International Library of Technology · Scranton, International Textbook Co. · leaf 486
carries main-reservoir pressure. The chamber on the left ofpiston / always carries auxiliary pressure. If the pressurein M exceeds that in R, p is forced to the left, as shown inthe figure. In this position, air from J-/leaks through grooveg and stores R until M and R are at the same pressure.To… … Fig. 67. the auxiliary reservoir, thereby moving piston/ to the right,uncovering the pipe leading to B, and opening up communi-cation between R and B; this forces down piston/^ and setsthe brake. To release the brake, the motorman, by meansof his operating valve, reestablishes communication…
Electrical engineering
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