href="@public@vhost@g@gutenberg@html@files@23319@23319-h@23319-h-5.htm.html#page174" class="pginternal" tag="{http://www.w3.org/1999/xhtml}a">174
Reducing scales
175
Making a drawing to scale
177
PROJECTIONS.
A spiral wound around a cylinder whose end is cut off at an angle
178
A cylindrical body joining another at a right-angle; a Tee for example
180
Other examples of Tees
181
Example of a cylinder intersecting a cone
186
A cylindrical body whose top face if viewed from one point would appear as a straight line, or from another a circle
188
DRAWING GEAR WHEELS.
Names of the curves and lines of gear teeth
193
How to draw spur wheel teeth
194
Professor Willis' scale of tooth proportions
195
The application of the scale
197
How to find the curve for the tooth face
198
To trace hypocycloides for the flanks of teeth
200
Sectional view of a section of a wheel for showing the dimensions through the arms and hub
202
To draw an edge view of a wheel; rules for drawing the teeth of wheels; bevel gear wheels
203
The construction to find the curves
204
To draw the arcs for the teeth
205
To draw the pitch circle of the inner and small end of the pinion teeth
206
One-half of a bevel gear and an edge view projected from the same
207
A pair of bevel wheels shown in section; drawing of a part of an Ames lathe feed motion; small bevel gears
208
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
209
Three bevel gears, one of which is line-shaded; the construction of oval gearing; Professor Rankine's process for rectifying and subdividing circular arcs
210
Various examples of laying out gear wheels
214
PLOTTING MECHANICAL MOTIONS.
To find how much motion an eccentric will give to its rod
223
To find how much a given amount of motion of a long arm will move the short arm of a lever
224
Example of the end of a lever acting directly on a shoe; a short arm having a roller acting upon a larger roller
225
A link introduced in the place of the roller to find the amount of motion
