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2. Railway coupling - Wikipedia

   en.wikipedia.org/wiki/Railway_coupling

   A link-and-pin coupler Transition era AAR knuckle coupler. The gap in the knuckle accommodates the link of a link and pin coupler and the vertical hole in the knuckle accommodates the pin. Link and pin coupler combined with side buffers on a Panama canal mule. The link-and-pin coupling was the original style of coupling used on North American ...

3. Dual coupling - Wikipedia

   en.wikipedia.org/wiki/Dual_coupling

   (That is also the common way of coupling locomotives to or from wagons, faster than unscrewing the link.) British locomotive-hauled passenger carriages adopted a dual coupling system in the 1950s. They have retractable buffers and a central Buckeye automatic knuckle coupler that lowers to reveal a hook for a screw-type chain coupling. When in ...

4. Railway coupling by country - Wikipedia

   en.wikipedia.org/wiki/Railway_coupling_by_country

   Buffers and chain coupler from 1859 to 1873. [22]Johnston link-and-pin from 1873 to 1927 on Cape gauge, from 1906 on 2 ft (610 mm) narrow gauge in Natal. [23] [24]Bell-and-hook from 1902 on 2 ft (610 mm) narrow gauge in the Cape of Good Hope.

5. Buffers and chain coupler - Wikipedia

   en.wikipedia.org/wiki/Buffers_and_chain_coupler

   An improvement on the loose-coupled train is the "Instanter" coupling, in which the middle link of a three-link chain is specially triangular shaped, so that when lying "prone" it provides enough slack to make coupling possible, but when the middle link is rotated 90 degrees, the length of the chain is effectively shortened, reducing the amount ...

6. William Dana Ewart - Wikipedia

   en.wikipedia.org/wiki/William_Dana_Ewart

   William Dana Ewart (April 24, 1851 – May 3, 1908) invented and patented the linked belt, a square detachable link for chain belts, on September 1, 1874.The metal chain "linked belt" replaced the leather and strap belts used on agricultural equipment at the time.

7. Janney coupler - Wikipedia

   en.wikipedia.org/wiki/Janney_coupler

   Janney was a dry goods clerk and former Confederate Army officer from Alexandria, Virginia, who used his lunch hours to whittle from wood an alternative to the link and pin coupler. The term Buckeye comes from the nickname of the US state of Ohio, the "Buckeye state" and the Ohio Brass Company [19] which originally marketed the coupling. [12] [20]