Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 92
the width of the bar. The square thread is not al-ways of this proportion, being sometimes shallower;also, the space may be either greater or less than thewidth of the thread, depending altogether upon thework to be done by it. The V or common thread may be considered as atriangular bar wound… … f/G37 87 88 A MANUAL Oi MECHANICAL DRAWING. CHAPTER VIII. Intersections and Envelopes. Plate 25. Intersection of Cylinder with Annidns. Draw centre lines A B, C D, and E F. With O ascentre draw outside of annulus HEBE and insideI J K L, also circle shown in dash and two dots repre-senting centre of…
Mechanical drawing
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