. Locomotive engineering : a practical journal of railway motive power and rolling stock . ready to help herback on the track, but she backed righton without any assistance. The boys saythat is a very good augury for the Presi-dent of the United States. / / / 318 LOCOMOTIVE ENGINEERING. May, i8 St«el Eccentrics on the Erie. The time-honored practice of makingeccentrics and straps of cast iron hasgiven way to cast steel on the Erie Rail-road, and this is a fact worthy of note;but the design of the wearing surfaces inorder to utihze the strength of that ma-terial and at the same time avoid its w
. Locomotive engineering : a practical journal of railway motive power and rolling stock . ready to help herback on the track, but she backed righton without any assistance. The boys saythat is a very good augury for the Presi-dent of the United States. / / / 318 LOCOMOTIVE ENGINEERING. May, i8 St«el Eccentrics on the Erie. The time-honored practice of makingeccentrics and straps of cast iron hasgiven way to cast steel on the Erie Rail-road, and this is a fact worthy of note;but the design of the wearing surfaces inorder to utihze the strength of that ma-terial and at the same time avoid its well-known propensity for cutting and seizurewhen two surfaces are in frictional con- struction is to receive between the flangesa Magnus metal ring, 9-16 inch thick and2^ inches wide, which is sawed trans-versely into three equal parts. The ringis turned and bored to a free fit, and istherefore loose when between the eccen-tric and strap. There are three J^-inchoil holes in each section of the ring to in-sure good lubrication, and divide up thefrictional resistance over the inner and. Locomotiie EttgineerinQ STBBL ECCENTRICS ON THE ERIE. tact, is what it is particularly desired toshow in our illustration, from drawingskindly furnished by Superintendent ofMotive Power Mitchell. In section, the wearing parts of theeccentric and strap are exactly similar,both having a depressed surface at thecenter, with flanges at the sides; the strapbeing in this respect of practically thesame shape as when made to fit a tongueon the eccentrc. The object of this con- outer surface, thus giving four bearingparts to take the wear instead of two asby the cast-iron method. We are awarethat interposition of soft metal betweenthese parts has long been the practice onforeign roads, and to some extent in thiscountry. This design, however, whethernew or old. seems, from the results ob-tained to be in many respects an im-provement on existing eccentric prac-tice. Fads and Fancies.—No. 5. This months ch
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