. Electric railway review . ontract for the grad-ing of which has already been let. a new power plant will be erected at a point more centrally located and where a betterw ater supply may be had. i in Shelbyville division is a branch leaving the presentline near Louisville and following the Shelbyville pike fora distance of -7 miles, passing through Middletown and Simp-sonvllle. The route selected for the line is thickly settled,n is planned to use either the single-phase alternating cur-rent or the 1,200-volt direct-current system for operating thisline A SIMPLE PIT JACK. The pit jack shown i
. Electric railway review . ontract for the grad-ing of which has already been let. a new power plant will be erected at a point more centrally located and where a betterw ater supply may be had. i in Shelbyville division is a branch leaving the presentline near Louisville and following the Shelbyville pike fora distance of -7 miles, passing through Middletown and Simp-sonvllle. The route selected for the line is thickly settled,n is planned to use either the single-phase alternating cur-rent or the 1,200-volt direct-current system for operating thisline A SIMPLE PIT JACK. The pit jack shown in the accompanying illustration isprobably about as simple a device as could be built forraising and lowering wheels under cars. This device, asused in the repair shop of the Hot Springs (Ark.) StreetRailroad Company, consists of two track jacks bolted toparallel timbers resting on the axles of two pairs of smallflanged wheels. The entire truck may easily be moved alonga narrow-gauge track laid in a cross pit. Thus the jack. A Simple Pit Jack. serves all the repair pits of the shop. The Barrett jacks asused have 47-inch rams so that there is considerable verticalmovement possible. When wheels are to be lowered the car is placed in posi-tion over a removable section of the repair-pit track. Theaxle is then made clear of the journal and motor bearingsand the jacks raised until the wheel flanges are clear ofthe track rails. The removable sections of the pit-trackrails are then shifted so that the jacks carrying the carwheels may be lowered until the wheels will clear the pittracks. It is then a simple process to roll the truck carry-ing the wheels, along its own track until such a position isreached where the wheels may be lifted by an overheadcrane or set upon planks across the pit and rolled onto theshop floor. January 12. 1907. ELECTRIC RAILWAY REVIEW 17 REGENERATIVE CONTROL.* 1!V A. RAWOETH. In using shunt motors for electric traction certain dif-ficulties are encountered. Thu
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
