File:The Street railway journal (1902) (14758546294).jpg

Identifier: streetrailwayjo201902newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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Text Appearing Before Image:
SUGGESTED SECTIONS OF THIRD RAIL AND CHANNELIRON PROTECTION mended. This section is convenient to bend and bond, andcan be easily aligned by a fish-plate on the bottom. It is advisable to use a special composition of rail, con-
Text Appearing After Image:
MOTOR CAR ON PROTECTED THIRD RAIL taining a relatively small amount of carbon and manganese,in order to obtain high electrical conductivity. The mainconsideration with steel rails for ordinary use is to obtain and the wear amounts to practically nothing. Manganeseappears to be the element most affecting the conductivity,carbon being next. The resistance of an ordinary trackrail high in carbon and manganese willoften be found to be twelve or thirteentimes that of copper for the same section. The following composition for a thirdrail is suggested as not being difficult toobtain commercially, while providing areasonably high conductivity: Per cent Carbon, not to exceed 12 Manganese, not to exceed. . . 15Phosphorus, not to exceed. ... 10Sulphur, not to exceed 05 The electrical conductivity of a thirdrail of this composition will be about 60per cent higher than that of an ordinaryrunning rail of the same cross section; thatis, a third rail of this special compositionwould weigh only 63 per

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