. Railway organization and management . ounds peryard, supported at intervals of eleven feet by cast-iron goose-neck pedestals, which are fastened each by three three-quarter-inch lagscrews to a long track tie. A two-piece porcelain insula-tor block, molded so as to sun-ound completely the upper headand the web of the rail, is clamped in the pedestal and supportsthe rail. These insulators are six inches long, projecting oneand one-half inches on either side of the pedestal, which is threeinches wide; a forged strap, fitting over the block, holds it inplace in the pedestal. Between insulators t
. Railway organization and management . ounds peryard, supported at intervals of eleven feet by cast-iron goose-neck pedestals, which are fastened each by three three-quarter-inch lagscrews to a long track tie. A two-piece porcelain insula-tor block, molded so as to sun-ound completely the upper headand the web of the rail, is clamped in the pedestal and supportsthe rail. These insulators are six inches long, projecting oneand one-half inches on either side of the pedestal, which is threeinches wide; a forged strap, fitting over the block, holds it inplace in the pedestal. Between insulators the rail is surroundedby a built-up wooden sheathing, whose cross section is similar tothat of the insulator. Thus the live rail is protected along itsentire length, leaving only the lower head of the rail projectingfrom the insulating sheath. Protection against interruption ofservice by sleet, ice, and snow has been aimed at in this designas well as protection to persons. y.— Z4^lv Gaije Une of Tnrck fkil ISE. f Runnina Rail of Track. Details of K--ei--•>!EndofTie Pedestal and Insulator Lm^ f^\i w, r«yleaf \-^^-^^ Insulator-.^ Jointcf Thirdfkif;tliownne^m^^ ^ K) Ilo- ■>!<■—- {llb-^ NEWS. 70IhConfaof-fkil -l^dNails Spaced8 Insulator Details of Pro+iection Sheathing. Fig. 4.—Cross Section through the Standard Four-Track Railway At some special locations an overhead conductor is used inplace of the third rail. In approaching such sections an auto- ENGINEERING 59 on the motor-car or locomotive depresses the con-tact shoes away from the third rail and lifts the overheadcontact arm into place. The trackwork and third rail installa-tion were done by the company forces. The changes in trackage and structures include, beside com-plete four-tracking in the Electric Zone and installation ofconductor rail, many improvements in alignment, the construc-tion of interchange yards and repair shops at the terminals ofthe Electric Zone, the elimination
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherchicagolasalleexte
