File:Electrical world (1904) (14781281301).jpg

Identifier: electricalworld43newy (find matches)
Title: Electrical world
Year: 1883 (1880s)
Authors:
Subjects: Electrical engineering
Publisher: (New York McGraw-Hill Pub. Co., etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ICAL WORLD and ENGINEER. Vol. XLIII, No. i. so that all freight would be diverted to connecting steam roads, thusmaking it unnecessary for the freight service to pass over the citystreets or curves. At the Lansing end it was necessary to pass over the steam rail-way tracks of the Pere Marquette Railroad, and this necessitated theconstruction of a bridge with pile approaches. The grade, as ap-proached from the Lansing end, being 4 per cent for a distance ofabout 700 ft., and after passing over the bridge the descending gradeis 2.3 per cent for about 500 ft. At the St. Johns end there is agrade on the principal street of the town averaging about 2 percent for about 1,500 ft. OVERHEAD CONSTRUCTION. Considerable care was taken in planning a suitable insulator forcarrying the trolley wire, and Fig. I shows the construction of theannealed glass insulator used. Fig. 2 shows a typical arrangement of the straight line overheadconstruction, and it will be noticed that wood is used for the pole,
Text Appearing After Image:
cost and to invest all that was invested in such a manner that all ma-terial purchased would be utilized in case either system were adopted^and should the alternating system prove successful the additional in-vestment for a direct-current motor system need not then be in-curred. The working conductor was placed 22 ft. above the top of therails in order that trainmen, when standing upon the tops of thefreight cars going over the road, could not come in contact withthe working conductor. It was planned to operate the entire road from a single 00 trolleywire, and with one rail bonded as hereinbefore mentioned; thisamount of copper being sufficient to operate four 40-ton cars at anaverage speed of 30 m. p. h., with power house located 1P2 milesfrom one end of the line, and operating with from 6,000 volts to 10,-000 volts on the working conductor. The power house is located at one end of the line, owing to theelectric company, from which power is purchased by the railroad,having a water po

Note About Images