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History of the telephone
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Actor portraying Alexander Graham Bell in a 1926 silent film. Shows Bell's first telephone transmitter (microphone), invented 1876 and first displayed at the Centennial Exposition, Philadelphia.
This history of the telephone chronicles the development of the electrical telephone, and includes a brief review of its predecessors.
Contents
1 Telephone prehistory
1.1 Mechanical devices
1.2 Electrical devices
2 Invention of the telephone
2.1 Telephone exchange
3 Early telephone developments
4 Early commercial instruments
5 20th century developments
6 Women's usage in the 20th century
7 21st century developments
8 See also
9 References
10 Further reading
11 External links
Telephone prehistory[edit]
Mechanical devices[edit]
A 19th century acoustic tin can or "lovers' telephone"
Before the invention of electromagnetic telephones, mechanical acoustic devices existed for transmitting speech and music over a distance greater than that of normal direct speech. The earliest mechanical telephones were based on sound transmission through pipes or other physical media.[1] The acoustic tin can telephone, or "lovers' phone", has been known for centuries. It connects two diaphragms with a taut string or wire, which transmits sound by mechanical vibrations from one to the other along the wire (and not by a modulated electric current). The classic example is the children's toy made by connecting the bottoms of two paper cups, metal cans, or plastic bottles with tautly held string.[1][2]
Among the earliest known experiments were those conducted by the British physicist and polymath Robert Hooke from 1664 to 1685.[1][3] An acoustic string phone made in 1667 is attributed to him.[4]
For a few years in the late 1800s, acoustic telephones were marketed commercially as a niche competitor to the electrical telephone. When the Bell telephone patents expired and many new telephone manufacturers began competing, acoustic telephone makers quickly went out of business. Their maximum range was very limited.[2] An example of one such company was the Pulsion Telephone Supply Company created by Lemuel Mellett in Massachusetts, which designed its version in 1888 and deployed it on railroad right-of-ways.
Additionally, speaking tubes have long been common, especially within buildings and aboard ships, and are still in use today. [5]
Electrical devices[edit]
Main article: Electrical telegraph
The telephone emerged from the making and successive improvements of the electrical telegraph. In 1804, Spanish polymath and scientist Francisco Salva Campillo constructed an electrochemical telegraph.[6] The first working telegraph was built by the English inventor Francis Ronalds in 1816 and used static electricity.[7] An electromagnetic telegraph was created by Baron Schilling in 1832. Carl Friedrich Gauss and Wilhelm Weber built another electromagnetic telegraph in 1833 in Göttingen.
Bell prototype telephone stampCentennial Issue of 1976
The electrical telegraph was first commercialised by Sir William Fothergill Cooke and entered use on the Great Western Railway in England. It ran for 13 mi (21 km) from Paddington station to West Drayton and came into operation on April 9, 1839.
Another electrical telegraph was independently developed and patented in the United States in 1837 by Samuel Morse. His assistant, Alfred Vail, developed the Morse code signaling alphabet with Morse. America's first telegram was sent by Morse on January 6, 1838, across 2 miles (3 km) of wiring.
Invention of the telephone[edit]
Main article: Invention of the telephone
Credit for the invention of the electric telephone is frequently disputed, and new controversies over the issue have arisen from time to time. Charles Bourseul, Innocenzo Manzetti, Antonio Meucci, Johann Philipp Reis, Alexander Graham Bell, and Elisha Gray, amongst others, have all been credited with the telephone's invention. The early history of the telephone became and still remains a confusing morass of claims and counterclaims, which were not clarified by the huge mass of lawsuits to resolve the patent claims of many individuals and commercial competitors. The Bell and Edison patents, however, were commercially decisive, because they dominated telephone technology and were upheld by court decisions in the United States.
Antonio Meucci, 1854, constructed telephone-like devices.
Johann Philipp Reis, 1860, constructed prototype 'make-and-break' telephones, today called Reis telephone.
Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876.
Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois.
Tivadar Puskás proposed the telephone switchboard exchange in 1876.
Thomas Edison invented the carbon microphone which produced a strong telephone signal.
The modern telephone is the result of work of many people.[8] Alexander Graham Bell was, however, the first to patent the telephone, as an "apparatus for transmitting vocal or other sounds telegraphically". Bell has most often been credited as the inventor of the first practical telephone. However, in Germany Johann Philipp Reis is seen as a leading telephone pioneer who stopped only just short of a successful device, and as well the Italian-American inventor and businessman Antonio Meucci has been recognized by the U.S. House of Representatives for his contributory work on the telephone.[9] Several other controversies also surround the question of priority of invention for the telephone.
The Elisha Gray and Alexander Bell telephone controversy considers the question of whether Bell and Gray invented the telephone independently and, if not, whether Bell stole the invention from Gray. This controversy is narrower than the broader question of who deserves credit for inventing the telephone, for which there are several claimants.
The Canadian Parliamentary Motion on Alexander Graham Bell article reviews the controversial June 2002 United States House of Representatives resolution recognizing Meucci's contributions 'in' the invention of the telephone (not 'for' the invention of the telephone). The same resolution was not passed in the U.S. Senate, thus labeling the House resolution as "political rhetoric". A subsequent counter-motion was unanimously passed in Canada's Parliament 10 days later which declared Bell its inventor. This webpage examines critical aspects of both the parliamentary motion and the congressional resolution.
Telephone exchange[edit]
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The main users of the electrical telegraph were post offices, railway stations, the more important governmental centers (ministries), stock exchanges, very few nationally distributed newspapers, the largest internationally important corporations, and wealthy individuals.[10] Telegraph exchanges worked mainly on a store and forward basis. Although telephones devices were in use before the invention of the telephone exchange, their success and economical operation would have been impossible with the schema and structure of the contemporary telegraph systems.
