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Inventor Of The Telephone
The invention of the telephone was the culmination of work done by more than one individual, and led to an array of lawsuits relating to the patent claims of several individuals and numerous companies. Notable people included in this were Antonio Meucci, Philipp Reis, Elisha Gray and Alexander Graham Bell. Early development The concept of the telephone dates back to the string telephone or lover's telephone that has been known for centuries, comprising two diaphragms connected by a taut string or wire. Sound waves are carried as mechanical vibrations along the string or wire from one diaphragm to the other. The classic example is the tin can telephone, a children's toy made by connecting the two ends of a string to the bottoms of two metal cans, paper cups or similar items. The essential idea of this toy was that a diaphragm can collect voice sounds for reproduction at a distance. One precursor to the development of the electromagnetic telephone originated in 1833 when Carl F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museo Nazionale Scienza E Tecnologia Leonardo Da Vinci
Museo Nazionale Scienza e Tecnologia Leonardo da Vinci in Milan, dedicated to painter and scientist Leonardo da Vinci, is the largest science and technology museum in Italy. It was opened on 15 February 1953 and inaugurated by prime minister of Italy, Prime Minister Alcide De Gasperi. The museum, in the ancient monastery of San Vittore al Corpo, Milan, San Vittore al Corpo in Milan, is divided into seven main departments: * Materials * Transport * Energy (including Thermal power station Regina Margherita) * Communication * Leonardo da Vinci, Art & Science * New Frontiers * Science for young people Each of these departments have laboratories, especially for children and young students. The Transport section is made up of four different parts: air, rail, water and Toti class submarine, Submarine Enrico Toti-S-506. Materials section The Materials section treats the life cycle of modern products from raw materials to recycling. Specific sections are dedicated to polymeric and syn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Davy
Edward Davy (16 June 1806 – 26 January 1885) was an English physician, scientist, and inventor who played a prominent role in the development of telegraphy, and invented an electric relay. Davy was born in Ottery St Mary, Devonshire, England, son of Thomas Davy (medical practitioner and house surgeon at Guy's Hospital, London). Edward Davy was educated at a school run by his maternal uncle in Tower Street, London. He was then apprenticed to Dr C. Wheeler, house surgeon at St Bartholomew's Hospital. Davy won the prize for botany in 1825, was licensed by the Worshipful Society of Apothecaries in 1828 and the Royal College of Surgeons in 1829. Soon after graduating, Davy began trading as an operative chemist under the name of Davy & Co. In 1836 he published a small book ''Experimental Guide to Chemistry'', at the end of which was a catalogue of goods supplied by his firm. Davy is distantly related to Humphry Davy. Davy published ''Outline of a New Plan of Telegraphic Commu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
37th Canadian Parliament
The 37th Canadian Parliament was in session from January 29, 2001, until May 23, 2004. The membership was set by the 2000 federal election on November 27, 2000, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 2004 election. It was controlled by a Liberal Party majority, led first by Prime Minister Jean Chrétien and the 26th Canadian Ministry, and then by Prime Minister Paul Martin and the 27th Canadian Ministry. The Official Opposition was formed by first the Canadian Alliance, led by Stockwell Day and then by Stephen Harper, and then by its successor party, the Conservative Party, also led by Harper. The Speaker was Peter Milliken. See also list of Canadian electoral districts 1996-2003 for a list of the ridings in this parliament. There were three sessions of the 37th Parliament: Party standings The party standings as of the election and as of dissolution were as follows: In 2001, 13 MPs opposed to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States House Of Representatives
The United States House of Representatives is a chamber of the Bicameralism, bicameral United States Congress; it is the lower house, with the U.S. Senate being the upper house. Together, the House and Senate have the authority under Article One of the United States Constitution, Article One of the Constitution of the United States, U.S. Constitution to pass or defeat federal legislation, known as Bill (United States Congress), bills. Those that are also passed by the Senate are sent to President of the United States, the president for signature or veto. The House's exclusive powers include initiating all revenue bills, Impeachment in the United States, impeaching federal officers, and Contingent election, electing the president if no candidate receives a majority of votes in the United States Electoral College, Electoral College. Members of the House serve a Fixed-term election, fixed term of two years, with each seat up for election before the start of the next Congress. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADT Security Services
ADT Inc., formerly the ADT Corporation, is an American security company that provides residential and small business electronic security, fire protection, and other related alarm monitoring services throughout the United States. The corporate head office is located in Boca Raton, Florida. In February 2016, the company was acquired by Apollo Global Management for $6.9billion in a leveraged buyout. In January 2018, the company went public on the New York Stock Exchange. History In 1863, Edward A. Calahan invented a stock ticker and formed the Gold and Stock Telegraph Company in 1867 to exploit the technology. Gold and Stock also developed a messenger system that sent instructions to and from the stock exchange floor. Three years later, the president of Gold and Stock Telegraph Company woke up to a burglar in his home, which inspired him to create a telegraph-based alert system. This system eventually connected 50 of his neighbors to a central station, where all the alert box ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidetone
