Patent GB-536760-A (GB)
Title: Improvements in spinning machines for the production of yarns or threads
IPC: D01H13/18
Filed: 1940-07-27
Abstract: 536,760. Drawing fibres. FAIRBAIRN LAWSON COMBE BARBOUR, Ltd., and BEE, J. R. July 27, 1940, No. 22484/39. [Class 120 (ii)] A spinning frame comprises a succession of top slip draft rollers and a top feed roller mounted on a partly balanced pivoted support, which normally assumes a position in which the rollers bear on the fibre as it passes between them and a co-operating portion of the slip draft device and the bottom feed roller, and a weighted separating lever which is normally kept in an inoperative position by a detector lever but which, on breakage of the yarn, is released by the detector lever and turns the partly balanced pivoted support so that the top slip draft rollers are separated from the co-operating portion of the slip draft device and the top feed roller from the bottom feed roller; the co-operating portion of the slip draft device may comprise an endless conveyer belt carried by pulleys and driven independently of the feed rollers. The top slip draft rollers C, C<SP>1</SP>, C<SP>2</SP> are shown carried in slotted bearings adjustably fixed to a pair of rods E fixed in arms e of a casting El pivoted on a shaft F running along the frame ; the endless leather belt D forming the other portion of the slip draft device is carried by pulleys d, d<SP>1</SP> and is tensioned by a pulley d<SP>3</SP> carried by an arm d<SP>4</SP> fixed to an adjustable shaft running the length of the machine. The top feed roller B is carried in bearings on the arms e and the arms &c. are partly balanced by a weight H adjustably carried by an arm h on a casting h<SP>1</SP> freely mounted on the shaft F and formed with an arm h<SP>2</SP> which normally engages a stud e<SP>3</SP> projecting from an arm e' on the casting E<SP>1</SP>; the arm h<SP>2</SP> is formed with a gripping surface h<SP>3</SP> which grips the sliver against.a plate J when the stop motion is actuated. The yarn O passes over a runner n on the detector lever N<SP>1</SP> pivoted on a stud N and caused to bear against the yarn by an adjustable weight n<SP>1</SP> and the lever N<SP>1</SP> has a short arm N<SP>2</SP> formed with a recess n<SP>3</SP> normally engaging a runner m<SP>2</SP> on the weighted separating lever M pivoted on a stud m and having a grooved or slotted projecting arm m<SP>3</SP> engaging a stud m<SP>5</SP> on an adjustable bracket m<SP>7</SP> attached to or forming part of one of the bearings of the front roller C. Should the yarn break the arm N<SP>2</SP> of the lever N<SP>1</SP> is' disengaged from the runner m<SP>2</SP> and the weighted lever M swings forward to raise the rods E and separate the rollers C, C<SP>1</SP>, C<SP>2</SP> from the belt D and the upper feed roller B from the lower feed roller Bi. At the same time a weighted arm l on a tumbler lever L pivoted on a pin K and carrying an abutment l<SP>3</SP> engaging a stud e<SP>5</SP> projecting from an arm e<SP>6</SP> on the casting El, tilts backwards and causes the lever L to move the arm e<SP>6</SP> and impart a further turning movement to the casting E<SP>1</SP> so that the stud e<SP>3</SP> is removed from the arm h<SP>2</SP> and the gripping surface h<SP>3</SP> is forced by the weight H against the plate J to clamp the sliver. The back roller B is pressed against the roller B<SP>1</SP> by the weighted arm l which has an abutment l<SP>2</SP> engaging an adjustable stop b<SP>7</SP> on an arm b<SP>4</SP> freely mounted on the pin K and carrying adjustable screws b<SP>2</SP> on which are fixed the saddles b fitting over the journals of the roller B.