. The Street railway journal . The importance ofa safety device of this kind under the conditions obtaining on high-speed interurban lines cannot be overestimated, and the expenseof installation of an absolutely sure block signal system is verysmall when compared with the probable damage claims resulting signals. The signal boxes, which are attached to the poles, havesubstantial cast-iron cases containing two colored windows, onered and one green, and the lights behind these windows are con-trolled by operating magnets. The system can be used on third railor surface-contact roads with a slight
. The Street railway journal . The importance ofa safety device of this kind under the conditions obtaining on high-speed interurban lines cannot be overestimated, and the expenseof installation of an absolutely sure block signal system is verysmall when compared with the probable damage claims resulting signals. The signal boxes, which are attached to the poles, havesubstantial cast-iron cases containing two colored windows, onered and one green, and the lights behind these windows are con-trolled by operating magnets. The system can be used on third railor surface-contact roads with a slight variation of the standardequipment furnished for overhead construction. ♦ Track and Trolley Wire Scrapers The accompanying illustrations show two ingenious devices whichhave recently been perfected by Fred. M. Root, of Kalamazoo,Mich. The Root track scraper is an ingenious device for cleaningthe track thoroughly of all dirt and obstructions. The springs aremade of oil-tempered steel, and the hand lever which is connected y. TRACK SCRAPER FOR STREET CARS to the bell crank under the front platform enables the motormanto maintain any pressure on these springs that may be desired. Theshoe of the second scraper, being just the width of the rail head,is always on the track, and even should the rail be several inchesbelow the pavement the surface is kept bright and clean under allconditions, insuring good electrical contact of the wheels with theconsequent saving in power. The crank on the shaft to which thesprings are attached is connected to the bell crank under the plat-form by a rod in the end of which are several holes to receive a setscrew so that the apparatus can be perfectly adjusted to any car. The other device is intended for cleaning trolley wires of ice andsnow in a much more efficient manner than the ordinary corru-gated wheels sometimes employed. The cuts show the rollers orknurls held against the wire when in operation and also removedfrom the wire when their use is
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
