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1. Telegraph Key
- www.150.si.edu
- The telegraph key Samuel Morse used on his first line in 1844 was very simple--a strip of spring steel that could be pressed against a metal contact. ... It was used on the expanding telegraph system, perhaps as early as the fall of 1844 and certainly by 1845. ...
- Morse Telegraph Key, 1844-45, with improvements by Alfred Vail (1807-59) to the original invented by Samuel F. ...
2. Earle/Telegraph
- www.cmp.ucr.edu
- In the 19th century the telegraph and the railroad grew up together and formed both the transportation and the information superhighway. ...
- The railroad and the telegraph offer two conflicting signals in the 19th century. ... The telegraph and railroad represented a convergence of corporate interests creating effective monopolies. ...
- The telegraph and the railroad, in their engineering forms, were wires and rails paralleling each other across the landscape-two lines illusionistically converging in the distance, conjuring up a world that was vaguely accessible even if one never left home. ... The telegraph, railroad and photograph provided worlds within grasp but infinitely receding-rail and wire disappear over the horizon into a vanishing point. ...
- The same astute individual who explored the most democratic of media-photography-who devised a method to exchange information without regard to social station and across international lines-the telegraph-who espoused fine art as an elixir for the mind, was a racist. ... In a nation with a burgeoning population constantly on the move, the telegraph (later the telephone) and the snapshot camera allowed for an unprecedented level of inter-personal communications. ...
- It is easy to see Morse's affinity for photography as a tool for gathering visual information just as the telegraph was a tool for the transmission of written documents. The camera and telegraph were both about representation: the first provided an astonishing illusion of the optically depicted world, the second converted the common tongue into a privileged language, one composed of just two signals, the dot and the dash-metaphorically presaging the binary code of digital computing. ...
3. Signal Corps Civil War - Beardslee Telegraph Machine
- www.beardsleetelegraph.org
- Beardslee Telegraph Machine .
- Dave Harbin and Dave Bock have constructed six Beardslee telegraph machines from scratch. ...
- Donated replica Beardslee sets 3 & 4 by Dave Harbin (2nd Michigan Infantry Signal and Telegraph Detachment) and Dave Bock (OVCWA and 19th US Infantry) and PHOTOS of the Hilton Head original. ... pdf file from the Army Communicator history of the Flying Telegraph with some minor errors in the history in particular with regard to the last ten months of service. ...
- 3) You will also want to visit the discussion on the wire used by the Signal Telegraph system and later the USMT (post November 1863). ...
- 5) The video of the syncronization process for Beardslee Telegraph sets on line as done at Bardstown, Kentucky the second weekend of June, 2002 CAN BE FOUND HERE. ...
- 6) The mystery of the dial telegraph used by Myer in the Pennisula Campaign of 1862 has been what instrument did Rogers really use. ... The Chester Telegraph as noted in the forward of Plum's book (reprint by Ayer) by Paul J. ... Note the similarities between the Beardslee telegraph and the Chester telegraph. ...
- 7) The removal of the Beardslee telegraph from the Signal Corps as ordered by the Secretary of War in late November, 1863 was not without comment. Here are some of the comments supporting the Beardslee and the Signal Corps Field Telegraph. ...
- 12) The period of time of use for the Beardslee according to the USMT:"From about June, 1862, a field telegraph had been worked in the Army of the Potomac under the supervision of the Signal Corps, the wire used being of steel (six strands), covered with rubber, and the instrument the Beardslee magneto-electric machine. ... In March, 1864, by an order of the Secretary of War, these field telegraph lines and instruments were turned over to me to be worked. ...
- 13) So the dial telegraph was no longer used. ... See this OR from the United States Military Telegraph clearly establishing the use what is "most" likely the Beardslee around San Francisco harbor with undersea cables. One can assume that a larger gauge of wire allowed the dial telegraph to work well. ... It is also possible that this was the Chester Dial Telegraph set which was, according to Plum, in wide use even after the war. ...
4. MODERN PRACTICE OF THE ELECTRIC TELEGRAPH
- sd.znet.com
- MODERN PRACTICE OF THE ELECTRIC TELEGRAPH.
