Chapter XI. Drawing Gear Wheels

Names of the curves and lines of gear teeth

How to draw spur wheel teeth

Professor Willis' scale of tooth proportions

The application of the scale

How to find the curve for the tooth face

To trace hypocycloides for the flanks of teeth

Sectional view of a section of a wheel for showing the dimensions through the arms and hub

To draw an edge view of a wheel; rules for drawing the teeth of wheels; bevel gear wheels

The construction to find the curves

To draw the arcs for the teeth

To draw the pitch circle of the inner and small end of the pinion teeth

One-half of a bevel gear and an edge view projected from the same

A pair of bevel wheels shown in section; drawing of a part of an Ames lathe feed motion; small bevel gears

Example in which part of the gear is shown with teeth in, and the remainder illustrated by circles; drawings of part of the feed motion of a Niles horizontal tool work boring mill

Three bevel gears, one of which is line-shaded; the construction of oval gearing; Professor Rankine's process for rectifying and subdividing circular arcs

Various examples of laying out gear wheels