| 31. | Murdoch also made innovations to the steam engine, including the sun and planet gear and D slide valve.
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| 32. | The slide valve is controlled by a fixed crank on the crankshaft . The engine is not reversible.
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| 33. | The power cylinders were however mounted inside the frames and the Bagnall-Price valvgear and slide valves mounted outside.
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| 34. | References to a Clerk engine with slide valve may refer to the earlier experiments with a Lenoir type engine.
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| 35. | The cylinders and slide valve faces were lubricated by tallow cups, attached to the sides of the cylinder assembly.
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| 36. | The engine used Richardson slide valves, arranged above the cylinders and actuated by the Stephenson motion and rocker shafts.
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| 37. | They had flat Murdoch's D slide valves which were actuated by Stephenson valve gear, arranged outside the plate frames.
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| 38. | The pipeline's disabled segment has been closed off by slide valves but there is a danger of more leaks.
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| 39. | Their cylinders and slide valve faces were lubricated by tallow cups, attached to the sides of the cylinder assemblies.
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| 40. | The engine valvegear was simple, compared to Eccentrics on this shaft actuated a transverse slide valve for each cylinder.
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