Prior to the invention of the telephone switchboard, pairs of telephones were connected directly with each other, which was primarily useful for connecting a home to the owner's business.[11] A telephone exchange provides telephone service for a small area. Either manually by operators, or automatically by machine switching equipment, it interconnects individual subscriber lines for calls made between them. This made it possible for subscribers to call each other at homes, businesses, or public spaces. These made telephony an available and comfortable communication tool for many purposes, and it gave the impetus for the creation of a new industrial sector.
The telephone exchange was an idea of the Hungarian engineer Tivadar Puskás (1844 - 1893) in 1876, while he was working for Thomas Edison on a telegraph exchange.[12][13][14][15][16] The first commercial telephone exchange was opened at New Haven, Connecticut, with 21 subscribers on 28 January 1878,[17] in a storefront of the Boardman Building in New Haven, Connecticut. George W. Coy designed and built the world's first switchboard for commercial use. Coy was inspired by Alexander Graham Bell's lecture at the Skiff Opera House in New Haven on 27 April 1877.[17]
In Bell's lecture, during which a three-way telephone connection with Hartford and Middletown, Connecticut, was demonstrated, he first discussed the idea of a telephone exchange for the conduct of business and trade. On 3 November 1877, Coy applied for and received a franchise from the Bell Telephone Company for New Haven and Middlesex Counties. Coy, along with Herrick P. Frost and Walter Lewis, who provided the capital, established the District Telephone Company of New Haven on 15 January 1878.[17]
The switchboard built by Coy was, according to one source, constructed of "carriage bolts, handles from teapot lids and bustle wire." According to the company records, all the furnishings of the office, including the switchboard, were worth less than forty dollars. While the switchboard could connect as many as sixty-four customers, only two conversations could be handled simultaneously and six connections had to be made for each call.[17]
The District Telephone Company of New Haven went into operation with only twenty-one subscribers, who paid $1.50 per month. By 21 February 1878, however, when the first telephone directory was published by the company, fifty subscribers were listed. Most of these were businesses and listings such as physicians, the police, and the post office; only eleven residences were listed, four of which were for persons associated with the company.[17]
The New Haven District Telephone Company grew quickly and was reorganized several times in its first years. By 1880, the company had the right from the Bell Telephone Company to service all of Connecticut and western Massachusetts. As it expanded, the company was first renamed Connecticut Telephone, and then Southern New England Telephone in 1882.[17] The site of the first telephone exchange was granted a designation as a National Historic Landmark on 23 April 1965. However it was withdrawn in 1973 in order to demolish the building and construct a parking garage.[17]
Further information: Telephone switchboard
Early telephone developments[edit]
Main article: Timeline of the telephone
See also: History of telecommunication
The following is a brief summary of the history of the development of the telephone:
Antonio Meucci's telephone.
A French Gower telephone of 1912 at the Musée des Arts et Métiers in Paris
1667: Robert Hooke invented a string telephone that conveyed sounds over an extended wire by mechanical vibrations. It was to be termed an 'acoustic' or 'mechanical' (non-electrical) telephone.
1753: Charles Morrison proposes the idea that electricity can be used to transmit messages, by using different wires for each letter.[18]
1844: Innocenzo Manzetti first mooted the idea of a "speaking telegraph" (telephone).
1854: Charles Bourseul writes a memorandum on the principles of the telephone. (See the article: "Transmission électrique de la parole", L'Illustration, Paris, 26 August 1854.)
1854: Antonio Meucci demonstrates an electric voice-operated device in New York; it is not clear what kind of device he demonstrated.
1861: Philipp Reis constructs the first speech-transmitting telephone
28 December 1871: Antonio Meucci files a patent caveat (No. 3353, a notice of intent to invent, but not a formal patent application) at the U.S. Patent Office for a device he named "Sound Telegraph".[19]
1872: Elisha Gray establishes Western Electric Manufacturing Company.
1 July 1875: Bell uses a bi-directional "gallows" telephone that was able to transmit "voicelike sounds", but not clear speech. Both the transmitter and the receiver were identical membrane electromagnet instruments.
1875: Thomas Edison experiments with acoustic telegraphy and in November builds an electro-dynamic receiver, but does not exploit it.
1875: Hungarian Tivadar Puskas (the inventor of telephone exchange) arrived in the USA.
6 April 1875: Bell's U.S. Patent 161,739 "Transmitters and Receivers for Electric Telegraphs" is granted. This uses multiple vibrating steel reeds in make-break circuits, and the concept of multiplexed frequencies.
20 January 1876: Bell signs and notarizes his patent application for the telephone.
11 February 1876: Elisha Gray designs a liquid transmitter for use with a telephone, but does not build one.
7 March 1876: Bell's U.S. patent No. 174,465 for the telephone is granted.
10 March 1876: Bell transmits the sentence: "Mr. Watson, come here! I want to see you!" using a liquid transmitter and an electromagnetic receiver.
30 January 1877: Bell's U.S. patent No. 186,787 is granted for an electromagnetic telephone using permanent magnets, iron diaphragms, and a call bell.
27 April 1877: Edison files for a patent on a carbon (graphite) transmitter. Patent No. 474,230 was granted on 3 May 1892, after a 15-year delay because of litigation. Edison was granted patent No. 222,390 for a carbon granules transmitter in 1879.
6 October 1877: the Scientific American publishes the invention from Bell - at that time still without a ringer.
25 October 1877: the article in the Scientific American is discussed at the Telegraphenamt in Berlin
12 November 1877: The first commercial telephone company enters telephone business in Friedrichsberg close to Berlin[20] using the Siemens pipe as ringer and telephone devices built by Siemens.
1877: The first experimental Telephone Exchange in Boston.
1877: First long-distance telephone line
1877:Emile Berliner invented the telephone transmitter.
28 January 1878: The first commercial US telephone exchange opened in New Haven, Connecticut.
1887: Tivadar Puskás introduced the multiplex switchboard.
1915: First U.S. coast-to-coast long-distance telephone call, ceremonially inaugurated by A.G. Bell in New York City and his former assistant Thomas Augustus Watson in San Francisco, California.
