Gif of LNWR Emblem
London & North Western Railway Society
Glossary for the LNWR Society

Glossary Results for prefix "di"

Diagram (1) A line drawing, usually representational, of the elevation of a locomotive or goods wagon, or the plan view of a passenger carriage, showing essential dimensions, carrying capacity and other features of importance to the traffic department. Usually bound into a reference book, intended for use of the company’s staff only. Often abbreviated by enthusiasts to D.xxx, referring to the type of vehicle shown on that page number in the Diagram Book.  
Diagram (2) A schedule or roster showing the planned workings of a locomotive, passenger carriage or train crew for a particular day of week.  
Diamond Crossing Where one trackExplain 'Track' crosses another at an acute angle, the crossing is colloquially known as a diamond.  
Die Block A component in the WalschaertsExplain 'Walschaerts valve-gear' valve-gear which is able to slide within the radius linkExplain 'Radius Link'; or a similar sliding device in other forms of valve gearExplain 'Valve Gear'.  
Dining Car A carriage provided for serving meals to passengers. Except for two third class cars with pantries, which were 68ft long, LNWR and WCJSExplain 'WCJS – West Coast Joint Stock' dining cars became standardised at 65ft long, like the sleeping cars; many also had a kitchen. The separate kitchen car was a post-grouping development, apart from three built for the American SpecialsExplain 'American Special (1)' in 1908. All WCJS and most LNWR cars had clerestory roofsExplain 'Clerestory Roof'. They were shown in the marshalling circularExplain 'Marshalling Circular' by the meal which would be served — Breakfast Car, Luncheon Car or Dining Car.  
Dining Saloon The legend on the waist-band of LNWR and WCJS dining carsExplain 'Dining Car' was “DINING SALOON”.  
Displacement Lubricator A displacement lubricator works by admitting steam into the oil reservoir; the steam condenses and sinks to the bottom of the oil. As the condensate gathers, the oil is forced back down the steam pipe to the valve chest, cylinders, etc. Displacement lubricators work at steam pressure, so taps are fitted so that the oil can be replenished while the loco is in steam. They were often of polished bronze.  
Disposing a Locomotive When a locomotive has completed a stint of work, it is returned to the Shed, where it is prepared for the next stint of work. Typically this would be dropping the fire (removing all the remains of the fire from the fireboxExplain 'Fire Box'), filling the water tanks, and minor maintenance work.  
Distant Signal A means of notifying the driver of a train that he is approaching a home signalExplain 'Home Signal' and, if the distant is in the ‘on’Explain 'On (Signal)' (caution) position, he should be prepared to stop at that home signal.  
Dock Tank 0-4-2T Locomotive Class See Bissell TankExplain 'Bissell Tank 0-4-2T Locomotive Class' View more details
Dog boxes Compartments, often inside a Guard’s van or beneath a seat of an ordinary carriage, in which a dog travelled. There was a small door in the lower panel which gave access and which had louvres for ventilation.  
Dome The mechanism to regulate the steam to the cylinders is often housed in a dome, above the profile of the boiler, and well clear of the water in the boilerExplain 'Boiler'. The dome is seen behind the chimneyExplain 'Chimney' and in front of the Safety valvesExplain 'Safety Valve'.  
Doubled When a single line track is extended to one track in each direction, it is said to have been “Doubled”.  
Down Line All lines have a defined “Up” or “Down” direction with regard to a major city. The down line went away from the major city or, on a branch line, away from the junction with the main line. London was usually the major city.