About: Gresley conjugated valve gear

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The Gresley conjugated valve gear is a valve gear for steam locomotives designed by Sir Nigel Gresley, chief mechanical engineer of the LNER, assisted by Harold Holcroft. It enables a three-cylinder locomotive to operate with only the two sets of valve gear for the outside cylinders, and derives the valve motion for the inside cylinder from them by means of levers (the "2 to 1 lever" and "equal lever"). The gear is sometimes known as the Gresley-Holcroft gear, acknowledging Holcroft's major contributions to its development.

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  • The Gresley conjugated valve gear is a valve gear for steam locomotives designed by Sir Nigel Gresley, chief mechanical engineer of the LNER, assisted by Harold Holcroft. It enables a three-cylinder locomotive to operate with only the two sets of valve gear for the outside cylinders, and derives the valve motion for the inside cylinder from them by means of levers (the "2 to 1 lever" and "equal lever"). The gear is sometimes known as the Gresley-Holcroft gear, acknowledging Holcroft's major contributions to its development. (en)
  • グレズリー式連動弁装置 (グレズリーしきうんどうべんそうち、Gresley conjugated valve gear) は蒸気機関車の弁装置の一つであり、ロンドン・アンド・ノース・イースタン鉄道 (LNER) の主任機械技師ナイジェル・グレズリー (Nigel Gresley) により (Harold Holcroft) の協力を得て設計された。これにより、三気筒蒸気機関車の中央シリンダーの弁装置を、外側二気筒の弁装置からの連動梃によって駆動できる様になった。開発にはホルクロフトの貢献が大であったことを示すため、「グレズリー-ホルクロフト弁装置」と呼ばれることもある。 (ja)
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  • The Gresley conjugated valve gear is a valve gear for steam locomotives designed by Sir Nigel Gresley, chief mechanical engineer of the LNER, assisted by Harold Holcroft. It enables a three-cylinder locomotive to operate with only the two sets of valve gear for the outside cylinders, and derives the valve motion for the inside cylinder from them by means of levers (the "2 to 1 lever" and "equal lever"). The gear is sometimes known as the Gresley-Holcroft gear, acknowledging Holcroft's major contributions to its development. (en)
  • グレズリー式連動弁装置 (グレズリーしきうんどうべんそうち、Gresley conjugated valve gear) は蒸気機関車の弁装置の一つであり、ロンドン・アンド・ノース・イースタン鉄道 (LNER) の主任機械技師ナイジェル・グレズリー (Nigel Gresley) により (Harold Holcroft) の協力を得て設計された。これにより、三気筒蒸気機関車の中央シリンダーの弁装置を、外側二気筒の弁装置からの連動梃によって駆動できる様になった。開発にはホルクロフトの貢献が大であったことを示すため、「グレズリー-ホルクロフト弁装置」と呼ばれることもある。 (ja)
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  • Gresley conjugated valve gear (en)
  • グレズリー式連動弁装置 (ja)
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