Popular Lectures On Science And Art Delivered in the Principal Cities And Towns
The book Popular Lectures On Science And Art Delivered in the Principal Cities And Towns was written by author Dionysius Lardner Here you can read free online of Popular Lectures On Science And Art Delivered in the Principal Cities And Towns book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Popular Lectures On Science And Art Delivered in the Principal Cities And Towns a good or bad book?
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Fig. 22. Numerous examples of wheels and axles driven by straps or cords occur in machinery, applied to almost every department of the arts and manufactures. In the turning-lathe, the wheel worked by the treddle is connected with the mandrel by a catgut cord passing through grooves in the wheel and axle. In all great factories revolving shafts are carried along the apartments, on which, at certain intervals, straps are attached, passing round their circumferences, and carried round the wheels w...hich give motion to the several machines. If the wheels, connected by straps or cords, are required to revolve in the same direction, these cords are arranged as in fig. 22 ; but if they are required to re- volve in contrary directions, they are applied as in fig. 23. Fig. 23. One of the chief advantages of the method of transmitting motion between wheels and axles by straps or cords is, that the wheel and axle may be placed at any distance from each other which may be found convenient, and may be made to turn either in the same or contrary directions.
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