Method and apparatus for the simultaneous centralized control of the yarn brakes of twist spindles of a two-for-one twisting machine

An apparatus for simultaneously commonly adjusting the braking force of a plurality of capsule-like yarn brakes each disposed in a respective twist spindle of a two-for-one twisting machine, each twist spindle having a yarn brake supported by two axially spaced brake rings in the hollow shaft of the twist spindle, the one brake ring being rotatable in response to axial pressure thereon whereby the rotation of the brake ring effects a discrete axial movement of the brake ring into a new axial position at which the brake ring remains once the axial pressure thereon ceases, each twist spindle having a yarn intake conduit forming a portion of its hollow shaft, and the two-for-one twisting machine having a plurality of yarn balloon guides each associated with a respective twist spindle for guiding the formation of a yarn balloon relative thereto, the apparatus comprising:

• means for mounting to the yarn intake conduit of each respective twist spindle the respective brake ring of the twist spindle, the brake ring being that brake ring whose rotation is translated into axial displacement of the brake ring;
• and
• a support frame movably mounted on the two-for-one twisting machine for movement upwardly and downwardly generally parallel to the axes of the twist spindles, the plurality of yarn balloon guides being mounted to the support frame such that each of the yarn balloon guides exerts, simultaneously with the other yarn balloon guides, a downward pressure on the yarn intake conduit of the respective associated twist spindle, whereupon simultaneous downward axial pressure is thereby applied to the brake rings mounted to the yarn intake conduits of the twist spindles in a manner which causes the one brake rings thereof to rotate and undergo the associated axial displacement.