Leeds, Charles Carley, 1870- [from old catalog] · New York, D. Van Nostrand company · leaf 18
nes at one side and pass midway between that line andthe next at the opposite side, as indicated by the light dash line d-e.In other words, the slope equals half of the pitch of the thread. Place the dimensions just as shown in the illustration, and makethe figures carefully, so that there can be… … ?p- 6 Thds. per inch
Mechanical drawing
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