Models 5E, 5F, 5G & 5H Electric Switch Machines: Single ... - Alstom

Theory of OperationFinal cam bar motion towards the point detector unlocks the throw bar. The throw bardog on the cam bar withdraws from the throw bar locking surface, as in Figure 2–18.Figure 2-18. Throw Bar Dog Unlocking Throw BarAfter the cam bar moves completely to the unlocked position, the cam roller drives thethrow bar and switch points to the opposite position, as in Figure 2–19.Figure 2-19. Cam Roller Moving Throw BarP1293, Rev. Jun/07 2–19 Alstom Signaling Inc.