- If you ever wanted to know how to amalgamate the zincs of a Grove battery, or know how a bidirectional telegraph repeater works, or just to marvel that men with jars of acid and relays and iron wire on wood poles were able to communicate from Newfoundland to San Francisco and even across the Atlantic Ocean in what we now call ``real time'', you might be interested in this book. ...
- MODERN PRACTICE OF THE ELECTRIC TELEGRAPH.
- During the quarter of a century which has elapsed since the introduction of the Electric Telegraph in the United States, those engaged in its service have been almost entirely dependent upon verbal instruction, and long practical experience, for a thorough technical knowledge of their profession. ...
- The methods of testing telegraph lines and apparatus by actual measurement, which are now universally employed in Europe, and to some extent in this country, have been treated upon to an extent commensurate with the importance of the subject. ...
- The principles laid down for the guidance of the student in the formation of the telegraphic alphabet, and the subsequent progressive exercises intended for practice with the key, differ but slightly from those employed by the author, while teaching a class of students for the American Telegraph Company in 1864. ...
- Among the additional matter in the present edition will be found an entire new chapter upon the Recent Improvements in Telegraphic Practice, as well as a number of articles in the Appendix, on the Equipment of Telegraph Lines, the Working Capacity of Telegraph Lines, and the Electrical Tension of Batteries and Lines, etc. ...
- Much useful material has also been obtained from Sabine's Electric Telegraph, Culley's Hand-Book of the Electric Telegraph, Clark's Electrical Measurement, Varley's Report on the Condition of the Western Union Lines, and the columns of The Telegrapher. ...
- Technical Terms used in the Telegraph Service .
- TESTING TELEGRAPH LINES. ...
- Interruptions to which Telegraph Lines are Liable .
- Pope and Edison's Printing Telegraph .
- The Equipment of Telegraph Lines .
- The Working Capacity of Telegraph Lines .
- The Electrical Tension of Telegraph Batteries and Lines .
5. Atlantic Sentinel:Newfoundland's role in transatlantic cable communications
- www3.nf.sympatico.ca
- Newfoundland's role in transatlantic telegraph and telephone communications has been underdocumented. During the 1850s, the British colony played a leading role in bridging the Atlantic, as its geographic location made it the natural choice as the western terminus for transatlantic submarine telegraph cables. ... Gisborne established a company named Newfoundland Electric Telegraph, which became insolvent in late 1853, after constructing its telegraph line only from St. ... Subsequently, however, Gisborne met New York businessman Cyrus Field, who seized the grander notion of not only constructing a telegraph line across Newfoundland, but extending it even further - across the Atlantic Ocean, connecting Europe with North America. Field organized a number of companies to pursue this objective, including the New York, Newfoundland and London Telegraph Company, the Atlantic Telegraph Company, and Anglo-American Telegraph, all of which were involved with early transatlantic cables. In 1858, the world's first transatlantic telegraph cable was placed between Valentia, Ireland and Sunnyside, Trinity Bay; however, it lasted only three weeks. ... The book focuses on the critical role that Newfoundland played in transatlantic telegraph communications and chronicles the submarine cable landings in the province. ...
- THE ELECTRIC TELEGRAPH .
- WESTERN UNION TELEGRAPH COMPANY - BAY ROBERTS .
- FROM TELEGRAPH TO TELEPHONE CABLES .
- He was also the author of Telegraph and Telephone Companies in Newfoundland, a major article in the Encyclopedia of Newfoundland and Labrador, and Marconi's Miracle:the wireless bridging of the Atlantic, a book on Guglielmo Marconi's reception in 1901 of the first transatlantic wireless message on Signal Hill, St. ...
6. Telegraph
- www.sparkmuseum.com
- Early Telegraph Apparatus.
- Hughes Telegraph.
- The Hughes Telegraph.
- Many people are not aware that Morse didn’t invent the telegraph. What he did was invent a particular form of electromagnetic telegraph – one that was elegantly simple and required little maintenance. ... In the early days of the telegraph there were many other attempts to develop methods of communication by wire, and one of these, the Hughes Telegraph, was especially unusual. ...
- Breguet-Style Dial Telegraph.
- Demonstration Dial Telegraph Receiver.
- Dial Telegraph.
- Alphabet Dial Telegraph.
- Dial Telegraph.
- Ruhmkorf Alphabet Dial Telegraph.
- The telegraph is an early example of the Wheatstone apparatus and is made from silver, brass, mahogany and iron. ...
