The Norwalk Air Compressor (1888) . f 20 inches diameter and24 inches stroke. The Compressing^ Air Cylinder is shown between the steamand Intake Air Cylinder and is tjJl^ inches in diameter. The air valves wereof thi- Poppet variety, of the most approved construction and very liberal inarea. Both air cylinders were provided with Water Jackets, The air wastaken into the large cylinder. Tt was there partly compressed and thenceconducted by a large pipe to the smaller compressing cylinder, where it wascompressed to the desired pressure. The objects aimed at in this construc-tion, were, first, to
The Norwalk Air Compressor (1888) . f 20 inches diameter and24 inches stroke. The Compressing^ Air Cylinder is shown between the steamand Intake Air Cylinder and is tjJl^ inches in diameter. The air valves wereof thi- Poppet variety, of the most approved construction and very liberal inarea. Both air cylinders were provided with Water Jackets, The air wastaken into the large cylinder. Tt was there partly compressed and thenceconducted by a large pipe to the smaller compressing cylinder, where it wascompressed to the desired pressure. The objects aimed at in this construc-tion, were, first, to make the resistance of the air to compression an averageresistance throughout the stroke, instead of the excessive and maximum re-sistance at the end of the stroke, which is obtained in all Single Compressors;secondly, to reduce the losses of clearance spaces to the smallest amount byhaving the pressure in the Intake Cylinder a light pressure; third, to have theadvantages of two Water Jackets and more time for cooling the air. lO 4. CD(0 H 0 u (D-p-p r 1 II Pattern of 1881 A In this was added an Intercooler between the two Air Cylinders. ThisIntercooler consists of a large pipe or reservoir filled with thin brass waterpipes. The air in its passage to the second cylinder becomes divided intothin streams by the water pipes, and thus each particle is broujzht into contact * with a cold surface and its temperature rapidly reduced. Here is also shownthe Hand Wheel for varying the point of steam cut off, which can be adjustedto suit circumstances, while the machine is in motion. By Pass Valves forconvenience in starting without changing cut off point are also shown. ^ 12
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdivisio, bookyear1888
