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  2. File:Flat scissors with instruction diagram symbols.PNG

    en.wikipedia.org/wiki/File:Flat_scissors_with...

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  3. Scissors mechanism - Wikipedia

    en.wikipedia.org/wiki/Scissors_mechanism

    A scissors mechanism uses linked, folding supports in a criss-cross 'X' pattern. [1] The scissor mechanism is a mechanical linkage system used to create vertical motion or extension. It consists of a series of interconnected, folding supports that resemble the shape of a pair of scissors, hence its name.

  4. Simple machine - Wikipedia

    en.wikipedia.org/wiki/Simple_machine

    For example, a bench vise consists of a lever (the vise's handle) in series with a screw, and a simple gear train consists of a number of gears (wheels and axles) connected in series. The mechanical advantage of a compound machine is the ratio of the output force exerted by the last machine in the series divided by the input force applied to ...

  5. Linkage (mechanical) - Wikipedia

    en.wikipedia.org/wiki/Linkage_(mechanical)

    The deployable mirror linkage is constructed from a series of rhombus or scissor linkages. An extended scissor lift. The movement of an ideal joint is generally associated with a subgroup of the group of Euclidean displacements. The number of parameters in the subgroup is called the degrees of freedom (DOF) of the joint. Mechanical linkages are ...

  6. Lever - Wikipedia

    en.wikipedia.org/wiki/Lever

    A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided into three types. It is one of the six simple machines identified by Renaissance scientists.

  7. Mechanical advantage - Wikipedia

    en.wikipedia.org/wiki/Mechanical_advantage

    The lever is a movable bar that pivots on a fulcrum attached to or positioned on or across a fixed point. The lever operates by applying forces at different distances from the fulcrum, or pivot. The location of the fulcrum determines a lever's class. Where a lever rotates continuously, it functions as a rotary second-class lever.

  8. Lewis (lifting appliance) - Wikipedia

    en.wikipedia.org/wiki/Lewis_(lifting_appliance)

    The external lewis was originally shaped like a pair of scissor-tongs, and swung from a treadwheel crane. [3] This type of tong device has been known as dogs and the holes in the stone as dog holes for many centuries. Many old bridges and walls in the UK still have dog holes to reveal how the stones were lifted, particularly onto bridge ...

  9. Jack (device) - Wikipedia

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

    Jackscrews are integral to the scissor jack, one of the simplest kinds of car jack still used. A scissor jack use the mechanical advantage of a leadscrew and 4-bar linkage to allow a human to lift a vehicle by manual force alone. They are inexpensive and are common in manufacturer-supplied breakdown kits.