- Breguet Dial (ABC) Telegraph Transmitter.
- Breguet Dial (ABC) Telegraph Receiver.
- Breguet Dial (ABC) Telegraph.
7. HOW TO BUILD SIMPLE TELEGRAPH SETS - TELEGRAPH & SCI INSTRUMENT MUSEUMS
- www.chss.montclair.edu
- HOW TO BUILD SIMPLE TELEGRAPH SETS.
- W1TP TELEGRAPH & SCIENTIFIC INSTRUMENT MUSEUMS: http://w1tp. ...
- ( I am always looking to buy or trade telegraph keys ! ) .
- Click here to return to the main Telegraph Web Page. ...
- HOW TO BUILD SIMPLE TELEGRAPH SETS.
- I am often asked for help in building a working electric telegraph set for use in school projects or displays and demonstrations.
- I have tried to outline the process of building a simple set in the paragraphs below and I have included several variations as well as a simple wireless telegraph set.
- If you decide to build a telegraph set, I would particularly appreciate receiving photographs of your completed set and I will try to post some of them on this page for other "telegraph builders" to see. ...
- Before you start to build a telegraph set, I suggest that you read about the way that their design developed and about how a telegraph set works. This LINK describes the THEORY and CONSTRUCTION of the "electric telegraph". ...
- BUILDING A WORKING TELEGRAPH SYSTEM.
- Many people have inquired about how to build a simple telegraph system to approximate the early systems used in the 19th century. ...
- Many people just want to build a very simple set to become familiar with the basic principles of the electric telegraph.
- The following project is the simplest functional telegraph system construction project that I could find. ...
- Construction of the telegraph set is very simple. ...
- Here is an excellent Telegraph Science Project by 5th. ...
8. History of the Boston Fire Alarm Telegraph System
- www.insulators.com
- History of the Boston Fire Alarm Telegraph System.
- Soon after the invention of the telegraph by Samuel F. ... Pioneer fire alarm telegraph systems originated in the larger United States cities and had greatly spread in popularity in most other communities, especially in the East, by 1900. ...
- Channing of Boston and graduate of the University of Pennsylvania and Harvard University published an article in the Boston Daily Advertiser describing in general terms how a practical fire alarm telegraph system in the city of Boston could be constructed.
- This was to be the first fire alarm telegraph system of its type in the world.
- To establish communication between headquarters in the city, the central office and various district headquarters, so called dial telegraph instruments were introduced in 1874.
9. Adventures in CyberSound: The Story of the Telegraph
- www.acmi.net.au
- The Story of the Telegraph.
- In the year 1844, at the time the Morse system of electric telegraphy was introduced, and fourteen years later, when Europe and America were joined by telegraph cable, great civic honors were accorded the scientific pioneers who perfected these systems of long distance instantaneous communication. In the great speeches delivered by the gentlemen present at these memorable celebrations the main thread of thought -almost a prayer- running through the remarks of all speakers was that the telegraph would prove to be a harbinger of universal peace, friendship and civilization.
- That the hopes of those who were here to welcome the advent of the telegraph have not in full been realized, surely should not be charged to some unsuspected quality or property of the new art; but rather should we understand that a wide enough span has not not as yet intervened between the date of discovery and our own times for the art to work out its true destiny. As the investigator gropes back through the attenuated records of the past in search of the birth of the idea of the telegraph he is perplexed by the many attempts previously made to lay finger upon the genesis, the origin, of the telegraphic idea.
- Were it sensible to attribute to speculative fancy the beginning of any achievement or accomplishment which should ultimately have practical value, then we may say that John Baptista Porta, an Italian prodigy (1575) has claims which entitle him to recognition in telegraph history. ...
- In the year 1753, Charles Marshall, of Scotland, sent to The Scot's Magazine a communication which contained the earliest recorded reference to an electric telegraph, and as the telegraph was the fore-runner of all electrical activities, historians of electrical development in all civilized countries have in hundreds of instances made reference to the article which appeared in the February, 1753, issue of this magazine.
- The writer then goes on to explain his proposed method of operating the telegraph, whereby bits of paper bearing the letters of the alphabet are placed an eighth of an inch below suspended metallic balls at the receiving end and are attracted thereto as each wire is electrically charged from the distant station. ...
