Abstract: An apparatus for measuring the amount of yarn withdrawn from a warp beam mounted on the frame of the warp beam knitting machine is disclosed. A support arm is mounted on the frame and a lever arm is pivotally mounted on the support arm. A pressure roll is supported on the lever arm and engages the yarn wound on the warp beam. The pressure roll is operatively connected to a signal generator which generates pulses representative of the length of yarn withdrawn from the warp beam. A limit switch is mounted on the support arm and is adapted for electrical connection to the main drive mechanism of the warp knitting machine. The limit switch has open and closed positions adapted for controlling operation of the knitting machine. When the switch is closed the knitting machine is operable.

Abstract: A simplified loom beam let off is illustrated which utilizes a brake disc with opposed brake pads for applying uniform tension to the yarn through the loom beam gear. The pads are urged through yieldable force against the disc and such force may be adjusted manually or automatically through sensors responsive to tension in the warp or responsive to size of the build on the loom beam.