Penalty brake application nullification-prevention system

Fluid-pressure and analogous brake systems – Exterior control

Patent

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Details

303 86, B60T 716, B60T 718

Patent

active

044913729

ABSTRACT:
A penalty brake application nullification-prevention system for a railroad train in which a bypass circuit is arranged in one embodiment to vent control pressure from the brake pipe cut-off valve of the locomotive brake valve, in order to prevent the engineman form improperly cutting out the brake valve to nullify a penalty brake application, by operating the brake valve cut-out selector valve. In this arrangement, the bypass circuit operates in response to operation of the penalty application valve when an unsafe operating condition of the train arises. In another embodiment, the bypass circuit is arranged to vent brake pipe pressure in parallel with the brake valve, so that, in the event the brake valve cut-out selector valve is improperly operated to nullify a penalty brake application, the penalty application will be initiated by a brake pipe reduction via the bypass circuit.

REFERENCES:
patent: 2860928 (1958-11-01), Gorman
patent: 2958561 (1960-11-01), May

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