(under subclass 131) Blocks or similar movable devices which can be placed upon or near the track for derailing such trains as disregard a signal.
(1) Note. Switches used as details in place of derailing-blocks are classified under the specific type of switch unless accompanied by operating mechanism especially adapted for actuating them as derails, in which case they are classified here.
SEE OR SEARCH CLASS
104, Railways,
262+, for devices for replacing car wheels on the rails when they have been derailed.
