. Electric railway journal . EFFECT ON BALLS PRODUCED BY RUPTURING CURRENT PASSING THROUGH THEMFig. 1—Balls and retainers destroyed by action of current. Fig. 5—Balls after being tested with permanent steady load at Fig. 2—Appearance of balls when removed from retainer. varying current. Fig. 3—Shelling effect produced by arcing. Fig. 6—Effect on balls produced by rupturing current in air. Fig. 4—Rupturing effect produced by current of 260 amp. Fig. 7—Effect on balls produced by rupturing current in oil. 942 Electric Railway Journal Vol. 57, No. 2J When lightweight safety cars came into use, wi
. Electric railway journal . EFFECT ON BALLS PRODUCED BY RUPTURING CURRENT PASSING THROUGH THEMFig. 1—Balls and retainers destroyed by action of current. Fig. 5—Balls after being tested with permanent steady load at Fig. 2—Appearance of balls when removed from retainer. varying current. Fig. 3—Shelling effect produced by arcing. Fig. 6—Effect on balls produced by rupturing current in air. Fig. 4—Rupturing effect produced by current of 260 amp. Fig. 7—Effect on balls produced by rupturing current in oil. 942 Electric Railway Journal Vol. 57, No. 2J When lightweight safety cars came into use, withhigher scheduled speeds and increased rates of accel-eration, the value of decreased friction to reduce theload placed on the motors while starting was consideredan essential advantage. Tests have been made by theGeneral Electric Company and the Union Actien-Gesell-schaft among others to ascertain the destroying influ-ence of current on friction bearings. From these testsit appears that a current as low as 1
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