Electrical control system for pneumatic brakes

Details Electrical control system for pneumatic brakes Electrical control system for pneumatic brakes

1975-02-10

1976-07-20

Kunin, Stephen G.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

188195, 303 3, 303 15, 303 20, B60T 820

Patent

active

039703487

ABSTRACT:
A brake control valve apparatus is proposed for the respective cars of a train controlled from one end or the other to be braked by an analogue signal of variable mark-to-space form which operates on each car to gate bursts of train-wire carried a.c. supply which after rectification are used to regulate the brake pressure via an E.P. converter. Additionally in order to enable release of a braked car which fails to release its brake in a tunnel, a train brake release wire is provided which in one example operates in an energized-to-release mode to release a single failed brake or in another example operates in a de-energized to release mode to connect local supplies to operate dump valves on all the brake actuators of the train so providing total release in addition to the normal release by the control valve.

REFERENCES:
patent: 3398815 (1968-08-01), Brath et al.
patent: 3606484 (1971-09-01), Dressler, Jr.
patent: 3606490 (1971-09-01), Ando
patent: 3810681 (1974-05-01), Matty

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