Engineers and Mechanics Pocket Book

by Chas H. Haswell

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. 1853 edition. ... of a Tooth, the Strain at the Pitch Line being given. Rule.--Divide the pressure in pounds at the pitch line by 3000, and the square root of the quotient is the thickness of the tooth in inches. Example.--The pressure is 9000 lbs., what is the thickness of the tooth required 1 9000., 3000 = L732 mches Ans The Breadth should be 2.5 times the pitch. Therefore, as the thickness should be 0.47 of the pitch, the pitch for the above example will be 3.685 inches, and the breadth 3.685 X2.5 = 9.2125 inches. To find the Horses Power of a Tooth, the Dimensions and Velocity being given. Thickness 2 X3000--pressure. Pressure X velocity in feet per minute 33000 Thickness X 2.1277+ = the pitch. Thickness X 1.5384+ = the horses' power. To find the Dimensions of the Arms of a Wheel. Rule.--Multiply the power at the pitch line by the cube of the length of the arms, and divide this product by the product of the number of arms and 280; the quotient will be the breadth and cube of the depth. Example.--If the power be 1600, the diameter of the wheel 10 feet, and the number of arms 6, what will be the dimensions of each arm 164 GENERAL EXPLANATIONS CONCERNING WHEELS. GENERAL EXPLANATIONS CONCERNING WHEELS. Pitch Lines.--The touching circumferences of two or more wheels, which act upon each other. Pitch of a Wheel.--The distance of two contiguous teeth, measured upon their pitch line. Length of a Tooth.--The distance from its base to its extremity. Breadth of a Tooth.--The length of the face of the wheel. Spur Wheels.--Wheels that have their teeth perpendicular to their axis. Bevel Wheels.--Wheels having their teeth at an angle with their axis. Crown Wheels.--Wheels which have their teeth at a right angle with theif axis. Mitre Wheels.--Wheels having...

76 pages, Paperback

Published October 12, 2012