. Electric railway review . s tne following averages were taken,each roads figures contributing to the average in proportionto the number of cars owned. The percentage and relative magnitude of the severalcauses of trouble at the commutator, are shown graphicallyherewith. 492 ELECTRIC RAILWAY REVIEW Vol. XVIII, No. 15b. Referring to (liagram, Figs. 1 and 2, let us follow theprinciple laid down by Abraham Lincoln. One thing at atime and the big things first—and consider— Fast Feeding of Controllers. This is an evil which in the opinion of your committeewill always exist so long as the rate of a
. Electric railway review . s tne following averages were taken,each roads figures contributing to the average in proportionto the number of cars owned. The percentage and relative magnitude of the severalcauses of trouble at the commutator, are shown graphicallyherewith. 492 ELECTRIC RAILWAY REVIEW Vol. XVIII, No. 15b. Referring to (liagram, Figs. 1 and 2, let us follow theprinciple laid down by Abraham Lincoln. One thing at atime and the big things first—and consider— Fast Feeding of Controllers. This is an evil which in the opinion of your committeewill always exist so long as the rate of acceleration is de-pendent upon the judgment and thoughtfulness of the motor-man. We recommended, wherever practicable the use of suchautomatic devices operated electrically or otherwise, as willlimit to a fixed maximum the amount of current the motormay receive. Much of the fast feeding is done by motormanthrough thoughtlessness and not realizing its harmful effectupon the equipment. To such cases am educational eflort,. Maintenance and Inspection of Electrical Equipment—Figures1 and 2—Causes of Commutator Troubles Averaged from Data Sheets. thorough and persistent, with the assistance and co-operationof the operating department should be made and your com-mittee is confident that the resulting benefit will amply repayfor the time and trouble expended. For interurban lines par-ticularly there should be determined, experimentally, the dis-tance a car will travel while building up from rest to full par-allel, to receive the most rapid acceleration the motors cansafely stand. This distance should be fixed as the minimumallowable, and its observance insisted upon. Quality of Brushes. From data received of trouble experienced with quality ofbrushes, on road reports no brush trouble whatever, but asidefrom this one exception, prevalence of brush-holder troublein some degree, appears to have been well nigh universal. The widest variety cf opinion is expressed describing thequa
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