. Operation of trains and station work and telegraphy . in crystallization of thewire if accompanied by vi-bration, is overcome. In each heater there aretwo resistance coils placed,one above the other. Theupper coil is of greater re-sistance and consumes lesscurrent than the coverings of lead wiresto the two coils are differentcolors, and thus may beeasily distinguished. Thetop coils of all the heatersin the car are in series, andthe bottom coils of all theheaters are in series. Thus,wherever current is used,kjg heat is given out the full^ length of the casing ofgo every heater in th
. Operation of trains and station work and telegraphy . in crystallization of thewire if accompanied by vi-bration, is overcome. In each heater there aretwo resistance coils placed,one above the other. Theupper coil is of greater re-sistance and consumes lesscurrent than the coverings of lead wiresto the two coils are differentcolors, and thus may beeasily distinguished. Thetop coils of all the heatersin the car are in series, andthe bottom coils of all theheaters are in series. Thus,wherever current is used,kjg heat is given out the full^ length of the casing ofgo every heater in the car. At#g the same time this- methodfep of wiring is said to be thesimplest and most econom-ical in time of equippingand material used. All thistype of heaters are said tosecure convenience, sim-plicity and durability. A coil for heater, show-ing resistance coil, porcelainbushings, end plates andlead fires is shown in Figure 40. Wh3 HEATING AND LIGHTING CARS 117.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadtrains, booky
