E - Fixed Constructions – 01 – B
Patent
E - Fixed Constructions
01
B
E01B 7/00 (2006.01)
Patent
CA 2171633
An improved geometry for a split switch turnout with a compound point rail (41) leading to a curved closure rail (42) that is linear and tangent through the switch frog (44). The switch point rail (41) includes a proximal curved portion (47) having the same radius as the closure rail (42), and a distal end portion (46) that is linear and tangent to the proximal portion (47). The linear distal end portion (46) of the point rail (41) provides an entry angle of the switch point that is the same as the angle of attack of the wheel truck encountering the turnout, and also provides the shortest possible switch point length and the greatest possible radius of curvature of the closure rail (42). The angle of attack and the curvature of the closure rail (42) can be optimized to produce a split switch turnout that permits high speed through the turnout while minimizing wear and maintenance costs.
Aiguillage de jonction à géométrie améliorée dont le rail d'aiguille à géométrie évolutive (41) aboutit à un rail de raccord courbe (42) linéaire, et tangent au coeur de croisement (44). Le rail d'aiguille (41) comporte une partie proximale courbe (47) de même rayon que le rail de raccord (42) et une partie distale (46) linéaire, tangente à la portion proximale (47). La partie linéaire distale (46) du rail d'aiguille (41) présente un angle d'entrée égal à celui de l'angle d'attaque du bogie abordant l'aiguillage d'où résulte une aiguille de longueur minimale et un rail de raccord (42) de rayon maximal. On peut par ailleurs optimiser l'angle d'attaque et la courbure du rail de raccord (42) de façon à produire un aiguillage d'évitement franchissable à haute vitesse, à usure et frais d'entretien réduits.
Fetherstonhaugh & Co.
Willow Robert E.
LandOfFree
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