Shop practice for home mechanics, use of tools, shop processes, construction of small machines. Contains a chapter also on theoretical mechanics and on miscellaneous information relative to shop work (1920)
Yates, Raymond F. (Raymond Francis), 1895- · New York, N. W. Henley Pub. Co. · leaf 105
Fig. 122—Showing one use of the protractorwork, the protractor would be held on the work as shownin Fig. ,122. A very useful addition to an ordinary scale is shown in … Fig, 123—A key-way scale and its use Fig. 123. The two small blocks attached to the scale areknown as key rule blocks and by their aid it is possible tolay out a straight line upon a circular piece of work. Ifthe rule is used without this it is not known whether-theline is straight or not. CHAPTER…
Machine-shop practice · Handicraft
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