File:The street railway review (1891) (14779612483).jpg

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English:

Identifier: streetrailwayrev161amer (find matches)
Title: The street railway review
Year: 1891 (1890s)
Authors: American Street Railway Association Street Railway Accountants' Association of America American Railway, Mechanical, and Electrical Association
Subjects: Street-railroads
Publisher: Chicago : Street Railway Review Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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Cl ERAL VIEW OF CATENARY C0NSTR1 CTIOK concrete to a depth of 7^ ft. The poles were guyed with Milleranchors, manufactured hy the Miller Anchor Co., Norwalk, O.These anchors stood the severe test loads in a very satisfactorymanner. The tests were made on the middle pole, which was fittedup with the improved form of catenary support. This construc- tion coresponded as nearly as possible to that to be erected forordinary operating conditions. The catenary cable was composed of %-in. extra heavy Siemenssteel strand wire covered with triple braid weather-proof insulation,giving a cable with a diameter of approximately % in. The cablewas supported by a 2-in. tubular iron bracket 12 ft. long. The cable
Text Appearing After Image:
TWO EXPOSURES ON ONE PLATE TAKEN TO SHOW THE NORMAL POSITIONOF THE POLE AND ITS POSITION UNDER A 2,050-LB. STRESS. bad a sag of 5 ft. 5 in. From this cable was suspended a No. 0000grooved trolley wire, the suspension being effected by means ofspreaders of flat steel 1 x V& in. in section, and of varying lengths.The spreaders were located 10 ft. apart. Forged mechanical earsand specially designed clamps were used at the ends of thespreaders. The catenary insulator was fastened at the outer end of thebracket, which was strengthened by a 54-in. tie rod and an underbrace. This insulator was of the well known high-tension type,about 9 in. high. 4/2 in. in diameter and tested for 80,000 voltspressure. Directly under this insulator and slipped around thebracket arm was a secondary grooved insulator designed to catchthe messenger wire in case of the breaking of the main insulator. This method of construction is the special improved feature ofwhich Mr. Morris has obtained very broad patent

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16, part 1
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27 July 2014

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