY CONTROLLED HIGH SPEED VARIABLE TRANSMISSION LINE COMPRISING: A DIELECTRIC BOARD; A PLURALITY OF SPACED CONDUCTOR STRIPS ON ONE FACE OF SAID BOARD, EACH STRIP DEFINING AN INDUCTIVE DEVICE; A SERIES OF SPACED CONDUCTIVE PLATES ON THE OPPOSITE FACE OF SAID BOARD; A PLURALITY OF CONDUCTORS EXTENDING THROUGH SAID BOARD AND ELECTRICALLY CONNECTING ONE END OF EACH STRIP TO ONE OF SAID PLATES AND THE OTHER END OF THE STRIP TO AN ADJACENT PLATE TO DEFINE A FIRST CONDUCTIVE PATH OF ALTERNATING STRIPS AND PLATES; A FLEXIBLE METAL DIAPHRAGM MOUNTED ON SAID OPPOSITE FACE IN OPPOSED AND OUTWARDLY SPACED BRIDGING RELATION TO SAID SERIES OF PLATES BUT ADJACENT THERETO, SAID DIAPHRAGM DEFINING A SECOND CONDUCTIVE PATH CAPACITATIVELY RELATED TO SAID SERIES OF PLATES AND HAVING ITS ENDS FIXED TO SAID BOARD; MEANS FOR SELECTIVELY FLEXING SAID DIAPHRAGM TO VARY THE SPACING OF ITS MIDPORTION FROM SAID PLATES AND THEREBY VARY THE CAPACITANCE BETWEEN SAID SECOND CONDUCTIVE PATH AND SAID PLATES IN ACCORDANCE WITH THE FLEXING THEREOF.