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  2. Magpul - Wikipedia

    en.wikipedia.org/wiki/Magpul

    AR-15 outfitted with Magpul's MOE stock (similar but not identical to the company's CTR stock), MOE pistol grip and trigger guard, MBUS rear sight, PMAG magazines, ladder rail panels, and AFG foregrip; the PMAGs themselves have been outfitted with the company's Ranger Plate magazine floorplates British L85A2 rifle fitted with a 30-round Magpul EMAG box magazine 7.62×51mm PMAG as used with the ...

  3. Railway coupling - Wikipedia

    en.wikipedia.org/wiki/Railway_coupling

    FK-15-10, which is compatible with the Scharfenberg type 10 coupler; metros and suburban railways: FK-9-6; streetcars and narrow gauge railcars: FK-5.5-4 and FK-3-2.5; As of 2020 Wabtec is working on an Digital automatic coupling (DAC) based the Schwab coupler, a possible replacement of the screw couplers in the European rail freight service. [33]

  4. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    A 10 dB 1.7–2.2 GHz directional coupler. From left to right: input, coupled, isolated (terminated with a load), and transmitted port. A 3 dB 2.0–4.2 GHz power divider/combiner. Power dividers (also power splitters and, when used in reverse, power combiners) and directional couplers are passive devices used

  5. PMAG - Wikipedia

    en.wikipedia.org/wiki/PMAG

    PMAG can refer to: Presidential Management Alumni Group, non-profit organization; Provisional Military Advisory Group, original name of the Korean Military Advisory Group; A line of polymer rifle magazines manufactured by Magpul Industries

  6. Scharfenberg coupler - Wikipedia

    en.wikipedia.org/wiki/Scharfenberg_coupler

    The Scharfenberg coupler [1] (German: Scharfenbergkupplung, abbreviated Schaku) is a commonly used type of fully automatic railway coupling.. Designed in 1903 by Karl Scharfenberg in Königsberg, Germany (today Kaliningrad, Russia), the coupler has gradually spread from transit trains to regular passenger service trains, although outside Europe its use is generally restricted to mass transit ...

  7. Coupling (piping) - Wikipedia

    en.wikipedia.org/wiki/Coupling_(piping)

    Alternatively it is a short length of pipe with two female National pipe threads (NPT) (in North American terms, a coupler is a double female while a nipple is double male) or two male or female British standard pipe threads. If the two ends of a coupling are of different standards or joining methods, the coupling is called an adapter. Examples ...

  8. Janney coupler - Wikipedia

    en.wikipedia.org/wiki/Janney_coupler

    The diagram from Beard's 1897 coupler patent [1]. Janney couplers were first patented in 1873 by Eli H. Janney (U.S. patent 138,405). [2] [3] Andrew Jackson Beard was amongst various inventors that made a multitude of improvements to the knuckle coupler; [1] Beard's patents were U.S. patent 594,059 granted 23 November 1897, which then sold for approximately $50,000, and U.S. patent 624,901 ...

  9. Rat-race coupler - Wikipedia

    en.wikipedia.org/wiki/Rat-race_coupler

    Rat-race couplers are used to sum two in-phase combined signals with essentially no loss or to equally split an input signal with no resultant phase difference between its outputs. It is also possible to configure the coupler as a 180 degree phase-shifted output divider or to sum two 180 degree phase-shifted combined signals with almost no loss.