. Digest ferroviario. E frena quando la vettura è caricata,le molle essendo nel loro punto sensibile, danno prontamente quando le scarpe sono applicate, così liberando le ruote della spinta ter-rifica che ricevono quando la vettura è vuota; e poiché i brake-hoe, le leve e le aste fanno un solido collegamento tra il corpo delle ruote, le ruote sono ancora ulteriormente gravate dalle vibrazioniche sono allestite e che naturalmente trovano la loro strada al terreno, attraverso le ruote. Un'automobile pressata che tetto Railroad Gazette. 20 dicembre 1901, pag. 872.in due numeri recenti della Gazzetta (settembre 27 e 22 novembre)l'acciaio pressato carli
1548 x 1613 px | 26,2 x 27,3 cm | 10,3 x 10,8 inches | 150dpi
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. Railroad digest . e brakes when the car is loaded, the springs being at their sensitive point, give readily whenthe shoes are applied, thereby relieving the wheels of the ter-rific thrust they receive when the car is empty ; and as the brakeshoes, levers, and rods make a solid connection between wheelsand body, the wheels are still further burdened by the vibrationsthat are set up and which naturally find their way to theground, through the wheels. A Pressed Steel Car Roof Railroad Gazette. Dec. 20, 1901, p. 872.In two recent issues of the Gazette (Sept. 27 and Nov. 22)the pressed steel carline designed by Mr. B. Haskell, Super-intendent of Motive Power of the Pere Marquette, was illus-trated. It was shown that with given inside dimensions of boxcars the height of the car at the eaves is reduced 2 in. byusing carlines of pressed steel. Now Mr. G. B. Maltby, drafts-man in Jlr. Haskells office, with a similar object in view, hasdesigned and patented a pressed steel car roof which elimin-ates the carlines.. The roof consists of sections of 1-S-in. steel the width ofthe car and pressed so as to give the required stiffness. Theform of the overlapping joint between adjacent sheets is shownin detail, as is also the method of fastening the roof to Ihewooden side plates. At the middle of each section the sheet ispressed into an inverted U which projects above the roof sur-face and takes the place of the ordinary carline. A woodenstrip is fitted into this projection from below to which theceiling is nailed. As this projecting ridge gradually increasesin depth from the eaves to the middle of the car the diagonalprojections are made to decrease in depth toward the middle, so that each section of roof can be made from a rectangularplate. The steel plates are turned down at the eaves so as tocover the siding and take the place of the facia boards. It isapparent that with given outside dimensions, the pressed steelroof permits of a considerable increase over the usual widthand hei
