- Pneumatic tube
Pneumatic tubes (or capsule pipelines; Lamson tubes) are systems in which cylindrical containers are propelled through a network of tubes by compressed air or by
vacuum . They are used for transporting physical objects, solid objects, compared to the more generic pipelines which transport gases or fluids.Pneumatic tube networks gained great prominence in the late 19th and early 20th century for businesses or administrations that needed to transport small but urgent packages (such as mail or money) over relatively short distances (within a building, or, at most, within a city). Some of these systems grew to great complexity, but they were eventually superseded by more modern methods of communication and courier transport, and are now much rarer than before.
A small number of pneumatic transportation systems were also built for larger cargo, to compete with more standard train and subway systems. However, these never really took off as practical systems.
History
Pneumatics can be traced back toHero of Alexandria in the 1st century AD, though there was apparently no thought of using them to move objects through pipes.Pneumatic capsule transportation was originally invented by
Phineas Balk in 1806.Fact|date=October 2008 Though a marvel of the time, and a successful sideshow, it was considered little more than a novelty until the invention of the capsule in 1836.Fact|date=October 2008 The Victorians were the first to use "capsule pipelines" to transmit telegraph messages, ortelegram s, to nearby buildings from telegraph stations.While they are commonly used for small parcels and documents — now most often used at
bank s orsupermarket s [cite book|author=Buxton, Andrew|title=Cash Carriers in Shops|location=Princes Risborough|publisher=Shire Publications|date=2004|isbn=978-07478-0615-8] — they were originally proposed in the early1800s for transport of heavy freight. It was once envisioned that networks of these massive tubes might be used to transport people.For postal service
Pneumatic post or pneumatic mail is a system to deliver letters through pressurized air tubes. It was invented by the Scottish engineer
William Murdoch in the 1800s and was later developed by theLondon Pneumatic Dispatch Company . Pneumatic post systems were used in several large cities starting in the second half of the 19th century, but were largely abandoned during the 20th century.It was also speculated that a system of tubes might deliver mail to every home in the US. A major network of tubes in
Paris was in use until 1984, when it was finally abandoned in favor of computers and fax machines. InPrague ,Czech Republic , a network of approximately 60 kilometers for delivering mail and parcels still exists. However, due to damage sustained during the2002 European floods the service has been put on indefinite hold.Typical current applications are in
bank s andhospital s. Many large retailers use pneumatic tubes to transport cheques or other documents from cashiers to the accounting office. One system lists a speed of 10 meters per second. [http://www.capsu.org/history/telegram_conveyors.html]Pneumatic post stations usually connected post offices, stock exchanges, banks and ministries. Italy was the only country to issue
postage stamp s (between 1913 and 1966) specifically for pneumatic post. Austria, France, and Germany issuedpostal stationery for pneumatic use.Historical use
* 1853: linking the London Stock Exchange to the city's main telegraph station (a distance of 220 yards)
* 1865: in Berlin (until 1976), the "Rohrpost", a system 400 kilometers in total length at its peak in 1940
* 1866: in Paris (until 1984, 467 kilometers in total length from 1934)
* 1875: in Vienna (until 1956)
* 1887: in Prague (until 2002 due to flooding), thePrague pneumatic post , [http://mobil.idnes.cz/mob_prakticky.asp?r=mob_prakticky&c=A040517_5258397_mob_prakticky]
* 1897: in New York City (until 1953)
* other cities: Munich, Rio de Janeiro, Hamburg, Rome, Naples, Milan, Marseilles, Melbourne, Boston, New York City, Philadelphia, Chicago, St. LouisFor transportation
(Pneumatic Transportation here in general refers to the transporting of people "inside" pneumatic tubes.)
