. American engineer and railroad journal . l^^P the receiver proper c, while the chamber b of the low-pressurecylinder communicates through the passage I the annulargroove in the valve / and the outlet k, either with the atmos-phere or with a condenser. The chambers a, receiver c, andchamber A2 are thus filled with steam of equal pressure, andthe piston on its return stroke is acted on by a pressure con-stituted by the influence of the low-pressure steam on a pistonsurface of a size equal to the difference between the working surfaces of the twopistons. Besides thechamber b- of thelow-pressure
. American engineer and railroad journal . l^^P the receiver proper c, while the chamber b of the low-pressurecylinder communicates through the passage I the annulargroove in the valve / and the outlet k, either with the atmos-phere or with a condenser. The chambers a, receiver c, andchamber A2 are thus filled with steam of equal pressure, andthe piston on its return stroke is acted on by a pressure con-stituted by the influence of the low-pressure steam on a pistonsurface of a size equal to the difference between the working surfaces of the twopistons. Besides thechamber b- of thelow-pressure cyl-inder, the an-nular space caround the high-pressure cylindera also forms partof the the lat-ter cylinder as wellas the small pistonis constantly cool-ed by the low-pressure steampresent within saidspace (■, while thelow-pressuresteam presentwithin chamber 4sconstantly heatsthe low-pressurecylinder as well asthe large reason of thesefunctions of saidspaces, the engineis specially adapt-ed to be driven by. Fig. 4. SCHMIDTS DOUBLE-ACTING STKAMENGINE. superheated steam. There is, then, the further advantagethat Stuffing-boxes may entirely be dispensed with. This form of engine is the Invention of Mr. WilhelmSchmidt, of Wilhelmsh6he, Germany. We are not able tosay with certainty whether Ibis is I he kind of engine—butpresume it was—which was tested in connection with theboiler which was illustrated and described in our issues ofFebruary and April, and of the performance of which reportsare given in the former and also in Ibis number of TiikAmerican Engineer. The number of Mr. Schmidts patent is 535,864, and it isdated March 9, 1895. Vol. LXIX, No. 5.] AND RAILROAD JOURNAL. 241 A ERONAUT1C s. Under ihis heading we shall hereafter publish all matter relating to the Interesting subject of Aerial Navigation, abranch of engineering which is rapidly increasing In generalinterest. Mr. (). Chanute, , of Chicago, has consented toact as Associate Ed
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
