The Norwalk Air Compressor (1888) . thoroughly studied and improved in every way thatwas then evident. The machine at once took the first rank. Yet a constantwatch over all requirements and possibilities has shown from time to timemany places for improvement. Some of these changes may be of interest, and their illustration may per-haps be of assistance to a full understanding of the construction of the Nor-walk Compound Air Compressor. We therefore illustrate the patterns made since 1880. The brief notesopposite each cut, together with a more extended description in the followingpages, will se
The Norwalk Air Compressor (1888) . thoroughly studied and improved in every way thatwas then evident. The machine at once took the first rank. Yet a constantwatch over all requirements and possibilities has shown from time to timemany places for improvement. Some of these changes may be of interest, and their illustration may per-haps be of assistance to a full understanding of the construction of the Nor-walk Compound Air Compressor. We therefore illustrate the patterns made since 1880. The brief notesopposite each cut, together with a more extended description in the followingpages, will serve to show the more important features of our are also very many minor details of the machines in which our prac-tice differs from usual patterns. To illustrate these would make our circulartoo bulky. We would say, however, that in every case we have substantialreasons for each particular form of construction, and have adopted the designsand the materials which experience has shown to be the best as our I f 0 00(D 0 u(D ; 1 9 Pattern of 1880. The cut on opposite page illustrates the Compound Air Compressors asconstructed in iS8o, with Steam and Air Cylinders of 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 lo
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdivisio, bookyear1888
