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The idea of a hex socket screw drive was probably conceived as early as the 1860s to the 1890s, but such screws were probably not manufactured until around 1910. Rybczynski (2000) describes a flurry of patents for alternative drive types in the 1860s to the 1890s in the U.S., [2] which are confirmed to include internal-wrenching square and triangle types (that is, square and triangular sockets ...
This is a category for all broad gauge railways built with a track gauge of 7 ft (2,134 mm) Brunel gauge, as used for Brunel's Great Western Railway. This gauge later was defined being 7 ft 1 ⁄ 4 in (2,140 mm).
Rugga wagons were primarily produced for 2 ft (610 mm) and 600 mm (1 ft 11 + 5 ⁄ 8 in) gauges, but like all Hudson products, could be manufactured to any gauge required. Rugga wagons were built in a range of sizes from the smallest at 13.5 cu ft or 0.50 cu yd or 0.38 m 3 up to a huge 54 cu ft or 2.0 cu yd or 1.5 m 3 .
In the center of the screw is the handle housing with a hinged ball handle attached. This turnbuckle style arrangement allows the vehicles to be pulled together by tightening the screw with the attached handle. Typically, the screw is tightened until there are two threads left next to the handle housing.
Key This list covers the 7 ft (2,134 mm) broad gauge locomotives of the following railways: BGR - Bristol and Gloucester Railway; CCR - Carmarthen and Cardigan Railway; GWR - Great Western Railway; LVR - Llynvi Valley Railway; NCJR - Newquay and Cornwall Junction Railway; NDR - North Devon Railway; SDR - South Devon Railway; SWMR - South Wales ...
There are four 7 feet gauge locomotives in the United Kingdom: Fire Fly - a replica Great Western Railway 2-2-2; Iron Duke - a replica Great Western Railway 4-2-2; North Star - a non-working replica Great Western Railway 2-2-2; Tiny - a surviving South Devon Railway 0-4-0VB