Sidetone is audible feedback to someone speaking or otherwise producing sound as an indication of active transmission. Sidetone is introduced by some communications circuits and anti-sidetone circuitry is used to control its level. Sidetone is expected behavior for telephone systems. Absence of sidetone can cause users to believe the call has been dropped or cause them to speak loudly. Too much sidetone can cause users to speak softly. Telephony In telephony, sidetone is the effect of sound picked up by the telephone's transmitter (mouthpiece) and instantly introduced at a low electronic signal level into the receiver (earpiece) of the same handset, a form of electrical feedback through the telephone hybrid.AT&T, ''Bell System Practices'', Section C30.001 Issue 1 (March 16, 1932) ''Common Battery Anti-Sidetone Stations'' Sidetone in early 19th century telephones was strong due to the type of circuit used in instruments. Anti-sidetone circuitry in the telephone hybrid brought sideto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tin Can Telephone
A tin can phone is a type of Acoustics, acoustic (non-electrical) speech-transmitting device made up of two tin cans, paper cups or similarly shaped items attached to either end of a taut string or wire. It is a particular case of mechanical telephony, where sound (i.e., vibrations in the air) is converted into vibrations along a Transmission medium, liquid or solid medium. These vibrations are transmitted through the medium (string) and then converted back to sound. History Before the invention of the telephone, electromagnetic telephone, there were mechanical acoustic devices for transmitting spoken words and music over a greater distance, faster than the speed of sound in air. The very earliest mechanical telephones were based on transmission through Speaking tube, pipes or other Transmission medium, physical media, and among the very earliest experiments were those conducted by the British physicist and polymath Robert Hooke from 1664 to 1685.McVeigh, Daniel PAn Early Histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Havana, Cuba
Havana (; ) is the capital and largest city of Cuba. The heart of La Habana Province, Havana is the country's main port and commercial center.Cuba ''The World Factbook''. Central Intelligence Agency. It is the most populous city, the largest by area, and the List of metropolitan areas in the West Indies, second largest metropolitan area in the Caribbean region. The population in 2012 was 2,106,146 inhabitants, and its area is for the capital city side and 8,475.57 km2 for the metropolitan zone. Its official population was 1,814,207 inhabitants in 2023. Havana was founded by the Spanish Empire, Spanish in the 16th century. It served as a springboard for the Spanish colonization of the Americas, Spanish conquest of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Staten Island
Staten Island ( ) is the southernmost of the boroughs of New York City, five boroughs of New York City, coextensive with Richmond County and situated at the southernmost point of New York (state), New York. The borough is separated from the adjacent state of New Jersey by the Arthur Kill and the Kill Van Kull and from the rest of New York by New York Bay. With a population of 495,747 in the 2020 United States census, 2020 Census, Staten Island is the least populated New York City borough but the third largest in land area at ; it is also the least densely populated and most suburban borough in the city. A home to the Lenape Native Americans, the island was settled by Dutch colonists in the 17th century. It was one of the 12 original counties of New York state. Staten Island was City of Greater New York, consolidated with New York City in 1898. It was formerly known as the Borough of Richmond until 1975, when its name was changed to Borough of Staten Island. Staten Island has so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patent Caveat
A patent caveat, often shortened to caveat, was a legal document filed with the United States Patent and Trademark Office, United States Patent Office. History Caveats were instituted by the US Patent Act of 1836, U.S. Patent Act of 1836, but were discontinued in 1909, with the United States Congress, U.S. Congress abolishing the system formally in 1910. A caveat was similar to a patent application with a description of an invention and patent drawing, drawings, but without examination for patentable subject matter and without a requirement for claim (patent), patent claims. A patent caveat was an official notice of intention to file a patent application at a later date. A caveat expired after one year, but could be renewed by paying an annual renewal fee, annual fee of $10. Caveats were similar to provisional applications used today in the United States Patent and Trademark Office (USPTO) which also expire after one year. However, provisional applications today are non-renewab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Bourseul
Charles Bourseul (28 April 1829 – 23 November 1912) was a pioneer in development of the "make and break" telephone about 20 years before Bell made a practical telephone. Life Bourseul was born in Brussels, Belgium, and grew up in Douai, France. His father was a French army officer. Charles worked for the telegraph company as a civil engineer and mechanic. He made improvements to the telegraph system of L. F. Breguet (a French instrument maker) and Samuel F. B. Morse. Charles Bourseul experimented with the electrical transmission of the human voice and developed an electromagnetic microphone, but his telephone receiver was unable to convert electric current back into clear human voice sounds. On the telephone In 1854 Bourseul wrote a memorandum on the transmission of the human voice by electric currents that was first published in a magazine '' L'Illustration'' (Paris), though no prototype was built. That is about the same time that Meucci later claimed to have creat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automaton
An automaton (; : automata or automatons) is a relatively self-operating machine, or control mechanism designed to automatically follow a sequence of operations, or respond to predetermined instructions. Some automata, such as bellstrikers in mechanical clocks, are designed to give the illusion to the casual observer that they are operating under their own power or will, like a mechanical robot. The term has long been commonly associated with automated puppets that resemble moving humans or animals, built to impress and/or to entertain people. Animatronics are a modern type of automata with electronics, often used for the portrayal of characters or creatures in films and in theme park attractions. Etymology The word ' is the latinization of the Ancient Greek (), which means "acting of one's own will". It was first used by Homer to describe an automatic door opening, or automatic movement of wheeled tripods. It is more often used to describe non-electronic moving machines, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
