# American Machinist Volume 3

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## Description

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1880 edition. Excerpt: ... in inches, and this quotient will be the area A, in square inches. To find the weight to, of the lever arm a, valve '0, and stem s, the area A, of the valve in square inches steam pressure p, length of ahort lever Z, in inches, weight W, in pounds, Rule in WOl'dS: . Multiply the area A, of the valve in square inches by the steam pressure p, in pounds per square inch, and this product by the length of the short lever I, in inches from this last product subtract the momentum of the lever arm a, valve 0, and stem s, and divide this remainder by the weight W, in pounds; the quotient will be the distance in inches from fulcrum f, to place the weight W. To find the pressure per square inch that a safety valve will blow off at, the weight W, length of long lever L, the weight of lever arm a, valve v, and stem s, distance rc, of center of gravity g, area A, and length of short lever l. 50 Example 4. A safety valve having the following dimensions, at what pressure p, per square inch, will it blow off 'I 7.068 Lever L: Steam pressure p= =80 lbs. 7 x 8 Example 5. The following dimensions and Multiply the area A, of the valve in square inches by the steam pressure 11, in pounds per square inch, and this product by the length of short lever l, from this last product subtract the product of the weight W, in pounds, multiplied by the length of the long lever L, in inches, and divide this remainder by the distance a:, of the center of gravity g, to fulcrum f. To find the distance 2:, in inches from center of gravity g, to fulcrum f, the area A, in square inches of the valve, the steam pressure p, in pounds per square inch, the short lever Z, the weight W, in pounds, the length of the long lever L, in inches, and the weight '10, of the lever...show more

## Product details

• Paperback | 972 pages
• 189 x 246 x 49mm | 1,696g
• United States
• English
• black & white illustrations
• 1236913175
• 9781236913173