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The Practical Engineer's Pocket Guide; Containing a Concise Treatise on the Nature and Application of Mechanical Forces; Action of Gravity; The Elements of Machinery; Rules and Tables for Calculating the Working Effects of Machinery; Of the Strengt

The Practical Engineer's Pocket Guide; Containing a Concise Treatise on the Nature and Application of Mechanical Forces; Action of Gravity; The Elements of Machinery; Rules and Tables for Calculating the Working Effects of Machinery; Of the Strengt


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About the Book

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. 1847 Excerpt: ...a rise or traverse motion equal to the pitch of the screw, or distance between the two consecutive threads, --the pitch being the height or angle of inclination and the circumference the length of the plane. Hence, the mechanical advantage is, as the circumference of the circle described by the lever where the power acts is to the pitch of the screw, so is the force to the resistance in-principle. Ex. Required the effective power obtained by a screw of 5 inch pitch, and moved by a force equal to 50 lbs. at the extremity of a lever 30 inches in length. THE SCREW. Ex. 2. Required the power necessary to overcome a resistance equal to 7000 lbs. by a screw of inch pitch and moved by a lever 25 inches in length. 7CC0xl-25-= 55-73 lbs. power. 23 X 2 X 3-1416 In the case of a screw acting on the periphery of a toothed wheel, the power is to the resistance as the product of the circle's circumference described by the winch or lever, and radius of the wheel, to the product of the screw's pitch and radius of the axle or point, whence the power is transmitted; but observe that, if the screw consist of more than one thread, the apparent pitch must be increased so many times as there are threads in the screw. Hence, to find what weight a given power will equipoise, Rule.--Multiply together the radius of the wheel the length of the lever at which the power acts, the magnitude of the power, and the constant number 6-2832; divide the product by the radius of the axle into the pitch of the screw, and the quotient is the weight that the power is equal to. Ex. What weight will be sustained in equilibrio by a power of 100 lbs. acting at the end of a lever 24 inches in length, the radius of the axle, or point whence the power is transmitted being 8 inches, the radius of the wheel .


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Product Details
  • ISBN-13: 9781130474978
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 30
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1130474976
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 73 gr


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The Practical Engineer's Pocket Guide; Containing a Concise Treatise on the Nature and Application of Mechanical Forces; Action of Gravity; The Elements of Machinery; Rules and Tables for Calculating the Working Effects of Machinery; Of the Strengt
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