. The Street railway journal . FIG. 13.—CONTROLLER VIEWED FROM THE HAND-WHEELSIDE, SHOWING CHAIN AND GEARING magnetic blow-out. The main circuit switch is constructedin the same way. The trolley bows, as will be noted from the illustration,are of the rhomboidal or pantagraph type. The frameis made of steel tubing and the roller axle of crucible graphite is used for lubrication. The bows are placedon a wooden frame mounted on Ambroin insulators. Owing to the higher voltage used particular attention was. FIG. OF MAIN FIG. 15.—AUXILIARY BLOW- AND TROLLEY SWITCH OUT DEVICE g
. The Street railway journal . FIG. 13.—CONTROLLER VIEWED FROM THE HAND-WHEELSIDE, SHOWING CHAIN AND GEARING magnetic blow-out. The main circuit switch is constructedin the same way. The trolley bows, as will be noted from the illustration,are of the rhomboidal or pantagraph type. The frameis made of steel tubing and the roller axle of crucible graphite is used for lubrication. The bows are placedon a wooden frame mounted on Ambroin insulators. Owing to the higher voltage used particular attention was. FIG. OF MAIN FIG. 15.—AUXILIARY BLOW- AND TROLLEY SWITCH OUT DEVICE given to the design of the circuit breakers. When there is anoverload, the main solenoid forces up a core which pushesa small ratchet out of position. This releases a spring whichdrives down the contact pin and breaks the circuit. Thecircuit closing occurs through a copper spring between thetwo stationary contactors. In parallel with this main breakercircuit are two current-carrying fingers in contact with a pairof stationary metal horns. The circuit thus formed closesthe power circuit earlier and opens it later than the maincircuit breaker. The arc is always formed in this parallel cir- cuit and is immediately carried over to the metal horns whereit is extinguished by the two blow-out coils. The current limitis fixed by an auxiliary coil in the lower part of the circuit
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
