. American engineer and railroad journal . ingelevated, a single lever being used to throw the elevatingmechanism in or out of action. The pump is double-acting, has two sizes of plungers andthree speeds of delivery, and one or all of which are underinstant control by trip-valves. The pressure-gauge is graduatedfor tons of pressure and for pounds per square inch on the sliding-head is supported by rollers running on planedways on the base, and is held in position by large steel keys. The maximum distance between tie-bars is 96 ins., while thatbetween the end of the ram and sliding-head
. American engineer and railroad journal . ingelevated, a single lever being used to throw the elevatingmechanism in or out of action. The pump is double-acting, has two sizes of plungers andthree speeds of delivery, and one or all of which are underinstant control by trip-valves. The pressure-gauge is graduatedfor tons of pressure and for pounds per square inch on the sliding-head is supported by rollers running on planedways on the base, and is held in position by large steel keys. The maximum distance between tie-bars is 96 ins., while thatbetween the end of the ram and sliding-head is 8 ft. 8 opening in the head for axles is 12 ins. The movable por-tion of the machine is mounted on a base-plate, to which, how-ever, no strains are transmitted except those due to carryingthe weight of the parts. All of the thrust is taken by the tie-bars. ing automatic lubrication to the motor only when the noist isbeing used. The worm and worm-wheel are of steel andI hosphor bronze, and are enclosed in an oil tight case. All. FIG. 2.—VIEW SHOWING APPLICATION OF THE DAKEAIR MOTOR TO A HAND CRANE. parts of the hoist are of sufBcient strength to sustain a loadof twice their rated capacity. The air motor used with thishoist is of the double reciprocating square-piston type ofengine, and is favorably known as a desirable motor for direct Skptember, 1903. AMERICAN ENGINEER AND RAILROAD JOURNAL. 346 connection work where it is desirable to use a small, compactand high-speed motor. One o£ the many useful applications of the Dake air motoris shown in Fig. 2, which illustrates a hand crane that hasbeen changed to a power crane by its application. The con-venient form of this motor makes it a very desirable powerfor unloading derricks in freight repairyards, for railroad turntables, centrifugalpumps, fans, blowers and all classes ofhoists. The Holland Company, 77 JacksonBoulevard, Chicago, are the manufacturersof this interesting device, and from them anydesired informati
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