Early commercial instruments[edit]
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1917 wall telephone, open to show magneto and local battery
Early telephones were technically diverse. Some used liquid transmitters which soon went out of use. Some were dynamic: their diaphragms vibrated a coil of wire in the field of a permanent magnet or vice versa. Such sound-powered telephones survived in small numbers through the 20th century in military and maritime applications where the ability to create its own electrical power was crucial. Most, however, used Edison/Berliner carbon transmitters, which were much louder than the other kinds, even though they required induction coils, actually acting as impedance matching transformers to make it compatible to the line impedance. The Edison patents kept the Bell monopoly viable into the 20th century, by which time telephone networks were more important than the instrument.
Early telephones were locally powered, using a dynamic transmitter or else powering the transmitter with a local battery. One of the jobs of outside plant personnel was to visit each telephone periodically to inspect the battery. During the 20th century, "common battery" operation came to dominate, powered by "talk battery" from the telephone exchange over the same wires that carried the voice signals. Late in the century, wireless handsets brought a revival of local battery power.
The earliest telephones had only one wire for both transmitting and receiving of audio, and used a ground return path, as was found in telegraph systems. The earliest dynamic telephones also had only one opening for sound, and the user alternately listened and spoke (rather, shouted) into the same hole. Sometimes the instruments were operated in pairs at each end, making conversation more convenient but also more expensive.
Historical marker commemorating the first telephone central office in New York State (1878)
At first, the benefits of a switchboard exchange were not exploited. Instead, telephones were leased in pairs to the subscriber, for example one for his home and one for his shop, and the subscriber had to arrange with telegraph contractors to construct a line between them. Users who wanted the ability to speak to three or four different shops, suppliers etc. would obtain and set up three or four pairs of telephones. Western Union, already using telegraph exchanges, quickly extended the principle to its telephones in New York City and San Francisco, and Bell was not slow in appreciating the potential.
Signaling began in an appropriately primitive manner. The user alerted the other end, or the exchange operator, by whistling into the transmitter. Exchange operation soon resulted in telephones being equipped with a bell, first operated over a second wire and later with the same wire using a condenser. Telephones connected to the earliest Strowger automatic exchanges had seven wires, one for the knife switch, one for each telegraph key, one for the bell, one for the push button and two for speaking.
Rural and other telephones that were not on a common battery exchange had hand cranked "magneto" generators to produce an alternating current to ring the bells of other telephones on the line and to alert the exchange operator.
In 1877 and 1878, Edison invented and developed the carbon microphone used in all telephones along with the Bell receiver until the 1980s. After protracted patent litigation, a federal court ruled in 1892 that Edison and not Emile Berliner was the inventor of the carbon microphone. The carbon microphone was also used in radio broadcasting and public address work through the 1920s.
1896 Telephone (Sweden)
In the 1890s a new smaller style of telephone was introduced, the candlestick telephone, packaged in three parts. The transmitter stood on a stand, known as a "candlestick" for its shape, hence the name. When not in use, the receiver hung on a hook with a switch in it, known as a "switchhook." Previous telephones required the user to operate a separate switch to connect either the voice or the bell. With the new kind, the user was less likely to leave the phone "off the hook". In phones connected to magneto exchanges, the bell, induction coil, battery, and magneto were in a separate bell box called a "ringer box." In phones connected to common battery exchanges, the ringer box was installed under a desk, or other out of the way place, since it did not need a battery or magneto.
Cradle designs were also used at this time, having a handle with the receiver and transmitter attached, separate from the cradle base that housed the magneto crank and other parts. They were larger than the "candlestick" and more popular.
Disadvantages of single wire operation such as crosstalk and hum from nearby AC power wires had already led to the use of twisted pairs and, for long distance telephones, four-wire circuits. Users at the beginning of the 20th century did not place long distance calls from their own telephones but made an appointment to use a special sound proofed long distance telephone booth furnished with the latest technology.
Around 1893, the country leading the world in telephones per 100 persons (teledensity) was Sweden with 0.55 in the whole country but 4 in Stockholm (10,000 out of a total of 27,658 subscribers).[21] This compares with 0.4 in USA for that year.[22] Telephone service in Sweden developed through a variety of institutional forms: the International Bell Telephone Company (a U.S. multinational), town and village co-operatives, the General Telephone Company of Stockholm (a Swedish private company), and the Swedish Telegraph Department (part of the Swedish government). Since Stockholm consists of islands, telephone service offered relatively large advantages, but had to use submarine cables extensively. Competition between Bell Telephone and General Telephone, and later between General Telephone and the Swedish Telegraph Dept., was intense.
In 1893, the U.S. was considerably behind Sweden, New Zealand, Switzerland, and Norway in teledensity. The U.S. became the world leadership in teledensity with the rise of many independent telephone companies after the Bell patents expired in 1893 and 1894.
20th century developments[edit]
Old Receiver schematic, c.1906
A German rotary dial telephone, the W48
Top of cellular telephone tower
By 1904 over three million phones in the U.S.[23] were connected by manual switchboard exchanges. By 1914, the U.S. was the world leader in telephone density and had more than twice the teledensity of Sweden, New Zealand, Switzerland, and Norway. The relatively good performance of the U.S. occurred despite competing telephone networks not interconnecting.[24]
What turned out to be the most popular and longest lasting physical style of telephone was introduced in the early 20th century, including Bell's model 102 telephone. A carbon granule transmitter and electromagnetic receiver were united in a single molded plastic handle, which when not in use were placed in a cradle in the base unit. The circuit diagram[25] of the model 102 shows the direct connection of the receiver to the line, while the transmitter was induction coupled, with energy supplied by a local battery. The coupling transformer, battery, and ringer were in a separate enclosure from the desk set. The rotary dial in the base interrupted the line current by repeatedly but very briefly disconnecting the line 1 to 10 times for each digit, and the hook switch (in the center of the circuit diagram) permanently disconnected the line and the transmitter battery while the handset was on the cradle.
