re-laying of rails

laying ['leɪɪŋ]

noun

(a) (of egg) ponte f

(b) (of cables, carpets, rails, pipes) pose f; (of mine) pose f, mouillage m; (of wreath) dépôt m;

∎ a wreath-laying ceremony un dépôt de gerbe;

∎ Religion laying on of hands imposition f des mains

►► laying down (of principle, rule etc) établissement m; (of sewage system, cable) pose f; (of ship) mise f en chantier ou sur cale; (of arms) dépôt m;

laying hen poule f pondeuse;

laying out (of dead body) toilette f

перекладання (колії)

перекладка (пути и т. п.)

1) машина; станок; двигатель; механизм

2) организационный аппарат

3) машинный

4) механически обрабатывать; обрабатывать на станке

•

- angle-bending machine

* * *

машина; станок; механизм; устройство; установка

SUBJECT AREA: Land transport, Mining and extraction technology, Railways and locomotives

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The Wylam wagonway passed Newburn, and Hedley, who went to school at Wylam, must have been familiar with this wagonway from childhood. It had been built c.1748 to carry coal from Wylam Colliery to the navigable limit of the Tyne at Lemington. In 1805 Hedley was appointed viewer, or manager, of Wylam Colliery by Christopher Blackett, who had inherited the colliery and wagonway in 1800. Unlike most Tyneside wagonways, the gradient of the Wylam line was insufficient for loaded wagons to run down by gravity and they had to be hauled by horses. Blackett had a locomotive, of the type designed by Richard Trevithick, built at Gateshead as early as 1804 but did not take delivery, probably because his wooden track was not strong enough. In 1808 Blackett and Hedley relaid the wagonway with plate rails of the type promoted by Benjamin Outram, and in 1812, following successful introduction of locomotives at Middleton by John Blenkinsop, Blackett asked Hedley to investigate the feasibility of locomotives at Wylam. The expense of re-laying with rack rails was unwelcome, and Hedley experimented to find out the relationship between the weight of a locomotive and the load it could move relying on its adhesion weight alone. He used first a model test carriage, which survives at the Science Museum, London, and then used a full-sized test carriage laden with weights in varying quantities and propelled by men turning handles. Having apparently satisfied himself on this point, he had a locomotive incorporating the frames and wheels of the test carriage built. The work was done at Wylam by Thomas Waters, who was familiar with the 1804 locomotive, Timothy Hackworth, foreman smith, and Jonathan Forster, enginewright. This locomotive, with cast-iron boiler and single cylinder, was unsatisfactory: Hackworth and Forster then built another locomotive to Hedley's design, with a wrought-iron return-tube boiler, two vertical external cylinders and drive via overhead beams through pinions to the two axles. This locomotive probably came into use in the spring of 1814: it performed well and further examples of the type were built. Their axle loading, however, was too great for the track and from about 1815 each locomotive was mounted on two four-wheeled bogies, the bogie having recently been invented by William Chapman. Hedley eventually left Wylam in 1827 to devote himself to other colliery interests. He supported the construction of the Clarence Railway, opened in 1833, and sent his coal over it in trains hauled by his own locomotives. Two of his Wylam locomotives survive— Puffing Billy at the Science Museum, London, and Wylam Dilly at the Royal Museum of Scotland, Edinburgh—though how much of these is original and how much dates from the period 1827–32, when the Wylam line was re-laid with edge rails and the locomotives reverted to four wheels (with flanges), is a matter of mild controversy.

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See also: Stephenson, George

SUBJECT AREA: Electricity, Land transport, Railways and locomotives

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Werner von Siemens was the eldest of a large family and after the early death of his parents took his place at its head. He served in the Prussian artillery, being commissioned in 1839, after which he devoted himself to the study of chemistry and physics. In 1847 Siemens and J.G. Halske formed a company, Telegraphen-Bauanstalt von Siemens und Halske, to manufacture a dial telegraph which they had developed from an earlier instrument produced by Charles Wheatstone. In 1848 Siemens obtained his discharge from the army and he and Halske constructed the first long-distance telegraph line on the European continent, between Berlin and Frankfurt am Main.

Werner von Siemens's younger brother, William Siemens, had settled in Britain in 1844 and was appointed agent for the Siemens \& Halske company in 1851. Later, an English subsidiary company was formed, known from 1865 as Siemens Brothers. It specialized in manufacturing and laying submarine telegraph cables: the specialist cable-laying ship Faraday, launched for the purpose in 1874, was the prototype of later cable ships and in 1874–5 laid the first cable to run direct from the British Isles to the USA. In charge of Siemens Brothers was another brother, Carl, who had earlier established a telegraph network in Russia.

In 1866 Werner von Siemens demonstrated the principle of the dynamo in Germany, but it took until 1878 to develop dynamos and electric motors to the point at which they could be produced commercially. The following year, 1879, Werner von Siemens built the first electric railway, and operated it at the Berlin Trades Exhibition. It comprised an oval line, 300 m (985 it) long, with a track gauge of 1 m (3 ft 3 1/2 in.); upon this a small locomotive hauled three small passenger coaches. The locomotive drew current at 150 volts from a third rail between the running rails, through which it was returned. In four months, more than 80,000 passengers were carried. The railway was subsequently demonstrated in Brussels, and in London, in 1881. That same year Siemens built a permanent electric tramway, 1 1/2 miles (2 1/2 km) long, on the outskirts of Berlin. In 1882 in Berlin he tried out a railless electric vehicle which drew electricity from a two-wire overhead line: this was the ancestor of the trolleybus.

In the British Isles, an Act of Parliament was obtained in 1880 for the Giant's Causeway Railway in Ireland with powers to work it by "animal, mechanical or electrical power"; although Siemens Brothers were electrical engineers to the company, of which William Siemens was a director, delays in construction were to mean that the first railway in the British Isles to operate regular services by electricity was that of Magnus Volk.

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