Single shaft complex disc type rotary thread take-up device

Claim 2

A SEWING THREAD TAKE-UP DEVICE OF THE SINGLE SHAFT COMPLEX DISC TYPE IN A SEWING MACHINE OF THE TYPE IN WHICH A ROTARY HOOK MAKES TWO REVOLUTIONS DURING A SEWING CYCLE, COMPRISING THREE DISCS CONCENTRICALLY MOUNTED ON THE MAIN SHAFT OF THE MACHINE, TWO PAIRS OF AT LEAST TWO PIN-SHAPED THREAD CONTACT MEMBERS, ONE OF SAID TWO PAIRS BEING FIXED BETWEEN TWO OF SAID THREE DISCS, AND THE OTHER OF SAID TWO PAIRS BEING FIXED BETWEEN ANOTHER TWO OF SAID DISCS, AND THREE GUIDES SET IN ADJACENT THE EDGE OF SAID DISCS, EACH GUIDE BEING AT A DIFFERENT DISTANCE FROM THE CENTER OF SAID DISCS, AND ONE PIN SHAPED CONTACT MEMBER OF EACH PAIR BEING ON THE SAME RADIUS AS ONE PIN SHAPED CONTACT MEMBER OF THE OTHER PAIR, A SEWING THREAD ADAPTED TO BE SO ARRANGED THAT IT IS THROWN CONTRARY TO A DIRECTION OF RUNNING OF SAID THREAD BY AT LEAST ONE OF SAID PAIRS OF SAID CONTACT MEMBERS WHENEVER SAID THREAD IS RUNNING IN SAID DIRECTION, BY MEANS OF EXTENDING THE THREAD FROM ONE OF SAID THREE GUIDES TO ANOTHER ONE OF SAID THREE GUIDES THROUGH A PATH ARRANGED BETWEEN THE FIRST-NAMED TWO DISCS AND SUBSEQUENTLY FROM SAID SECONDNAMED GUIDE TO THE THIRD GUIDE THROUGH ANOTHER PATH ARRANGED BETWEEN THE SECOND-NAMED TWO DISCS SO THAT THE EXTENDING DIRECTION IS ALWAYS CONTRARY TO THE DIRECTION OF ROTATION OF SAID DISCS, WHEREBY THE SEWING THREAD IS ADAPTED TO BE DRAWN TOWARDS SAID FIRST-NAMED GUIDE CONTINUOUSLY, SAID THREAD CONTACT MEMBERS BEING ARRANGED CONDITIONAL ON: