. Electric railway journal . edin Kansas City by the Bull Dog Manufacturing Com-pany, and is known as the Bull Dog trailer. The twotrailers in use by the Metropolitan company are thefirst which the new company has manufactured. The Westinghouse Electric & Manufacturing Com-pany advises that the type BR frog, described on page428 of the Electric Railway Journal for Feb. 27, isnot designed for one degree of angle only as might beinferred from the caption. The frog is designed forseveral degrees of angle. March 13, 1915] ELECTRIC RAILWAY JOURNAL 517 Oxy-Acetylene Equipment for Wide Rangeof Servic
. Electric railway journal . edin Kansas City by the Bull Dog Manufacturing Com-pany, and is known as the Bull Dog trailer. The twotrailers in use by the Metropolitan company are thefirst which the new company has manufactured. The Westinghouse Electric & Manufacturing Com-pany advises that the type BR frog, described on page428 of the Electric Railway Journal for Feb. 27, isnot designed for one degree of angle only as might beinferred from the caption. The frog is designed forseveral degrees of angle. March 13, 1915] ELECTRIC RAILWAY JOURNAL 517 Oxy-Acetylene Equipment for Wide Rangeof Service Oxy-acetylene welding and cutting equipment as-serted to possess some exclusive features has recentlybeen placed on the market by the Imperial Brass Manu-facturing Company, Chicago, 111. One of these featuresis that of thorough and uniform mixing of the twogases employed; another is the close and accurate regu-lation of both volume and velocity of the gases deliveredto the mixing chamber of the torch to maintain either. OXY-ACETYLENE CUTTING AND WELDING OUTFITS a constant fixed pressure or a wide range of successful solution of these features means theelimination of dangerous back-firing, undue consump-tion of gases and burning of tips. Before entering the mixing chamber of the torch, theoxygen, under high velocity, passes through a spiralgroove which imparts to it a whirling motion. Thewhirling motion of the oxygen causes it to mixthoroughly with the acetylene with the result that auniform mixture is obtained before the gases reach thecombustion point. A saving of oxygen is thus obtainedand an increased intensity of welding flame and greaterefficiency in cutting. The welding and cutting torches are fitted with inter-changeable tips to cover all ranges of work within thelimits of the process. The torches are very simple indesign and durable in construction, no solder being usedin their manufacture. The needle valves permit fine ad-justment and are located so tha
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