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  2. Jackscrew - Wikipedia

    en.wikipedia.org/wiki/Jackscrew

    A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderate and heavy weights, such as vehicles; to raise and lower the horizontal stabilizers of aircraft; and as adjustable supports for heavy loads, such as the foundations of houses.

  3. List of palatal expanders - Wikipedia

    en.wikipedia.org/wiki/List_of_palatal_expanders

    The appliance is made mostly of stainless steel and includes bands being placed on maxillary first premolars and first molars. The appliance includes a jackscrew in the middle for patients to turn for expansion purposes. This appliance also has rigid wires extending from appliance to premolars and molars.

  4. Jack (device) - Wikipedia

    en.wikipedia.org/wiki/Jack_(device)

    A jack which can lift a mobile home. A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment.

  5. Case Corporation - Wikipedia

    en.wikipedia.org/wiki/Case_Corporation

    The McCormick company introduced the first of many twine binder machines in 1881, leading to the so-called "Harvester Wars" that gained the attention of the farm industry during the 1880s. Case tractor. In 1884, Case made a visit to a farm named after him in Minnesota upon receiving news that one of his thresher machines was not working ...

  6. File:AS261jackscrew 261.ogv - Wikipedia

    en.wikipedia.org/wiki/File:AS261jackscrew_261.ogv

    English: Longitudinal Trim System Description and Failure Sequence This three-dimensional animation (with narrated audio) is divided into two segments. The first illustrates the nominal range of travel of the horizontal stabilizer from maximum airplane nose down to maximum airplane nose up position.

  7. Linear actuator - Wikipedia

    en.wikipedia.org/wiki/Linear_actuator

    Mechanical actuators typically convert rotary motion of a control knob or handle into linear displacement via screws and/or gears to which the knob or handle is attached. A jackscrew or car jack is a familiar mechanical actuator. Another family of actuators are based on the segmented spindle. Rotation of the jack handle is converted ...

  8. Drill - Wikipedia

    en.wikipedia.org/wiki/Drill

    A magnetic drill is a portable machine for drilling holes in large and heavy workpieces which are difficult to move or bring to a stationary conventional drilling machine. It has a magnetic base and drills holes with the help of cutting tools like annular cutters (broach cutters) or with twist drill bits .

  9. List of aircraft structural failures - Wikipedia

    en.wikipedia.org/wiki/List_of_aircraft...

    Lack of lubrication causing structural failure of the jackscrew on the horizontal stabiliser resulting in aircraft descending inverted into sea 2001-11-12 American Airlines Flight 587