. Costruzione e riparazione di ferrovie . Fig. 115. Interruttore BTUB che mostra blocchi di testa e messa a terra per spostare le guide di commutazione.3 Vol. 13 226 COSTRUZIONE E RIPARAZIONE DI FERROVIE. Inghilterra dal 1830 e sta ora entrando in genero uso negli Stati Uniti. LorenzSwitch e Clarke-Jeffrey Switch sono interruttori splitswitch. Fig. 116 illustra questo stile. Il. Fig. 116. INTERRUTTORE SPLIT. Con supporto Pony Switch. - adatto per cantieri. Interruttori di terza classe progettati per scopi specialistici; protetti da brevetti e perlopiù mirano a fornire una guida continua per la linea principale. Interruttore di sicurezza migliorato per MacPhersons eFro

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. Building and repairing railways . Fig. 115. BTUB switch Showing head blocks and ground throw for moving switch rails.3 Vol. 13 226 BUILDING AND REPAIRING RAILWAYS. England since 1830 and is now coming into gen-eral use in the United States. The LorenzSwitch and the Clarke-Jeffrey Switch are splitswitches. Fig. 116 illustrates this style. The. Fig. 116. SPLIT SWITCH.With Pony Switch Stand.—Suitable for yards. third class of switches is designed for specialpurposes; are protected by patents and theymostly aim to give a continuous rail for the mainline. MacPhersons Improved Safety Switch andFrog is devised to lift the train over the rail ofthe main line without the use of a frog whenbeing switched on to a siding. This switch is inuse on some of the great railroad systems. TheWharton Switch is designed to leave the mainline rails unbroken at the switch stand, but a STANDARDS OF CONSTRUCTION. 227 frog is used where the inside rail of the sidetrack crosses the main line rail. It has been inuse for a number of years and is well known.The Duggan Switch is designed to accomplishthe same purpose as the Wharton Switch, byhaving the switch rail work in a vertical insteadof a horizontal plane. The principal objection to the stub switch isthat the pounding of the ends of the rails at thehead block by the passing wheels causes the rail

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1900
• booksubjectrailroa
• bookyear1901