Elementary projection drawing. Theory and practice. For preparatory and higher scientific schools, industrial and normal classes; and the self-instruction of teachers, inventors, draftsmen, and artisans. In six divisions .. (1880)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 268
. 159 ing practice, the other three from mechanical engineering; styl-ing them exercises, since, being partially shown (yet, with thedescription, sufficiently so for their purpose), they leave some-thing to be supplied by the student from the general insightgained from previous practice. Exercise… … valves either lift from their seats, as in the example shown, or slide offthem, in which case they are sometimes called gates. The figure represents what is called a globe-valve, from the generalexternal form of its valve-chamber NCCL. In this chamber is a bent par-tition, or diaphram, CEC,…
Geometrical drawing · Mechanical drawing
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