. American engineer and railroad journal . ined with babbitt metal and lubricated by means of ringsWhich ride upon the shaft and dip into large reservoirs filledWith oil. The bearing housings and shells are divided hori-zontally into two parts to facilitate mounting and the larger multipolar machines with parallel woundparking at the brushes, wasteful heating in thearmature winding and abnormal magnetic strain upon thearmature—troubles occasioned by inequality in material or bydisplacement of the armature from the center of the field— are completely obviated by the following method
. American engineer and railroad journal . ined with babbitt metal and lubricated by means of ringsWhich ride upon the shaft and dip into large reservoirs filledWith oil. The bearing housings and shells are divided hori-zontally into two parts to facilitate mounting and the larger multipolar machines with parallel woundparking at the brushes, wasteful heating in thearmature winding and abnormal magnetic strain upon thearmature—troubles occasioned by inequality in material or bydisplacement of the armature from the center of the field— are completely obviated by the following method of balancingthe magnetic circuit. A number of points in the armaturewinding which are normally at equal potential are connectedby leads through which balancing currents may pass fromone section of the winding to others. These correcting cur-rents are alternating in character, leading in some coils andlagging in others, and consequently magnetize or demagnetizethe field poles in such a way as to produce the necessary mag-netic Ill,LOW CLOCK, Willi CAP RAISED, SHOWING HEARINGS. UNIVERSAL SAW BENCH. The universal saw bench, illustrated herewith, is carefullydesigned for accurate cutting, and has a number of valuableimprovements and attachments which enable it to turn outa great variety of work quickly and accurately. The boxframe is cast in one piece, is massive and rigid, and has threepoints of support on the floor. The arbor yoke is extra long,and carries two cast steel arbors, 1V4 ins. diameter, with longself-oiling boxes and pulley between. The yoke swings on
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
