. A report on the alternating current, single phase, interurban railway line between Bloomington and Peoria . ade of 2-l/2wsteel tubes, and it is from these that the above constructionis suspended, insulated with Thomas 3,300 volt insulators. Where the line passes through a town the nine pointsuspension is used, that is, there are nine hangers instead ofthree. This is to prevent the line coming to the ground in caseof a break. There is a guy or anchor placed every one halfmile and at the entrance and leaving of all curves, in orderthat a break in the line will not go beyond this guy, whichperm
. A report on the alternating current, single phase, interurban railway line between Bloomington and Peoria . ade of 2-l/2wsteel tubes, and it is from these that the above constructionis suspended, insulated with Thomas 3,300 volt insulators. Where the line passes through a town the nine pointsuspension is used, that is, there are nine hangers instead ofthree. This is to prevent the line coming to the ground in caseof a break. There is a guy or anchor placed every one halfmile and at the entrance and leaving of all curves, in orderthat a break in the line will not go beyond this guy, whichpermanantly fastens the line at this point. Steady braces,as they are called, are also used on this line. They consistof a 2 x 6*^ wood pole with a goose neck and ear on one end,fastened to the trolley and a casting which fastens the sameto the pole on the other end. These are used on all curves tohold the trolley over the proper position and also every quartermile over the line to steady the trolley. No feeders are usedon this system as the trolley is of sufficient capacity, working t-affScretrfar/ronWre 40. Li a sSaiin Concrete 4thick11 * STABDARD POLE COBSTRUCIIOB, iOB PEORIA B10011IBGT0B ACTIOS OF TEE I1LIB0IS SYSTEM. •Figure 3Standard Fole Construction -7 as it does, at a voltage of 3,300 volts. The poles are placed 140 feet apart on the tangenttrack and 100 feet apart on all curves. These are 40 feet inlength and have a 7 inch top and are set 7 feet in the ground,in concrete. The concrete serves to give the poles a neatand true allignment and it also preserves the butt. Thecenter of the pole is set 8 feet from the center of the dimensions of the poles are shown in Figure 3. The trolley is fed from the two substations only, adescription of which will he given later. The sections of thetrolley operating on the different currents are separated bydead sections in the trolley which consists of a section ofthe regular 000 wire placed between two section unsulatorsmounte
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