Starting in the 1930s, the base of the telephone also enclosed its bell and induction coil, obviating a separate ringer box. Power was supplied to each subscriber line by central office batteries instead of the user's local battery which required periodic service. For the next half century, the network behind the telephone grew progressively larger and much more efficient, and after the rotary dial was added the instrument itself changed little until Touch-Tone signaling started replacing the rotary dial in the 1960s.
The history of mobile phones can be traced back to two-way radios permanently installed in vehicles such as taxicabs, police cruisers, railroad trains, and the like. Later versions such as the so-called transportables or "bag phones" were equipped with a cigarette lighter plug so that they could also be carried, and thus could be used as either mobile two-way radios or as portable phones by being patched into the telephone network.
In December 1947, Bell Labs engineers Douglas H. Ring and W. Rae Young proposed hexagonal cell transmissions for mobile phones.[26] Philip T. Porter, also of Bell Labs, proposed that the cell towers be at the corners of the hexagons rather than the centers and have directional antennas that would transmit/receive in 3 directions (see picture at right) into 3 adjacent hexagon cells.[27][28] The technology did not exist then and the radio frequencies had not yet been allocated. Cellular technology was undeveloped until the 1960s, when Richard H. Frenkiel and Joel S. Engel of Bell Labs developed the electronics.
On 3 April 1973 Motorola manager Martin Cooper placed a cellular phone call (in front of reporters) to Dr. Joel S. Engel, head of research at AT&T's Bell Labs. This began the era of the handheld cellular mobile phone.
Meanwhile, the 1956 inauguration of the TAT-1 cable and later international direct dialing were important steps in putting together the various continental telephone networks into a global network.
Cable television companies began to use their fast-developing cable networks, with ducting under the streets of the United Kingdom, in the late 1980s, to provide telephony services in association with major telephone companies. One of the early cable operators in the UK, Cable London, connected its first cable telephone customer in about 1990.
Women's usage in the 20th century[edit]
Private conversation, 1910
The telephone was instrumental to modernization. It aided in the development of suburbs and the separation of homes and businesses, but also became a reason for the separation between women occupying the private sphere and men in the public sphere.[29] This would continue to isolate women and the home.
Women were regarded as the most frequent users of the telephone. It enabled women to work in the telecommunications sector as receptionists and operators. Their autonomy was celebrated as women were able to develop new relationships and nurture pre-existing ones in their private lives. Social relations are essential in the access and usage of telephone networks.
Both historically and currently, women are predominantly responsible for the phone calls that bridge the public and private sphere, such as calls regarding doctor’s appointments and meetings.[30] This emphasizes the telephone’s impact on the social lives of women in the domestic sphere, reducing both isolation and insecurity.
21st century developments[edit]
See also: IP telephony
This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. (February 2013) (Learn how and when to remove this template message)
Internet Protocol (IP) telephony, also known as Internet telephony or Voice over Internet Protocol (VoIP), is a disruptive technology that is rapidly gaining ground against traditional telephone network technologies. In Japan and South Korea up to 10% of subscribers switched to this type of telephone service as of January 2005.
IP telephony uses a broadband Internet service to transmit conversations as data packets. In addition to replacing the traditional plain old telephone service (POTS) systems, IP telephony also competes with mobile phone networks by offering free or lower cost service via WiFi hotspots. VoIP is also used on private wireless networks which may or may not have a connection to the outside telephone network.
See also[edit]
Bell Telephone Memorial, a major monument dedicated to the invention of the telephone
Canadian Parliamentary Motion on Alexander Graham Bell
Carbon microphone
Charles Bourseul - claimed inventor of the telephone
Elisha Gray
Elisha Gray and Alexander Bell telephone controversy
History of mobile phones
History of telecommunication
History of videotelephony
Innocenzo Manzetti
Invention of the telephone
Johann Philipp Reis - claimed inventor of the telephone
Antonio Meucci - claimed inventor of the telephone
Private branch exchange
Push-button telephone
Telephone exchange
The Telephone Cases, a series of court decisions in the U.S. on the telephone's invention
Thomas Edison's carbon telephone transmitter - greatly improved the telephone's sound quality
Timeline of the telephone
References[edit]
This article includes text from Withdrawal of National Historic Landmark Designation: Site of the First Telephone Exchange, New Haven, New Haven County, Connecticut, by the United States National Park Service, a work in the public domain.
^ Jump up to: a b c McVeigh, Daniel P. An Early History of the Telephone: 1664-1866: Robert Hooke's Acoustic Experiments and Silent Inventions Archived 24 May 2014 at the Wayback Machine., Columbia University website. Retrieved 15 January 2013. This work in turn cites:
Richard Waller and edited by R.T. Gunther. "The Postthumous Works of Robert Hooke, M.D., S.R.S. 1705." Reprinted in R.T. Gunther's "Early Science In Oxford", Vol. 6, p. 185, 25 "Archived copy". Archived from the original on 24 May 2014. Retrieved 20 May 2014. CS1 maint: Archived copy as title (link) CS1 maint: BOT: original-url status unknown (link)
^ Jump up to: a b Jacobs, Bill. Acoustic Telephones, TelefoonMuseum.com website. Retrieved 15 January 2013. This article in turn cites:
Kolger, Jon. "Mechanical or String Telephones", ATCA Newsletter, June 1986; and
"Lancaster, Pennsylvania Agricultural Almanac for the Year 1879: How to Construct a Farmer's Telephone", John Bater's Sons.; and
"Telephone Experiences of Harry J. Curl as told by him to E. T. Mahood, During the summer of 1933 at Kansas City, Missouri: First Telephone Experience."
Jump up ^ Grigonis, Richard. A Telephone in 1665?, TMCNet Technews website, 29 December 2008.
Jump up ^ Giles, Arthur (editor). County Directory of Scotland (for 1901-1904): Twelfth Issue: Telephone (Scottish Post Office Directories), Edinburgh: R. Grant & Son, 1902, p. 28.
Jump up ^ "Voicepipes and Speaking-Tubes". The Museum of Retro-Technology. 15 March 2010. Retrieved 17 October 2012.