In 1812,
George Medhurst first proposed, but never implemented, blowing passenger carriages through a tunnel.Atmospheric railway s, on which the tube was laid between the rails, with a piston running in it suspended from the train through a sealable slot in the top of the tube, were operated as follows: [cite book|last=Hadfield|first=Charles|title=Atmospheric Railways|date=1967|publisher=David & Charles|location=Newton Abbot|isbn=0-7153-4107-3]
* 1844-54:Dublin and Kingstown Railway 'sDalkey Atmospheric Railway between Kingstown (Dún Laoghaire ) andDalkey ,Ireland (mi to km|1.75|abbr=yes)
* 1846-47:London and Croydon Railway betweenCroydon andNew Cross ,London ,England (mi to km|7.5|abbr=yes)
* 1847-48:Isambard Kingdom Brunel 's South Devon Railway betweenExeter andNewton Abbot ,England (mi to km|20|abbr=yes)
* 1847-60:Paris –Saint-Germain railway between Bois de Vésinet andSaint-Germain-en-Laye ,France (km to mi|2|abbr=yes)In 1861, the Pneumatic Despatch Company built a system large enough to move a person, although it was intended for parcels. The
October 10 ,1865 inauguration of the newHolborn Station was marked by having theDuke of Buckingham , the chairman, and some of the directors of the company blown through the tube to Euston (a five minute trip).The 550-meter
Crystal Palace pneumatic railway was exhibited atthe Crystal Palace in 1864. This was a prototype for a proposed Whitehall Pneumatic Railway that would have run under theRiver Thames linking Waterloo andCharing Cross . Digging commenced in 1865 but was halted in 1868 due to financial problems.In 1867 at the
American Institute exhibition inNew York , Alfred Ely Beach demonstrated a 32.6 m long, 1.8 m diameter pipe that was capable of moving 12 passengers plus a conductor. In 1869, the Beach Pneumatic Transit Company of New York constructed in secret a 95 m long, 2.7 m diameter pneumatic subway line under Broadway. The line only operated for a few months, closing after Beach was unsuccessful in getting permission to extend it.In the 1960s, Lockheed and MIT with the
United States Department of Commerce conducted feasibility studies on avactrain system powered by ambient atmospheric pressure and "gravitational pendulum assist" to connect cities on the East Coast of the US. They calculated that the run between Philadelphia andNew York City would average 174 meters per second, that is 626 km/h (388 mph).When those plans were abandoned as too expensive, Lockheed engineer
L.K. Edwards foundedTube Transit, Inc. to develop technology based on "gravity-vacuum transportation". In 1967 he proposed a Bay Area Gravity-Vacuum Transit forCalifornia that would run alongside the then-under construction BART system. It was never built.Current usage
The technology is still used on a smaller scale. In North America, a large number of drive-up banks use pneumatic tubes to transport cash and documents between cars and tellers. Most hospitals have a computer-controlled pneumatic tube system to deliver drugs, documents and specimens to and from laboratories and nurses' stations. Many factories use them to deliver parts quickly across large campuses. Many larger stores use systems to securely transport excess cash from checkout stands to back offices, and to send change back to cashiers. NASA's original
Mission Control Center in Houston, Texas had pneumatic tubes connecting controller consoles with staff support rooms.Denver International Airport is noteworthy for the large number of pneumatic tube systems, including a 25 cm diameter system for moving aircraft parts to remote concourses, a 10 cm system forUnited Airlines ticketing, and a robust system in the parking toll collection system with an outlet at every booth.In fiction
When pneumatic tubes first came into use in the 19th century, they symbolized technological progress and it was imagined that they would be common in the future.
