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| Reducing scales |
175 |
| Making a drawing to scale |
177 |
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PROJECTIONS.
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| 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 |
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DRAWING GEAR WHEELS.
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| 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 |
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PLOTTING MECHANICAL MOTIONS.
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| 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
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