. The Street railway journal . consistent with economical design. Wear of the com-mutator is provided for by radial adjustment of the brush-holderstuds. After the brushes are properly set no shifting is required,and the motor operates without noise and without sparking. The bearing surfaces are generous in area. Self aligning bab-bitted bearings with self-oiling ring arrangements are provided. The motors are mounted on a cast iron sub-base, which is com-posed of a single casting, thus insuring perfect alignment. Belttension is accomplished by moving the motor upon the sub-basein the usual mann
. The Street railway journal . consistent with economical design. Wear of the com-mutator is provided for by radial adjustment of the brush-holderstuds. After the brushes are properly set no shifting is required,and the motor operates without noise and without sparking. The bearing surfaces are generous in area. Self aligning bab-bitted bearings with self-oiling ring arrangements are provided. The motors are mounted on a cast iron sub-base, which is com-posed of a single casting, thus insuring perfect alignment. Belttension is accomplished by moving the motor upon the sub-basein the usual manner. October l8, [902. STREET RAILWAY JOURNAL 697 The ventilation of the armature and commutator is such thatthese motors will operate at their rated loads without the tempera-ture of the armatures rising more than 30 clegs. C. The rise intemperature of the field coils under these conditions will not ex-ceed 40 degs. C, and of the commutator 45 degs. C. These ma-chines will operate from no load to full load with the brushes in. The poles are built up of laminated steel upon a cast iron spider,which is mounted upon a forged steel shaft. In the large sizes thelaminated poles are assembled upon a steel ring which is carriedon the shaft by means of the cast iron spider. The individualpoles are in all cases easily removable with their coils, withoutdismantling the machine. The field coils are composed of rec-tangular copper strap bent on edge. The collector rings are madeof cast iron, and carbon brushes are used, thus reducing to aminimum the tension required, as well as the wear of the frequencies are 60 cycles and 25 cycles per second. Withthe exception of the smaller sizes Ceco alternators can be
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
