File:Electric railway journal (1918) (14758665852).jpg

Identifier: electricrailway521918newy (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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nks are of cast steel, ma-chined to gage. The shoe is of cast iron and is de-signed to break when it strikes an obstacle. If desiredthe shoe can be locked down in such a position thatit clears the conductor rail altogether, thus enablingthe equipment of a coach to be isolated. Shoes runabout 130,000 miles before they are worn out. The average distance between stations on the Tigreroute is li miles. The local trains make a schedulespeed of 22\ m.p.h., which can be increased to 25 m.p.h.if desired without overloading the equipment. For thisservice a two-motor equipment was adopted, each motorhaving to deal with a load of about 45 tons. The GE-235motor was selected, this motor having a one-hour rat-ing of 250 hp. The gear ratio used is 70:22. The trains are also required to make express or semi-express runs at a schedule speed of 37J m.p.h. Thiscondition is provided for by reducing the excitationof the main field by 50 per cent in one step. October 5, 1918 Put Your Dollars Into Khaki 607
Text Appearing After Image:
aayogHOMMff-70U1NOO Provision for ventilation is made in theform of a rectangular opening of 160 sq.in.at the pinion end with arrangements to takea flexible duct communicating with the in-terior of the coach. Air can be drawnthrough this duct if it is found that thereis too much dust in the air taken direct frombeneath the coach. The air entering thisopening passes to the commutator end be-tween the fields and over the surface of thearmature, returning through ducts in thecore. It is expelled through openings in theupper part of the end shields by a fan fixedon the armature shaft. Details op Power and Brake Control Automatic control is used in starting, themultiple-unit control equipment comprisingfifteen main contactors. A notching relayis used to regulate the rate of acceleration.The interlocks are mounted on spindles at theback of the contactor arms and are operatedby them. The vacuum pump and motor aremounted in a framework slung to the under-frame. The pump is a single-acting two

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