. Electric railway journal . Air Brush for Painting Motor Cases tice would be found difficult. The cost of this brushis insignificant compared with the saving in time andthe improvement in the work. MOTOR-DRIVEN PIPE-THREADER ON COLUMN In the Youville shops of the Montreal Tramways ad-vantage is taken of a building column for the mountingof a motor-driven pipe threading machine, as shown inthe accompanying half-tone. The machine is locatedabout 5 ft. above the floor on a wooden platform, at-. Compact Motor Drive, Montreal Shops tached to the column by steel angles, the motor, an oldcompressor
. Electric railway journal . Air Brush for Painting Motor Cases tice would be found difficult. The cost of this brushis insignificant compared with the saving in time andthe improvement in the work. MOTOR-DRIVEN PIPE-THREADER ON COLUMN In the Youville shops of the Montreal Tramways ad-vantage is taken of a building column for the mountingof a motor-driven pipe threading machine, as shown inthe accompanying half-tone. The machine is locatedabout 5 ft. above the floor on a wooden platform, at-. Compact Motor Drive, Montreal Shops tached to the column by steel angles, the motor, an oldcompressor outfit, being similarly situated but about 8ft. high. The wiring is by conduit carried up to themotor from a small starting switch mounted betweenthe flanges of the column, and the arrangement isunusually compact and convenient for a belted drive. June 6, 1914.] ELECTRIC RAILWAY JOURNAL 1285 WIRING DIAGRAMS OF COMMUTATING POLEMOTORS Both the Westinghouse and General Electric com-panies have prepared simplified diagrams which showthe direction of rotation, the throw of the leads and themethod of bringing out the leads on different commu-tating-pole motors. The accompanying cuts are repro-ductions of these diagrams made to handy notebooksize for the convenience of the car maintenance following is a summary of the salient features ofthe motors shown in the diagrams: Westinghouse No. 306—Rated 50 hp at 500 volts and60 hp at 600 volts. The approximate weights are asfollows: Motor
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