American School of Correspondence · Chicago, American school of correspondence · leaf 329
goes higher until it reaches the top of the bobbin. This 291 250 COTTON SPINNING is accomplished in the following way: The worm, W^ instead ofengaging a rack as on the warp builder, is in gear with a worm gear,V^, the hub of which is made as a drum upon which the builder chain,T^, is wound. The…
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