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Principles of Machine Construction Volume 1; Being an Application of Geometrical Drawing for the Representation of Machinery download torrent

Principles of Machine Construction Volume 1; Being an Application of Geometrical Drawing for the Representation of Machinery download torrent

Principles of Machine Construction Volume 1; Being an Application of Geometrical Drawing for the Representation of Machinery by Edward Tomkins
Principles of Machine Construction Volume 1; Being an Application of Geometrical Drawing for the Representation of Machinery
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Author: Edward Tomkins
Number of Pages: 106 pages
Published Date: 01 May 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781231330883
File Name: Principles.of.Machine.Construction.Volume.1;.Being.an.Application.of.Geometrical.Drawing.for.the.Representation.of.Machinery.pdf
Download Link: Principles of Machine Construction Volume 1; Being an Application of Geometrical Drawing for the Representation of Machinery
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878* Excerpt: ...of expressing the rate of motion of rotating pieces, and in the following paragraphs we give examples of those methods. Let N and n denote the number of teeth, and E. and r the radius of the driver and follower respectively; then N_R n r Again, let V and v respectively denote the angular velocities, and E and e the number of revolutions of each in a given time; then N_B_, _ e. nrVE Besides the above, we have to consider the pitch of the teeth of the wheels, and as most of our calculations involve this quantity, we shall therefore define the term and give some examples. 234. Pitch.--There are two methods of defining the pitch of a tooth; by the first, which is the most common, we speak of circular pitch, and by the second, which is used for small pitches only, of diametral pitch. 235. The Circular Pitch of a tooth is the distance, measured along the pitch line, from the centre of one tooth to the centre of the next; if the pitch line is a straight line, as in the case of a straight rack, the pitch is the distance, measured as before, along that straight line. The pitch is sometimes defined as the distance, measured as before, from the inside or outside of a tooth to the corresponding inside or outside uf the next tooth, of course the length is the same in both cases. In fig. 234, page 198, the distance A D or /C represents the pitch, and in fig. 2, Plate XL, it is represented by g C or C n, etc. If the pitch line is a curved line, as a circle, the pitch is measured along the arc of the pitch line; that is, suppose the pitch is 1 inch, we mean the arc, and not the chord of the pitch line between the centres of two adjacent teeth, is 1 inch long. In the case of complete wheels it will be readily understood that the pitch must be contained a whole number of ti...

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