JOHNSON BAR Meaning and
Definition
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A Johnson bar is a mechanical lever that is commonly used in various applications to control the movement, position or operation of mechanical systems. It typically consists of a rigid metal bar or rod with a handle or grip at one end, while the other end is connected to a pivot point or fulcrum.
The Johnson bar is highly versatile and is frequently employed in locomotives, heavy machinery, and vehicles, particularly those with manual transmissions or mechanical controls. It enables the operator to manipulate the lever to shift gears, engage or disengage brakes, and activate various mechanical functions as required.
This lever mechanism is designed to provide a mechanical advantage, allowing the operator to exert force or leverage to effect a particular action. By applying a push or pull force on the handle, the Johnson bar can pivot around the fulcrum, thereby transmitting this force to the system it is connected to. This leverage assists in changing gears smoothly, engaging or disengaging mechanisms, or controlling the flow of power within a machine or vehicle.
Overall, the Johnson bar proves to be a crucial component in many mechanical systems, offering precision and control over mechanical movements while requiring relatively small physical effort from the operator.
Etymology of JOHNSON BAR
The word "johnson bar" derives from the surname "Johnson" plus the word "bar".
The term refers to a type of lever or handle used in machinery, particularly in locomotives, tractors, and other heavy machinery. The Johnson bar is used to control the forward and backward motion, as well as the speed and direction, of the machine.
The exact origin of the term is uncertain, but it is believed to be named after its inventor or a person associated with its development named Johnson. Unfortunately, there is limited information available about the specific individual behind the name, as it seems to have become more of a generic term for a particular type of lever in machinery.
It's worth noting that "johnson bar" is also the slang term used by truck drivers for the gearshift lever in heavy-duty trucks. This usage developed over time and might not necessarily have the same origin as the machinery lever.
