A water tank is often used to serve as a counterpoise, or balance, and may be made variable by varying the quantity of water by a siphon or other device.
For Balanced Valves, see [Section 89].
Section 21.—CIRCULAR AND RECIPROCATING MOTION.
[392]. The ordinary type of piston-rod and crank motion as universally used.
[393]. Watt’s substitute for the above, or “sun-and-planet” gear. Note that the crank shaft revolves twice for each double stroke or revolution of the engine. The crank being a loose link only, the planet wheel does not revolve.
[394]. Epicycloidal parallel motion and crank. The pinion is one-half the diameter of the wheel on pitch line, and the connecting pin is fixed on the pitch line of pinion.
[395]. Bernay’s patent crank motion; radius of crank = stroke × ·25.
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