. Railway and Locomotive Engineering . he claims made by thecompany for their new accumulators are,in addition to the complete avoidance ofshock, and that the ap|)aratus occupieslittle space. It works unfailingly. It will doeverything that a weighted accumulator governor shown immediately to the leftof the tank. Ry its action, when thewater reaches a predetermined level inthe tank, the pump is stopped and whenit falls below this level, the pump isstarted. Above the water an air pressureof 160 to 200 lbs. is maintained by thecompressor shown to the left. The low-pressure feed main is tapped int
. Railway and Locomotive Engineering . he claims made by thecompany for their new accumulators are,in addition to the complete avoidance ofshock, and that the ap|)aratus occupieslittle space. It works unfailingly. It will doeverything that a weighted accumulator governor shown immediately to the leftof the tank. Ry its action, when thewater reaches a predetermined level inthe tank, the pump is stopped and whenit falls below this level, the pump isstarted. Above the water an air pressureof 160 to 200 lbs. is maintained by thecompressor shown to the left. The low-pressure feed main is tapped into thebottom of this lank and through it thewater is forced by the pressure of the airabove it. This same air pressure is pipedover to the accumulator proper and thereby the force it exerts upon a piston mov-ing in the large cylinder at the top, itbalances the higher pressure frotn thejiump, acting upon the piston in the smallcylinder at the bottom. The areas ofthese pistons are made inversely pro[)or-tiunal to the pressures upon IIVDKO \TOR will do, and more—it will provide twopressures—a low pressure for effectingthat part of the stroke which is madeagainst no resistance, and is a large per-centage of the stroke of almost everyhydraulic press tool, and a high pressurethat effects the final squeeze. Further-more the operating valve that can be usedin connection with tliis system requiresno more wheels or levers than the ordin-ary valve, because the change from lowto high pressure is made automaticallyat the instant the ram encounters re-sistance, which the luw pressure cannotovercome. The accumulator that . allthis is shown in the illus-tration. In the center is .i large boiler-plate tank kept partially tilkd with waterby the low pressure pump, the operationof which is controlled by the hydraulic The hydro-pneumatic accumulator ismade t<.)r high pressures by simply omit-ting the low pressure pump an
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyork, bookyear19
