Patent GB-540665-A (GB)
Title: Sliver-balling or roll forming apparatus
IPC: D01G15/62
Filed: 1940-10-12
Abstract: 540,665. Sliver-balling or roll-forming apparatus. FAIRBAIRN LAWSON COMBE BARBOUR, Ltd., and BEE, J. R. Oct. 12, 1940, No. 15200. [Class 120 (i)] In a sliver-balling or roll-forming apparatus in which the roll is wound on a toothed arbor which, and subsequently the roll being wound, is engaged by a toothed pressure roller carried by a lever controlled by a brake device, the pressure wheel is caused to exert an additional pressure on the roll shortly after the commencement of the formation thereof and to continue to do so as the roll increases in diameter and until its full size is attained. As shown the pressure roller C is rotatably mounted in a double lever D fixed to a shaft E and to a pair of brake drums F and is driven by a wheel e freely mounted on the shaft; each brake band G embracing a drum F is connected at one end to an adjustable screw g and at the other to the short arm of a pivoted lever g<SP>4</SP> actuated by a cam g<SP>6</SP> on the intermittently rotated shaft X. A pair of chains H attached to the lever D are fixed to wheels h rotatable on a shaft h<SP>2</SP> and connected to a wheel h<SP>4</SP> carrying a chain h<SP>5</SP> which is also fixed to a scroll h<SP>6</SP> on a box; J containing a coiled spring and rotatable on a shaft carried in a two-armed bracket L fixed to a rotatable shaft N; the spring in the box J has one end fixed thereto and the other to a boss fixed to the shaft K which also carried a plate j<SP>2</SP> having slots engaging bolts j<SP>4</SP> in one arm of the bracket L so that by adjusting the plate j<SP>6</SP> against the bracket arm the tension of the spring may be adjusted The bracket arm is adjustably connected to a link O, pivoted by a stud o carrying a roller o' to a link O<SP>1</SP> pivoted to a fixed bracket L<SP>3</SP>, the roller o<SP>1</SP> engaging a snail cam P on the shaft X and in the normal position holding the links slightly out of line. At the commencement of a roll forming operation the chains H, h<SP>5</SP> are untensioned with the links O, 01 supported by the cam P but when the pressure wheel has moved a predetermined distance from the toothed roll centres B, the chains become taut and exert a pressure additional to that caused'by the brake bands G by reason of the cam P and links O, O<SP>1</SP> preventing the bracket L from rising and causing the spring box J to be slowly rotated against the resistance of the spring. The consequent rotation of the scroll h<SP>6</SP> pulls down the chain h<SP>5</SP> and increases the pressure of the wheel C gradually until the roll is of full diameter when a release motion causes rotation of the shaft X, the cam P then leaving the roller O<SP>1</SP> and allowing the links O, O<SP>1</SP> to collapse, the bracket L then rises and relieves the tension on the chains and the additional pressure on the roll while other cams on the shaft X retract the toothed centres B and allow the completed roll to fall away, the centres being subsequently closed and the lever D forced forward by the cam P through a connecting rod p pivoted to an arm p<SP>3</SP> pivoted to the lever and engaging a laminated spring p<SP>5</SP> thereon. The brake bands G are then brought into action by the cam g<SP>6</SP> while the cam P engages the roller o<SP>1</SP> and forces the lever o, o<SP>1</SP> to their normal position; the movement of the bracket L is limited by screws Q, R which are adjusted so that the additional pressure exerted by the chains H, h<SP>5</SP> on the pressure wheel is instantly removed immediately the cam P starts to rotate and a spring S assists the return of the links O, O<SP>1</SP> to their normal position.