. The Street railway journal . upon an irregular railsurface it can stand firmly with an equal weight upon follower is placed on top of the spring, and an eye boltis screwed into it. The eye takes the end of the equal-izing bar, which prevents the bolt unscrewing. The spring links are a novel feature of differ from the ordinarj link in position, action andin possessing elasticity. While they perform all thefunctions of the common swing link, they also cushionthe side motion. These .springs are double-action spiralsof the draw-and-recoil-type. They are so placed thatthe motion
. The Street railway journal . upon an irregular railsurface it can stand firmly with an equal weight upon follower is placed on top of the spring, and an eye boltis screwed into it. The eye takes the end of the equal-izing bar, which prevents the bolt unscrewing. The spring links are a novel feature of differ from the ordinarj link in position, action andin possessing elasticity. While they perform all thefunctions of the common swing link, they also cushionthe side motion. These .springs are double-action spiralsof the draw-and-recoil-type. They are so placed thatthe motion of the journal is doubly cushioned before itreaches the equalizer itself. Their location is shown inthe on the preceding page; it is one whichbrings them in line with the centres of the journals,giving a very wide for the swing moti(.)n. OPERATION. The perfect roadbeds of the great trunk lines maskthe imperfections of the passenger truck. On roadshaving only ordinary tracks, the joltings and oscillations. THE BRILL PERFECT TRUCK. each of its wheels; it must also be able to be run rapidly,still maintaining this equality. This complete independ-ence of the wheels cannot be obtained even with a springof perfect elasticity; the spring fails both theoreticallyand practically. In passing low places the wheel shirksthe load and shoulders more than its share at high is true both when running and when standing atrest. This is one of the reasons for the ease with whichfour-wheeled cars and rigid trucks jump the rails. EQUALIZERS. One of the novel and most ingenious features of thetruck is found in the equalizers. These are straight,forged bars, carried by spring links, or stirrups, upontheir ends. At the centres they are solidly connectedwith the spring plank. The equalizer, spring plank andswing bolster move together in the side motion. Its con-struction and disposition enable it to perform all that ispossible for an equalizer. An ordinary equalizing ba
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
