Patent GB-401853-A (GB)
Title: Improvements in sliver balling machines
IPC: D01G27/04
Filed: 1932-09-20
Abstract: 401,853. Sliver-balling apparatus. FRASER, G., FRASER, N., and FRASER, J., Westburn Foundry, Arbroath, Angus. Sept. 20, 1932, No. 26109. [Class 120 (i).] A sliver ball or roll forming machine comprises arms 1 between which the balls or rolls are wound and which swing upwardly during roll formation and fall on ejection of the completed roll, and loading means constituted by a friction brake 6, 7 which is automatically eased or released when the roll or ball is completed and is held released during the fall of the arms until they have almost reached their lowermost position when further downward movement is checked by the brake. The arms 1 are carried on the shaft 2 by a sleeve 3 to which the brake drum 6 is secured. The brake band 7 is anchored to the machine frame at 8 and is secured to a bolt 12 slidable in a swivel block 13 carried by the short arm 9 of the brake lever 9, 10. A compression spring 14 is interposed between the block 13 and a nut 15 adjustable on the bolt 12 while a tension spring 16 urges the lower end of the arm 10 in a direction to release the brake, a cam 17 being secured on the shaft 5 which carries the driving roller 4 and engaging an adjustable follower 18 on the arm 10. A stud 19 adjustable on the arm 10 is engaged by the hook end 19<1> of a latch lever 20 to hold the brake in the " on " position, the other end of the lever 20 being formed as a step 22 engageable by a catch 23 on the arm 24 of a bell-crank lever 24, 25 pivoted at 26, to hold the hook 19<1> clear of the stud 19. Two arms 27, 31 unitary with the sleeve 3 are connected respectively to the members 25, 20 by links 28, 32 provided with lost-motion devices 29, 30 ; 33, 34. During the winding of the ball or roll the brake lever 9, 10 is held in the " on position by the latch hook 19<1> engaging the stud 19. When the arbors reach the point A the block 33 lifts the link 32 and at the point B raises the hook 19<1> to release the brake, the catch 23 engaging the step 22 and holding the lever 20 inoperative. After ejection of the sliver roll the arms 1 descend. When the arbors reach the point C the block 29 lifts the link 28 and at the point D the catch 23 releases the lever 20 and the hook 19<1> drops into position to re-engage the stud 19 when the lever 9, 10 is moved back by the cam 17. The latter acts so that the brake is released as the arms 1 begin to separate to permit ejection of the roll, the arms being separated for half a revolution of the roller 4 and the descent to the position E occupying the other half revolution, the arms falling more or less freely until checked by the re-imposition of the brake towards the end of their descent. Pedal-operated means 36, 38, 39, 40 is provided to enable the operative to release the brake when desired. The machine is automatic in ejecting the completed roll and in starting the formation of another. The Provisional Specification describes also the provision of small friction pulleys on the half arbor units which are driven by a large friction pulley to provide the requisite speed at starting. Specifications 323,416, [Class 120 (i), Spinning, Preparation &c. for], and 377,590 are referred to.