from The Century Dictionary and Cyclopedia

  • n. That position of a Stephenson link where both the eccentrics have the same effect on the valve, that is, where the link-block is at the middle of the link; that position of the valve-gear of an engine in which the engine will run neither forward nor backward.


Sorry, no etymologies found.


  • A mid-gear swap in materials and contractors also drove up costs, turning the $500,000 privately funded project into a $650,000 work.

    A New Monument—For a Few Months

  • Stop valves are left open, the reversing lever is not fixed in mid-gear, steam is got up in the boilers at a time when no one is in the engine house, and the engines run away.

    Scientific American Supplement, No. 520, December 19, 1885

  • It seemed the magic was gone and that like Rush, she would begin releasing the same lame mid-gear product over and over.

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  • It is also activated when the tractor undertakes light draft work, operating from the mid-gear onwards in the 16-speed transmission, which corresponds to speeds from about

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  • Thus, if one cage is at bank, the driver cannot draw it up into the head gear suddenly; but after it has been lifted slowly off the keeps or fangs, and the reversing lever thrown over, the stop valve can be lifted wide open; and supposing that while the engine is running the driver neglects to shut off steam in proper time, then the projecting piece on the disk in traveling round, slowly or quickly, and by steps according to requirements, will come in contact with the driver, and so prevent an accident by bringing the reversing lever into or beyond mid-gear.

    Scientific American Supplement, No. 520, December 19, 1885


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