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 (1883)
tooth; E is the height or depth, and F the breadth.P P is the pitch circle, and the space between the twoteeth, as H, is termed a space. It is obvious that the points of the teeth and the13 (193) 194 MECHANICAL DRAWING SELF-TAUGHT. bottoms of the spaces, as well as the pitch circle, areconcentric… … as in Figure 234, in which l^ P is the pitch circle.This circle is divided into jis many equal divisions as DI^AIVIXG GEAR WHEELS. 195 IS I7> to have teeth, these divisions belnofthe radial Hnes, A, B, C, etc. Where -e whcdenoted these di\isions intersect the pitch circle are the centresfrom…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
