A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 83
levation forward or back-ward, the lower edge making the required angle withthe base upon which the object stands. Looking downon the prism in Fig. 59, again, it will be seen that thewidth of the object does not alter when it is revolvedforw^ard or backward. Draw the three projectionswhen so… … Fig. 79 Principle 3.—When the object revolves about a frontaxis (1 to P), forward or backward, its side elevationdoes not change save in its position, and the width re-mains the same. CHAPTER VII THE DETAILED WORKING DRAWING \ MACHINE is a composition of many parts.-^^ Each part performs a certain…
Mechanical drawing
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