. The Street railway journal . PASSENGER MOTOR CAR one running speed only. It has been found, however, that theuse of the accelerated-service speed point is the one with no re-sistance in the armature circuit, and with shunted field is inad-visable in practice, and it is very seldom employed. The re-versal of motors is obtained by simply, reversing the armaturein the ordinary way. The resistances used for control werefirst made with wire coils, but were replaced later by packed-card resistances, similar to the American types. These re-sistances are not used for braking, as in some mountain in-
. The Street railway journal . PASSENGER MOTOR CAR one running speed only. It has been found, however, that theuse of the accelerated-service speed point is the one with no re-sistance in the armature circuit, and with shunted field is inad-visable in practice, and it is very seldom employed. The re-versal of motors is obtained by simply, reversing the armaturein the ordinary way. The resistances used for control werefirst made with wire coils, but were replaced later by packed-card resistances, similar to the American types. These re-sistances are not used for braking, as in some mountain in-stallations in Switzerland. The Paris-Lyons-Mediterranean Railroad system of pneu-matic control itself would offer a very interesting study, but itdeserves to be treated in more detail than is possible in this ar-ticle. Briefly, it consists of moving the several controllers bypneumatic impulses from a train pipe operated from the mo-tormans cab. As in most installations of this character the brakes may be. TRLICK OF MOTOR CAR operated by compressed air or by hand. Each is air is normally employed with the wheel brakes,and exceptionally with the central rail brake. The regulationsprovide that this brake is to be used only on down grades ex-ceeding 8 per cent. The cars are heated electrically by means of de Guise electric 214 heaters, which are somewhat similar to the American Goldheaters. The electric lamps are supplied with current at 330volts. This tension is held fairly constant by resistances, whichare regulated by means of a small motor arranged in a similarmanner to the current checking device in the Chavants station,described above. Ten incandescent lamps of 16 c. p. each areused on each car. Each head motor car carries an electrically-driven compressor, which furnishes air for the train, for thebrakes and also for the pneumatic control. It is of the Christen-sen type. The accelerating current during maxium load amounts toabout 180 amps, per car. Th
Size: 1836px × 1361px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
