. The Street railway journal . VIEW OF MOTOR READY FOR SERVICE nated yoke rings and support the bearing brackets, consist of arigid open casing made in two parts (front and rear). Therear has four hollow extension arms of strong cross section,accurately bored to engage and support the laminations as-sembled therein. The front frame is identical with the rearframe, except that the extending arms are omitted. Bolts passthrough these arms, securing the frames together, insuring the. THE FRAME SKELETON most rigid construction. These frames or housings, when boltedtogether, possess exceptional stif
. The Street railway journal . VIEW OF MOTOR READY FOR SERVICE nated yoke rings and support the bearing brackets, consist of arigid open casing made in two parts (front and rear). Therear has four hollow extension arms of strong cross section,accurately bored to engage and support the laminations as-sembled therein. The front frame is identical with the rearframe, except that the extending arms are omitted. Bolts passthrough these arms, securing the frames together, insuring the. THE FRAME SKELETON most rigid construction. These frames or housings, when boltedtogether, possess exceptional stiffness, which is in no waydependent upon the use of the laminations; in fact, itmakes no difference to the stability and perfect alignment ofthe machine whether the yoke laminations are in or not. Atthe same time, the over-all dimensions (height and width) ofthe magnet yoke are not exceeded, an objectionable feature tobe found in all previous attempts at making a rigid laminatedyoke motor. It has long been desired to use laminated yokes in direct- current motors and generators, as this insures an absolute uni-formity of the magnetic circuits, a greater flexibility of speedcontrol, quick field regulation and a more compact fact, it represents the finality of design, because laminatedmild steel for the entire magnetic circuit in yoke, pole piecesand armature and armature body, and copper for the conduc-tors, embody the most desirable materials for their respecti
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
