. The Street railway journal . e as is found in engines of smallerconstruction. Before placing the shaft in its bearings,the generator hub and cranks were forced thereon by aportable hydraulic press, which had a capacity of 500 tonspressure. About 350 tons pressure was used for the bed-plate of the engine is held to the foundation by atype of stay-bolt which is threaded at each end and reachesfrom the bottom of the foundation to the top, a distance ofsome23feet. Thelower end of the bolt is received by a largenut in a cast-iron receptacle buried in the concrete founda-tion, and during t
. The Street railway journal . e as is found in engines of smallerconstruction. Before placing the shaft in its bearings,the generator hub and cranks were forced thereon by aportable hydraulic press, which had a capacity of 500 tonspressure. About 350 tons pressure was used for the bed-plate of the engine is held to the foundation by atype of stay-bolt which is threaded at each end and reachesfrom the bottom of the foundation to the top, a distance ofsome23feet. Thelower end of the bolt is received by a largenut in a cast-iron receptacle buried in the concrete founda-tion, and during the building of the power station, after thefoundations had been constructed, the ends of the tubeswhich were to receive the bolts were closed by the insertionof a wooden plug. This prevented any foreign materialfrom falling into the end of the tube and interfering with n6 STREET RAILWAY JOURNAL. [Vol. XIX. No. 5. the engaging of the lower thread of the bolt with the threadin the foundation nut. The upper end of the bolt, after. HUB WITH TEMPORARY SPOKES FOR RIM passing through the engine bed, was supplied with awasher and hexagonal nut in the usual manner. The low-pressure cylinders are not truly vertical, buttheir center lines slope inward toward the top. The pecu- center, which has been carefully calculated, and for whichallowance has been made. This forcing down of the centralportion makes tulcrums of thejournal boxes and gives an upwarddirection to the ends of the shaft,causing the cranks to revolve in aplane slightly out of perpendicularwith the horizontal plane uponwhich the high-pressure cylindersare set up. If the impulses fromthe low-pressure pistons were re-ceived in a true vertical direction,therefore, a large amount of unduewear would result at the accompanying sketch showsthe amounts that the central linesof the engine were displaced fromthe vertical. Assuming the heightof the engines above shaft centerto be 30 ft., this makes the centerlines of cylind
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
