Movable thresholds and railway platform barrier doors
AssigneeWestinghouse Brake and Signal Holdings Limited
InventorsKeith William Langley, Russell Clinton Harding, Derek Tate, Mark Andrew John Hemmings
Life of this patent
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Abstract
Thresholds for bridging the gap between a platform and doorways of vehicles stopped at the platform. The thresholds are adapted to move from a retracted position to an extended position in response to the opening of barrier doors mounted alongside the platform.
Claims11
A combination of a platform having a platform edge and a threshold arrangement for bridging a gap between the platform edge and a door threshold of a vehicle stationary at the platform, wherein said arrangement comprises:
- a moveable threshold supported by the platform, the moveable threshold being provided with moving means for moving the moveable threshold to and fro between a withdrawn position in which sufficient clearance is provided for the vehicle to draw up beside the platform edge and an extended position in which the moveable threshold substantially bridges the gap between the platform edge and the vehicle door threshold;
- and control means for controlling movement of said moveable threshold via said moving means, wherein said platform has a barrier along said platform edge with a platform door in the barrier, which platform door opens when a vehicle has drawn up beside the platform edge, the moveable threshold in its extended position bridging the gap at the platform door opening, and wherein the moveable threshold is coupled for movement in conjunction with opening and closing movement of said platform door in the barrier.
A combination as claimed in 1, wherein there are a plurality of said moveable thresholds supported by the platform and said barrier has a plurality of said platform doors in it, the moveable thresholds in their extended positions bridging gaps at the platform door openings, the moveable thresholds being coupled for movement in conjunction with opening and closing movement of said platform doors in the barrier.
Dependencies are inferred from the claim text.