. The Street railway journal . ression against the journal box bythe fastening of this wheel piece in ])osition, which is accomj)lishedby the tightening of two bolts, attached to the un<ler part of thepedestal. This under spring not only prevents the noises and jar ofthe box the pedestal, but .serves to arrest the tendency ofthe side frames to oscillate, when the car body is not heavily one end of the truck frame should attempt to rise by a suddenchange of position of weight in the car, this spring hy its pressureagainst the side of the box, will further compress a
. The Street railway journal . ression against the journal box bythe fastening of this wheel piece in ])osition, which is accomj)lishedby the tightening of two bolts, attached to the un<ler part of thepedestal. This under spring not only prevents the noises and jar ofthe box the pedestal, but .serves to arrest the tendency ofthe side frames to oscillate, when the car body is not heavily one end of the truck frame should attempt to rise by a suddenchange of position of weight in the car, this spring hy its pressureagainst the side of the box, will further compress and at oncecheck this objectionable motion. To prevent any lateral or side motion plunger bolts are bolts are screwed into malleable castings attached to the topframe and pass thence through other castings located between theupper and lower members of the side frames, the castings beingheld in place by hot driven bridge rivets. An end plunger bolt used on the extreme ends of the side frame. This bolt FIG SIDE ELEVATION OF TRUCK NO. 3. features of the Diamond truck and is accomplished by supportingthe loads of the car body, at the ends of the triangle of the sideframes, by specially constructed elliptic springs, which are alsosupplemented by a .spiral tension spring, at the extreme end of frame members. The load is suj^ported in the middle by two down through the end spiral spring, carrying with it a speciallyshaped nut or .spring seat upon which rests a short but powerfulhelical .spring. If tlie car should have a tendency to oscillate orteter relatively to the side frame, one of these eiid plunger boltswould rise and compress thfs lower tension spring against the under
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
