. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . Fig. 189. — Detuned Sketch of Standard Vestibule. guide frame absolutely rigid. Its main purpose, however, wasto form (at its center) a point of attachment for the pressuremeasuring dynamometer. The four longitudinal timbers of theguide frame were shod at their front ends with steel strapi^which projected through holes cut in the front of the car body,and which were bolted to the vertical steel strips attached tothe back of the vestibule. The guide frame thus formed aaintegral part of the v
. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . Fig. 189. — Detuned Sketch of Standard Vestibule. guide frame absolutely rigid. Its main purpose, however, wasto form (at its center) a point of attachment for the pressuremeasuring dynamometer. The four longitudinal timbers of theguide frame were shod at their front ends with steel strapi^which projected through holes cut in the front of the car body,and which were bolted to the vertical steel strips attached tothe back of the vestibule. The guide frame thus formed aaintegral part of the vestibule equipment. The guide frame served two general purposes: first, it movedbetween guide bearings on all sides so that it held the vestibulein its proper position, and second, it counterbalanced the weight THE TEST CAR LOUISIANA* 517 I. CD 00 c ■ 518 ELECTRIC RAILWAY TEST COMMISSION of the vestibule. The guide bearings (twelve in number) wereone inch Chapman double-ball bearings, similar in general formto the larger bearings used in mounting the car body. Theywere carried in cast-iron forms upon small pieces of one-inchshafting. The bearings required special fitting for this work,as it was desired to have them bear upon the sides of the guideframe. The flanges at the ends of the hubs were turned offperfectly smooth, and the dust caps were removed. In orderto take up the shock wdiich mught be transmitted to the bear-ings from the guide frame, the bolt holes in the bearing frameswere countersunk, both above and below, and rubber washerswere fitted into the recesses thus formed. The heads of thebolts used to clamp the bearing frames to the support did not,therefore, at any point come in contact with iron. This pro-vision was effective in taking the sudden jars off the bearingsthemselves. Flat steel plates were screwed
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Keywords: ., bookauthorlouisian, bookcentury1900, bookdecade1900, bookyear1906
