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In total, Lentz acquired some 2000 patents. He is best known for his steam valve gear with oscillating and rotating cams to actuate poppet valves. He also developed an eponymous form of locomotive boiler, the Lentz boiler, with a corrugated tubular furnace. [4] Paxman-Lentz single-cylinder engine. Lentz died on 21 March 1944.
The cam can be seen as a device that converts rotational motion to reciprocating (or sometimes oscillating) motion. [clarification needed] [3] A common example is the camshaft of an automobile, which takes the rotary motion of the engine and converts it into the reciprocating motion necessary to operate the intake and exhaust valves of the cylinders.
The PRR's requirements were the use of the Belpaire firebox and the Franklin oscillating-cam poppet valve gear. The two, #6110 and #6111, were delivered in April and May 1942. Testing again proved them to be powerful and capable, but not sure-footed.
Deeley valve gear - fitted to several express locomotives on the Midland Railway. The combination levers were driven, as normal, from the crossheads. Each expansion link was driven from the crosshead on the opposite side of the engine. Young valve gear - used the piston rod motion on one side of the locomotive to drive the valve gear on the ...
Two T1's received different alternative forms of valve gear. 5500 was rebuilt following an accident in 1948 with Franklin Type B-2 valve gear, replacing the original oscillating cams with rotary cams. This removed the complex arrangement of gearboxes between and ahead of the cylinders, thus simplifying maintenance and improving performance.
The next six, built in 1928, were fitted with Lentz oscillating-cam poppet valves, also operated by Walschaerts valve gear for the outside cylinders and Gresley conjugated valve gear for the inside cylinder, although the components and their layout differed from the piston valve locomotives. The last two, built in 1929, also had Lentz poppet ...
Note the large eccentric gear above the first two driving wheel sets, iconic to the Type B valve. 5550 is slated to use the Franklin Type B2 rotary-cam poppet valves in place of the Type A oscillating-cam poppets due to an increased ease of maintenance and superior performance.
Bagnall–Price valve gear on an 18 in gauge Bagnall product at the Kimberley diamond mine museum, South Africa Bagnall–Price valve gear is a type of steam engine valve gear developed at locomotive manufacturer W.G. Bagnall as an alternative to the more common Walschaerts valve gear and also to supersede the Baguley valve gear their designs had previously utilised.