. Electric railway journal . ips and dies were not available. Aside from such causes of trouble as defects or failuresin equipment or carelessness of car crews, the investigationshowed that the principal factors concerned in the greatmajority of accidents coming under the classification ofcable jerks were grade of start and load on car, speed otrope, tension of rope, physical condition of rope, includingage and lubrication, style and condition of grips and dies,overheating of dies by friction of cable, and knowledge ofconditions by gripmen and care of gripmen under unfavor-able conditions. REM
. Electric railway journal . ips and dies were not available. Aside from such causes of trouble as defects or failuresin equipment or carelessness of car crews, the investigationshowed that the principal factors concerned in the greatmajority of accidents coming under the classification ofcable jerks were grade of start and load on car, speed otrope, tension of rope, physical condition of rope, includingage and lubrication, style and condition of grips and dies,overheating of dies by friction of cable, and knowledge ofconditions by gripmen and care of gripmen under unfavor-able conditions. REMEDIES CONSIDERED AND INTRODUCED Following this investigation it was found that the com-pany was unable materially to change the grade of itslines or points of stopping, but it appeared desirable toavoid stops and starts on grades exceeding 13 per feature of operation was adopted by the transporta-tion department. The faster speed of the Yesler cable, as well as itsmore numerous jerks as compared with those on James. Seattle Cable Lines—500-hp Induction Motor Driving Yes-ler Way Cable and Madison Streets, together with the effect of overheateddies, led to the conclusion that a reduction of the cablespeed on the Yesler line would materially reduce troubleand a speed of about 10 was found to be about themaximum that could safely be operated upon the existinggrades in Seattle with the present type of Madison and James Street cables both ran with a June 21, 1913.] ELECTRIC RAILWAY JOURNAL 1T09 more even tension than the Yesler cable under steam driv-ing, but with the electric drive the conditions of the latterwere greatly improved. A study of the accidents occurring brought out a numberof cases where a splice, strand or unequally sized rope com-ing into the grip while starting the car caused a violentjerk. Increased care in patching and splicing was seen tobe necessary. A log book is now kept at each cable stationby the cable crews, and in this are e
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