['129', '(', '183', ')', 'WOOLLEN', 'YARN', 'SPINNING', 'tip', 'of', 'the', 'spindles', 'causes', 'them', 'to', 'contract', ',', 'and', 'that', 'when', 'the', 'carriage', 'is', 'freed', 'from', 'the', 'outward', 'draw', 'it', 'is', 'drawn', 'inwards', 'by', 'this', 'contraction', 'of', 'the', 'threads', ',', 'aided', 'by', 'a', 'conveyed', 'tendency', ',', 'until', 'held', 'by', 'the', 'jack-lever', 'The', 'backing-off', 'indirectly', 'raises', 'this', 'jack-lever', 'and', 'thus', 'frees', 'the', 'carriage', 'for', 'the', 'run-in.', '(', 'e', ')', 'Backing-off', 'must', 'now', 'be', 'accomplished.', 'This', 'is', 'effected', 'by', 'reversing', 'the', 'turning', 'of', 'the', 'rim wheel', 'B', ',', 'which', 'necessarily', 'reverses', 'the', 'turning', 'of', 'the', 'spindles', 'This', 'is', 'effected', 'through', 'the', 'separate', 'drive', '(', 'usually', 'rope', ',', 'to', 'ensure', 'positive', 'action', ')', 'from', 'the', 'main', 'mill shaft', ',', 'through', 'the', 'two-grooved', 'pulley', 'F', '(', 'Fig.', '42', ')', ',', 'which', ',', 'through', 'toothed', 'gearing', ',', 'turns', 'the', 'toothed', 'backing-off', 'wheel', 'c', '(', 'Figs.', '41', 'and', '42', ')', 'in', 'the', 'reverse', 'direction.', 'This', 'wheel', 'c', '(', 'Fig.', '41', ')', 'forms', 'a', 'friction', 'clutch', 'with', 'pulley', '1.', 'The', 'arrival', '“in”', 'of', 'the', 'carriage', 'again', 'giving', 'half', 'a', 'revolution', 'of', 'the', 'cam shaft', 'of', 'the', 'mule', 'withdraws', 'the', 'friction', 'contact', ';', 'the', 'half', 'turn', 'of', 'the', 'cam shaft', 'on', 'the', 'arrival', 'out', 'of', 'the', 'carriage', 'left', 'it', 'free', 'under', 'the', 'control', 'of', 'the', 'twist', 'mechanism', 'already', 'described.', 'Thus', 'on', 'the', 'completion', 'of', 'the', 'twisting', 'with', 'the', 'carriage', 'in', 'the', 'outward', 'position', 'the', 'withholding catch', 'is', 'withdrawn', ',', 'the', 'backing-off', 'wheel', 'by', 'friction', 'engages', 'I', ',', 'and', 'through', 'it', 'and', 'the', 'fast-speed', 'rim', 'B', 'reverses', 'the', 'spindles', 'and', 'thus', 'effects', '"', 'backing-off.', '"', 'The', 'further', '”', 'control', 'of', 'the', 'motions', 'must', 'now', 'pass', 'to', 'the', 'mule carriage', '(', ')', 'As', 'backing-off', 'takes', 'place', 'the', 'faller-wires', 'must', 'come', 'into', 'action', ',', 'the', 'shaper-faller-wire', 'sinking', 'to', 'the', 'lowest', 'position', 'required', 'for', 'the', 'stage', 'arrived', 'at', 'in', 'building', 'up', 'the', 'spool', 'and', 'the', 'counter-faller', '(', 'weighted', ')', 'rising', ',', 'thus', 'maintaining', 'a', 'constant', 'tension', 'on', 'the', 'threads', 'or', 'lengths', 'backed-off.', 'The', 'control', 'of', 'this', 'action', 'rests', 'with', 'the', 'tin-roller shaft', ',', 'the', 'reversing', 'of', 'this', '(', 'from', 'the', 'headstock', 'as', 'already', 'described', ')', 'by', 'means', 'of', 'a', 'ratchet', '*', '29']
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