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)
Fig. 302. 284 MECHANICAL DRAWING SELF-7AUGBT. A superior example in shadingr is shown in Figures305 and 306, which represent a plan and a sectionalview of the steam-cylinder of a Blakes patent direct-acting steam-pump. The construction of the parts isas follows: A is the steam-piston ; H i and H… … Fig. 303-cylinder steam-passages ; M is the cylinder exhaustport. The main valve, whose movement alternately opensthe ports for the admission of steam to, and the escapeof steam from, the main c)hnder, is divided into two SHADING AND COLORING DRAWINGS.
Mechanical drawing
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