. The Street railway journal . LAYING THE TRACK The lower part of the mercury is connected with the main sourceof supply, Q, and at the upper end of the plunger is a carbon con-tact button of proper shape to engage with the button D. Oneach side of the plunger tube are two large soft iron wings, M, em- SECTION OF COMPLETED TRACK upturned ends, as shown on page 487, between which is mounteda set of electric magnets, so arranged that the central shoe willbe of north polarity, while the outside shoes are of south carried on the car the central shoe passes directly over the contact k
. The Street railway journal . LAYING THE TRACK The lower part of the mercury is connected with the main sourceof supply, Q, and at the upper end of the plunger is a carbon con-tact button of proper shape to engage with the button D. Oneach side of the plunger tube are two large soft iron wings, M, em- SECTION OF COMPLETED TRACK upturned ends, as shown on page 487, between which is mounteda set of electric magnets, so arranged that the central shoe willbe of north polarity, while the outside shoes are of south carried on the car the central shoe passes directly over the contact knob and the outsideshoes over the extremities ofthe flanged magnetic yoke inthe asphalt. The plunger willthen be attracted upward,when it will be brought intocontact with the carbon but-ton on the surface knob, andcurrent will be taken into thecars through the central shoe. After the car has passed, theplunger drops down to itsoriginal position by to the curved shape ofthe ends of the contact shoes,it is claimed
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
