. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . he J. G. Brill Company. Figs. 172and 173 show the general construction of this vestibule and itsdimensions. It conformed in outline to the front of the car, andwas provided with a hood of the Pullman type. The weight ofthis vestibule was approximately 1900 lbs., including the guideframe. TH^ TEST CAR [LOUISIANA 61^ As the general construction did not permit of a motormanstanding in the vestibule, a special bent glass front was con-structed by the Executive Committee in order to give the mot
. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . he J. G. Brill Company. Figs. 172and 173 show the general construction of this vestibule and itsdimensions. It conformed in outline to the front of the car, andwas provided with a hood of the Pullman type. The weight ofthis vestibule was approximately 1900 lbs., including the guideframe. TH^ TEST CAR [LOUISIANA 61^ As the general construction did not permit of a motormanstanding in the vestibule, a special bent glass front was con-structed by the Executive Committee in order to give the motor-man as good a view of the track as possible. A plate of doublethick window-glass was bent by a local firm to conform to theexact curvature of the front. An aperture was cut in the steelsheathing and around the edge of this was placed a strip of thickfelt. A wooden frame was sprung against the inside of thesheathing to support the glass, and, after the glass was placedagainst the felt strip, a second felt strip was placed over it, andstrips of thin steel were screwed firmly against this felt. This. Fig. 186.—Sketch Showing General Method of Mounting Chapman Double-Ball Bearings. ThisSketch Also Shows General Arrangement of the Car Body Dynamometer Lever. construction served to hold the glass in position without havingit come in contact with any hard surface. The glass wasspecially annealed to protect it from the strains which wouldbe caused by constant changes in temperature. After the vestibule was placed in position in the car, the con-tour of its surface was continued downward with sheets of thinsteel to the top of the flat car floor, to prevent currents of airfrom circulating underneath it and introducing errors into themeasurements. The parabolic wedge vestibule was produced by buildinga wooden framework out from the parabolic vestibule and cov-ering it with sheet steel, as shown in Figs. 174 and 175. Theroof was molded to conform with the general contour of the 514 EL
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Keywords: ., bookauthorlouisian, bookcentury1900, bookdecade1900, bookyear1906
