De que é feito optical telegraph
Chappe’s semaphore line.
- Semaphore tower — tem como parte. A tower with movable sails.
- Semaphore signal arms — tem como parte. The positions of the arms encode characters.
- Telescope — tem como parte. Operators read the neighbouring tower through a telescope.
- Lens — utiliza. Signals were read through telescopes.
- Telescope — utiliza. Signals were read through a telescope.
- Lever — utiliza. The arms were moved by a system of levers and rods.
- Wood — é feito de. Chappe’s semaphore has wooden arms on a mast.