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- Heliograph - Wikipedia
A heliograph (from Ancient Greek ἥλιος (hḗlios) 'sun' and γράφειν (gráphein) 'to write') is a solar telegraph [1] system that signals by flashes of sunlight (generally using Morse code from the 1840s) reflected by a mirror The flashes are produced by momentarily pivoting the mirror, or by interrupting the beam with a shutter [2]
- Heliographs: From Sun Signals to Early Telecommunications
In the vast realm of human communication, innovative methods have continually emerged to bridge distances and transmit messages across great expanses One such fascinating technique is the heliograph, a device that utilizes flashes of sunlight reflected by a mirror to convey coded communications
- Light Conversation: The Heliograph - HistoryNet
The heliograph, a mirrored instrument that could blink messages across great distances, was the latest in military communications technology, and this was the first time it had been used in a conflict
- Mirrors of War: The 158-Year History of the Heliograph
Heliograph mirrors communicated across 158 years from surveying tool to guerrilla warfare device
- HELIOGRAPH DESCRIPTION: The heliograph was a communications . . . - GVRHC
DESCRIPTION: The heliograph was a communications device used to transmit messages over long distances It uses a mirror attached to a surveying device to direct a beam of light to a receiving station Sunlight is used as the light source Messages could be sent in any direction during daylight hours
- Heliograph | signaling device | Britannica
It employed two adjustable mirrors so arranged that a beam of light from the sun could be reflected in any direction The beam was interrupted by a key-operated shutter that permitted the formation of the dots and dashes of the Morse code Where climatic…
- Heliographs. - Douglas Self
The Heliograph was a simple but highly effective instrument for instantaneous optical communication over 50 miles or more in the 19th century Its major uses were for military and survey work It was still in serious use at least up to 1935, for example by Glubb Pasha's Arab Legion in Palestine
- Kitten Vintage: The Heliograph– vintage solar communication
Before the telegraph there was the Heliograph, an instrument that reflected the sun's light to an observer at a distance In Greek, helios, means "sun", and graphein, meaning "write Its main uses were in the military (army and navy), survey and forest protection work
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