American School (Chicago, Ill.), Nelson, H. William (Hector William), b. 1869 · Chicago : The School · leaf 82
simply a continuation of the motion shown on Fig. 100. A worm, is a spiral thread gear, and resembles a spiral ridge cut around a shaft. A worm gear, is almost like a spur gear, or what is commonly called an ordinary gear ; but the teeth are set slightly on an angle, «o as to mesh more perfectly in… … Fig. 101. Negative Take-Up Motion. When calculating the speed of a train of gears, which re- ceives motion from a worm, the worm is reckoned as one, that is a one tooth srear. A double worm would be counted as two. Example. 16 X 30 X 62 X 62 12 X 2 = 24 Picks. 30 X 1 X 12 X 26 X 15" E is the change…
Weaving
Internet Archive · Claire T. Carney Library, University of Massachusetts Dartmouth · Public domain (published before 1931). Free to use for anything.
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