Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 386
arn and no more for each swing ofthe batten. A frictional let-off givesoff all the yarn that the take-up willtake from it. The take-up may bepositive, requiring a given amount ofyarn, or it may be conservative, takingall that the let-off will allow it to have.It is obvious that there cannot be… … 370 LOUCHETTE. for the shortening of the warp due to its interlacing with the weft. The nearest approach to this isthe positive take-up and frictional let-off; or there may be a positive let-off and a conservative take-up which maintains a constant pull. The relative advantages of these two systems…
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