The Structure of the Cotton Fibre in Its Relation to Technical Applications
The Structure of the Cotton Fibre in Its Relation to Technical Applications
F H Frederic Hungerford Bowman
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recording dial is double, and can easily be set back to zero without turning the machine, by simply releasing the milled-head seen above the dial, when the top plate can be turned in either direction and clamped to the position required by screwing up the nut again. When the machine is about to be used the sliding bar is set to the number of inches required to be measured, and the thread slipped into the two jaws and made fast. The small wheel is then turned round in the proper direction until ...all the twist is out of the yarn, and the number of turns is read off the dial which was set to zero before commencing. It is quite clear that since our doubling and spinning machines are so arranged that a certain fixed amount of twist is put into a certain number of inches of yarn if the material of which the thread is composed was equally elastic in every pa?t, and equally even in diameter we should have perfect uniformity in twist; and even as it is, with all the imperfections in this respect, if we take a sufficient L 146 STRUCTURE OF THE COTTON FIBRE.
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