. Electric railway review . y a coating ^ inch thick, applied bydipping the sections into a hot compound. For the purpose of removing sand and silt from the waterpipes water jets have been installed at 10-foot intervals in thebottom of the pipes, and by a system of valves the intake anddischarge may be connected at the station end with an Allis-Chalmers motor-driven screw pump, so located as to secure aflow of from 8 to 10 feet per second through the pipes. Whenthe cleaning is to be done the jets are first operated to loosenthe deposit, which is then worked out by the flow from thepump. The pu
. Electric railway review . y a coating ^ inch thick, applied bydipping the sections into a hot compound. For the purpose of removing sand and silt from the waterpipes water jets have been installed at 10-foot intervals in thebottom of the pipes, and by a system of valves the intake anddischarge may be connected at the station end with an Allis-Chalmers motor-driven screw pump, so located as to secure aflow of from 8 to 10 feet per second through the pipes. Whenthe cleaning is to be done the jets are first operated to loosenthe deposit, which is then worked out by the flow from thepump. The pump is driven by means of a 700-horsepower550-volt induction motor directly coupled to it. Messrs. San-derson & Porter, engineers, New York City, were in chargeof the design and construction of the power station. BLAKE SIGNALS WITH OIL LIGHTS. In order to meet the requirements of single-phase electricroads and steam railroads the Blake Signal & ManufacturingCompany has developed the type of signal shown in the accom-. Blake Signals,—Semaphore Blade and Lamp in Stop and ClearPositions. pauying engravings. These signals are similar in every detailto the well-known Blake dispatchers signals for telephonetrain dispatching, now in use on many 500-volt interurban elec-tric roads, except the signal light for use after dark. On 500-volttrolley lines the most effective as well as simplest and cheap-est method of getting the light for night use is to connect the500-volt trolley or feeder to an incandescent lamp circuitthrough a certain amount of resistance, said circuit beingclosed by a substantial knife blade switch when the sema-phore is set in the horizontal position. With single-phaselines or steam railroads this comparatively low voltage elec-tric current is not available at the line signal and it becomesnecessary to devise some other means for getting the neces-sary signal light for night use. This has been accomplished by supporting a standard4-lens railway switch lamp on a subst
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
