['247', '(#321)', '############################################', 'PRINCIPLES', 'AND', 'PRACTICE', 'An', 'important', 'distinction', 'should', 'be', 'drawn', 'between', 'calculated', 'and', 'actual', 'twist.', 'In', 'fact', 'with', 'reference', 'to', 'all', 'textile', 'machinery', 'there', 'is', 'room', 'for', 'much', 'research', 'on', 'the', 'reason', 'for', 'the', 'marked', 'difference', 'between', 'the', 'theoretical', 'and', 'actual', 'results', 'obtained.', 'An', 'approx-', 'imation', 'of', 'theoretical', 'and', 'actual', 'results', 'should', 'be', 'diligently', 'sought', 'for.', 'With', 'reference', 'to', 'all', 'these', 'spindles', 'and', 'their', 'equip-', 'ment', 'the', 'following', 'points', 'should', 'be', 'specially', 'noted', ':-', '1.', 'the', 'driven', 'parts_flyer', 'or', 'spindle-should', 'be', 'well', 'designed', 'to', 'stand', 'running', 'for', 'years', 'at', 'normal', 'speeds', 'and', 'easily', 'oiled', ';', '2.', 'the', 'driven', 'parts', 'should', 'be', 'driven', 'under', 'con-', 'ditions', 'which', 'will', 'ensure', 'absolute', 'regularity', 'of', 'running', 'from', 'day', 'to', 'day', 'and', 'week', 'to', 'week', '-chain', 'drives', 'wherever', 'possible', ';', '3.', 'the', 'system', 'of', 'control', 'adopted', 'should', 'be', 'certain,', 'easy', 'to', 'manipulate,', 'and', 'should', 'give', 'no', 'occa-', 'sion', 'for', 'the', 'taking-in', 'of', 'grit', 'or', 'for', 'the', 'splash-', 'ing', 'of', 'oil', 'on', 'to', 'the', 'yarn', 'during', 'spinning;', '4.', 'the', 'lifter-or', 'ring-rail-should', 'be', 'under', 'delicate', 'control-positive', 'or', 'negative', 'and', 'it', 'should', 'be', 'impossible', 'for', 'it', 'to', 'give', 'any', 'other', 'distribu-', 'tion', 'than', 'that', 'demanded', 'from', 'it*', ';', '5.', 'the', 'system', 'of', 'yarn-control', 'due', 'to', 'the', 'relation-', 'ship', 'of', 'front', 'rollers', 'and', 'spindles', 'should', 'be', 'such', 'as', 'to', 'give', 'the', 'necessary', 'support', 'to', 'the', 'thread', 'during', 'twisting,', 'and', 'to', 'direct', 'it', 'satisfac-', 'torily', 'to', 'its', 'position', 'on', 'the', 'spool', 'or', 'bobbin.', 'Lifter', 'Motions.', 'The', 'distribution', 'of', 'the', 'delivered', 'thread', 'on', 'to', 'the', 'spool,', 'bobbin', 'or', 'tube', 'is', 'a', 'fascinating', '*', 'The', 'problem', 'of', 'obtaining', 'a', 'stationary', 'ring-rail', 'in', 'ring', 'spinning', 'is', 'of', 'much', 'moment.', 'Reference', 'is', 'made', 'to', 'this', 'type', 'in', 'Chapter', 'IV.', '247']
[[63, 63, 'Textile Machine Part'], [206, 206, 'Textile Machine Part'], [260, 260, 'Textile Machine Part'], [165, 165, 'Textile Machine Part'], [166, 166, 'Textile Machine Part'], [203, 204, 'Textile Machine Part'], [232, 232, 'Textile Machine Part'], [234, 234, 'Textile Machine Part'], [235, 235, 'Textile Machine Part'], [246, 246, 'Textile Machine Part'], [247, 247, 'Textile Machine Part'], [249, 249, 'Textile Machine Part']]