. The street railway review . can be fixed. The section is being operatednow with eight 62-kilowatt Thomson-Houston genera-tors—four on each side. The only expense for materialin the station in making the change was the cost of twosingle pole switches and 500 feet of 0000 feeder practical advantage gained has been a great improve-ment in the voltage at the down town loop, which is twomiles from the power station. The speed was formerly-slow and the light bad, but there is now evidence of verylittle drop in potential. In the course of experiments it did not take Mr. Gots-hall long to f
. The street railway review . can be fixed. The section is being operatednow with eight 62-kilowatt Thomson-Houston genera-tors—four on each side. The only expense for materialin the station in making the change was the cost of twosingle pole switches and 500 feet of 0000 feeder practical advantage gained has been a great improve-ment in the voltage at the down town loop, which is twomiles from the power station. The speed was formerly-slow and the light bad, but there is now evidence of verylittle drop in potential. In the course of experiments it did not take Mr. Gots-hall long to find out that the ordinary forms of sectioninsulator and crossing will not withstand 1,000 volts inall kinds of weather and accordingly slight modificationswere devised which served the purpose well. The formof section insulator adopted, is simply a slab of hardfibre with ten inches between contacts instead of the usualfive inches. For crossings, the ordinary swivel crossingin which the wire on the dead side runs in a groove. OVERHEAD CROSSINGS, THREE-WIRE SYSTEM, .ST. LOUIS. along the top of the hard fibre is modified by puttinga wedge of hard fibre in the opening over the centerbolt. A cap is also put over the wire after it isput in the groove so that it is enclosed in a water-tightcase the length of the crossing. Before the wedge wasput over the bolt head dirt or moisture would sometimesstrike an arc across the 3^-inch air space between wire (^laktj\aUwavif^eVm/ 11 and bolt head and a burned out crossing would crossings have ten inches of hard fibre betweenmetal contacts. Another important point is the method of tapping infrom feed wire to trolley wire. It often happens that thepositive feed wire will be on the opposite side of thestreet from the positive trolley wire. It is therefore to put any generator on either side and to do this it isonly necessary to put a double throw three pole switchin place of the usual single throw three pole generatorswitch. Throwing
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
