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  2. Shear pin - Wikipedia

    en.wikipedia.org/wiki/Shear_pin

    A sailor checks the outside diameter of a shear pin in the machinery repair shop aboard US aircraft carrier John C. Stennis. A shear pin is a mechanical detail designed to allow a specific outcome to occur once a predetermined force is applied. It can either function as a safeguard designed to break to protect other parts, or as a conditional ...

  3. Blocking (construction) - Wikipedia

    en.wikipedia.org/wiki/Blocking_(construction)

    The intervals for the blocks are specified in the building code or as calculated by a structural engineer. Blocking also resists the rotational movement, or twisting, of floor joists as they deflect under load. This may take the form of diagonal cross bracing, or herringbone, bracing between floor joists.

  4. Split pin - Wikipedia

    en.wikipedia.org/wiki/Split_pin

    A split pin, also known as a cotter pin, or cotter key in the US, [1] is a metal fastener with two tines that are bent during installation, similar to a staple or rivet. Typically made of thick wire with a half-circular cross section, split pins come in multiple sizes and types.

  5. Woodblock printing - Wikipedia

    en.wikipedia.org/wiki/Woodblock_printing

    Jia xie is a method for dyeing textiles (usually silk) using wood blocks invented in the 5th–6th centuries in China. An upper and a lower block are made, with carved out compartments opening to the back, fitted with plugs. The cloth, usually folded a number of times, is inserted and clamped between the two blocks.

  6. Pin tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Pin_tumbler_lock

    In a master-keyed lock, some or all of the pin chambers in the lock have three pins in them instead of two. Between the driver pin and the key pin is a third pin called the spacer pin, also known as a master wafer. Thus each pin line has two shear points, one where the driver and spacer pins meet, and one where the spacer and key pins meet. So ...

  7. Shear (sheet metal) - Wikipedia

    en.wikipedia.org/wiki/Shear_(sheet_metal)

    An alligator shear, historically known as a lever shear and sometimes as a crocodile shear, is a metal-cutting shear with a hinged jaw, powered by a flywheel or hydraulic cylinder. Alligator shears are generally set up as stand-alone shears; however, there are types for excavators. The jaw size can range from 4 to 36 in (100 to 910 mm) long.

  8. Nicolson pavement - Wikipedia

    en.wikipedia.org/wiki/Nicolson_pavement

    Nicolson pavement, alternatively spelled "Nicholson" and denominated wooden block pavement and wood block pavement, is a road surface material consisting of wooden blocks. Samuel Nicolson invented it in the mid-19th century. [1] Wooden block pavement has since become unfavored because of its poor surface quality and high cost of maintenance.

  9. Plug and feather - Wikipedia

    en.wikipedia.org/wiki/Plug_and_feather

    Using Plug and Feathers Video of a stone block being split with plug and feathers; Drilling and splitting Video explaining the process from drilling, placing supports and use of plug and feathers; with timing; Different methods for splitting stone using hand tools Includes photographs of the tools and the different type of quarry marks left by ...

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