Electronic apparatus for detecting and eliminating iregularities in threads

Claim 1

A CIRCUIT ARRANGEMENT FOR DETECTING VARIATIONS FROM A SELECTED THICKNESS IN AN ELONGATED MEMBER COMPRISING, IN COMBINATION, A VOLTAGE DIVIDER CIRCUIT INCLUDING A VARIABLE CAPACITOR HAVING A PAIR OF PLATES IN SPACED RELATION TO EACH OTHER AND ADAPTED TO PRODUCE A VARIABLE CAPACITY OF SAID CAPACITOR AND A VARIABLE VOLTAGE ACROSS SAID CAPACITOR IN ACCORDANACE WITH A VARIATION OF THE DISTANCE BETWEEN THE PLATES THEREOF; MEANS FOR APPLYING AN ALTERNATING VOLTAGE ACROSS SAID CAPACITOR; MEANS FOR GUIDING SAID ELONGATED MEMBER BETWEEN THE PLATES OF SAID CAPACITOR IN A MANNER WHEREBY THE PLATES OF SAID CAPACITOR ARE SPACED FROM EACH OTHER A DISTANCE EQUAL TO THE THICKNESS OF SAID ELONGATED MEMBER, THE PLATES OF SAID CAPACITORL BEING ADJUSTED SO THAT WHEN THE THICKNESS OF SAID ELONGATED MEMBER IS EQUAL TO SAID SELECTED THICKNESS SAID CAPACITOR PRODUCES AN ALTERNATING VOLTAGE OF SUBSTANTIALLY CONTINUOUS PEAK MAGNITUDE ACROSS ITS PLATES AND WHEN THE THICKNESS OF SAID ELONGATED MEMBER IS GREATER THAN SAID SELECTED THICKNESS SAID CAPACITOR PRODUCES A TRANSIENT VOLTAGE OF A MAGNITUDE GREATER THAN SAID CONTINUOUS PEAK MAGNITUDE ACROSS ITS PLATES; A DIFFERENTIATOR CIRCUIT HAVING AN INPUT AND AN OUTPUT, SAID DIFFERENTIATOR CIRCUIT BEING ADAPTED TO REMAIN QUIESCENT WHEN ENERGIZED BY A VOLTAGE OF SUBSTANTIALLY CONTINUOUS PEAK MAGNITUDE AND TO PRODUCE A CONTROL PULSE WHEN ENERGIZED BY A TRANSIENT VOLTAGE OF A MAGNITUDE GREATER THAN SAID CONTINOUS PEAK MAGNITUDE; RECTIFER MEANS COUPLING THE INPUT OF SAID DIFFERENTIATOR CIRCUIT ACROSS SAID CAPACITOR FOR DETECTING THE PEAKS OF ONE POLARITY OF THE ALTERNATING VOLTAGE PRODUCED BY SAID CAPACITOR; AND OPERATING MEANS COUPLED TO THE OUTPUT OF SAID DIFFERENTIATOR CIRCUIT FOR PERFORMING A PREDETERMINED OPERATION WHEN ENERGIZED BY SAID CONTROL PULSE.