Mechanical drawing; a treatise on the drawing of mechanical and machine details (1920)
Jones, Franklin Day, 1879-1967 · New York, The Industrial press; [etc., etc.] · leaf 62
Machinery,N. Y. Fig. 23. Scales used by Draftsmen pen will draw perfect circles from less than -^ inch diameterto 3! inches diameter. There is one 3^-inch pencil compasswith fixed pencil and needle points, and a 5^-inch pen com-pass with fixed pen and needle points, and hairspring adjust-ment. The…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
