| 摘要 |
In a railway truck wherein friction shoes are operatively carried in wedge-shaped pockets of the bolster and are urged upwardly and outwardly by one or more control springs positioned between the bottom of the friction shoes and the tension member of the truck side frame, the invention provides for a bolster wherein the outer portion of an inclined bolster wall that extends above the plane of the bolster top wall is connected to the top wall by an integrally cast hood. Such an arrangement thereby encloses the entire bolster pocket except at the bottom of each pocket and the side of the pockets adjacent the vertical columns of the side frame. This improved construction greatly increases the strength of that portion of the inclined wall that extends to the vertical bolster side wall and above the bolster top wall.
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