Apparatus for tensioning yarn

Claim 1

APPARATUS FOR TENSIONING YARN COMPRISING: A FIRST MEMBER, A SECOND MEMBER, EACH OF SAID MEMBERS HAVING A YARN INPUT AND A YARN OUTPUT END AND A PLURALITY OF YARN ENGAGING FINGERS THEREBETWEEN, SAID FINGERS OF SAID FIRST AND SAID SECOND MEMBERS BEING ALTERNATELY SPACED WITH RESPECT TO EACH OTHER TO THEREBY INTERMESH AND APPLY TENSION TO AN ADVANCING STRAND OF YARN, PIVOT MEANS CONNECTING SAID SECOND MEMBER WITH SAID FIRST MEMBER AT THE INPUT ENDS THEREOF TO AFFORD PIVOTAL MOVEMENT OF SAID SECOND MEMBER RELATIVE TO SAID FIRST MEMBER, A LEVER HAVING AN INNER END PIVOTALLY SUPPORTED INTERMEDIATE THE ENDS OF SAID SECOND MEMBER AND HAVING AN OUTER END WHICH EXTENDS BEYOND THE OUTPUT END OF SAID SECOND MEMBER, A PIN POSITIONED ON SAID LEVER ARRANGED TO ENGAGE SAID SECOND MEMBER INTERMEDIATE THE INNER END OF SAID LEVER AND THE OUTPUT END OF SAID SECOND MEMBER TO PIVOT SAID LEVER IN RESPONSE TO MOVEMENT OF SAID SECOND MEMBER, THE OUTER END OF SAID LEVER BEING MOVABLE IN A PATH PROPORTIONATELY GREATER THAN THAT OF SAID SECOND MEMBER WHEN PIVOTED BY SAID SECOND MEMBER, AND A RESILIENT ELEMENT CONNECTED AT THE OUTER END OF SAID LEVER AND ARRANGED TO EXERT A FORCE TO BIAS SAID PIN AGAINST SAID SECOND MEMBER TO URGE THE FINGERS OF SAID SECOND MEMBER INTO MESH WITH THE FINGERS OF SAID FIRST MEMBER, SAID RESILIENT ELEMENT ACTING THROUGH AN EFFECTIVE MOMENT ARM TO INCREASE THE BIASING FORCE AS SAID FINGERS OF SAID FIRST AND SECOND MEMBERS MESH TO AN INCREASING DEGREE, AND TO DECREASE THE BIASING FORCE AS SAID EMMESHING DECREASES, THE LENGTH OF SAID MOMENT ARM BEING CONTROLLED BY MOVEMENT OF SAID LAVER.