ves by means of pins pro-jecting from the rod of the air pump has been in most cases super-seded by an apparatus called an eccentric, by which the motion ofthe axle of the fly-wheel is made to open and close the valves atthe proper times. An eccentric is a metallic circle attached to a revolving… … having its centre at c, have a square hole cut in it correspondingto the shaft, g, and let the shaft, g, pass through this squareaperture, so that the circular plate, b b, shall be fastened uponthe shaft, and capable of revolving with it as the shaft revolves.The centre, c, of the circular plate…
Steam-engines · Steam-navigation · Locomotives
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