Jump up ^ Jones, R. Victor Samuel Thomas von Sömmering's "Space Multiplexed" Electrochemical Telegraph (1808-10), Harvard University website. Attributed to "Semaphore to Satellite", International Telecommunication Union, Geneva 1965. Retrieved 2009-05-01
Jump up ^ Ronalds, B.F. (2016). Sir Francis Ronalds: Father of the Electric Telegraph. London: Imperial College Press. ISBN 978-1-78326-917-4.
Jump up ^ Lewis Coe (1995), "The Telephone and Its Several Inventors"
Jump up ^ "H.Res.269 - Expressing the sense of the House of Representatives to honor the life and achievements of 19th-century Italian-American inventor Antonio Meucci, and his work in the invention of the telephone. 107th Congress (2001-2002)". U.S. House of Representatives. Retrieved 7 February 2014.
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Jump up ^ Alvin K. Benson (2010). Inventors and inventions Great lives from history Volume 4 of Great Lives from History: Inventors & Inventions. Salem Press. p. 1298. ISBN 9781587655227.
Jump up ^ Puskás Tivadar (1844 - 1893) (short biography), Hungarian History website. Retrieved from Archive.org, February 2013.
Jump up ^ "Puskás Tivadar (1844 - 1893)". Mszh.hu. Archived from the original on 8 October 2010. Retrieved 2012-07-01.
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^ Jump up to: a b c d e f g Withdrawal of National Historic Landmark Designation: Site of the First Telephone Exchange, New Haven, New Haven County, Connecticut, United States National Park Service, United States Department of the Interior, 13 April 2006. Archived 15 August 2012 at the Wayback Machine.
Jump up ^ "History Of The Invention Of Telephone". The Reverse Phone. 9 June 2011. Retrieved 22 April 2012.
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Jump up ^ Bennett, Alfred Roslin (1895). Telephone Systems of the Continent of Europe. p. 337. Retrieved 14 June 2012.
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Jump up ^ "1947 memo by Douglas H. Ring proposing hexagonal cells" (PDF). Archived from the original (PDF) on 7 February 2012. Retrieved 30 August 2012.
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Further reading[edit]
Baker, Burton H. (2000), The Gray Matter: The Forgotten Story of the Telephone, Telepress, St. Joseph, MI, 2000. ISBN 0-615-11329-X
Bruce, Robert V. (1990), Alexander Graham Bell and the Conquest of Solitude, Cornell University Press, Ithaca, 1990.
Casson, Herbert N. (March 1910). "The Birth Of The Telephone: Its Invention Not An Accident But The Working Out Of A Scientific Theory". The World's Work: A History of Our Time. XIX: 12669–12683. Retrieved 2009-07-10.
Casson, Herbert N. (May 1910). "The Future Of The Telephone: The Dawn Of A New Era Of Expansion". The World's Work: A History of Our Time. XX: 12903–12918. Retrieved 2009-07-10.
Coe, Lewis (1995), The Telephone and Its Several Inventors: A History, McFarland, North Carolina, 1995. ISBN 0-7864-0138-9
Evenson, A. Edward (2000), The Telephone Patent Conspiracy of 1876: The Elisha Gray - Alexander Bell Controversy, McFarland, North Carolina, 2000. ISBN 0-7864-0883-9
Huurdeman, Anton A. (2003), The Worldwide History of Telecommunications, IEEE Press and J. Wiley & Sons, 2003. ISBN 0-471-20505-2
John, Richard R (2010), Network Nation: Inventing American Telecommunications, Harvard University Press, 2010; traces the evolution of the country's telegraph and telephone networks.
Josephson, Matthew (1992), Edison: A Biography, Wiley, 1992. ISBN 0-471-54806-5
Wheen, Andrew (2011), DOT-DASH TO DOT.COM: How Modern Telecommunications Evolved from the Telegraph to the Internet (Springer, 2011). ISBN 978-1-4419-6759-6
External links[edit]
Wikimedia Commons has media related to History of telephony.
Kempe, Harry Robert; Garcke, Emile (1911). "Telephone". Encyclopædia Britannica. 26 (11th ed.). pp. 547–557.
"Alexander Graham Bell (1847-1922)". Scottish Science Hall of Fame. National Library of Scotland. Retrieved 31 January 2014.
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Forbes' list of the world's highest-paid athletes
From Wikipedia, the free encyclopedia
Jump to: navigation, search
This is a list of the highest-paid athletes in the world as ranked by Forbes magazine.
