. Electric railway journal . tal reduction in effectiveness 12y2 per , not only is the effective coal supply not beingincreased this year, but more than 600,000 carloads ofash are being added to the present burden of trans-portation. The actual decrease in effective coal is about 30,000,-000 tons which, added to the estimated increased needsof 100,000,000 tons, makes a deficiency equivalent to130,000,000 tons. It is necessary that this be made upby good engineering and true fuel conservation in theboiler room. Hard Bronze Trolley Wheels withTwo-Piece Bushings BY R. A. WILLSON General
. Electric railway journal . tal reduction in effectiveness 12y2 per , not only is the effective coal supply not beingincreased this year, but more than 600,000 carloads ofash are being added to the present burden of trans-portation. The actual decrease in effective coal is about 30,000,-000 tons which, added to the estimated increased needsof 100,000,000 tons, makes a deficiency equivalent to130,000,000 tons. It is necessary that this be made upby good engineering and true fuel conservation in theboiler room. Hard Bronze Trolley Wheels withTwo-Piece Bushings BY R. A. WILLSON General Superintendent Washington Water Power Company,Spokane, Wash. Hard bronze trolley wheels are used by this com-pany, and they are cast and finished in the shop. Thecity wheel weighs about 3 lb., and costs us 80 cents,the interurban wheel weighs 4% lb., and costs us $,these figures being based on before-the-war prices. The composition of the bronze is 79 per cent copper,8 per cent tin, 8 per cent lead, and 5 per cent DETAILS OF HOME-MADE TROLLEYWHEELS, AND AIR-BRAKE CYL-INDER CONVERTED INTOTROLLEY WHEEL PRESS At present each melt consists of 130 lb. of scrap brass,20 lb. of copper, 2 lb. of tin, 2 lb. of lead and 1 lb. ofzinc. After being cast the wheels are taken to the ma-chine shop and turned in a turret lathe. The wheel isheld in a special chuck which supports the outside of thecasting while the cut is being made with a tool of high-grade steel. After being turned the wheels are placed on a home-made press, illustrated above, and the bushings arepressed in. The bushings for the city wheels are % diameter and % in ling. As shown in the drawingstwo bushings are used for each wheel and betweenthem in the oil reservoir is placed a felt filler whichfeeds the oil from the reservoir to the pins. Thismethod of lubrication has eliminated any trouble December 15, 1917] ELECTRIC RAILWAY JOURNAL 1083 with the pins as shown by the fact that when thewheel is worn out the b
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