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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.
When coupled, the coupler heads are free to move vertically, which should prevent a derailed car from dragging other cars with it in the event of a derailment on the elevated railway. Uncoupling is done by turning the coupling pin against the spring force with an actuating arm operated by a shunting pole or by a fixed rod with handles that can ...
An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
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 ...
By the 1970s, the company was building vessels as long as 650 ft (200 m) and as wide as 100 ft (30 m). [7] Other postwar business lines included metal water towers , large-scale metal storage tanks, bridges and structural steel for buildings, as well as specialized equipment such as metal slipways for the McNary Dam (1950s), a dry dock for the ...
A commonly used measurement relating to a rail vehicle is its length over headstocks, which is the length of the vehicle excluding its couplings or buffers (if any). [2] Alternative expressions for length over headstocks are length over coupler pulling faces , usually applied to Janney couplers , and length over buffers .