Файл:Electric railway journal (1917) (14760826112).jpg

Identifier: electricrailway501917newy (find matches)
Title: Electric railway journal
Year: 1908 (1900s)
Authors:
Subjects: Electric railroads
Publisher: (New York) McGraw Hill Pub. Co
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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elow the ties.For pavement of the roadway adjoining the rails agilsonite asphaltic-concrete surfacing has beenadopted, vitrified bricks being installed against the railsto prevent the asphalt surface from being broken downalong the line of contact between the rail metal and thepaving. The rails weigh 90 lb. to the yard, and they are Britishstandard, grooved-girder section on tangent track. Asimilar type of rail weighing 96 lb. to the yard is usedon all curves of less than 150 ft. radius. The rail heads are curved with a radiusof 12 in. The sharpestcurves on the system areof 50 ft. radius. Oncurves of 60 ft. radius orless the inside rail is fittedwith a removable, rolledmanganese-steel flange.All rails are made of sil-icon steel, under the Sand-berg patents. For the ties nativehardwoods, i.e., red gum,iron bark and gray boxare used. All ties arehewn and they are spacedon 27-in. centers. It isexpected that the ties willhave thirty years of life. July 7, 1917) ELECTRIC RAILWAY JOURNAL 11
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NEW MELBOURNE TRAMWAY COMBINED OPEN AND CLOSED CAR No tie bars or brace plates are used, and the heaviestaxle load is not more than 8 tons. Overhead construction is of side-pole span type.Steel poles are used throughout 5 miles of the route, andnative iron-bark poles, neatly dressed, on the other 2miles of the route. Non-fouling trolley wire with me-chanical ears has been adopted. A 5000-volt, three-phase, 50-cycle current supply ispurchased from the electric supply department of theMelbourne City Council. Payment is made on a maxi-mum demand system at a price which works out to approximately 2 cents per alternating-current unit de-livered. The tramway has installed its own substation,which is equipped with two 200-kw. rotary convertersets, a 50-kw. general service power and lighting trans-former and two 10-kw. series transformers for tracklighting, the whole being controlled from a handsomeblack-slate switchboard. All the substation equipmenthas been supplied by the Australian Genera

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