. Air brake text for engineers and firemen; . PLATE 64. d, above piston 4, is always subject to brake cylinder spring 11, which is adjusted by means of nut 12, pro-vides a resistance to the downward movement of piston 4, which 148 HIGH SPEED BRAKE. is finally arrested by spring box 3. Combined with piston 4 is itsstem 6, fitted with two collars, which control the movement ofslide valve 8. Slide valve 8 is provided with a triangular port b inits face, which is always in communication with chamber d (Plate64). Port a in the slide valve seat leads directly to the atmos-phere,
. Air brake text for engineers and firemen; . PLATE 64. d, above piston 4, is always subject to brake cylinder spring 11, which is adjusted by means of nut 12, pro-vides a resistance to the downward movement of piston 4, which 148 HIGH SPEED BRAKE. is finally arrested by spring box 3. Combined with piston 4 is itsstem 6, fitted with two collars, which control the movement ofslide valve 8. Slide valve 8 is provided with a triangular port b inits face, which is always in communication with chamber d (Plate64). Port a in the slide valve seat leads directly to the atmos-phere, through exhaust opening EX. Slide valve 8 and its piston 4 are shown in their normal posi-tions on Plate 64. C. PLATE 65, It will be noted that in release position port h of slide valve 8does not register with port a of its seat, so that when the brakesare applied the air pressure is retained in the brake cylinder andis subsequently released in the usual way, unless it becomes suf- HIGH SPEED BRAKE. 149 ficiently high to overcome the tension of spring 11 and forcepiston 4 downward. Service Application. When a heavy service ismade and the brake cyHnder pressure exceeds 60 pounds, thepressure upon piston 4 moves it downward until port b in the C
Size: 1505px × 1661px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1900, bookidairbraketextfore00nati
