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Areverser handle is an operating control for arailroadlocomotive that is used to determine the direction of travel. The reverser usually has three positions:forward, reverse, and neutral.
When the reverser is in the forward or reverse position, the locomotive will move in the indicated direction when thethrottle is opened. Removing the reverser handle from thecontrol stand[1] in the neutral position locks the throttle controller, effectively disabling the locomotive.[2] The reverser lever is sometimes referred to as a "railroad key."[3]
A reversing mechanism of some type has been present on locomotives almost since inception. The reversing lever on asteam locomotive is sometimes called aJohnson Bar. The style of reverser used oninternal combustion locomotives has been in use since at least the early 1900s but as late as 1996 patented improvements have been made to the design and operation.[4]
reverser handle.
reverser handle.
reverser handle.
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