Remote control brake system for a railway train

Fluid-pressure and analogous brake systems – Electric control

Patent

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Details

303 75, B60T 1368

Patent

active

040133230

ABSTRACT:
A remote control brake system for a railway train in which the caboose is equipped to receive radio signals transmitted from the locomotive indicative of a brake application initiated by the locomotive engineer. The received radio signals are interpreted and converted into control signals which operate magnet valves via which fluid pressure in an equalizing reservoir on the caboose is reduced an amount depending upon the duration of the transmitted brake application signal. The equalizing reservoir is charged in the absence of a brake application signal by the pressure in the brake pipe and serves as the control pressure for operating a self-lapping relay valve which is arranged to exhaust brake pipe pressure responsive to a reduction of pressure in the caboose equalizing reservoir. The train brake pipe pressure is thus reduced concurrently from the front and rear ends when a brake application is initiated to provide faster and better synchronized response of the train brakes. Since the train brake pipe is charged from the front end only, a pressure gradient exists during charging. This so-called false brake pipe gradient is detected by a special circuit at the locomotive to prevent a brake application signal from being transmitted to the caboose until the pressure gradient in the brake pipe equalizes, thereby preventing undesired release of a brake application by reason of the pressure gradient flowing toward the rear of the brake pipe after the brakes have applied.

REFERENCES:
patent: 3539226 (1970-11-01), Barber
patent: 3560055 (1971-02-01), Worbois
patent: 3588185 (1971-06-01), Cannon
patent: 3588186 (1971-06-01), Worbois

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