| 摘要 |
A penalty brake control system for a railway locomotive in which a first pressure switch controls the venting of the control chamber of a penalty brake application valve. Reset of the penalty brake application valve, following actuation in response to an unsafe operating condition, is achieved by actuating this first pressure switch to effect closure of the control chamber vent path. A second pressure switch actuates this first pressure switch only when two pressure signals are present thereat, the first pressure signal arising when the penalty brake application value is actuated and the second pressure signal arising when the locomotive brake valve handle is moved out of release position, provided the unsafe operating condition has been corrected.
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