. American engineer and railroad journal . 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 s
. American engineer and railroad journal . 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. Diagram showing Loads on Lever System. Steels wherever a pivot contact is made and means are providedfor maintaining an independent alignment of each knife pads are also provided on all levers with faces ma-chined in the same plane with the neutral axis. A maximum load of about 4,000 lbs. is provided for each linealinch of knife edge at any point. All of the friction as well ascontact points throughout the scale are made of a special mix-ture of vanadium steel which, it is believed, will be less sus-ceptible to corrosion and will give a longer life. Probably the most radical departure from the usual torm ofconstruction is the introduction of relieving gear, which takesthe place of the usual rigid dead rail system with supportingcolumns that practically fill the vault and prevent proper in-spection and maintenance of the bearings. It also eliminatesthe approach and switches at either end. This relieving gear
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
