Mechanism for controlling steam flow in a reciprocating steam engine.
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The Walschaerts valve gear on a steam locomotive (a PRR E6s).
The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It can also serve as a reversing gear. It is sometimes referred to as the "motion".
The valvegear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to...
The Walschaerts valvegear is a type of valvegear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgian railway...
The Stephenson valvegear or Stephenson link or shifting link is a simple design of valvegear that was widely used throughout the world for various kinds...
The Caprotti valvegear is a type of steam engine valvegear invented in the early 1920s by Italian architect and engineer Arturo Caprotti. It uses camshafts...
Baker valvegear was the main competitor to Walschaerts valvegear for steam locomotives in the United States. Strictly speaking it was not a valvegear but...
Joy valvegear is a type of steam locomotive valvegear, designed by David Joy (3 March 1825 – 1903), Locomotive and Marine engineer, and patented (no...
between two notched sector plates. The reversing rod, which connects to the valvegear, is attached to this lever, either above or below the pivot, in such a...
Marshall valvegear may refer to: Marshall valvegear, a modified Hackworth valvegear, patented in 1879 by Marshall, Sons & Co. J. T. Marshall valvegear, any...
locomotives of the LMS Stanier Black Five type, fitted with Caprotti valvegear, in 1948; the BR Caprotti Black Fives. These were numbered 44738-57, 44686...
A poppet valve (also sometimes called mushroom valve) is a valve typically used to control the timing and quantity of petrol (gas) or vapour flow into...
Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve...
The Gresley conjugated valvegear is a valvegear for steam locomotives designed by Sir Nigel Gresley, chief mechanical engineer of the LNER, assisted...
The Hackworth valvegear is a design of valvegear used to regulate the flow of steam to the pistons in steam engines. It is a radial gear, with an actuating...
motion of intake and exhaust valves, either directly or indirectly. An earlier use of the term was for part of the valvegear in beam engines beginning in...
Early locomotives used a simple valvegear that gave full power in either forward or reverse. Soon the Stephenson valvegear allowed the driver to control...
Gab valvegear was an early form of valvegear used on steam engines. Its simplest form allowed an engine to be stopped and started. A double form, mostly...
The Baguley valvegear is a type of steam engine valvegear invented by Ernest E. Baguley, the Chief Draughtsman of the W.G. Bagnall company of locomotive...
Henry Corliss of Providence, Rhode Island. Engines fitted with Corliss valvegear offered the best thermal efficiency of any type of stationary steam engine...
Belgian mechanical engineer, best known as the inventor of the Walschaerts valvegear used in steam locomotives. He was born in Mechelen, Belgium. In 1838 he...
Trip valve mechanisms are a class of steam engine valvegear developed to improve efficiency. The trip mechanism allows the inlet valve to be closed rapidly...
valvegear was briefly popular on steam locomotives in the United States. It combines elements of the Walschaerts and Baker patterns. Southern valve gear...
such as a steam engine, the control of the valve timing is by the valvegear. In a typical piston valve arrangement, the timing of the intake and exhaust...
thermic syphons in their boilers and the controversial Bulleid chain-driven valvegear. The class members were named after the Merchant Navy shipping lines involved...
English railway and mechanical engineer known for inventing the 'Marshall valvegear' for steam locomotive use. James Marshall began his engineering career...
modified Caprotti valvegear, relatively new to British locomotive engineering and more efficient than Walschaerts or Stephenson valvegear. The Duke was...
trip valvegear while in railway locomotives a valvegear such as Caprotti is used. It was invented around 1800 by Jonathan Hornblower. His valve is in...
Pneumatic valve springs are metal bellows filled with compressed air used as an alternative to the metal wire springs used to close valves in high-speed...
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