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Telegrapher
A telegraphist (British English), telegrapher (American English), or telegraph operator is a person who uses a telegraph key to send and receive Morse code messages in a telegraphy system. These messages, also called telegrams, can be transmitted electronically by land lines, or wirelessly by radio. History During the First World War, the Royal Navy enlisted many volunteers as radio telegraphists. Telegraphists were indispensable at sea in the early days of wireless telegraphy, and many young men were called to sea as professional radiotelegraph operators who were always accorded high-paying officer status at sea. Subsequent to the ''Titanic'' disaster and the Radio Act of 1912, the International Safety of Life at Sea ( SOLAS) conventions established the 500kHz maritime distress frequency monitoring and mandated that all passenger-carrying ships carry licensed radio telegraph operators. Notable telegraphists * Harold Bride * Harold Cottam * Louisa Margaret Dunkley * Thoma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraph Key
A telegraph key, clacker, tapper or morse key is a specialized electrical switch used by a trained operator to transmit text messages in Morse code in a telegraphy system. Keys are used in all forms of electrical telegraph systems, including landline (also called wire) telegraphy and radio (also called wireless) telegraphy. An operator uses the telegraph key to send electrical pulses (or in the case of modern CW, unmodulated radio waves) of two different lengths: short pulses, called ''dots'' or ''dits'', and longer pulses, called ''dashes'' or ''dahs''. These pulses encode the letters and other characters that spell out the message. Types The first telegraph key was invented by Alfred Vail, an associate of Samuel Morse. Since then the technology has evolved and improved, resulting in a range of key designs. Straight keys A ''straight key'' is the common telegraph key as seen in various movies. It is a simple bar with a knob on top and an electrical contact underneat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emma Hunter (telegrapher)
Emma A. Hunter (1831–1904) was an American telegraph operator from West Chester, Pennsylvania. She was hired by the Atlantic and Ohio Telegraph Company in 1851 and worked as a telegrapher until 1868. She is known as the second female telegrapher in Pennsylvania, preceded only by Helen Plummer of Greenville in 1850. Although she was widely noted in her lifetime as the first female telegrapher in the United States, historical research has shown she was not. However, she may have been the first telecommuter, as Thomas Jepsen has argued. Life and career Hunter was born in Meadville, Pennsylvania, in 1831. After her father's death, Hunter's mother Agnes relocated the family to West Chester in 1848. To support herself and her children, she opened a store on Church Street, which sold books and stationery. Emma, along with her brother John, grew up working in the family business, which is where she probably learned her bookkeeping skills. In 1851, local businessman Uriah Hunt P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mary Macaulay
Mary Macaulay (January 27, 1865 – July 19, 1944) was a telegraph operator and labor union official who became International Vice President of the Commercial Telegraphers Union of America (CTUA) in 1919. She was the first woman telegrapher to hold a national elective office in a union. Involvement with telegraphers' unions and the suffrage movement In about 1880, she began work as a commercial operator for Western Union. She joined the telegraphers' union, the Brotherhood of Telegraphers, which was affiliated with the Knights of Labor. She joined in their strike against Western Union in 1883. When the strike ended unsuccessfully, she left Western Union and began work as a press operator in Amsterdam, New York, where she sent and received press dispatches. This was the beginning of a long career as a press telegrapher; she subsequently operated for the ''Rochester Post Express'' in Rochester, New York, the Consolidated wire at the ''Buffalo Evening News'' in Buffalo, New York ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oliver Heaviside
Oliver Heaviside ( ; 18 May 1850 – 3 February 1925) was an English mathematician and physicist who invented a new technique for solving differential equations (equivalent to the Laplace transform), independently developed vector calculus, and rewrote Maxwell's equations in the form commonly used today. He significantly shaped the way Maxwell's equations are understood and applied in the decades following Maxwell's death. His formulation of the telegrapher's equations became commercially important during his own lifetime, after their significance went unremarked for a long while, as few others were versed at the time in his novel methodology. Although at odds with the scientific establishment for most of his life, Heaviside changed the face of telecommunications, mathematics, and science. Early life Heaviside was born in Camden Town, London, at 55 Kings Street (now Plender Street), the youngest of three children of Thomas, a draughtsman and wood engraver, and Rachel Elizabeth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Eckert
Thomas Thompson Eckert (April 23, 1825 – October 20, 1910) was an officer in the U.S. Army, Chief of the War Department Telegraph Staff from 1862 to 1866, United States Assistant Secretary of War from 1866 to 1867 and an executive at Western Union. Early life Thomas Thompson Eckert was born April 23, 1825, in St. Clairsville, Ohio. At a young age, he became interested in the use of the telegraph and the actions of Samuel F.B. Morse. Reading ''The National Intelligencer'' he became fascinated with the proceedings between Morse and Congress in which Morse was granted money to construct an experimental telegraph line. In 1847, after telegraph lines were built from New York to Washington, D.C., Eckert decided to travel to New York in order to see the Morse telegraph in action and became an operator with the Morse Telegraph Company. Eckert then returned home to Ohio and learned how to telegraph. When Eckert returned home, he took a job as an operator at the Wade Telegraph Company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morse Code
