. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. re longitudinal relief channels I for the purpose of allowing thecompressed air to pass from the upper to the lower side of the piston B, when the latter passesbeyond the ends of the channels, and so to restore the equilibrium within 0. Fig. 1415 is a sectionthrough the apparatus employed for supplying the compressed air to the cylinder 0. Thecylinder of the air pump M, with its section and delivery valves NO, are placed within theclosed chamber P, which is filled with water to above the level of the openi
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. re longitudinal relief channels I for the purpose of allowing thecompressed air to pass from the upper to the lower side of the piston B, when the latter passesbeyond the ends of the channels, and so to restore the equilibrium within 0. Fig. 1415 is a sectionthrough the apparatus employed for supplying the compressed air to the cylinder 0. Thecylinder of the air pump M, with its section and delivery valves NO, are placed within theclosed chamber P, which is filled with water to above the level of the opening Q, the water beingpoured into the cistern at the siphon trap Q, through which also is drawn the supply of air tothe suction valve N; the object of this arrangement being to purify and cool the air before com-pressing it. The bottom of the accumulator chamber R is also made to dip into the water inthe cistern P for the purpose of keeping cool the compressed air contained therein. The accumu-lator ram R is loaded with weights in the usual way in order to obtain the required pressure. within the chamber R and cylinder 0. The pump plunger K is worked from an eccentric on theshaft L. To obviate the necessity for stopping the plunger K each time that the accumulatorcylinder is suflSciently charged, the following means are adopted. A rocking shaft S is mountedin the cistern P, and is provided with a cam or lever arm S so placed as to be capable of liftingthe suction valve N off its seat and supporting it in that position. One end of the shaft S isprolonged through the side of the cistern P, and is provided with a lever arm and a connectingrod T, thus causing the shaft S to revolve and the cam S to raise the suction valve N from itsseat, so that the plunger K will continue to oscillate without supplying any air to the accumulatorR. Directly the quantity of air within the accumulator R is reduced and the ram R descends,the rod T will drop and allow the cam S and valve N to return to
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
