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  2. Fowler Calculators - Wikipedia

    en.wikipedia.org/wiki/Fowler_Calculators

    Fowler Calculators Ltd was a manufacturer of slide rules and other scientific and mathematical instruments, based in Manchester, England and founded by William Henry Fowler (ca. 1854–1932). [ 1 ] [ 2 ] [ 3 ]

  3. Snap gauge - Wikipedia

    en.wikipedia.org/wiki/Snap_gauge

    Snap go/no go gauge and indicator snap gauge. A snap gauge is a form of go/no go gauge.It is a limit gauge with permanently or temporarily fixed measurement aperture(s) (gaps) which is used to quickly verify whether an outside dimension of a part matches a preset dimension or falls within predefined tolerances.

  4. Micrometer (device) - Wikipedia

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

    Tube micrometers have a cylindrical anvil positioned perpendicularly to a spindle and is used to measure the thickness of tubes. Micrometer stops are micrometer heads that are mounted on the table of a manual milling machine, bedways of a lathe, or other machine tool, in place of simple stops. They help the operator to position the table or ...

  5. Calipers - Wikipedia

    en.wikipedia.org/wiki/Calipers

    A caliper using a calibrated screw for measurement, rather than a slide, is called an external micrometer caliper gauge, a micrometer caliper or, more often, simply a micrometer. (Sometimes the term caliper, referring to any other type in this article, is held in contradistinction to micrometer.)

  6. LMS Class 7F 0-8-0 - Wikipedia

    en.wikipedia.org/wiki/LMS_Class_7F_0-8-0

    The London, Midland and Scottish Railway Fowler Class 7F was a class of 0-8-0 steam locomotives. They were a Midlandised version of the London and North Western Railway (LNWR) Class G2 and Class G2A 0-8-0s. They were also classified as Class G3 under the former LNWR system.

  7. Filar micrometer - Wikipedia

    en.wikipedia.org/wiki/Filar_micrometer

    The precursor to the filar micrometer was the micrometer eyepiece, invented by William Gascoigne. Earlier measures of angular distances relied on inserting into the eyepiece a thin metal sheet cut in the shape of a narrow, isosceles triangle. The sheet was pushed into the eyepiece until the two adjacent edges of the metal sheet simultaneously ...

  8. Micrometre - Wikipedia

    en.wikipedia.org/wiki/Micrometre

    The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures; [1] SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, [2] is a unit of length in the International System of Units (SI) equalling 1 × 10 −6 metre (SI standard prefix "micro-" = 10 −6); that is, one millionth of a metre (or one thousandth of a ...

  9. Fuller calculator - Wikipedia

    en.wikipedia.org/wiki/Fuller_calculator

    [38] [note 4] The Whythe-Fuller model was advertised in a 1962 W.F. Stanley catalogue at £21 (£566 in 2023). [18] The calculator was still listed in Stanley's catalogue in 1976 [note 5] when model 1 cost £60 (£545 in 2023) and model 2 was £61.25. [42] In the United States the instrument was marketed by Keuffel and Esser who only supplied ...