DE2163140

• Main Authors: ANDERSON, GORDON C, HARMON, ALBERT D
• Format: Patent
• Language: English
• Published: 18.09.1975
• Edition: 2
• Subjects: NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; SPINNING OR TWISTING; TEXTILES

The disclosed servicing assembly, which preferably includes yarn-positioning and traveler-threading mechanisms, is operable adjacent a ring rail of the spinning machine being serviced by the piecing apparatus. The servicing assembly is mounted by a compound bracket upon an upright splined shaft, which shaft is rotatably mounted upon the mobile carriage of the piecing apparatus and operatively connected to a control cam mechanism of the apparatus, for cable-controlled vertical movement of the assembly longitudinally of the shaft and horizontal movement thereof in response to shaft rotation. A spring biased latch normally maintains the assembly in an elevated position above the maximum elevation of the ring rail of the spinning machine serviced by the apparatus. Release of the latch permits gravity descent of the assembly from its elevated position, whereupon a support member connected thereto is biased from a retracted position to an extended position wherein it overlays and engages the ring rail and thereby supports the assembly for vertical movement in unison therewith. Rotation of the splined shaft about its axis effects desired movement of the entire assembly horizontally toward and away from the spinning machine, and produces desired relative movement between a yarn depressor and other servicing components of the assembly. The yarn depressor preferably is provided with a cam surface engageable with the ring rail to insure its precise positioning relative thereto. Return upward movement of the assembly to its elevated position, which return movement is realized by a cable system having desirable "fail-safe" features, automatically effects re-engagement of the latch and movement of the support member to its retracted position.