The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion- forming a complete course of mechanical, engineering, and architectural drawing (1854) (14773330942)
Summary
Identifier: practicaldraught1896arme (find matches)
Title: The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing
Year: 1854 (1850s)
Authors: Armengaud, aîné (Jacques-Eugène), 1810-1891 Armengaud, Charles A., 1813-1893 Amouroux, Jules Cory, William Johnson, 1823-1892
Subjects: Decorative arts Drawing
Publisher: New York, Stringer & Townsend
Contributing Library: Sterling and Francine Clark Art Institute Library
Digitizing Sponsor: Sterling and Francine Clark Art Institute Library
Text Appearing Before Image:
Armencaud x Amouroux Practic al D raughtsmaE
Text Appearing After Image:
liiiicinraiid & Imourmix BOOK OP INDUSTKIAL DESIGN. 49 FRICTION OF SURFACES IN CONTACT. 162. Friction is the resistance which one surface offers toanother—moving or sliding on it. Friction may be distinguishedas sliding friction, and the friction of rotation. The former is thatwhich arises from the simple rubbing of one surface upon another;the latter, from the rotation of one surface upon another. The friction caused by the rubbing of plane surfaces is inde-pendent of the extent of surface or velocity of movement; itdepends essentially on the weight of the body, or, more accu-rately, the pressure binding the two surfaces together. It maytherefore be said, that the friction is in proportion to the pressure. Similarly, the friction of a journal in its bearings is indepen-dent of the length of these, but is proportional to the diameterand to the pressure. We give tables for each of these classes of friction, indicatingthe ratio of the friction to the pressure, and consisting of a