Delay line

Claim 1

IN AN ELECTRICAL DELAY LINE HAVING A COILED CONDUCTOR FORMING A SERIES INDUCTANCE AND HAVING DISTRIBUTED SHUT CAPACITANCE, IN COMBINATION, A CONTINUOUS HELICAL COIL MEANS OF CONDUCTIVE MATERIAL HAVING A LONGITUDINAL AXIS AND CONSTITUTING A PART OF THE COILED CONDUCTOR; A STRIP-SHAPED SHEET MEMBER OF DIELECTRIC MATERIAL EXTENDING IN DIRECTION OF SAID AXIS AND ADJACENT TO SAID COIL MEANS; AND FIRST AND SECOND METAL FILM ELECTRODES, THE FIRST OF SAID ELECTRODES FORMING ANOTHER PART OF THE COILED CONDUCTOR, AND THE OTHER ONE OF SAID ELECTRODES BEING CONNECTABLE TO GROUND, SAID FIRST METAL FILM ELECTRODE BEING ARRANGED ON ONE FACE OF SAID SHEET MEMBER AND COMPRISING A PLURALITY OF REGULARLY SPACED METAL FILM PORTIONS IN INTIMATE CONTACT WITH SAID ONE FACE OF SAID SHEET MEMBER, DIFFERENT OF SAID REGULARLY SPACED METAL FILM PORTIONS BEING ALSO IN INTIMATE CONTACT AT LEAST WITH PORTIONS OF DIFFERENT TURNS, RESPECTIVELY, OF SAID COIL MEANS, AND SAID SECOND METAL FILM ELECTRODE BEING ARRANGED ON THE OTHER FACE OF SAID SHEET MEMBER AND COMPRISING AT LEAST ONE CONTINUOUS METAL FILM STRIP IN INTIMATE CONTACT WITH SAID OTHER FACE OF SAID SHEET MEMBER AND AT LEAST PARTLY CONFRONTING SAID METAL FILM PORTIONS OF SAID FIRST METAL FILM ELECTRODE ON SAID FIRST FACE OF SAID SHEET MEMBER, SO THAT THE SHUNT CAPACITANCE IN SAID SHEET MEMBER IS CONFINED TO THE SHEET PORTIONS LOCATED BETWEEN SAID MUTUALLY CONFRONTING PORTIONS OF SAID FIRST AND SECOND METAL FILM ELECTRODES.