Vehicle braking control apparatus
AssigneeWestinghouse Brake & Signal Co. Ltd.
InventorDavid John Wickham
Life of this patent
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Abstract
A valve arrangement is provided for giving a continuous quick service facility in a triple valve controlling rail vehicle brakes in response to brake pipe pressure reductions. The arrangement comprises a pressure responsive member which responds to more than a predetermined brake pipe pressure reduction in relation to a reference pressure to operate a pulsator which discharges repetitive pulses of air from the brake pipe for as long as the pressure reduction persists.
Claims10
In fluid pressure controlled apparatus for a vehicle braking system controlled by pressures in a brake pipe, valve apparatus for improved continuous quick service operation, comprising a reference pressure signal input port and a brake pipe pressure signal input port, pressure difference sensing means for continuously sensing and responding to pressure differences between the pressure signals at said signal input ports, pulsating means operative when energized to discharge repetitive pulses of air from the brake pipe, and means responsive to sensed attainment of a predetermined pressure difference by said sensing means to effect energization of said pulsating means so long as said sensed predetermined difference continues.
Dependencies are inferred from the claim text.