Category:Telegraphy: Difference between revisions
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== Subcategories == | == Subcategories == | ||
*'''[[:Category:Electrical telegraphy|Electrical telegraphy]]''' | *'''[[:Category:Electrical telegraphy|Electrical telegraphy]]''' - the long-distance transmission of messages or information via electrical signals, usually over telecommunications lines or radio | ||
*'''[[:Category:Image telegraphy|Image telegraphy]]''' | *'''[[:Category:Image telegraphy|Image telegraphy]]''' - the use of telegraphic signals to send scanned images, such as in a fax machine | ||
*'''[[:Category:Morse telegraphs|Morse telegraphs]]''' | *'''[[:Category:Morse telegraphs|Morse telegraphs]]''' - the telegraphs created by Samuel Morse beginning in the 1830s, which were the first to allow electrical transmission of information over long distances | ||
*'''[[:Category:Optical telegraphy|Optical telegraphy]]''' | *'''[[:Category:Optical telegraphy|Optical telegraphy]]''' - a system of conveying information by visual signals, usually using towers with flags or shutters | ||
*'''[[:Category:Radio telegraphy|Radio telegraphy]]''' | *'''[[:Category:Radio telegraphy|Radio telegraphy]]''' - also known as wireless telegraphy, telegraphic signaling without wires connecting the end points of communication | ||
*'''[[:Category:Semaphore telegraphs|Semaphore telegraphs]]''' | *'''[[:Category:Semaphore telegraphs|Semaphore telegraphs]]''' - a kind of optical telegraphy in which information is communicated through towers with moving moving arms whose position expresses symbols, today can also refer to flag semaphore systems | ||
*'''[[:Category:Submarine telegraphy|Submarine telegraphy]]''' | *'''[[:Category:Submarine telegraphy|Submarine telegraphy]]''' | ||
*'''[[:Category:Telegraph applications|Telegraph applications]]''' | *'''[[:Category:Telegraph applications|Telegraph applications]]''' |
Revision as of 17:29, 26 September 2011
A system of telecommunication for the transmission of graphic symbols, usually letter of numerals, by the use of a signal code. Types include electrical, radio, and wireless.
For a history on the telegraph, see the Telegraph article.
Subcategories
- Electrical telegraphy - the long-distance transmission of messages or information via electrical signals, usually over telecommunications lines or radio
- Image telegraphy - the use of telegraphic signals to send scanned images, such as in a fax machine
- Morse telegraphs - the telegraphs created by Samuel Morse beginning in the 1830s, which were the first to allow electrical transmission of information over long distances
- Optical telegraphy - a system of conveying information by visual signals, usually using towers with flags or shutters
- Radio telegraphy - also known as wireless telegraphy, telegraphic signaling without wires connecting the end points of communication
- Semaphore telegraphs - a kind of optical telegraphy in which information is communicated through towers with moving moving arms whose position expresses symbols, today can also refer to flag semaphore systems
- Submarine telegraphy
- Telegraph applications
- Telegraph transmission speed
- Telegraph transmission technology
- Wireless telegraphy
Subcategories
This category has the following 11 subcategories, out of 11 total.
Pages in category "Telegraphy"
The following 110 pages are in this category, out of 110 total.
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C
E
F
G
H
K
M
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- Francesc Salvà i Campillo
- Pavel Schilling
- The Sea and Early Electrical Technology
- Georg Seibt
- Milestones:Shilling's Pioneering Contribution to Practical Telegraphy, 1828-1837
- Archives:Papers of E.W. Von Siemens
- Werner von Siemens
- Samuel Thomas von Sömmerring
- Spark Transmitter
- Stock Ticker
- Oral-History:Ellery W. Stone
- John Stone Stone
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- Telautograph
- Education:Telecommunication, the Civil War and War of 21st Century
- Archives:The Strategy of System-Building Telecommunications and the American South, 1885-1920
- Telefunken
- Telegraph
- Did the Telegraph Broaden Women's Sphere?
- Quadruplex Telegraph
- Milestones:Demonstration of Practical Telegraphy, 1838
- Long Distance Telegraphy
- Milestones:The Trans-Canada Microwave System, 1958
- William Thomson
- Milestones:County Kerry Transatlantic Cable Stations, 1866
- Transatlantic Cable
- Transcontinental Telegraph Line (U.S.)
- Milestones:Transcontinental Telegraph, 1861
- Transcontinental Telephone Service
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Media in category "Telegraphy"
The following 13 files are in this category, out of 13 total.
- Bell harmonic telegraph 0640.jpg 2,000 × 871; 167 KB
- Chicago Telegraph operating room 0633.jpg 5,746 × 2,902; 2.84 MB
- Fig05-SiemensKarolusFacsimileSystem1927 0622.jpg 1,731 × 2,170; 584 KB
- Hughes telegraph 0641.jpg 640 × 427; 32 KB
- Morse sounder 0497.jpg 570 × 480; 23 KB
- Morse telegraph register 0442.jpg 640 × 378; 32 KB
- Morse telegraph Register 0642.jpg 1,849 × 1,500; 276 KB
- Morse telegraph register 2 0444.jpg 640 × 428; 34 KB
- Telegraph Boy 0636.jpg 401 × 640; 31 KB
- Telegraph delivery man 0632.jpg 1,871 × 1,500; 470 KB
- Telegraph Equipment 0635.jpg 626 × 480; 51 KB
- Telegraph operating room 0634.jpg 640 × 407; 64 KB
- Telegraph Wires Cincinatti 0418.jpg 622 × 480; 62 KB