| 摘要 |
A pneumatic vigilance monitoring system which requires an engineer of a moving train to cycle an acknowledging valve within a predetermined time after the sounding of a warning whistle. The system includes a pair of parallel control circuits each having a first choke and reservoir and a second reservoir and choke connected to the acknowledging valve. A double check valve connects the second reservoirs to the warning whistle as well as to a piloted three-way valve which normally causes a brake application valve to release the brake and which causes the brake application to initiate a penalty brake application if the locomotive engineer fails to periodically cycle the acknowledging valve. |
