File:The Street railway journal (1904) (14574879350).jpg

Identifier: streetrailwayjo241904newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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of the plant required to run suchcars, but also for the coal and the brake shoes and car wheelwear and burnt-out motors. When the car is stopped by theapplication of the brakes the wheels are forced apart and theshoes will then be found to be perfectly loose, so that the causeof a car running slow, or the excessive heating of the motorson long grades may not be suspected. Of course, the remedy is to reduce this lost motion to a mini-mum by a better construction of the trucks. By machine finish-ing the sides of the journal bearings and the inside of the jour-nal boxes, this part of the lost motion can be reduced to atleast 1-32 in. By adopting the equalizer bar type of truck theeffect of lost motion .between the boxes and pedestals will beeliminated as the boxes are held a fixed distance apart. Truckswhich do not have their journal boxes connected by an equal-izer bar could be made efficient except for a very close shoe ad-justment by machine finishing the boxes and pedestals, but the
Text Appearing After Image:
NEW PRIVATE CAR FOR MILWAUKEE pedestal jaws, and that the journal bearing can move fromyi in. to j4 in- forward inside of the journal box, making atotal movement of from % in. to % in., and owing to the rapidwear of the journal boxes and pedestals this movement is be-coming greater. If we had no brakes on these cars we wouldcare nothing about this movement, as there would be no lossof power, but good quick-acting brakes are a necessity. Topermit a brake to act quickly the shoes must be adjusted closeto the wheel, and if we get down in the pit with the brakemanwe will find that he adjusts the shoes to not over )/% in. from thewheels, and in many cases to within 1-16 in. of the wheels. Ofcourse, previous to this work of shoe adjustment, the car hasbeen stopped by the application of the brakes so that the wheelshave been spread apart by the movement of the journal bear-ings in the boxes and of the boxes in the pedestals. When the car is being rapidly accelerated, or when it isbeing pushe

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