Jules Verne 's "Paris in the 20th Century " (1863) includes suspended pneumatic tube trains that stretch across the oceans.Albert Robida 's "The Twentieth Century " (1882) describes a 1950s Paris where tube trains have replaced railways, pneumatic mail is ubiquitous, and catering companies compete to deliver meals on tap to people's homes through pneumatic tubes.Edward Bellamy 's "Looking Backward " (1888) envisions the world of 2000 as interlinked with tubes for delivering goods.Michel Verne 's "An Express of the Future " (1888) questions the sensibility of atransatlantic pneumatic subway. In Michel & Jules Verne's "The Day of an American Journalist in 2889 " (1889) submarine tubes carry people faster than "aero-trains" and the "Society for Supplying Food to the Home" allows subscribers to receive meals pneumatically.Later, because of their use by governments and large businesses, tubes began to symbolize bureaucracy. In
George Orwell 's "Nineteen Eighty-Four ", pneumatic tubes in the Ministry of Truth deliver newspapers to Winston's desk containing articles to be "rectified". The movie "Brazil", which has similar themes, also used tubes (as well as other by 1985 anachronistic-seeming technologies) to evoke the stagnation of bureaucracy. At the start of each episode of the 1999 television series "Fantasy Island ", a darker version of the original, bookings for would-be visitors to the Island were sent to the devilish Mr. Roarke via a pneumatic tube from a dusty old travel agency, making the tube seem not so much bureaucratic as sinister.The failure of pneumatic tubes to live up to their potential as envisioned in previous centuries has placed them in the company of flying cars and dirigibles as ripe for ironic
retro-futurism . The 1960s cartoon series "The Jetsons " featured pneumatic tubes that people could step into and be sucked up and swiftly spit out at their destination. In the animatedtelevision series "Futurama ", set in the 31st century, large pneumatic tubes are used in cities for transporting people, whilst smaller ones are used to transport mail. The tubes in "Futurama " are also used to depict the endless confusion of bureaucracy: an immense network of pneumatic tubes connects all offices in New New York City to the "Central Bureaucracy", with all the capsules being deposited directly into a huge pile in the main filing room, with no sorting or organisation.See also
*
Pipeline transport
*Prague pneumatic post , the world's last preserved pneumatic mail system
*Swissmetro
*Vactrain
*Phineas Balk References
External links
* [http://www.cix.co.uk/~mhayhurst/jdhayhurst/pneumatic/book1.html Describes Paris pneumatic post, also mentions others]
* [http://www.dself.dsl.pipex.com/MUSEUM/COMMS/pneumess/pneumess.htm Site describing pneumatic post systems in England, France, Berlin, the US, and Prague, with photos]
* [http://www.capsu.org/features/pneumatic_tube_system_in_prague.html Article describing the pneumatic post system in Prague]
* [http://www.postalmuseum.si.edu/museum/1d_Pneumatic_Mail.html Pneumatic mail article] from the U.S.National Postal Museum
* [http://www.deadmedia.org/notes/index-cat.html#pn Pneumatic post articles] from theDead Media Project
* [http://www.hti.umich.edu/cgi/t/text/text-idx?c=moa;idno=AJR9164.0001.001 "The pneumatic dispatch..."] (1868) by Alfred Beach (scanned pages)
* [http://www.columbia.edu/~brennan/beach/ "Beach Pneumatic" Alfred Beach's Pneumatic Subway and the beginnings of rapid transit in New York]
* [http://www.lib.berkeley.edu/news_events/exhibits/futuristics/pt/ Futuristics: Pneumatic Transportation] (contains historical illustrations)
* [http://eserver.org/fiction/bellamy/10.html "Looking Backwards" Chapter X] by Edward Bellamy
* [http://www.julesverne.ca/vernebooks/jvexpress.html "An Express of the Future"] by Michel Verne
* [http://www.eastoftheweb.com/short-stories/UBooks/DayAmer.shtml "The Day of an American Journalist in 2889"] by Michel & Jules Verne
* [http://www.capsu.org/ Capsule Pipelines] Includes extensive historical documentation
*http://zapatopi.net/inteli-tube/ Proposal for pneumatic tubes for transporting people
*http://www.history.rochester.edu/steam/hero/ Pneumatics of the Hero of Alexandria
* [http://www.buispost.eu/e BUISPOST.EU] Website with lots of photos of (old) pneumatic tube parts
* [http://query.nytimes.com/gst/abstract.html?res=9406E0DA103CE433A25751C0A96E9C94699ED7CF New York Times 1898] Pneumatic mail between Manhattan and Brooklyn
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