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Some 6 A 3 pin sockets also have two extra holes above the line and neutral holes to allow a 5 A 2-pin plug to be connected. This ensures that nothing can be inserted alongside a pin when the plug is in use and helps keep fingers away from the pins. In 1934 the dual plug system was introduced with the socket rated at 15 A and three sizes of plug, fused 2 A and 5 A plugs and a 15 A plug. Western Union’s decision to allow Bell to gain the advantage in telephone technology was the result of Western Union’s upper management’s failure to foresee the surpassing of the telephone over the, at the time, dominant telegraph system. This early system required the receiver to be present in real time to record the message and it reached speeds of up to 15 words a minute. The telegraph isolated the message (information) from the physical movement of objects or the process. Worldwide telegraphy changed the gathering of information for news reporting. Telegraphy facilitated the growth of organizations “in the railroads, consolidated financial and commodity markets, and reduced information costs within and between firms”. 248 The decline began with the growth of the use of the telephone.
204 The decline was briefly postponed by the rise of special occasion congratulatory telegrams. Following the introduction of BS 4573 in 1970 there were no longer any UK domestic uses for two-pin sockets except for shavers, so BS 372 was renamed “Two-pin Side-entry Wall Plugs And Sockets For Special Circuits” and subsequently withdrawn. In many countries, this situation continued after the introduction of the electric telegraph. A fused 13 A version of this continued to be available after the introduction of BS 1363, illustrating that BS 546 was not used exclusively at any time. The spread of the railways created a need for an accurate standard time to replace local standards based on local noon. The current revision of the standard allows optional shutters similar to those of BS 1363. Current UK wiring regulations require socket outlets installed in homes to be shuttered. Starting in Germany and the UK, electric telegraph lines were installed by railway companies. Optical telegraph lines were installed by governments, often for a military purpose, and reserved for official use only. To combat this issue, the bureau offered telegraph customers the option to register unique code names for their telegraph addresses.
In 1919, the Central Bureau for Registered Addresses was established in the financial district of New York City. The bureau was created to ease the growing problem of messages being delivered to the wrong recipients. The insurance provider says it is the same sort of scenario as a customer putting the wrong fuel in their internal combustion engine car, with insurers covering these claims as accidental damage also. Nevertheless, the jobs were popular with women for the same reason as in the US; most other work available for women was very poorly paid. Different size wires may be used in the same raceway so long as they are all insulated for the maximum voltage of any of these circuits. Electrical cables may be made more flexible by stranding the wires. And more are coming onboard, with at least 32 councils saying they will install their first on-street charges before the end of 2021, including; Durham, Essex, Plymouth and Chesterfield. All wiring in a circuit except for the leads that are part of a device or fixture must be of the required gauge or larger. 253 Ironically, the invention of the telephone grew out of the development of the harmonic telegraph, a device which was supposed to increase the efficiency of telegraph transmission and improve the profits of telegraph companies.
The two companies met at Promontory Summit, Utah, north of the Great Salt Lake, in May, 1869. The site is now known as the Golden Spike National Historic Site, operated by the National Park Service with the assistance of volunteers who act as docents, exhibit-makers, locomotive engineers, and locomotive firemen. 274-75 Messages and information would now travel far and wide, and the telegraph demanded a language “stripped of the local, the regional; and colloquial”, to better facilitate a worldwide media language. 277 In the modern era, the telegraph that began in 1837 has been gradually replaced by digital data transmission based on computer information systems. As telegrams have been traditionally charged by the word, messages were often abbreviated to pack information into the smallest possible number of words, in what came to be called “telegram style”. At the end of the 19th century, the average length of a German telegram was calculated as 14.2 words. Telex development began in Germany in 1926, becoming an operational service in 1933 run by the Reichspost (the German imperial postal service). Where telegram services still exist, the transmission method between offices is no longer by telegraph, but by telex or IP link.
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