. Electrical world. 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 wi
. Electrical world. 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. ^.•Jvn. -•>aB»tCTj3S<a!a*BMi^JTJ--f«g^^ j:*l!M;»tagy^te FIG. 5.—current-collecting DEVICE. springs, but free to move a considerable distance up and are all connected at their lower ends by one flat chain belt,about 5/^ in. wide, which is kept parallel to the track at a distanceof approximately fi in. by the springs and tongues referred to. Inorder to have a continuous supply of current, the belt is madelonger than the distance between any two studs. As the car comesover each stud, both the flexible chain belt and the sliding plungerare attracted downwards, and the former, on coming in contact withthe stud, completes the electric circuit. In case the stud shouldremain alive after the chain belt has passed it, the supply is inter-rupted by means of chains fixed to the end of the car and trailingon the track, coming in contact with the live stud and causing amaximum cut-out on the car to operate.—Lond. Elec, January 8. Electric Traction on Trunk Railroads.—N
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