Contents
[hide]
1 2017 list
2 2016 list
3 2015 list
4 2014 list
5 2013 list
6 2012 list
7 See also
8 References
9 External links
2017 list
The 2017 list:[1]
Rank
Name
Sport
Nation
Total
Salary/Winnings
Endorsements
1 Cristiano Ronaldo Football Portugal $93 million $58 million $35 million
2 LeBron James Basketball United States $86.2 million $31.2 million $55 million
3 Lionel Messi Football Argentina $80 million $53 million $27 million
4 Roger Federer Tennis Switzerland $64 million $6 million $58 million
5 Kevin Durant Basketball United States $60.6 million $26.6 million $34 million
6 Andrew Luck American football United States $50 million $47 million $3 million
6 Rory McIlroy Golf Northern Ireland $50 million $16 million $34 million
8 Stephen Curry Basketball United States $47.3 million $12.3 million $35 million
9 James Harden Basketball United States $46.6 million $26.6 million $20 million
10 Lewis Hamilton Auto racing England $46 million $38 million $8 million
2016 list
The 2016 list:[2]
Rank
Name
Sport
Nation
Total
Salary/Winnings
Endorsements
1 Cristiano Ronaldo Football Portugal $88 million $56 million $32 million
2 Lionel Messi Football Argentina $81.4 million $53.4 million $28 million
3 LeBron James Basketball United States $77.2 million $23.2 million $54 million
4 Roger Federer Tennis Switzerland $67.8 million $7.8 million $60 million
5 Kevin Durant Basketball United States $56.2 million $20.2 million $36 million
6 Novak Djokovic Tennis Serbia $55.8 million $21.8 million $34 million
7 Cam Newton American football United States $53.1 million $41.1 million $12 million
8 Phil Mickelson Golf United States $52.9 million $2.9 million $50 million
9 Jordan Spieth Golf United States $52.8 million $20.8 million $32 million
10 Kobe Bryant Basketball United States $50 million $25 million $25 million
2015 list
The 2015 list was released on 10 June 2015.[3]
Rank
Name
Sport
Nation
Total
Salary/Winnings
Endorsements
1 Floyd Mayweather Jr. Boxing United States $300 million $285 million $15 million
2 Manny Pacquiao Boxing Philippines $160 million $148 million $12 million
3 Cristiano Ronaldo Football Portugal $79.6 million $52.6 million $27 million
4 Lionel Messi Football Argentina $73.8 million $51.8 million $22 million
5 Roger Federer Tennis Switzerland $67 million $9 million $58 million
6 LeBron James Basketball United States $64.8 million $20.8 million $44 million
7 Kevin Durant Basketball United States $54.1 million $19.1 million $35 million
8 Phil Mickelson Golf United States $50.8 million $2.8 million $48 million
9 Tiger Woods Golf United States $50.6 million $0.6 million $50 million
10 Kobe Bryant Basketball United States $49.5 million $23.5 million $26 million
2014 list
The 2014 list was released on 11 June 2014.[4]
Rank
Name
Sport
Nation
Total
Salary/Winnings
Endorsements
1 Floyd Mayweather Jr. Boxing United States $105 million $105 million $0
2 Cristiano Ronaldo Football Portugal $80 million $52 million $28 million
3 LeBron James Basketball United States $72.3 million $19.3 million $53 million
4 Lionel Messi Football Argentina $64.7 million $41.7 million $23 million
5 Kobe Bryant Basketball United States $61.5 million $30.5 million $31 million
6 Tiger Woods Golf United States $61.2 million $6.2 million $55 million
7 Roger Federer Tennis Switzerland $56.2 million $4.2 million $52 million
8 Phil Mickelson Golf United States $53.2 million $5.2 million $48 million
9 Rafael Nadal Tennis Spain $44.5 million $14.5 million $30 million
10 Matt Ryan American football United States $43.8 million $42 million $1.8 million
2013 list
The 2013 list was released on 5 June 2013.[5]
Rank
Name
Sport
Nation
Total
Salary/Winnings
Endorsements
1 Tiger Woods Golf United States $78.1 million $13.1 million $65 million
2 Roger Federer Tennis Switzerland $71.5 million $6.5 million $65 million
3 Kobe Bryant Basketball United States $61.9 million $27.9 million $34 million
4 LeBron James Basketball United States $59.8 million $17.8 million $42 million
5 Drew Brees American football United States $51 million $40 million $11 million
6 Aaron Rodgers American football United States $49 million $43 million $6 million
7 Phil Mickelson Golf United States $48.7 million $4.7 million $44 million
8 David Beckham Football England $47.2 million $5.2 million $42 million
9 Cristiano Ronaldo Football Portugal $44 million $23 million $21 million
10 Lionel Messi Football Argentina $41.3 million $20.3 million $21 million
2012 list
The 2012 list was released on 18 June 2012.[6]
Rank
Name
Sport
Nationality
Total earnings
Salary/winnings
Endorsements
1 Floyd Mayweather Jr. Boxing United States $85 million $85 million $0
2 Manny Pacquiao Boxing Philippines $62 million $56 million $6 million
3 Tiger Woods Golf United States $59.4 million $4.4 million $55 million
4 LeBron James Basketball United States $53 million $13 million $40 million
5 Roger Federer Tennis Switzerland $52.7 million $7.7 million $45 million
6 Kobe Bryant Basketball United States $52.3 million $20.3 million $32 million
7 Phil Mickelson Golf United States $47.8 million $4.8 million $43 million
8 David Beckham Football England $46 million $9 million $37 million
9 Cristiano Ronaldo Football Portugal $42.5 million $20.5 million $22 million
10 Peyton Manning American football United States $42.4 million $32.4 million $10 million
See also
List of professional sports leagues by revenue
References
Jump up ^ "The World's Highest Paid Athletes 2017".
Jump up ^ "World's Highest Paid Athletes 2016". Forbes. Retrieved 30 January 2017.
Jump up ^ "Forbes Announces 2015 List Of The World's 100 Highest-Paid Athletes". Forbes. Retrieved 16 July 2016.
Jump up ^ "Floyd Mayweather Heads 2014 List Of The World's Highest-Paid Athletes". Forbes. Retrieved 16 July 2016.
Jump up ^ "The World's Highest-Paid Athletes 2013: Behind The Numbers". Forbes. Retrieved 16 July 2016.
Jump up ^ "Mayweather Tops List Of The World's 100 Highest-Paid Athletes". Forbes. Retrieved 16 July 2016.
External links
The World's Highest-Paid Athletes List - Forbes
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Hand luggage
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Hand luggage compartments of an Airbus A340-600 aircraft (economy class)
A tiny portable scale to check if hand luggage is within weight limits.
The term hand luggage or cabin baggage (also commonly referred to as carry-on in North America) refers to the type of luggage that passengers are allowed to carry along in the passenger compartment of a vehicle instead of moving to the cargo compartment. Passengers are allowed to carry a limited number of smaller bags with them in the vehicle and contain valuables and items needed during the journey. There is normally storage space provided for hand luggage, either under seating, or in overhead lockers. Trains usually have luggage racks above the seats and may also (especially in the case of trains travelling longer distances) have luggage space between the backs of seats facing opposite directions, or in extra luggage racks, for example, at the ends of the carriage near the doors.
