. The railroad and engineering journal . Fig 398. ^ Fig 399. ^H_@^^^ ^:e ^P Fig. 400. 387, is connected by a pipe, 39 39, with tiie discharge pott of ihetriple-valve 12. An enlarged section of this valve is shown byfig- 392. 5 is the valve which opens and closes the passage orpipe i> b. The valve has a weight. 3, which presses it pressure of about 15 lbs. in the pipe h b is sufficient to raisethis weight and allow the air to escape at the opening c. 4 4 isa three-way cock which, in the position shown—with the handlehorizontal—closes the opening c?, so that the air can escape onlyunde
. The railroad and engineering journal . Fig 398. ^ Fig 399. ^H_@^^^ ^:e ^P Fig. 400. 387, is connected by a pipe, 39 39, with tiie discharge pott of ihetriple-valve 12. An enlarged section of this valve is shown byfig- 392. 5 is the valve which opens and closes the passage orpipe i> b. The valve has a weight. 3, which presses it pressure of about 15 lbs. in the pipe h b is sufficient to raisethis weight and allow the air to escape at the opening c. 4 4 isa three-way cock which, in the position shown—with the handlehorizontal—closes the opening c?, so that the air can escape onlyunder the valve 5 and opening c. As the valve is weighted noair can escape until its pressure is sufficient to raise the weight3. Consequently, if the handle of the cock is turned to a hori- zontal position in descending long grades, a pressure of about15 lbs. is retained in the brake cylinder, which keeps the trainunder control when otherwise the brakes would be leleased torecharge the reservoirs. On slight grades or a level the handleof the cock should b
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
