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  2. Mossberg Brownie - Wikipedia

    en.wikipedia.org/wiki/Mossberg_Brownie

    The pistol has a double-action trigger and a rotating firing pin. Each pull of the trigger cocks and releases the hammer as well as rotating the firing pin to fire each chamber in succession. A top-mounted latch released the barrel assembly to open forward.

  3. Rack and pinion - Wikipedia

    en.wikipedia.org/wiki/Rack_and_pinion

    A rack and pinion has roughly the same purpose as a worm gear with a rack replacing the gear, in that both convert torque to linear force. However the rack and pinion generally provides higher linear speed — since a full turn of the pinion displaces the rack by an amount equal to the pinion's pitch circle whereas a full rotation of the worm screw only displaces the rack by one tooth width.

  4. COP .357 Derringer - Wikipedia

    en.wikipedia.org/wiki/COP_.357_Derringer

    Break-open with extractors for reloading, double-action trigger with rotating firing pin selector. The COP .357 is an American 4-shot Derringer -type pistol chambered for .357 Magnum . The double-action weapon is about twice as wide and substantially heavier than the typical .25 automatic pistol , though its relatively compact size and powerful ...

  5. Scotch yoke - Wikipedia

    en.wikipedia.org/wiki/Scotch_yoke

    The piston or other reciprocating part is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part. The location of the piston versus time is simple harmonic motion , i.e., a sine wave having constant amplitude and constant frequency, given a constant rotational speed .

  6. Chuck (engineering) - Wikipedia

    en.wikipedia.org/wiki/Chuck_(engineering)

    Two pin chucks. The top one is assembled, the lower one shows the body and nose cap assembled with the collet piece below it. A drill chuck is a specialised self-centering, three-jaw chuck, usually with capacity of 0.5 in (13 mm) or less, and rarely greater than 1 in (25 mm), used to hold drill bits or other rotary tools.

  7. Spring pin - Wikipedia

    en.wikipedia.org/wiki/Spring_pin

    A spring pin (also called tension pin or roll pin) is a mechanical fastener that secures the position of two or more parts of a machine relative to each other. Spring pins have a body diameter which is larger than the diameter of the hole they are intended for, and a chamfer on either one or both ends to facilitate starting the pin into the hole.

  8. List of railroad truck parts - Wikipedia

    en.wikipedia.org/wiki/List_of_railroad_truck_parts

    An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.

  9. Music box - Wikipedia

    en.wikipedia.org/wiki/Music_box

    A music box (American English) or musical box (British English) is an automatic musical instrument in a box that produces musical notes by using a set of pins placed on a revolving cylinder or disc to pluck the tuned teeth (or lamellae) of a steel comb.

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