Yarn brake and a two-for-one twisting spindle having such a yarn brake

A spindle comprising:

• a yarn brake including
• a generally elongate brake housing having a longitudinal axis;
• a guide conduit extending generally co-axially within the brake housing and having an open end opening to the exterior at one axial end of the brake housing;
• a brake cartridge having opposed ends each of which has a curved shape, the brake cartridge having a first tube section, a second tube section, and a third tube section being disposed axially intermediate the first tube section and the second tube section, and the first tube section, the third tube section, and the second tube section all arranged in resiliently biased telescoping manner within one another such that the second tube section is resiliently biased in one axial direction outwardly from the third tube section and the first tube section is resiliently biased outwardly from the third tube section in an opposite axial direction opposite to the one axial direction;
• a first brake ring disposed within the brake housing, the first brake ring being resiliently biased in the one axial direction;
• a second brake ring disposed within the brake housing and being a selected one of a fixed axial distance from the first brake ring and a variable axial distance from the first brake ring and being resiliently biased in the opposite axial direction;
• and
• a third brake ring being supported within the brake housing at a position axially intermediate the first brake ring and the second brake ring for engaging the third tube section of the brake cartridge, the brake cartridge being releasably compressively engaged by the first brake ring pressing against the first tube section of the brake cartridge and the second brake ring pressing against the second tube section of the brake cartridge and third brake ring engaging the third tube section of the brake cartridge.

A two-for-one twisting spindle machine comprising:

• a spindle having a yarn brake including
• a generally elongate brake housing having a longitudinal axis;
• a guide conduit extending generally co-axially within the brake housing and having an open end opening to the exterior at one axial end of the brake housing;
• a brake cartridge having opposed ends each of which has a curved shape, the brake cartridge having a first tube section, a second tube section, and a third tube section being disposed axially intermediate the first tube section and the second tube section, and the first tube section, the third tube section, and the second tube section all arranged in resiliently biased telescoping manner within one another such that the second tube section is resiliently biased in one axial direction outwardly from the third tube section and the first tube section is resiliently biased outwardly from the third tube section in an opposite axial direction opposite to the one axial direction;
• a first brake ring disposed within the brake housing, the first brake ring being resiliently biased in the one axial direction;
• a second brake ring disposed within the brake housing and being a selected one of a fixed axial distance from the first brake ring and a variable axial distance from the first brake ring and being resiliently biased in the opposite axial direction;
• and
• a third brake ring being supported within the brake housing at a position axially intermediate the first brake ring and the second brake ring for engaging the third tube section of the brake cartridge, the brake cartridge being releasably compressively engaged by the first brake ring pressing against the first tube section of the brake cartridge and the second brake ring pressing against the second tube section of the brake cartridge and the third brake ring engaging the third tube section of the brake cartridge.