21 Facts About Optical telegraph

An optical telegraph is a line of stations, typically towers, for the purpose of conveying textual information by means of visual signals.

The line-of-sight distance between relay stations was limited by geography and weather, and prevented the optical telegraph from crossing wide expanses of water, unless a convenient island could be used for a relay station.

Optical telegraph composed it from the Greek elements s?µa ; and from f????, or f??a from fe?e?? .

However, the French Army preferred to call Chappe's semaphore system the Optical telegraph, meaning "far writer", which was coined by French statesman Andre Francois Miot de Melito.

Optical telegraph returned to his idea in 1795, after hearing of Chappe's system.

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Optical telegraph even considered using electricity, but could not find insulation for the conductors that would withstand the high-voltage electrostatic sources available at the time.

Napoleon Bonaparte made full use of the Optical telegraph by obtaining speedy information on enemy movements.

Invention of the Optical telegraph was followed by an enthusiasm concerning its potential to support direct democracy.

Something has been said about the Optical telegraph which appears perfectly right to me and gives the right measure of its importance.

The Optical telegraph had a sophisticated control panel which allowed the next symbol to be prepared while waiting for the previous symbol to be repeated on the next station down the line.

Akrell concluded that the shutter Optical telegraph was faster and easier to use, and was again adopted for fixed stations.

Optical telegraph employed rectangular framework towers with six five-foot-high octagonal shutters on horizontal axes that flipped between horizontal and vertical positions to signal.

Chains of Murray's shutter Optical telegraph stations were built along the following routes: London–Deal and Sheerness, London–Great Yarmouth, and London–Portsmouth and Plymouth.

The semaphore tower at Chatley Heath, which replaced the Netley Heath station of the shutter Optical telegraph, is currently being restored by the Landmark Trust as self-catering holiday accommodation.

In Ireland R L Edgeworth was to develop an optical telegraph based on a triangle pointer, measuring up to 16 feet in height.

The Tamar Valley semaphore Optical telegraph operated for twenty-two and a half years closing on 31 March 1858 after the introduction of the electric Optical telegraph.

The works were carried out over several years and the semaphore Optical telegraph was declared complete once more on Sunday 30 September 2001.

Optical telegraph wrote the code book "Taboas Telegraphicas", the same for the 3 telegraph types.

Once it had proved its success in France, the optical telegraph was imitated in many other countries, especially after it was used by Napoleon to coordinate his empire and army.

An optical telegraph system linking Philadelphia and the mouth of the Delaware Bay was in place by 1809 and had a similar purpose; a second line to New York City was operational by 1834, when its Philadelphia terminus was moved to the tower of the Merchants Exchange.

One of the principal hills in San Francisco, California is named "Telegraph Hill", after the semaphore Optical telegraph which was established there in 1849 to signal the arrival of ships into San Francisco Bay.