. The Street railway journal . 19 cents per pound, andallowing 54 lbs. to a coil, the cost of material for forming acoil from new wire will be $ Taking the scrap value of copper wire at i6y2 cents, thevalue of the copper in an oldcoil will be $, but in com-paring the two processes, it isnecessary to add to this latterfigure the cost of 4 lbs. of tapeat 90 cents a pound, or $,making a total of $ as thevalue of material in a coilformed from old wire. Thisgives a balance of $ on ma-terial alone in favor of scrap-ping the old coils and buyingnew covered wire for makingnew co
. The Street railway journal . 19 cents per pound, andallowing 54 lbs. to a coil, the cost of material for forming acoil from new wire will be $ Taking the scrap value of copper wire at i6y2 cents, thevalue of the copper in an oldcoil will be $, but in com-paring the two processes, it isnecessary to add to this latterfigure the cost of 4 lbs. of tapeat 90 cents a pound, or $,making a total of $ as thevalue of material in a coilformed from old wire. Thisgives a balance of $ on ma-terial alone in favor of scrap-ping the old coils and buyingnew covered wire for makingnew coils. Of course, this cal-culation hinges entirely on therelative values of copper wirewhen new and as scrap. ARMATURE COILSThe process followed in wind-ing coils for armatures is asfollows: The coils are formed of triple-covered cotton wire onforms in the usual manner. After the coil is formed, it is bakedin the oven at a temperature of 195 degs. F., and while hot issubmerged in armalac for 2 hours, after which it is returned. HANDY AIR-GAS FURNACE, MONTREALSTREET RAILWAY SHOPS
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
