A textbook on mechanical and electrical engineering (1902) (14585715987)

Identifier: textbookonmechan00inte (find matches)
Title: A textbook on mechanical and electrical engineering
Year: 1902 (1900s)
Authors: International Correspondence Schools
Subjects: Mechanical drawing Mechanical engineering Electrical engineering
Publisher: Scranton : International Textbook Co.
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries



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PROBLEM /^ ■Y Engineer Company. rved. JOfYN SMFTH, CLAS3 NS 4529. §15 PRACTICAL PROJECTION 71 of the solid with the cutting plane are thus shown; andby using methods of projection already presented, any viewof the section may then be drawn. Those portions ofthe solid assumed to have been removed are not shown in asection drawing, although their position is sometimes indi-cated by dotted lines. 77. Sections of the Sphere.—The solid that presentsthe most simple illustrations of sections is the sphere, or globe.This solid, also called a ball, is such as would be generated bythe revolution of a circle around its diameter as an axis. The cylinder, cone, and sphere are sometimes called thethree round bodies, or the solids of revolution. It will beshown later that their imaginary formation by such revolutionmay be taken advantage of by practical short methods of pro-jection, the principles of which are based on this knowledge. A full view of any section of a sphere is a circle. If thecu