. American engineer and railroad journal . e box girder center sills wherein the connections coupler head is connected to a Westinghouse friction draftgear by the usual yoke. This draft gear is secured within aheavy cast steel housing, the details of which are shown in This housing is carried in a frame which forms part of the center sill construction, and is supported and guided in it by aset of six circuitous ball bearings, each containing 32 hardenedsteel balls iJ4 in. in diameter. The bearings, or ball races, are-so arranged as to have 10 of these balls constantly in contact
. American engineer and railroad journal . e box girder center sills wherein the connections coupler head is connected to a Westinghouse friction draftgear by the usual yoke. This draft gear is secured within aheavy cast steel housing, the details of which are shown in This housing is carried in a frame which forms part of the center sill construction, and is supported and guided in it by aset of six circuitous ball bearings, each containing 32 hardenedsteel balls iJ4 in. in diameter. The bearings, or ball races, are-so arranged as to have 10 of these balls constantly in contactwith the housing, thus holding it in rigid alignment and prac-tically without friction. The space between the outer end of thehousing and its frame is fitted with a felt bushing. To relieve thedynamometer mechanism from all load when it is not in useprovision is made for the inserting of tapered keys between lugson the housing and its frame, so that they are rigidly held to-gether and the load is carried directly to the sills in the usual. ■ —■ : ■■■ —\—~~T: ■. \ — . (■ ■ ■ Y1 ■ T V ~~[ y Xj FIG. 9.—DYNAMOMETER CYLINDER OR MAIN PRESS—PENNSYLVANIA RAILROAD DYNAMOMETER CAR. August, 1907. AMERICAN ENGINEER AND RAILROAD JOURNAL. 297
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
