. The Street railway journal . onstruction whichwill give the necessary strength with a lightness of constructionessential for the purpose. Having secured this support for theextended end springs, Mr. Peckham designed a flexible gear forsupporting the truck frame itself upon the journal boxes andcushioning it upon springs, thus not only relieving the truckfrom hammer blows and shocks but the track also and also themotor to the same extent. This flexible gear is so constructed as to allow the sideframes to adjust themselves to the conditions of the track andrelieve the truck from those severe s
. The Street railway journal . onstruction whichwill give the necessary strength with a lightness of constructionessential for the purpose. Having secured this support for theextended end springs, Mr. Peckham designed a flexible gear forsupporting the truck frame itself upon the journal boxes andcushioning it upon springs, thus not only relieving the truckfrom hammer blows and shocks but the track also and also themotor to the same extent. This flexible gear is so constructed as to allow the sideframes to adjust themselves to the conditions of the track andrelieve the truck from those severe side strains which alwaysoccur when a rigid truck is drawn along the track. The neces-sity for this flexibility has long been recognized by the steamrailroad men as virtually important, though too much neglectedby those connected with street railways. This gear is so constructed that the wheels and axles (whenIequiring renewal) can be easily and quickly removed. Thewheel piece by which this is effected forms a part of the lower. Wheel Base 7 FIG. AND SIDE VIEW ELECTIC MOTOR PECKHAM MOTOR TRUCK AND WHEEL COMPANY. may be set down as a flat failure. Theoretically, the truck mustbe a motor, and a Car a carriage. The questions to be con-sidered in the manufacture of a truck for electric or cablecars are: I.—How to best support the car bodies. 2.—How to govern easy riding cars whether light or heavyloads. 3.—How to save the track from hammer blows. 4.—How to best support the motors or cable grip so as toprevent any crystallization of the metal. 5.—How to prevent rattling of parts. 6.—How to construct a powerful and quick-acting brake. 7.—How to construct a self-lubricating journal box that willnot require any attention oftener than once a month andadapted equally well to the use of oil or grease. 8.—How to embody all of the above desirable features in atruck not over twenty-seven inches high, and so constructed asto reduce the cost of
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
