Weft thread control device

Claim 1

IN A LOOM INCLUDING HEDDLE MEAANS FOR FORMING WARP SHEDS, AND A RECIPROCATING SLAY HAVING REED MEANS FOR BEATING DURING A FORWARD STROKE A WEFT THREAD INSERTED INTO A WARP SHED, IN COMBINATION, A WEFT THREAD STOP MOTION COMPRISING, IN COMBINATION, CARRIER MEANS MOUNTED ON THE LOOM AND BEING OPERATED BY SAID SLAY TO RECIPROCATE BETWEEN FIRST AND SECOND POSITIONS; AND CONTACT MEANS FOR CONTROLLING A CIRCUIT INCLUDING MEANS FOR STOPPING THE LOOM, SAID CONTACT MEANS INCLUDING A STATIONARY FIRST CONTACT MEMBER, A SECOND CONTACT MEMBER MOUNTED ON SAID CARRIER MEANS FOR MOVEMENT RELATIVE TO THE SAME BETWEEN AN OPERATIVE POSITION FOR ENGAGING SAID FIRST CONTACT MEMBER IN SAID FIRST POSITION OF SAID CARRIER MEANS AND AN INOPERATIVE POSITION SPACED FROM SAID FIRST CONTACT MEMBER IN SAID FIRST POSITION OF SAID CARRIER MENAS, SAID SECOND CONTACT MEMBER BEING SPACED FROM SAID FIRST CONTACT MEMBER IN SAID SECOND POSITION OF SAID CARRIER MEANS, AND MEANS URGING SAID SECOND CONTACT MEMBER INTO SADI OPERATIVE POSITION, SAID SECOND CONTACT MEMBER LOCATED PARTLY IN THE PATH OF MOVEMENT OF A PROPERLY INSERTED WEFT THREAD BEATEN BY SAID REED MEANS DURING THE FORWARD STROKE OF SAID SLAY SO AS TO BE ENGAGED AND MOVED BY A PROPERLY INSERTED WEFT THREAD FROM SAID OPERATIVE INTO SAID INOPERATIVE POSITION THEREOF WHILE SAID SECOND CONTACT MEMBER REMAINS IN SAID OPERATIVE POSITION IF THE WEFT THREAD IS NOT PROPERLY INSERTED SO THAT SURING MOVEMENT OF SAID CARRIER MEANS FROM SAID SECOND TO SAID FIRST POSITION THEREOF SAID SECOND CONTACT MEMBER IN SAID OPERATIVE POSITION THEREOF WILL ENGAGE SAID FIRST CONTACT MEMBER AND THUS STOP SAID LOOM.