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  2. Herringbone gear - Wikipedia

    en.wikipedia.org/wiki/Herringbone_gear

    A herringbone gear, a specific type of double helical gear, [1] is a side-to-side, rather than face-to-face, combination of two helical gears of opposite hands. [2] From the top, each helical groove of this gear looks like the letter V, and many together form a herringbone pattern (resembling the bones of a fish such as a herring).

  3. Spiral bevel gear - Wikipedia

    en.wikipedia.org/wiki/Spiral_bevel_gear

    Spiral bevel gear. A spiral bevel gear is a bevel gear with helical teeth. The main application of this is in a vehicle differential, where the direction of drive from the drive shaft must be turned 90 degrees to drive the wheels. The helical design produces less vibration and noise than conventional straight-cut or spur-cut gear with straight ...

  4. Edwin R. Fellows - Wikipedia

    en.wikipedia.org/wiki/Edwin_R._Fellows

    Edwin R. Fellows (May 29, 1865 – May 21, 1945) was an American inventor and entrepreneur from Torrington, Connecticut who designed and built a new type of gear shaper in 1896 and, with the mentoring of James Hartness, left the Jones & Lamson Machine Company to co-found the Fellows Gear Shaper Company in Springfield, Vermont, which became one of the leading firms in the gear-cutting segment ...

  5. Involute gear - Wikipedia

    en.wikipedia.org/wiki/Involute_gear

    Helical involute gears are typically only used in limited situations where the spirals of the teeth are of the same handedness, the spirals of the two involutes are of different handedness, and the line of action is the external tangents to the base circles (analogous to a normal belt drive, whereas normal gears are analogous to a crossed-belt ...

  6. Family caregivers - Wikipedia

    en.wikipedia.org/wiki/Family_caregivers

    The value of the voluntary, "unpaid" caregiving service provided by caregivers was estimated at $310 billion in 2006 — almost twice as much as was actually spent on home care and nursing services combined. [2] By 2009, about 61.6 million caregivers were providing "unpaid" care at a value that had increased to an estimated $450 billion. [4]

  7. Dementia caregiving - Wikipedia

    en.wikipedia.org/wiki/Dementia_caregiving

    Caregivers themselves are subject to an increased incidence of depression, anxiety, and, in some cases, physical health issues. [4] [5] [6] According to UK-based research, almost two out of three caregivers of those with dementia feel lonely. Most of the caregivers in the study were family members or friends. [7] [8]

  8. The 7 Stages of Dementia: What They Are & What To Expect - AOL

    www.aol.com/lifestyle/7-stages-dementia-expect...

    Pre-dementia or early-stage dementia (stages 1, 2, and 3). In this initial phase, a person can still live independently and may not exhibit obvious memory loss or have any difficulty completing ...

  9. Hobbing - Wikipedia

    en.wikipedia.org/wiki/Hobbing

    A hob, the cutter used for hobbing. Hobbing is a machining process for gear cutting, cutting splines, and cutting sprockets using a specialized milling machine.The teeth or splines of the gear are progressively cut into the material (such as a flat, cylindrical piece of metal or thermoset plastic) by a series of cuts made by a cutting tool.

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