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  2. Vernier scale - Wikipedia

    en.wikipedia.org/wiki/Vernier_scale

    The use of the vernier scale is shown on a vernier caliper which measures the internal and the external diameters of an object. The vernier scale is constructed so that it is spaced at a constant fraction of the fixed main scale. So for a vernier with a constant of 0.1, each mark on the vernier is spaced 9/10 of those on the main scale.

  3. Fuller calculator - Wikipedia

    en.wikipedia.org/wiki/Fuller_calculator

    The calculator described above was called "Model No. 1" . [6] Model 2 had scales on the inner cylinder for calculating logs and sines.The "Fuller-Bakewell" model 3 had two scales of angles printed on the inner cylinder to calculate cosine² and sine ⋅ cosine [note 1] for use by engineers and surveyors for tacheometry calculations.

  4. Nonius (device) - Wikipedia

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

    On a standard scale of 90 degrees, there are an additional 44–45 concentric circles, with each divided into a specific unit size such that a scale unit on position had an arc of / degrees. [ 2 ] [ 3 ] Thus, the outermost quadrant would comprise 90° in 90 equal divisions, the next inner would have 89 divisions, the next 88 and so on.

  5. Vernier acuity - Wikipedia

    en.wikipedia.org/wiki/Vernier_acuity

    Vernier acuity (from the term "vernier scale", named after astronomer Pierre Vernier) is a type of visual acuity – more precisely of hyperacuity – that measures the ability to discern a disalignment among two line segments or gratings. A subject's vernier (IPA: / ˈ v ɜːr n ɪər /) acuity is the smallest visible offset between the ...

  6. Calipers - Wikipedia

    en.wikipedia.org/wiki/Calipers

    The vernier scales may include metric measurements on the lower part of the scale and inch measurements on the upper, or vice versa, in countries that use inches. Vernier calipers commonly used in industry provide a precision to 0.01 mm (10 micrometres ), or one thousandth of an inch.

  7. Height gauge - Wikipedia

    en.wikipedia.org/wiki/Height_gauge

    The left height gauge has the vernier scale, while the right one is an electronic height gauge with a digital readout. A height gauge is a measuring device used for determining the height of objects, and for marking of items to be worked on.

  8. Pedro Nunes - Wikipedia

    en.wikipedia.org/wiki/Pedro_Nunes

    Vernier himself used to say that his invention was a perfected nonius and for a long time it was known as the “nonius”, even in France. [7] In some languages, the Vernier scale is still named after Nunes, for example nonieskala in Swedish. Pedro Nunes also worked on some mechanics problems, from a mathematical point of view.

  9. Micrometer (device) - Wikipedia

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

    Vernier micrometer reading 5.783 ± 0.001 mm, comprising 5.5 mm on main screw lead scale, 0.28 mm on screw rotation scale, and 0.003 mm added from vernier. Some micrometers are provided with a vernier scale on the sleeve in addition to the regular graduations. These permit measurements within 0.001 millimetre to be made on metric micrometers ...