. Electric railway journal . Motor-Driven Machine for Cleaning Screens greatly by the use of a scrubbing brush which is attached tothe revolving head of the motor-driven sander and is rapidlypassed over the screen to clean the paint. This machine isdriven by a 3-2-hp motor. The Louisville (Ky.) Railway has put in service a 2-ton truckto be used in repair work to take the place of the wagons drawnby mules. The truck was purchased second-hand and the com-mercial body which surmounted it was replaced by a towerbuilt by the company. RAPID FINISHING OF TROLLEY WHEELS The Chicago Railways Company ca
. Electric railway journal . Motor-Driven Machine for Cleaning Screens greatly by the use of a scrubbing brush which is attached tothe revolving head of the motor-driven sander and is rapidlypassed over the screen to clean the paint. This machine isdriven by a 3-2-hp motor. The Louisville (Ky.) Railway has put in service a 2-ton truckto be used in repair work to take the place of the wagons drawnby mules. The truck was purchased second-hand and the com-mercial body which surmounted it was replaced by a towerbuilt by the company. RAPID FINISHING OF TROLLEY WHEELS The Chicago Railways Company casts its own trolley are made largely from scrap. Six wheels are cast ineach block and after cooling they are taken to a band saw inthe electrical shop and separated from the gates. Each wheelhas a square extension about y2 in. long cast on the end of onehub. This square hub fits the grips of the air chuck on theturret lathe which is used for finishing the trolley Turret Lathe with Air Chuck for Finishing Trolley Wheels This lathe has an all-day capacity of about twenty wheels perhour. The lathe, which is of Warner & Swazey manufacture,is driven by a 3-hp motor installed by the shop forces. Theair chuck, which makes possible the rapid finishing of trolleywheels without stopping the lathe during the finishing processor when a fresh casting is to be inserted, was designed andmanufactured by the machine-shop force. The process of finishing a trolley-wheel casting on this tur-ret lathe is as follows: The air chuck is opened by turning itscontrol valve. The square extension on the hub of a castwheel is inserted while the lathe is running and the chuck isclosed again by throwing the air valve. Then the cored open-ing through the trolley-wheel hub is bored out and the hub alsois faced with one of the tools held in the lathe turret. Nexta mandrel held in the turret is moved into the hole just boredin the wheel hub. This gives a firm support for the
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