. Electric railway review . Is considerably lighter than the regulartype-C brake of the same gear ratio of which it is a modifica-tion. The brake has been on the market less than a month. TITAN GEARS. The material composing the Titan gears manufactured bythe Atha Steel Casting Company, of Newark, N. J., is so hard that it cannot be cut by anytool steel yet-known. Allfinished surfaces, such asteeth and hub-fit, are ac-curately ground to tem-plates. Although the ma-terial is hard, it is notbrittle; on the contrary itis so tough that test pieceshave been bent coldthrough an angle of 180degrees wi
. Electric railway review . Is considerably lighter than the regulartype-C brake of the same gear ratio of which it is a modifica-tion. The brake has been on the market less than a month. TITAN GEARS. The material composing the Titan gears manufactured bythe Atha Steel Casting Company, of Newark, N. J., is so hard that it cannot be cut by anytool steel yet-known. Allfinished surfaces, such asteeth and hub-fit, are ac-curately ground to tem-plates. Although the ma-terial is hard, it is notbrittle; on the contrary itis so tough that test pieceshave been bent coldthrough an angle of 180degrees without showingfracture. The gear is madesolid with the teeth castin, then a special machinegrinds the periphery of theteeth to the accurate di-ameter. Another machinegrinds each tooth to themaster, while still another machine grinds out the hub-fit and faces both sides. A gray iron or soft steel hub is thenpressed in at a pressure of 35 to tons per square inch,and is bored out to the proper size for forcing on the Titan Gear. When arrangements were being made for the Louisianapurchase exposition, held in St. Louis, Mo., in 1904, a specialcommittee was appointed to consider the question of streetpaving. After an exhaustive investigation Bitulithic wasselected for Lindell boulevard, the main thoroughfare whichled to the principal entrance to the exposition. The wisdomof this special committee later was indicated by the superiorjury of awards, which granted to Bitulithic the gold medalas the nearest approach to the ideal pavement. The James-town boulevard commission also selected Bitulithic above allothers for the boulevard to the Jamestown, (Va.), expositiongrounds. A rail bond with a conductivity of two-thirds that of therail is obtained only under exceptional circumstances, but arail bond of such conductivity that the drop of potential acrosstwo feet of bonded rail is less than the drop of potentialacross two feet of solid rail would certainly seem to be theideal bond
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
