. Railway mechanical engineer . spans usually do notexceed 85 yd. in length. For such spans it is cheaper in first costto employ wood poles which require no after exceptional conditions, such as in Cornwall, longer spanscan be used and steel poles can then undoubtedly be employedwith advantage. Steel poles should not be employed in smokeand fume-laden districts without the most careful investigation,because experience with them on tramway and railway systemshas shown that their rate of deterioration is rapid, and the costof maintenance in painting, is high.—The RngincC
. Railway mechanical engineer . spans usually do notexceed 85 yd. in length. For such spans it is cheaper in first costto employ wood poles which require no after exceptional conditions, such as in Cornwall, longer spanscan be used and steel poles can then undoubtedly be employedwith advantage. Steel poles should not be employed in smokeand fume-laden districts without the most careful investigation,because experience with them on tramway and railway systemshas shown that their rate of deterioration is rapid, and the costof maintenance in painting, is high.—The RngincC \j\i RAILWAY AGE GAZRTll:, MECHANICAL EUITION 187 TURRET HEAD FOR PLANING GUIDES,SHOES AND WEDGES Machine Shop F. BY B. O. YEARWOOD reman, Viriiinian Kailway. W. Va. The planer turret head shown in the illustration was de-signed by the writer and applied to a Detriek & Harvey 42in. by 20 ft. oiien-sidc planer for use in finishing guide bars,:inil lji>th the ins:,lr ;iiid oiitsidr r,f ^ .-ind wedkes al one. rret Head Set fo shing the of Shoe setting. The saddle on the crossrail is of tlic standard patternand the only change required for the application of the tur-ret head was the insertion of a central stud in the verticalslide, about which the turret head revolves. The turret hasfour arms, three of wliich are each |)rovided with a single
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
