['96', '(', '146', ')', 'WOOLLEN', 'AND', 'WORSTED', 'SPINNING', '.', 'found', 'that', 'the', 'carding', 'contact', '(', '3', ')', 'Fig.', '32', 'is', 'com-', 'paratively', 'long.', 'If', 'with', 'the', 'same-sized', 'swift', 'is', 'worked', 'a', 'small', 'doffer', ',', 'the', 'carding', 'arc', 'of', 'contact', 'is', 'short.', 'There', 'is', 'probably', 'some', 'relationship', 'between', 'fibre', 'length', 'and', 'the', 'length', 'of', 'the', 'carding', 'arc', 'of', 'contact—but', 'again', 'this', 'may', 'be', 'affected', 'by', 'whether', 'the', 'teeth', 'of', 'the', 'doffer', 'are', 'made', 'to', 'retreat', 'from', 'the', 'swift', 'or', 'to', 'act', 'against', 'the', 'swift', 'There', 'is', 'also', 'the', 'extra', 'cost', 'of', 'making', 'and', 'driving', 'the', 'larger', 'doffer', 'to', 'be', 'taken', 'into', 'account', ',', 'and', 'possibly', 'the', 'wearing', 'surface', 'of', 'the', 'card', 'clothing', 'also', 'to', 'be', 'considered—including', 'the', 'ratio', 'between', 'wear', 'due', 'to', 'work', 'and', 'wear', 'due', 'to', 'exposure', 'in', 'the', 'mill', 'atmosphere.', 'The', 'following', 'are', 'the', 'usual', 'sizes', 'of', 'woollen', 'card', 'cylinders', ':', 'Cylinders', 'or', 'swifts', '54', 'in', ',', 'diameter', 'to', '50', 'in.', 'Breasts', '54', '36', 'Doffers', '50', '24', 'Workers', '5', ',', 'Strippers', '5', 'Fancies', '9', 'Of', 'the', 'two', 'types', 'of', 'framework', ',', 'viz.', ',', '"', 'box bends', 'and', 'flat bends', ',', '"', 'the', 'box bends', 'are', 'to', 'be', 'preferred', 'as', 'usually', 'allowing', 'of', 'more', 'refinement', 'in', 'the', 'setting', 'of', 'the', 'cylinders', '(', 'Fig.', '33', ')', '.', 'In', 'either', 'case', 'the', 'bends', 'should', 'be', 'fitted', 'close', 'up', 'to', 'the', 'cylinders', 'to', 'prevent', 'the', 'development', 'of', 'air', 'currents', ',', 'and', 'the', 'outside', 'driving', 'arrangement', 'should', 'be', 'designed', 'to', 'allow', 'of', 'protection', 'to', 'the', 'bearing', 'hubs', 'of', 'the', 'worker', ',', 'stripper', 'and', 'fancy', 'shafts.', 'Of', 'the', 'details', 'of', 'construction', 'perhaps', 'the', 'wood-plugging', 'positions', 'are', 'all-important', ',', 'but', 'there', 'are', 'obviously', 'many', 'points', 'in', 'the', 'design', 'of', 'a', 'carding engine', 'where', 'details', 'have', 'a', 'very', 'important', 'bearing', 'upon', 'utility', 'and', 'economic', 'running', 'The', 'question', 'may', 'here', 'be', 'debated', 'as', 'to', 'whether', 'machines', 'should', 'be', 'single', ',', 'double', ',', 'or', 'treble', 'style', 'I2', '2', '16', '96']
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