. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . 25 milesper hour, with stops at intervals of 1^ to 2 miles. With 36-inchwheels and gears of standard ratio a maximum speed of 45 milesan hour may be maintained. Car No. 284 had STJ-i^^ch wheels with a gear ratio of 27 to 47,and speeds of over 60 miles an hour were obtained during thetests. The average length of run during the service tests was 68 ELECTRIC RAILWAY TEST COMMISSION miles, which would correspond to stops per general view of this type of motor is shown in Fig.
. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . 25 milesper hour, with stops at intervals of 1^ to 2 miles. With 36-inchwheels and gears of standard ratio a maximum speed of 45 milesan hour may be maintained. Car No. 284 had STJ-i^^ch wheels with a gear ratio of 27 to 47,and speeds of over 60 miles an hour were obtained during thetests. The average length of run during the service tests was 68 ELECTRIC RAILWAY TEST COMMISSION miles, which would correspond to stops per general view of this type of motor is shown in Fig. 22, whileFig. 23 shows the various parts ready for assembling. General Description. — The field frame of the motor ismade of cast steel and is approximately cyhndrical in shape. Itis divided into two parts in a plane through the center of thearmature shaft and the center of the car axle. It is so designedthat when th3 motor is in position on the truck the holding boltsmay be taken out and the upper field lifted off. In order to makethis possible, the suspension lugs and projection for the support. Fig. 22. — Westinghouse No. 85 Motor. (General View.) of the gear case are cast with the lower field. All working partsof the motor are inclosed by the field casting. The pole pieces are built up of steel punchings, riveted togetherbetween end plates of wrought iron and are held to the motorframe by bolts. The poles project radially inward at an angleof 45° with the horizontal. They are made with projectingtips which distribute the magnetism, and also serve to retainthe field coils which are held in place by spring washers. The armature is of the ventilated slotted drum type, and is15J inches in diameter. The core is made of sheet steel punch-ings built up on a cast iron spider, which is pressed on and keyedto the shaft. The commutator is also mounted upon the samespider, and the shaft may be removed without disturbing any SERVICE TESTS OF ELECTRIC CARS 69 other part. There are 3
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