книги Наука, техника, медицина Техника ГОСТы, стандарты

Semaphore line

Код 3417444

  • ISBN: 978-5-5088-0271-4

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Аннотация к книге "Semaphore line"

High Quality Content by WIKIPEDIA articles! A semaphore telegraph, optical telegraph, shutter telegraph chain, Chappe telegraph, or Napoleonic semaphore is a system of conveying information by means of visual signals, using towers with pivoting shutters, also known as blades or paddles. Information is encoded by the position of the mechanical elements; it is read when the shutter is in a fixed position. These systems were popular in the late 18th to early 19th century. In modern usage, "semaphore line" and "optical telegraph" may refer to a relay system using flag semaphore, and "optical telegraph" may refer to a heliograph (optical telegraphy using mirror-directed sunlight reflections).

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ISBN: 978-5-5088-0271-4

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