. The Street railway journal . AUXILIARY RAIL LAID FOR ALARM CIRCUIT A more recent signal is that invented by Joseph Sauer andS. E. Johnson, both employees of the company. In this signal,the car wheels, in passing, depress the plunger of a track in-strument, located close beside the rail, as indicated in the ac- May 13, 1905.] STREET RAILWAY JOURNAL. 889 companying drawing and half-tone view. This plunger is heldup by a powerful spring and can only be depressed by the carwheels. The car wheels, in depressing this plunger, operate alever which pushes an armature up in a solenoid. This arma-ture
. The Street railway journal . AUXILIARY RAIL LAID FOR ALARM CIRCUIT A more recent signal is that invented by Joseph Sauer andS. E. Johnson, both employees of the company. In this signal,the car wheels, in passing, depress the plunger of a track in-strument, located close beside the rail, as indicated in the ac- May 13, 1905.] STREET RAILWAY JOURNAL. 889 companying drawing and half-tone view. This plunger is heldup by a powerful spring and can only be depressed by the carwheels. The car wheels, in depressing this plunger, operate alever which pushes an armature up in a solenoid. This arma-ture, when at the upper limit of its travel, makes contact be-tween two fingers, thus completing the circuit from the trolley. VIEW SHOWING LOCATION OF PLUNGER ALONGSIDEOF RAIL or third rail through the solenoid coil. The coil thus being en-ergized, holds the plunger up of itself. The same circuit passesthrough the alarm bell and bank of lamps. The alarm bell cir-cuit is broken by the passing of the car wheels over a similartrack instrument on the other side of the crossing, which mo-mentarily breaks the circuit and causes the solenoid of thetrack instrument on the other side of the crossing to let same scheme can be used with batterv current. MAIL AND EXPRESS CAR FOR INDIAN TERRITORY The mail and express car illustrated has lately been placedon the lines of the Indian Territory Traction Company. Itwas built by the American Car Company, and measures 45 ft. tudinal bars are placed on the inside. The car is lighted byincandescent lamps at intervals along the strip extending fromend to end of car at center under the roof. The interior isfinished in ash, natural, and the ceiling is of varnished carlinefini
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
