. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . er. Fig. 4 is a central section of oneform of valve, and Fig. 5 showing astructural modification. They both com-prise a casing having connections adapted FIG. 3. on each side of the piston. Means areused for controlling and limiting thetravel of the valve. This appliance is automatic in its ac-tion and needs no attention whateverfrom the engineer, and has been in oper-ation on about 30 locomotives, some ofthem having the appliance for nearly twoyears, and its success has been in everyrespect
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . er. Fig. 4 is a central section of oneform of valve, and Fig. 5 showing astructural modification. They both com-prise a casing having connections adapted FIG. 3. on each side of the piston. Means areused for controlling and limiting thetravel of the valve. This appliance is automatic in its ac-tion and needs no attention whateverfrom the engineer, and has been in oper-ation on about 30 locomotives, some ofthem having the appliance for nearly twoyears, and its success has been in everyrespect complete. Structural modifications have beenprovided so that the appliance may beadapted to any existing type of locomo-tive, and separate devices have beenperfected and successfully applied to themore complex types of 4 and S illustrate a new type ofdrifting-valve for locomotive engineswhich is of a simple construction andcontrols the supply of a limited quantityof steam to the valve chest and cylinderswhen drifting, or running with throttleclosed, and acting automatically under. FIG. 4. to communicate respectively with thevalve chest or engine cylinders, and alive steam supply from the boilers, andcontaining a valve subject on one sideto the pressure from the valve chesttending to close the same, and on theopposite side to live steam pressure tend-ing to open the valve, a portion of itsarea being exposed to the shown in Fig. 5, if it be desired tovary the maximum degree of pressure,which may be admitted through the valvedevice, or in other words, to adjust thedegree of pressure at which the valvewill automatically close, a spring may beemployed acting between the top of thevalve and an adjustable screw plugmounted in the casing and having a locknut. This spring assists the steam pres-sure in closing the valve, and by adjust-ing the screw plug the maximum degree
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
