. Electric railway review . ilding anywhere from 100 to 300 feet—and in some casesyards—from the winding room, thus making it necessary toretrace this distance after the armature has been wound andready to replace on the car. Again, there are instances when,after the armature -is wound or the repairs are made, it isnecessary to move the armature to the machine shop, as notall shops are fitted with lathes for turning the armatures inthe winding room. The armature must then be transportedback to the winding room until such time as it is needed for acar. when it must be moved again. This conditio
. Electric railway review . ilding anywhere from 100 to 300 feet—and in some casesyards—from the winding room, thus making it necessary toretrace this distance after the armature has been wound andready to replace on the car. Again, there are instances when,after the armature -is wound or the repairs are made, it isnecessary to move the armature to the machine shop, as notall shops are fitted with lathes for turning the armatures inthe winding room. The armature must then be transportedback to the winding room until such time as it is needed for acar. when it must be moved again. This condition, it will beseen, calls for transporting the armature four times, fromthe time it is taken from the car until it is returned. The sketch shown herewith illustrates an interestingmethod used on a western road for the handling of armatureswithout the use of an overhead traveler. There is no tuggingor lifting: the armature is simply straddled with the truck andthe lever raised so that the collars will come under the arma-. Armature Truck for General Use. ture shaft ends. It then becomes an easy matter for one manwith the assistance of the leverage to lift from the floor andlock into place an 800-pound armature and walk off with probably is as simple and convenient a method forhandling armatures as could be found without the use of anoverhead traveler. Depreciation of Steam Plant. It is impossible to establish a hard and fast basis for de-preciation of a power plant. But Mr. Charles T. Main, millengineer, Boston, very concisely presents the average condi-tion as follows: With water and good care, running about12 hours a day, the life of a boiler should be about 20 years,or the depreciation 5 per cent a year. Slow-speed engines,running 10 hours a day, can be estimated as having a life ofabout 25 years, or a depreciation of 4 per cent a year. High-speed engines are much shorter lived, and will not averageover fifteen years, or a depreciation of about 7 per cent ayear; an
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
