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DiaporamaOptical semaphore telegraph
1807
5.0 x 54.0 cm
Fundação Portuguesa das Comunicações
francisco antónio ciera (1763 – 1814)
Discover Francisco Ciera: Portuguese mathematician & astronomer famed for triangulation, optical telegraphs, & Picoto da Melriça. Explore his groundbreaking work in cartography & science.
Fundação Portuguesa das Comunicações (Lisbon, Portugal)
Explore Lisbon's Museu das Comunicações – a unique blend of telecommunications history and artistic expression spanning five centuries! Discover vintage tech, philately & Portugal’s communication heritage.
A model of a semaphore telegraph using paddles or shutters (miniature). The object has a wooden base painted to look like stone. On the base is a wooden structure painted black consisting of three rectangular sections, the middle one of which is higher than those at the sides. Each section comprises a “shutter” to which a rope is attached. The rope is used to move the shutter into different positions. This type of telegraph was developed by Francisco António Ciera for use in the telegraphic network of the Portuguese Royal Household. The system had a vocabulary of 60,000 words and phrases which, depending on the position of the shutters (vertical or horizontal), allowed diverse combinations of code to be transmitted.
About this artwork
- Title: Optical semaphore telegraph
- Artist: francisco antónio ciera
- Year: 1807
- Original dimensions: 5.0 x 54.0 cm
- Format: Portrait
- Copyright status: Public domain
- Where to see it: Fundação Portuguesa das Comunicações
- Color hue: Green Spectrum
- Perceived brightness: brilliant
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