Interlocking for a railway system
AssigneeWestinghouse Brake and Signal Holdings Limited
InventorsHenry Archer Ryland, Timothy John Molloy, Mark Tremlett
Life of this patent
Estimating the term…
Abstract
An interlocking for a railway system, comprises first, control computing means (2) which commands route settings in the system and second, protection computing means (3) coupled with the first computing means (2) and which allows commands from the first computing means (2) to be brought into effect or otherwise in dependence on the state of the railway system.
Claims8
An interlocking for a railway system, comprising:
- functional computing means which commands route settings in the system in response to route setting requests;
- and
- assurance computing means coupled with the functional computing means, wherein the assurance computing means contains information concerning the signalling principles of the railway system and receives information concerning the state of the railway system and information concerning commands from the functional computing means and only allows a command from the functional computing means to be brought into effect if the current state of the railway system is such that it would be safe to do so.
An interlocking according to claim l, wherein there is at least one additional functional computing means, the additional functional computing means being coupled with a respective additional assurance computing means and means for switching operation from one of the functional and assurance computing means to the additional functional and additional assurance computing means.
Dependencies are inferred from the claim text.