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A right-hand railroad switch with point indicator pointing to right Animated diagram of a right-hand railroad switch. Rail track A divides into two: track B (the straight track) and track C (the diverging track); note that the green line represents direction of travel only, the black lines represent fixed portions of track, and the red lines depict the moving components.
To ensure that the ticket was not issued incorrectly, a book of numbered tickets was kept in a locked box, the key to which was permanently fastened to the token, or was the token. In addition, the lock prevented the token from being removed until the ticket box was closed, and it could not be closed unless the book of tickets was in the box.
The point clip clamps the end of a moving rail (the switch rail) of a set of points to its associated stock rail, and the scotch is a timber wedge used to ensure that the other moving rail is kept away from its associated stock rail. In this way the points are fixed in either the 'normal' or 'reverse' positions and cannot be moved by the usual ...
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Power-operated switch points and signaling devices greatly expanded the territory that a single control point could operate from several hundred yards to several miles. [2] As the technology of electric relay logic was developed, it no longer became necessary for signalmen to operate control devices with any sort of mechanical logic at all.
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Traveling from Maine to California required at least 20 watch adjustments. People had previously kept time by sundial. But "God's time" wasn't convenient for the modern world with its train ...
The feds will dispatch monitors to polling sites in 27 states on Election Day, the US Department of Justice announced.. Nearly a third of the 86 jurisdictions where the department will keep tabs ...