File:The Street railway journal (1904) (14575432810).jpg

Identifier: streetrailwayjo241904newy (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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ight of an a. c. car equipment is about 15 per centgreater than that of an ordinary d. c. equipment of the samecapacity, which means an increase in the total car weight ofonly about 5 per cent. The speaker stated that with 1000 volts or less on the trolley,the ordinary type of line construction can be modified so as tobe suitable for single-phase operation. Above this voltage animproved form of line equipment and construction is necessary,which finds expression in the now familiar catenary suspensionof a grooved copper trolley wire from a standard steel messen-ger cable. The latter is supported in corrugated porcelain in-sulators. The spans vary from 60 ft. to 120 ft., and every 10 ft.the trolley wire is suspended from the messenger wire by gal-vanized iron hangers. Iron stirrups protect the insulators frommechanical injury, and these support the messenger wire incase an insulator breaks. Every 1000 ft. a supplementary armis installed on the overhead system to keep the catenary struc-
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GROUP OF MEMBERS OF NEW ENGLAND STREET RAILWAY CLUB, TAKEN AT BANQUET NOV. 29 alternating current in power transmission, and referred atsome length to the attempts of European designers to buildsatisfactory alternating-current motors for railway service.Taking up the motor problem in detail, he brought out thesuperior features of the series motor as compared with the in-duction motor in railway work, and then passed to a carefuldescription of the Westinghouse single-phase compensatedseries motor as it has been developed in response to a demandfor alternating-current traction on the part of the engineeringcommunity. Full particulars of this equipment have alreadybeen printed in our pages in previous issues. From the motor,Mr. Renshaw turned to the other apparatus which forms apart of the alternating-current car equipment, and illustratedboth motors and controlling apparatus, trolley fittings, trans-former, etc., by a series of excellent stereopticon views. Thefunctions of the induction

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