公开(公告)号：DE1268710B

公开(公告)日：1968-05-22

申请号：DE1268710

申请日：1961-01-10

Applicant: COURTAULDS LTD

Inventor： ATKINS ARTHUR AMBROSE ,  BAKER BERNARD STUART ,  JESSOP WILLIAM NEIL

IPC: D01H5/36

公开(公告)号：GB908037A

公开(公告)日：1962-10-10

申请号：GB103860

申请日：1960-01-12

Applicant: COURTAULDS LTD

Inventor： ATKINS ARTHUR AMBROSE ,  BAKER BERNARD STUART ,  JESSOP WILLIAM NEIL

IPC: D01H5/36 ,  G05B19/04

Abstract: A shaft, e.g. driving a cam 36 in a machine for producing artificial textile threads of varying denier (slub yarns), is caused to run at any of five different speeds according to which of five relays is energized, which is effected in random sequence by a two hundred position selector switch 34 driven from a 200:1 reduction worm drive 33. The sequence may be derived from random number tables, and preferably each relay is energized twice during each set of ten changes. The object is to ensure that the variations in denier of the yarn are sufficiently random to prevent "patterning" in material made from the yarn. By inserting various resistors the relay vary a reference voltage which may be used to control either the speed of an electric driving motor 31 in known manner or a slipping clutch driven by a constant speed motor. Each output speed differs by less than 20% from the mean. The apparatus may be used whenever a controlled change of speed is needed, such as for the production of fancy effects or cheese winding traverse drive. Specifications 813,857, 883,304 and 899,313 are referred to.