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Narrow gauge flat wagons, 750 mm (2 ft 5 + 1 ⁄ 2 in).Note the single buffer with a hook on the right side and a chain on the other. On some narrow-gauge lines in Europe, and on the Paris Metro, a simplified version of the loose-coupler is used, consisting of a single central buffer with a chain underneath.
Center buffer coupling on the Saxon narrow-gauge railways. With centre buffer couplings, the tasks of buffers are usually transferred to the coupling elements, which are designed to be correspondingly stable and are mounted with interposed spring elements within the vehicle frame instead of on a buffer beam. They are often used on narrow gauge ...
The balance lever coupling, also central buffer coupling with two screw coupling, is a coupler commonly used on narrow gauge railroads with tight curves. By swapping the pulling and pushing devices, the standard screw coupling used on standard gauge railroads became a center buffer coupling with one screw coupling on each side of the buffer.
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.
The Norwegian coupling was developed in Norway about 1870, when the main railway network was built to 1067 mm (3 ft 6 in) narrow gauge. During the 20th century, these lines were rebuilt to 1435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge or closed. Since the rolling stock needed to be replaced, a change was made to buffers and chain couplers.
The balance lever coupling, also known as rocking lever coupling or compensating coupling, is a type of central buffer coupling that has found widespread use, especially in narrow-gauge railways. In Switzerland this type of coupling is called a central buffer with two screw couplings, abbreviated to Zp2, [ 1 ] or referred to as a central buffer ...
A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge narrower than 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge. Most narrow-gauge railways are between 600 mm ( 1 ft 11 + 5 ⁄ 8 in ) and 1,067 mm ( 3 ft 6 in ).
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 ...