File:Electric railway journal (1909) (14575104489).jpg

Identifier: electricrailway331909newy (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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leyHarp for the Elevated Service TROLLEY HARPS, WHEELS AND SHOES The company is now making its own trolley harps forboth the surface and elevated lines, in accordance with theconstruction details shown in Figs. 5 and 6. The newsurface harp can take either a 4^-in. or 5-in. diameter wheel. The special variations from the older design arethe widening of the top to reduce the wear of the wheel onthe contact shunts and the dishing of the harp as shown insection aa of Fig. 5. This dishing brings the harp soclose to the wheel that there is little danger of the trolleywire cutting in between the wheel and the harp. Theelevated harp was altered by extending the hub and placinglongitudinally the cotter hole, which was formerly trans-verse to the prong of the harp. The latter change preventsthe burning of the cotter pin when the trolley harp andwheel are being replaced on the wire. The trolley wheel question is still a very active one, asmay be judged from the fact that during 1908 some 20 dif-
Text Appearing After Image:
bushing 1 Make From Std. « liffO,D.-lJ.D. Seamless Brass ripe Plug Drawn Bronze Tubing Electric liu. Journal Fig. 7—Brooklyn Power Equipment—Details of StandardTrolley Wheel for Elevated Service ferent kinds of wheel were under test. The accompanyingcurve sheet, Fig. 7, shows the considerable variations incost per 1000 car-miles of steel and composition wheels.The latest wheel adopted is 4^ in. in diameter and weighs1^4 lb. It has been in service only a few months, so thatit is not yet possible to state whether it is likely to becomethe standard. ACTUAL COSTS OF WHEELS AND BUSHINGS (NEW MATERIAL ONLY I Compositiou 60 s ee T rol Wheels 1— Wheels i Present VI heels 1 1 1 1 J J r r _ — ® - — If 9 -3 3 E. « -i 3 5T o S != -13 n, S ° ~ B> So K i ; ^ < i < S - ? f 1907 190S IOOO Flertric Bu. Jonrml Fig. 8—Brooklyn Power Equipment—Passenger SurfaceTrolley Wheel Costs on Mileage Basis A feature of the elevated trolley wheel, which is shownin Fig. 8, is the oil well

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