Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments. Elementary instruction in practical mechanical drawing. Together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1889)
side. Figure 204 represents a case in which this hasbeen done, and it will be observed that the lines de-noting the bottom of the thread do not meet the bot-toms of the thread, which occurs for the reason that the. … Fig. 206.angle for the bottom is not the same as that for the o top of the thread. In inking in the thread, it enhances the appearanceto give the bottom of the thread and the right-hand XICAL DRA, HT. side of the same, heavy shade lines, as in Figure 202,a plan that is usually adopted for threads…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
