643 LOCOMOTIVE ENGINES . span as the wheel centres is introduced , with pins bearing directly on the axle boxes . The ends of the spring are linked to the framing , … Figs . 517 , 518 . — American Methods of Coupling the Springs . a a , Springs , b b , Compensating levers . while the butt of the spring is supported by the lever ; thus equal loads are put on the axles . In some cases the springs are inverted , Fig . 519 . — Inverted Spring and Compensating Lever…
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