Morse code is a telecommunications method which Character encoding, encodes Written language, text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy. International Morse code encodes the 26 ISO basic Latin alphabet, basic Latin letters to , one Diacritic, accented Latin letter (), the Arabic numerals, and a small set of punctuation and procedural signals (Prosigns for Morse code, prosigns). There is no distinction between upper and lower case letters. Each Morse code symbol is formed by a sequence of ''dits'' and ''dahs''. The ''dit'' duration can vary for signal clarity and operator skill, but for any one message, once the rhythm is established, a beat (music), half-beat is the basic unit of time measurement in Morse code. The duration of a ''dah'' is three times the duration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franklin Leonard Pope
Franklin Leonard Pope (December 2, 1840 – October 13, 1895) was an American engineer, explorer, and inventor. Biography He was born in Great Barrington, Massachusetts in December 1840, the son of Ebenezer Pope and Electra Wainwright. He was a telegrapher, electrical engineer, explorer, inventor, and patent attorney. He was also a major contributor to the technological advances of the 19th century. He was one of the leaders of the explorations related to the Collins Overland Telegraph, otherwise known as the Russian American Telegraph. After developing a system which tracked and printed the prices of gold and stocks, Pope partnered with Thomas Edison in 1869, forming the company Pope, Edison & Company Electrical Engineers, and invented a one-wire telegraph in 1870. This telegraph is now known as a stock ticker, and was widely used in large cities for exchange quotations. Pope's partnership with Edison ended shortly after it was formed. Pope was awarded several patents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Edison
Thomas Alva Edison (February11, 1847October18, 1931) was an American inventor and businessman. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. These inventions, which include the phonograph, the motion picture camera, and early versions of the electric Incandescent light bulb, light bulb, have had a widespread impact on the modern industrial society, industrialized world. He was one of the first inventors to apply the principles of organized science and teamwork to the process of invention, working with many researchers and employees. He established the first industrial research laboratory. Edison was raised in the American Midwest. Early in his career he worked as a telegraph operator, which inspired some of his earliest inventions. In 1876, he established his first laboratory facility in Menlo Park, New Jersey, where many of his early inventions were developed. He later established a botanical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraphy
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in China, were generally not capable of transmitting arbitrary text messages. Possible messages were fixed and predetermined, so such systems are thus not true telegraphs. The earliest true telegraph put into widespread use was the Chappe telegraph, an optical telegraph invented by Claude Chappe in the late 18th century. The system was used extensively in France, and European nations occupied by France, during the Napoleonic era. The electric telegraph started to replace the optical telegraph in the mid-19th century. It was first taken up in Britain in the form of the Cooke and Wheatstone telegraph, initially used mostly as an aid to railw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Telegraph
Electrical telegraphy is point-to-point distance communicating via sending electric signals over wire, a system primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called '' telegraphs'', that were devised to send text messages more quickly than physically carrying them. Electrical telegraphy can be considered the first example of electrical engineering. Electrical telegraphy consisted of two or more geographically separated stations, called telegraph offices. The offices were connected by wires, usually supported overhead on utility poles. Many electrical telegraph systems were invented that operated in different ways, but the ones that became widespread fit into two broad categories. First are the needle telegraphs, in which electric current sent down the telegraph line produces electromagnetic force to move a needle-shaped pointer into position o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hiram Percy Maxim
Hiram Percy Maxim (September 2, 1869 – February 17, 1936) was an American radio pioneer and inventor, and co-founder (with Clarence D. Tuska) of the American Radio Relay League (ARRL). Hiram Percy Maxim is credited with inventing and selling the first commercially successful firearm silencer, and also with developing mufflers for internal combustion engines. Early years He was the son of Sir Hiram Maxim, inventor of the Maxim Machine gun. He was the nephew of Hudson Maxim, an inventor of explosives and ballistic propellants. He had two sisters, Florence Maxim, who married George Albert Cutter, and Adelaide Maxim, who married Eldon Joubert, Ignace Paderewski's piano tuner. In 1875, the family moved from Brooklyn, New York, to Fanwood, New Jersey, with his father joining the rest of the family on weekends. At age 17, Hiram was a mechanical engineering graduate, class of 1886, of the Massachusetts Institute of Technology (then a two-year course). He went to work for vari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seeb Chunder Nandy
Seebchunder Nandy or Sib Chandra Nundy (June 1824 – 6 April 1903) was an Indian Bengali telegraphy official who worked on the first telegraph lines established in British India. He helped install and maintain the first telegraph lines between Agra and Calcutta using innovative approaches to reduce the cost of installation. Born in a family of modest means in Calcutta, he worked at the refinery of the Calcutta Mint from 1846 under William Brooke O'Shaughnessy. When O'Shaughnessy started working on the first telegraphic line in India, he made use of Nandy as his assistant. Nandy tested the first line signalling from Diamond Harbour to O'Shaughnessy in Calcutta in a demonstration made to Lord Dalhousie. Nandy later became a line inspector in charge of training signallers. In 1866 he became an assistant superintendent and just before retiring the next year he was given the title of Rai Bahadur on 28 February 1883. Among Nandy's achievements was in the low-cost installation of lines. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