Contents
[hide]
1 Commercial air travel
1.1 Cabin baggage allowances
1.2 Security restrictions
1.2.1 European Union
1.2.2 United States
2 See also
3 References
4 External links
Commercial air travel[edit]
Hand baggage allowance is a topic frequently discussed in context of commercial air travel. On one hand, passengers may want to have more of their possessions at hand during flight, skip often time-consuming baggage claim process, and avoid the risk of having their checked baggage lost or damaged. On the other hand, safety concerns, takeoff weight limitations and financial incentives cause airlines to impose limits on how much and what can a passenger take into the cabin of aircraft.
Cabin baggage allowances[edit]
Luggage gauge
The International Air Transport Association (IATA) sets guidelines for cabin baggage/hand luggage/carry-on luggage size.[1] They are not mandatory, however, and individual airlines can and do vary their requirements. The IATA guideline at one time stated:
Cabin baggage should have a maximum length of 56 cm (22 inches), width of 45 cm (18 inches) and depth of 25 cm (10 inches) including all handles, side pockets, wheels etc.
The actual size and weight limits of cabin baggage can differ widely, in some cases they are dependent on the aircraft model being used, in other cases it depends on the booking class. Due to the lack of standardization a large number of different specifications were created by the airlines on the maximum permitted cabin luggage restrictions (see below). In 2015 the IATA made an effort to introduce a common smaller size for cabin luggage by introducing the "IATA Cabin OK" logo. Major airlines have expressed their interest to accept luggage of that size on their flights. This is specified as 55 x 35 x 20 cm (or 21.5 x 13.5 x 7.5 inches).[2] There were news that the move was backed by nine airlines including Lufthansa, Emirates and Qatar Airlines.[3] The new size restrictions were criticised widely[4][5] with the introduction program to be put on hold a few days later.[6][7] Consequently none of the mentioned airlines has introduced the new format (by April 2016).
Dimensions
Airlines and notes
42 cm × 32 cm × 25 cm Wizz Air (or 56 × 45 × 25 for an extra fee)
45 cm × 35 cm × 20 cm Japan Airlines on aircraft with under 100 seats on domestic flights[8]
48 cm × 33 cm × 20 cm Aer Lingus Regional (Stobart Air – one bag max. 7 kg)[9]
48 cm × 36 cm × 20 cm Aurigny class Regional (one bag max. 10 kg) or class Inter-Island (max. 6 kg)[10]
50 cm × 45 cm × 20 cm Jet Airways for flights within India with ATR aircraft (one bag max. 7 kg for Economy Class, one bag max. 10 kg plus one laptop for Business and First Class)[11]
55 cm × 35 cm × 20 cm
"Cabin OK" IATA Proposed Cabin OK logo (2015)
55 cm × 35 cm × 25 cm Air France (weight allowance depends on route and class),[12] Jet Airways for all other flights (one bag max. 7 kg for Economy Class, one bag max. 10 kg plus one laptop for Business and First Class),[11] Malaysia Airlines; (one bag up to 7 kg plus one personal item)[13]
55 cm × 40 cm × 20 cm Asiana Airlines,[14] Korean Air,[15] Vueling,[16] Ukraine International Airlines,[17] Ryanair (not guaranteed to travel in cabin, first bag max. 10 kg;. Second bag of size 35 cm × 20 cm × 20 cm also allowed.)[18]
55 cm × 40 cm × 23 cm Austrian Airlines, Edelweiss Air, Lufthansa, Swiss Global Air Lines, Swiss International Air Lines (one bag max. 8 kg or a foldable garment bag up to 57 cm × 54 cm × 15 cm) also allowed in the cabin: another item of carry-on baggage (max. 30 x 40 x 10 cm, e.g. handbag, laptop bag);[19][20] Flybe (one bag max. 10 kg),[21] Air Canada (10 kg plus one personal item not exceeding 43 cm × 33 cm × 16 cm) [22]
55 cm × 40 cm × 24 cm Aer Lingus (one bag max. 10 kg plus one personal item not exceeding 33 cm × 25 cm × 20 cm)[9] (Flights operated by Stobart Air: one bag only 7 kg 48cm x 33cm x 20cm)
55 cm × 40 cm × 25 cm All Nippon Airways, Japan Airlines on aircraft with at least 100 seats on domestic flights,[23] for all aircraft on international flights
56 cm × 35 cm × 23 cm Delta Air Lines (one bag plus one personal item),[24] United Airlines (one bag plus one personal item)[25]
56 cm × 36 cm × 23 cm American Airlines (one bag plus one personal item),[26] Virgin Atlantic[27]
56 cm × 45 cm × 25 cm
"IATA size" British Airways (one bag plus one bag up to 40 cm x 30 cm x 15[28] cm, up to 23 kg each);[29] EasyJet (one bag, no special weight limit, not guaranteed to travel in cabin);[30] Finnair (one bag, max. 8 kg plus one personal item)[31]
Isometric projection of hand luggage allowance sizes in centimetres
+: an additional unspecified personal item is permitted
Dimensions are sometimes listed as "linear", meaning the height, width, and length are not to exceed a certain total number.[32]
Note: The 3 largest US-based Airlines (AA, DL, UA) indicate on their respective web sites that the maximum dimensions for carry-aboard luggage are 22 inches x 14 inches x 9 inches, including handles & wheels of the bag. Those 3 airlines differ ONLY in how they convert those inch-based dimensions to centimetres.
Business Class, First class passengers and holders of high level mileage club members are often allowed to carry on a second bag of the same size and weight, or a smaller size and weight.
On smaller sized aircraft, sometimes the hand baggage can be carried to the aircraft door, where it is collected by baggage handlers for stowing in the cargo area and returned to the passenger right after landing.
Security restrictions[edit]
Following the increase in restrictions imposed on flights from UK airports and to the USA after the events of August 2006 transatlantic aircraft plot, hand baggage on such flights was restricted to one cabin bag no bigger than 45 cm × 35 cm × 16 cm effective since 15 August.[33] On 21 September 2006, the British Airports Authority advised that from the following day, the allowable size of the single item of hand baggage on outgoing flights from the UK would be increased to 56 cm × 45 cm × 25 cm (approx. 22 in × 17.75 in × 9.85 in),[34] the IATA guideline size. Most UK airports remain to have a strict limit of one piece of cabin baggage per passenger, including business class (allowed two pieces of cabin baggage within Europe, excluding flights to and from the UK).
