C, is 15 inches in diameter and has 3 feet stroke. on the lines, keeping one radius on each side in constant con- lightning rods, It drives two condensing air pumps, P P, which work al- which may be described as follows: tact with them respectively. An abutment is formed by a ternately, one on each… … ger is a spring which yields to the normal pressure of Compressed-Air Engine. are joined together, n is a metallic strip, doubled up the air in the chamber; but when, owing to the with- or corrugated so as to form a tube with spiral flanges. drawal of air to the working cylinder, the pressure in…
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