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Group 1 fax machines are obsolete and no longer manufactured. Group 2 faxes conform to the ITU-T Recommendations T.3 and T.30. Group 2 faxes take three minutes to transmit a single page, with a vertical resolution of 96 scan lines per inch. Group 2 fax machines are almost obsolete, and are no longer manufactured.
Bain worked on an experimental fax machine from 1843 to 1846. He used a clock to synchronise the movement of two pendulums for line-by-line scanning of a message. For transmission, Bain applied metal pins arranged on a cylinder made of insulating material. An electric probe that transmitted on-off pulses then scanned the pins.
An early telautograph machine. The telautograph is an ancestor of the modern fax machine. It transmits electrical signals representing the position of a pen or tracer at the sending station to repeating mechanisms attached to a pen at the receiving station, thus reproducing at the receiving station a drawing, writing, or signature made by the sender.
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The earliest machine for sending pictures by telegraph is credited to Scottish inventor Alexander Bain in 1848. He patented an earlier unbuilt design in 1843. [28] Frederick C. Bakewell demonstrated another fax machine with an improved design at the Great Exhibition in 1851. [29] Bain also invented a chemical printing telegraph.
Alexander Bain (1810–1877), inventor and engineer, first to invent and patent the electric clock and fax machine; Charles Baird (1766–1843), engineer who played an important part in the industrial and business life of St. Petersburg; Francis Baird (1802–1864), engineer in St. Petersburg; son of Charles Baird
Scottish inventions and discoveries are objects, processes or techniques either partially or entirely invented, innovated, or discovered by a person born in or descended from Scotland. In some cases, an invention's Scottishness is determined by the fact that it came into existence in Scotland (e.g., animal cloning ), by non-Scots working in the ...
Scotland portal Wikimedia Commons has media related to Inventions from Scotland . Articles about things and processes invented, discovered, or developed, by persons of Scottish descent, or on Scottish soil.