. American engineer and railroad journal . April, 1911. AMERICAN AND JOURNAL. 145 A NEW DESIGN 52-FOOT TRACK SCALE WITHMECHANICAL HUMP. KAILUCJAI). At West Biowiisvillc Junction, , tlic Pennsylvania Rail-road have recently built a new 5j-foot liacU scale which incor-porates a ninnber of important improvements and interestingdetails. With the scale has also been constructed a mechanicalhump, which, for a distance of 25 ft. from one end of the scaleplatform, can be given an inclination varying between i and 4per cent, grade as desired. This scale is provided
. American engineer and railroad journal . April, 1911. AMERICAN AND JOURNAL. 145 A NEW DESIGN 52-FOOT TRACK SCALE WITHMECHANICAL HUMP. KAILUCJAI). At West Biowiisvillc Junction, , tlic Pennsylvania Rail-road have recently built a new 5j-foot liacU scale which incor-porates a ninnber of important improvements and interestingdetails. With the scale has also been constructed a mechanicalhump, which, for a distance of 25 ft. from one end of the scaleplatform, can be given an inclination varying between i and 4per cent, grade as desired. This scale is provided with a me-chanical relieving gear, doing away with the customary deadtrack, and is arranged so that the platform is independent ofthe weighing mechanism, thus eliminating the effect of snowand ice, wind pressure, or dirt on the empty balance of the scale. It will be noticed by reference to tlie illustration that allwooden substructure has been eliminated and a most substantial. VIEW SHOWING SUBSTANTI.^L F0UND.\TI0NS. concrete foundation is provided for all parts. Tipping of theplatform and the overhang at the ends have been avoided andall vital parts of the mechanism are easily accessible. It is ofthe four-section type, since with this arrangement there are noidle connecting levers required with their additional fulcrumpoints and friction. A new type of main bearing has been em-ployed, which gives greater freedom of action to the weighingplatform and eliminates the gyration of the knife edges acrossthe face of the hardened steel. These bearings are of the sus-pension type, wherein two links, suspended from the main leverknife points, support a yoke casting bolted to the eye-beams forming the bridge tnat supports the scale rails. All of themain lever stands and extension lever stands supported fromthe four main bed plates are provided with self-compensating i; III I. M:iiii Luvurs Extuiislon Levurs Flllh Lever Sbell Levor Beam Tulal lieductlou KAL
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
