Five hundred and seven mechanical movements (1903)
Brown, Henry T. [from old catalog] · New York, Brown & Seward · leaf 17
re known as Span-ish bartons. 18. Is a combination of two fixed pulleysand one movable pulley. 19, 20, 21, and 22. Are different arrange-ments of pulley^.. The following rule apphesto these pulleys:—In a system of pulleyswhere each pulley is embraced by a cord at-tached at one end to a fixed point… … Mechanical Movements. 13 23. A contrivance for transmitting rotarymotion to a movable pulley. The pulleyat the bottom of the figure is the movableone ; if this pulley were raised or depressed,the belt would be slackened or tightenedaccordingly. In order to keep a uniformtension on the belt, a…
Mechanical movements
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