European Union[edit]
Vending machine for carry-on luggage plastic bags at Munich Airport
A common regulation for cabin baggage restrictions was introduced on 6 November 2006 in European Union and in Switzerland, Norway and Iceland.
Restrictions on liquids:
only liquids with max 100 ml per piece
all pieces assembled in a single zippable plastic bag of max 1000ml (1 liter)
the plastic resealable bag must not exceed 20 cm by 20 cm
maximum of 1 plastic bag per passenger
liquids include gels and lotions (shampoo, tooth paste), lip sticks, moist paper tissue, contact lens solution
Exceptions:
prescribed medicine of any size, non-prescribed medicine-only items
baby milk and other items for infants
nutrition for diabetes diet
Restrictions on dangerous objects:
weaponry, including imitations and sports utilities (e.g. archery)
sharp objects, even small ones, including dart arrows and razor blades
The recommendation allows for light knives and scissors with blades up to 6 cm but some countries do not accept these either (e.g. nail care items)
blunt objects, clubs and all larger sticks, including sports utilities (e.g. skateboard)
inflammable objects, including ethanol, alcoholic beverage above 70%, some match sticks
toxic chemicals, including pepper spray, liquid batteries, blood samples[35]
United States[edit]
The United States Transportation Security Administration (TSA) has introduced a series of restrictions effective since 26 September 2006 under the name "3:1:1" for liquids.[36]
Restrictions on liquids:
3.4 ounce or smaller of containers for liquids and gels (100 ml)
1 quart-size clear plastic zip-top bag holding the liquid contents (approx. 950 ml)
1 bag per traveler shown openly in the security bin
the TSA guidelines explicitly accept the metricized portions of 100 ml / 1 liter as defined later in the European Union
the list of exceptions for liquids (baby milk, diabetes diet) is identical to EU guidelines.
The TSA has additional restrictions for security searches: for example, the baggage should not be locked (except with a special luggage locks that TSA staff can open), gifts should not be wrapped, and shoes may be required to be taken off during body search with the metal detector. Food items in the luggage may be mistaken for dangerous material triggering an intensive search.
See also[edit]
Suitcase
Checked baggage
Baggage allowance
References[edit]
Jump up ^ "Baggage Services". Iata.org. Archived from the original on 2014-03-25. Retrieved 2012-10-06.
Jump up ^ "Airlines to Address Carry-On Bag Dilemma". International Air Transport Association. Retrieved 2015-07-29.
Jump up ^ "Lufthansa, Emirates and Qatar Airways set new bag size". Daily Mail. 11 June 2015.
Jump up ^ "'Cabin OK' is not OK: Our view". USA Today. 16 June 2015.
Jump up ^ "U.S. Senator Weighs in on IATA’s Carry-On Luggage Proposal". 14 June 2015.
Jump up ^ "IATA Pauses Rollout of Cabin OK to Reassess Initiative". IATA. 17 June 2015.
Jump up ^ "Standardized airline carry-on bag campaign halted". CBC News. 17 June 2015.
Jump up ^ "JAL Domestic Flights - Items that can be carried aboard". Retrieved 6 April 2016.
^ Jump up to: a b "Cabin Baggage - Aer Lingus". aerlingus.com. Retrieved 2014-08-25.
Jump up ^ "FAQ / luggage". Aurigny Airlines. Retrieved 2013-09-10.
^ Jump up to: a b "Baggage Allowance". JetAirways. Retrieved 2013-09-10.
Jump up ^ "Hand baggage". Air France. Retrieved 2013-09-10.
Jump up ^ "Plan - Baggage - Cabin Baggage". malaysiaairlines.com.
Jump up ^ "Carry-on Baggage". flyasiana.com. Retrieved 6 June 2015.
Jump up ^ "Baggage Services". koreanair.com. Retrieved 6 June 2015.
Jump up ^ "Checking in suitcases and hand luggage". vueling.com. Retrieved 24 June 2015.
Jump up ^ "Free Hand Luggage Allowance". Retrieved 17 January 2016.
Jump up ^ "General Terms & Conditions of Carriage". Ryanair.com. Retrieved 2015-06-06.
Jump up ^ "Lufthansa Carry-on baggage". Lufthansa. Retrieved 2013-09-10.
Jump up ^ "Baggage". Austrian Airlines. Retrieved 2013-09-10.
Jump up ^ Linked repaired 2012-01-19
Jump up ^ "Carry-On Baggage - aircanada".
Jump up ^ "JAL Domestic Flights - Items that can be carried aboard". Retrieved 6 April 2016.
Jump up ^ "Carry-on Baggage". Delta Air Lines. Retrieved 2013-09-10.
Jump up ^ http://www.united.com/CMS/en-US/travel/Pages/BaggageCarry-On.aspx
Jump up ^ "American Airlines Carry-on Baggage Allowance". aa.com.
Jump up ^ "Hand baggage". virgin-atlantic.com. Retrieved 2013-09-10.
Jump up ^ http://www.britishairways.com/en-gb/information/baggage-essentials/hand-baggage-allowances
Jump up ^ "Hand baggage allowances". British Airways. Retrieved 2014-08-25.
Jump up ^ "Terms and conditions". easyJet.com. Retrieved 2015-10-12.
Jump up ^ "Carry-on baggage". Finnair. Retrieved 2013-09-10.
Jump up ^ "Carry on Luggage Size Chart". The Luggage List. Retrieved 2015-03-15.
Jump up ^ "U.K. Expands Carry-On Bag Size, AllBusiness.com, 22 September 2006]
Jump up ^ "Hand luggage rules to be relaxed". BBC News. 2006-09-21. Retrieved 2010-05-04.
Jump up ^ "Hand Luggage Restrictions at UK airports".
Jump up ^ [1]
External links[edit]
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