File:The street railway review (1891) (14758269194).jpg

Identifier: streetrailwayrev02amer (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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and, when finished, to the storage yards, which are on alevel with the platform of freight cars. Each wheel has a number and date cast upon it; a per-fect record being kept of each one, good or bad, as to against the work of the day. In addition, test pieces aretaken against chills, sample pieces being of same pro-portion as the wheels cast. With such close inspectionthere is necessarily a large per cent, condemned, as all thatdo not reach a fixed standard are scrapped. Great caremust be taken as to selection of metals, melting, pouringand finishing. . Wheels are made exclusively from char-coal irons made from the celebrated hematite ores whichare found in and around the City of Baltimore. Thegreat ductility and tenacity of this iron, its admirablechilling qualities, its freedom from defects, make it pecu-liarly suitable for wheels. The first chilled wheels evermade were of Baltimore iron. The high tensile strengthof the Baltimore iron is shown from the following teststaken at random:
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THE lUUNDKV—UALXIMOKE CAR WHEEL CL pattern, circumference, tread, flange and weight; as wellas name of the moulder. Street railway wheels have as-sumed so many varieties that there are now over 100 pat-terns in use. Although there are a number of small fac-tories in the country that make wheels, it is impossible forthe lesser bretheren to give the inspection, chemical anal-ysis or mechanical tests that the larger manufacturers areable to make. All wheels are carefully inspected, and when passed asto moulding, strength, etc., are measured as to circum-ference, all not coming within a fixed size, are con-demned as being either too hard or too soft, upon rimswhere they are chilled. Test pieces are made witheach draught of metal from cupola, each of same size,one being poured in sand and the other against a chill onone side. These pieces are tested transversely and recorded TENSILE STRENGTH OF BALTIMORE IRON IN PIG. 28,560 pounds per square inch. 33,320 26,180 23,086 27,370 33,000 TENSI

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