A course in mechanical drawing for evening schools and self-instruction (1896)
Rouillion, Louis · Boston, New York, The Prang educational company · leaf 67
se it is under-stood to be right-handed. A single-thread is under-stood unless otherwise noted. A scheme for putting in small dimensions is shown in the case of the topmost dimension on the sheet.Two arrow-heads embrace the part to be dimensionedand the shaft of one of the arrows serves as… … 5o COURSE IN MECHANICAL DRAWING. SHEET XXIV. Globe Valve. The valve is symmetrical about its centre-line, ex- tlie valve seat is to break away a piece of the wall cepting the construction of the valve seat. One-half and show the entire valve seat in section. To avoid is in section and the left-hand…
Mechanical drawing
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