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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.
The centre of the buffer on European railway vehicles must be between 940 and 1,065 mm above the top of rail. Spain was an exception for a long time. A buffer separation of 1,950 mm was specified there because of the force transmitted to the longitudinal beams of the wagons, which are further apart due to their broad gauge railways.
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 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.
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 ...
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.
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Locomotive 99 1746 of the Weisseritz Valley Railway in Germany TU8 diesel locomotive in Arkhangelsk Oblast, Russia. 750 mm (2 ft 5 + 1 ⁄ 2 in) narrow-gauge railways are very similar to 760 mm (2 ft 5 + 15 ⁄ 16 in) and 2 ft 6 in (762 mm) gauge. 750 mm gauge rolling stock is almost compatible with 760 and 762 mm railways.