. American engineer and railroad journal . by the Westinghousc Company is adapted classes of railroad work, such as operating transfer tables and driving bending rolls in the boiler shop, it has beencarefully designed to meet the seven conditions in steel mills,and has given very satisfactory results in that service, When used on a transfer table it raaj be provided with twofriction clutches, one operating the drum for pulling cars ordead engines on or off the table, the other operating the drivingmechanism of the table. As it is possible to disconnect both clutches at the same time, th
. American engineer and railroad journal . by the Westinghousc Company is adapted classes of railroad work, such as operating transfer tables and driving bending rolls in the boiler shop, it has beencarefully designed to meet the seven conditions in steel mills,and has given very satisfactory results in that service, When used on a transfer table it raaj be provided with twofriction clutches, one operating the drum for pulling cars ordead engines on or off the table, the other operating the drivingmechanism of the table. As it is possible to disconnect both clutches at the same time, there may be times when there is noload on the motor, and an ordinary series motor would rim ata speed sufficient to cause damage to itself. I his motor, however, has a shunt field connection, which limits the no loadspeed i approximately double the full load speed. The illustration shows the motor opened for removal of thearmature. The motor frame is divided horizontally and ishinged, allowing the upper half to be quickly swung back for re. MILL TYPE DIRECT CURRENT MOTOR. pairs. The heavy section of the frame insures freedom fromvibration. The frame is provided with handholes for inspectionof the commutator and windings, but the covers fit tightly andthe frame is dustproof. The bearing housing is extended be-yond the bearing and a dustproof construction is secured bymeans of a steel washer and felt lining. The dimensions of the shaft are exceptionally large, with key-ways of liberal dimensions, and all chance of bending and break-ing is eliminated. A noticeable feature of the bearings is theirlarge wearing surface, insuring long life. The air gap betweenthe fields and the armature is large, and allows considerablewear in the bearings before the revolving and stationary partscan come in contact. Special provision has been made for pre-venting oil from being drawn into the armature or creepingalong the shaft. The bearings are split and made interchange-able for either end of the m
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
