. Electrical world. ce.—Guarini.—An illustrated articleon the first hydroelectric plant of Greece, at the foot of the mountainof the Muses. There are two 130-kw. 5,000-volt, three-phase alter-nators mainly for use in connection with a pumping station.— February,. Traction. Surface Contact System.—A description of the G. B. surfacecontact system, which is being used on an experimental line in Eng-land. The bare conductor, consisting of stranded galvanized ironcable, is drawn through plain stoneware pipes, and is suspended atconvenient intervals by vitrified clay insulators. Every 7 ft.
. Electrical world. ce.—Guarini.—An illustrated articleon the first hydroelectric plant of Greece, at the foot of the mountainof the Muses. There are two 130-kw. 5,000-volt, three-phase alter-nators mainly for use in connection with a pumping station.— February,. Traction. Surface Contact System.—A description of the G. B. surfacecontact system, which is being used on an experimental line in Eng-land. The bare conductor, consisting of stranded galvanized ironcable, is drawn through plain stoneware pipes, and is suspended atconvenient intervals by vitrified clay insulators. Every 7 ft. 6 in.,corresponding to the distance betw^een studs, a short vertical earth- enware tube is cemented to the main horizontal pipe, as shown inFig. 4. Into this vertical portion of the pipe system the laminatedstalk of the stud is let, the upper portion of the intervening spacebetween it and the tube being subsequently filled up with bitumen, apacking of jute yarn preventing this material from falling FIG. 4.—sections of STUD. A loosely fitting contact plunger, consisting of a laminated bodyand a carbon contact piece, slides in the brass-lined fork of thestalk. It is electrically connected to the stalk by flexible copperconductors and is held up from the cable against the force of gravityby an insulated phosphor-bronze spring. The stalk is connected tothe cast-iron stud by a somewhat flexible joint, but this does notprevent it from making good electrical and magnetic contact. Arecessed granite block receives the stud, which is level with thetrack. Each car is provided with a magnet rigidly suspended beneaththe car and a battery of accumulators which serves for startingonly, being charged during ordinary running. One pole of themagnet is in the form of two parallel iron bars, suspended at adistance of about two inches above the center of the track. Be-tween these two bars are a number of iron tongues, suspended by
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
