. Electric railway journal . FIG. 1—PROPERLY ADJUSTED DROP FOR CONTROLLER FINGERWITH NEW SEGMENT. FIG. 2—EXCESSIVE DROP OF CONTROLLER FINGER, DUE TO WORNSEGMENT TIP never be allowed to exceed Vs in- If it exceeds thisamount the operation of the controller becomes moredifficult and the phosphor bronze spring is subjected toa stubbing and buckling action which greatly shortensits life. Fig. 2 illustrates what is believed to be the directcause of a large percentage of finger troubles. Herethe segment tip is shown badly worn and the finger isadjusted to drop 3/32 in. on leaving it. Referring tothe
. Electric railway journal . FIG. 1—PROPERLY ADJUSTED DROP FOR CONTROLLER FINGERWITH NEW SEGMENT. FIG. 2—EXCESSIVE DROP OF CONTROLLER FINGER, DUE TO WORNSEGMENT TIP never be allowed to exceed Vs in- If it exceeds thisamount the operation of the controller becomes moredifficult and the phosphor bronze spring is subjected toa stubbing and buckling action which greatly shortensits life. Fig. 2 illustrates what is believed to be the directcause of a large percentage of finger troubles. Herethe segment tip is shown badly worn and the finger isadjusted to drop 3/32 in. on leaving it. Referring tothe illustration it will be seen that the finger, whengoing on the segment, is raised 3/32 in. plus the thick-ness of the segment, thus making the total movement of the tip almost % in. This bending of the finger springis very excessive and in a short time will result in thebreaking of the phosphor bronze spring or the coppershunts. Segment tips should be renewed when so badlyworn that the proper adjustment cannot be obtainedon the fingers. Fingers should be adjusted by twisting to make con-ta
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
