Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . , and before the advent of the quick-action triple,it was the standard for passenger cars. It is nowmainly used on driver and tender brakes having cvlin-ders of 10 inches, or less; but with larger cylindersthe new plain triple, as shown in Fig. 233 is used. The principal difference between these two kindsof plain triples is the arrangement of the cut-out cock. In Fig. 236 the cut-out cock is attached right to thetriple, and by turning
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . , and before the advent of the quick-action triple,it was the standard for passenger cars. It is nowmainly used on driver and tender brakes having cvlin-ders of 10 inches, or less; but with larger cylindersthe new plain triple, as shown in Fig. 233 is used. The principal difference between these two kindsof plain triples is the arrangement of the cut-out cock. In Fig. 236 the cut-out cock is attached right to thetriple, and by turning the handle, which controls plug13, the triple is caused to work automatic by placingit horizontal, and to cut it out place it at an angle offorty-five- degrees; to make it work straight airplace the handle perpendicular, for then plug 13 isturned so that the end of the passage which is shown AUTOMATIC AIR BRAKES 5 6? to be in register with port d, would then be in registerwith port a, and the other end of e would registerwith d) which would allow trainpipe pressure to flowdirect into the brake cylinder through ports <z, e and d, TO £senvoi*. Figure 236Plain Triple Old Style Valve in other words, the triple valve proper and auxiliaryreservoir would not be used when the handle wasturned on for straight air. This is so seldom donenowadays that there is a lug cast in the handles of allsuch plain triples to prevent cutting them in straight air. 564 LOCOMOTIVE ENGINEERING When it becomes necessary to bleed off a brakethat is set with a plain triple drain the auxiliary beforeclosing the cut-out cock, for, when cut out, the posi-tion of the passage is changed so that the air in thebrake cylinder cannot escape through the tripleexhaust. With the new plain triple, Fig. 233, the cut-out cockis on the pipe leading from the triple to the brakecylinder. By this arrangement it is possible to keepthe driver brakes temporarily set on descendingmountain grades, until the auxiliary
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlocomot, bookyear1916
