Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 182
ry to represent the thread in this way instead of by the line of thesection which is given in the figure. When the first outer and inner helices are complete, the others maybe obtained by setting off the pitch, with the dividers, from the points ofthe first lines as many times as other curves are… … 174 MECHANICAL DRAWING. PLATE XXVI. Fig. 129. A square-threaded bolt and nut, the upper part of the boltand the nut being in section. In the square thread both the thread and the space are square, eachoccupying one half the pitch. There are two helical curves at the inside ofthe thread, and two at…
Mechanical drawing
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