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- Point Blades
- The movable parts of the rails in a set of points, typically a pair of linked tapering rails that can be moved laterally to allow a train to pass from one line to the other.
- Point Cleaner
- Somebody employed to make sure that the pathways were clear, where the rails slid sideways as the points changed. There has always been a problem with cinders, gravel, and ballast fouling these slide paths.
- A junction of two railway lines that can be set to guide a train onto either one of two alternative routes (facing points), or allow two lines to merge into one (trailing points) depending upon your perspective. Most railways avoided facing points wherever possible, as they are accident prone. Therefore access to the goods yard at most stations was by trailing points and so trains had to ‘set back’ (ie reverse) into the yard.
- Points Lever
- A lever for actuating the changing mechanism of points.
- Points Rodding
- Guided rods which run from the actuating levers in a lever frame to the moving components in a set of points.
- Pontypool & Blaenavon Railway
- The line from Brynmawr to Blaenavon was originally built in 1866 by the Brynmawr & Blaenavon Railway and immediately leased to the LNWR, to transport coal to the Midlands. Eight years later it was extended to meet the Great Western Railway at Abersychan & Talywain. The line was closed to passenger traffic in May 1941 and to goods in June 1954, although the line remained open until 1980, transporting coal down the valley to Newport.
- Pony Truck
- One or two axles that together pivot slightly with respect to the engine. They help to bear the weight of the engine, and when placed at the front, provide useful guidance on curves.
- Poppet Valve
- A spring-loaded gas-distribution valve which consists of a mushroom-shaped device which is raised or lowered onto a seating over an opening.
- A person employed on general manual duties at and around a station, loading and unloading trains, handling luggage, freight and parcels.
- Portpatrick and Wigtownshire Joint Railway
- A single line branch from Castle Douglas (on the Glasgow and South Western branch line from Dumfries to Kirkudbright) to Stranraer and Portpatrick, jointly owned by the London and North Western, Caledonian, Glasgow and South Western and Midland Railways. Though only a twig off a branch, the line was important because Stranraer offered the short sea route to Northern Ireland (via Larne).
- Post Office Sorting Van (BR rolling stock code).
- Post Office Tender (Stowage Van) (BR rolling stock code).