Method of and apparatus for controlling bobbin change in double-twist machines

Claim 1

A DOUBLE TWIST MACHINE HAVING: MEANS DEFINING AT LEAST ONE PREPARATION STATION, MEANS DEFINING AT LEAST ONE STANDBY STATION, MEANS DEFINING AT LEAST ONE INSERTION STATION AND MEANS DEFINING AT LEAST ONE DOUBLING STATION AT WHICH YARN IS WOUND FROM A CREEL BOBBIN ONTO DOUBLER BOBBIN MEANS ALL OF SAID ONE STATIONS BEING GENERALLY DISPOSED IN A COMMON PLANE; MEANS FOR SENSING AN INTERRUPTION IN THE PASSAGE OF YARN FROM THE CREEL BOBBIN TO THE DOUBLER BOBBIN AT SAID DOUBLING STATION; A CHANGER APPARATUS DISPOSED AT SAID INSERTION STATION AT LEAST UPON THE SENSATION BY SAID SENSING MEANS OF A YARN INTERRUPTION AND COMPRISING: (A) MEANS FOR WITHDRAWING AN ASSOCIATED CREEL BOBBIN AND DOUBLER BOBBIN MEANS HAVING YARN OPERATIVELY THREADED THEREBETWEEN FROM SAID STAND-BY STATION; (B) MEANS FOR DISENGAGING FROM THE DOUBLING STATION THE CREEL BOBBIN AND DOUBLER BOBBIN MEANS BETWEEN WHICH YARN PASSAGE HAS BEEN INTERRUPTED; (C) MEANS FOR DEPOSITING THE DISENGAGED CREEL BOBBIN AND DOUBLER BOBBIN MEANS AT THE PREPARATION STATION; AND (D) MEANS FOR INSTALLING THE ASSOCIATED CREEL BOBBIN AND DOUBLER BOBBIN MEANS WITHDRAWN FROM THE STAND-BY STATION AT THE DOUBLING STATION.