- Moigno writing in 1852, Sabine in 1867, and Taylor in 1879, all state that LeSage actually established his telegraph system at Geneva in the rear 1774. ... Then followed the telegraph experiments of Lomond, in France (1787), Claude Chappe, in France (1793), M. ...
- In chronological order the next noteworthy attempt made to devise a system of telegraphy was that of Harrison Gray Dyar, of New York, in the year 1828, An account of Dyar's experiments is interesting; first, because his ill-fated invention was the first telegraph tried in America, and, second, because his system was the last of the long line of impracticable telegraphs which were dependent upon frictional electric machines as sources of current. About the time Dyar was making his telegraph, Sturgeon, in England, and Joseph Henry, in America, were experimenting with electromagnets-those obedient and tractable little helpmates which were destined to provide us with a real telegraph system and to revolutionize mechanical motion. ...
- Dyar's telegraph was of the electrochemical order, being operated by sparks produced by a friction machine, the sparks being spaced and regulated by a pendulum. ...
- The primary cells introduced by John Frederick Daniell, in England (1836) and by William Grove, in England (1837) supplied the missing link and from that time onward practical telegraph systems were rapidly introduced and extended to meet social, governmental, and commercial requirements in all civilized countries.
- In England, in the year 1837, Edward Davy exhibited a telegraph system employing deflecting needles to indicate the received signals and in the same year Cooke and Wheatstone, in England procured an English patent (June 12) for a needle telegraph system employing six wires and five deflecting needles. ...
- Morse, invented the system of electric telegraphy universally known as the Morse Telegraph System. ...
10. EH.Net Encyclopedia: History of the U.S. Telegraph Industry
- www.eh.net
- Telegraph Industry.
- The electric telegraph was one of the first telecommunications technologies of the industrial age. ... By transmitting information quickly over long distances, the telegraph facilitated the growth in the railroads, consolidated financial and commodity markets, and reduced information costs within and between firms. This entry focuses on the industrial organization of the telegraph industry from its inception through its demise and the industry's impact on the American economy.
- The Development of the Telegraph.
- The telegraph was similar to many other inventions of the nineteenth century. ... This section is broken into four parts, each reviewing an era of telegraphy: precursors to the electric telegraph, early industrial organization of the industry, Western Union's dominance, and the decline of the industry.
- Precursors to the Electric Telegraph.
- Webster's definition of a telegraph is "an apparatus for communicating at a distance by coded signals. " The earliest telegraph systems consisted of smoke signals, drums, and mirrors used to reflect sunlight. ... The first extensive telegraph network was the visual telegraph. ... Chappe refined and expanded his network, and by 1799 his telegraph consisted of a network of towers with mechanical arms spread across France. ...
- Due to technological difficulties, the electric telegraph could not at first compete with the visual telegraph. The basic science of the electric telegraph is to send an electric current through a wire. ... Two elements had to be perfected before an electric telegraph could work: a means of sending the signal (generating and storing electricity) and receiving the signal (recording the breaks in the current).
- The science behind the telegraph dates back at least as far as Roger Bacon's (1220-1292) experiments in magnetism. ... A much longer list could be made, but the point is that no single person can be credited with developing the necessary technology of the telegraph.
11. KA2MGE TELEGRAPH MUSEUM
- www.netsync.net
- KA2MGE TELEGRAPH MUSEUM.
- A site for telegraph instrument collectors and others interested in the history of telegraphy. ...
- Telegraph Apparatus .
- Telegraph Company Advertising Signs .
12. THG-Overseas Telegraph Area Office
- www.thg.org.uk
- The Overseas Telegraph Service changed radically in 1964. ...
- Mid-1963 saw the opening of two new overseas telegraph area offices (OTAOs) in London and 6 in the provinces, and when the Overseas Tape Relay Unit (OTRU) became operational on 13th January 1964, it swung into action the first stage of the UK's overseas telegraph mechanisation plan. ...
- My first impression of a telegraph office was one of noise. ... I used 55's right upto the end of my telegraph days in 1982 and I still type on one today. ...
- We had direct telegraph circuits to London together with access to the inland TAS network and Gentex. Gentex was a European automatic telegraph switching network using Type A keyboard signalling. ...
- Fourthly to be 'tassed' to the nearest inland telegraph office for local hand-delivery. ...
- Telegraph Index.
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