File:The Street railway journal (1900) (14571755899).jpg

Identifier: streetrailwayjo161900newy (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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iven axle by side rods. TheHoadley motors on the other hand were patterned moreafter an electric motor, so far as the application of thepower was concerned. Each motor, of which there weretwo on each car, was of the compound type with shortstroke (6 ins.), and drove a shaft carrying a pinion whichin turn was geared to the car axle. The two axles werethus driven independently, the motors ran in oil, and thewhole equipment did not differ very much in external ap-pearance from an electric equipment. There were a greatmany other variations in practise between the Hardie andHoadley systems, as in the method of reheating, etc., butthose already mentioned are sufficient to characterize thetwo systems as radically different. The satisfactory results secured by the Hardie motorson the Third Avenue line, as mentioned above, convincedthe managers of the Metropolitan Street Railway Com-pany that the patents of the General Compressed Air Com-pany were essential in securing the best results in com-
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FIG. 1.—COMPRESSED AIR MOTOR CAR AND TWO TRAILERS. CLARK STREET, CHICAGO pressed air motor work. As a consequence, negotiationswere entered into by which a new company, the AmericanAir Power Company, was formed to consolidate the in-terests of the other two. The Metropolitan svndicate con-trolled the new company, and though certain modificationswere made, the general characteristics of the systems usedmi the Metropolitan line remained the same, that is, thecompound short stroke motor driving the two axles inde-pendently. Soon after the consolidation, the services ofRobert Hardie were secured by the Compressed Air MotorCompany, which was a licensee for Wisconsin and Illinoisof the General Compressed Air Company, and whosestockholders still believed in the locomotive principle, asapplied to compressed air traction. The scene of the com-petitive trial between the two systems was now transferred,the American air power motors being used in New York,while the Hardie motors were employed i

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