File:The Street railway journal (1906) (14758853105).jpg: Difference between revisions

Identifier:streetrailwayj271906newy (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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Eighteen-inch ears are employed on the straight, and 30-in.and 33-in. ears on curves. The sectional insulators are of thestraight under-running air-gap pattern, and are capable ofstanding a strain of 4000 lbs. The span wires are of 7/12sS. W. G. galvanized steel, with a breaking strain of not lessthan 4000 lbs. Duplicate insulation is employed throughout.The insulator bolts are V4 in. in diameter, and both insulatorsand Brooklyn strains are capable of withstanding a strain of6000 lbs. The guard wires are of 7/16s S. W. G. galvanized steel,with a breaking strain of 2500 lbs. Guard wiring, however,has been reduced to a minimum, as the corporation, on the ad-
Text Appearing After Image:
CENTRE POLE PULL OFF POLESrfl Itg Journal r-Vi > (i j / : rtPP^ il V ft 1 -1 - J tiz \ J =j \ ^—t=j—- 1 U TYPES OF POLES ON THE BELFAST TRAMWAYS SECTION AND FEEDER PILLAR copper, 0.4 in. in diameter, with a breaking strain of 24 tons vice of Mr. McCowen, has required the telephone company toper square inch. It is double throughout, and is fixed at a put all its telephone wires on tramway routes underground.

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