The N-2 was also used by the patco Speedline, but was replaced due to issues with the electrical contacts.
The narrow buffers of the left-hand vehicle are sprung, the thicker buffers on the right contain a hydraulic damper.
Norwegian couplings are not particularly strong, and svenska spel poker hud may be supplemented by auxiliary chains.
The updated model N-2 with a larger 4-inch (101.6 mm) gathering range was first applied to the new "Airporter" rapid transit cars on the Cleveland Rapid Transit line.In 1893, satisfied that an automatic coupler could meet the demands of commercial railroad operations and, at the same time, be manipulated safely, the United States Congress passed the Safety Appliance Act.The model N-2 used lightweight draft gear slung below the center sill, to allow for the wide swings required to go around sharp curves.Johnston couplers gradually began to be replaced on the South African Railways from 1927, but not on narrow gauge rolling stock.Between 18, approximately 38 of all railworker accidents involved coupling.The link-and-pin coupling was the original style of coupling used on North American railways.Modern Railways, October 2008,.This allows the modeller to easily standardise on whatever coupling is desired, without individual manufacturers needing to change their coupling type.The links and pins were often pilfered due to their value as scrap metal, resulting in substantial replacement costs.Not all Norwegian couplings are compatible with one another as they vary in height, width, and may or may not be limited to one hook at a time.
However, there is no standard for the placement of these electro-pneumatic connections.
3 shows the trains coupled mechanically and electrically.

The Schaku coupler is superior in many ways to the AAR (Janney/Knuckle) coupler because it makes the electrical and also the pneumatic connections and disconnections automatic.Unicoupler/Intermat edit Unicoupler has been developed by Knorr company from Germany in the 1970s and is widely used in Iran in freight cars.It is the standard coupler type for all passenger trains in Japan as well as on commuter and subway trains in South Korea.The other, the bell-and-hook coupler, was introduced in 1902 and is similar to the Norwegian coupler, but also with a circular coupler face and with a coupler pocket which is open at the top of the coupler face to accommodate the drawhook.This design was used in the transition period The Janney coupler, later the Master Car Builders Association (MCB) coupler, 13 now the Association of American Railroads (AAR) coupler, is also commonly known as a buckeye, knuckle, or Alliance coupler.The first of these were stiff cushions of leather-covered horsehair, later steel springs and then hydraulic damping.Its success in promoting switchyard safety was stunning.While automatic coupling is possible, this rarely happens and manual assistance is required during coupling."Eli Janney - The Janney Coupler".Archived from the original on May 19, 2009.

A coupling adaptor or compromise coupler might couple to an AAR coupling on a wagon, and present, for example, a meatchopper coupler or rapid transit coupler to the next wagon.