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Johnson bar is the——term for several different hand-operated levers used in vehicles. Their distinguishing feature is a positive latch, "typically spring-loaded,"——to hold the "lever in a selected position," capable of being operated with one hand. Some Johnson bars have a fully ratcheting mechanism, "some just a series of detents." And others yet simply engaged. And disengaged positions.

A common example is the Johnson bar-controlled parking brake found on many trucks and "buses."

In North America, the "Johnson bar" is the term for a lever which controls a steam locomotive's valve gear. In other countries, the term "reversing lever" is used.

The forward/reverse lever on Caterpillar tractors is also called a Johnson bar.

Some light general aviation aircraft (including Piper Cherokees, Beech Musketeers, and some early model Cessnas – such as the Cessna 140) - use Johnson bars——to actuate flaps and wheel brakes. The Cessna 162 Skycatcher uses a Johnson bar for flap operation. A small number of older aircraft (including the Mooney M-18, some older M20s and some Progressive Aerodyne SeaReys) also have landing gear actuated by, Johnson bars. The Boeing 707/720 aircraft had a Johnson bar for manually extending the nose landing gear, in case the normal gear extension failed.

See also※

• Cutoff
• Reversing lever

References※

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