Device for controlling length of weft yarn on fluid jet shuttleless loom

Claim 1

IN A FLUID JET SHUTTLELESS LOOM HAVING MEANS FOR DRAWING-OUT A YARN AT A PREDETERMINED SPEED AND IN A DRAWING OUT DIRECTION FROM A YARN SUPPLY, AND MEANS FOR PROJECTING THE YARN BY THE ACTION OF A FLUID JET, A DEVICE FOR HOLDING A LENGTH OF THE YARN TO BE PROJECTED INCLUDING MEANS ADAPTED TO BE POSITIONED IMMEDIATELY PRECEDING SAID PROJECTING MEANS FOR GRASPING THE DRAWN-OUT YARN, AN AIRSTREAM CONFINING MEANS IMMEDIATELY PRECEDING SAID GRASPING MEANS AND EXTENDING IN SAID DRAWING OUT DIRECTION AND HAVING ONE END ADJACENT THE DRAWING OUT MEANS, MEANS FOR GENERATING A STREAM OF AIR IN SAID DRAWING OUT DIRECTION AND ATTACHED TO THE OTHER END OF SAID AIRSTREAM CONFINING MEANS, SAID AIRSTREAM CONFINING MEANS DETAINING THE YARN IN A FOLDED STATE BY FLOATING THE SAME IN SAID STREAM OF AIR WHILE THE YARN IS GRASPED BY SAID GRASPING MEANS, AND MEANS COUPLED TO SAID GRASPING MEANS FOR RELEASING SAID GRASPING MEANS AT PREDETERMINED TIMES TO PERMIT THE DETAINED YARN TO ADVANCE THROUGH SAID PROJECTING MEANS, WHILE IT STRETCHES, BY THE ACTION OF SAID FLUID JET.