Signal lamp
Videos
A signal lamp is a visual signaling device for optical communication by flashes of a lamp, typically using Morse code. The idea of flashing dots and dashes from a lantern was first put into practice b
Signal lamp training during World War II
An Ottoman heliograph crew using a Blinkgerät (left)
Begbie signalling oil lamp, 1918
An air traffic controller using a handheld Aldis lamp to signal a plane to land.
Morse code
Videos
Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. It is named after Samuel
Signal lamp
…lamp (sometimes called an Aldis lamp or a Morse lamp) is a visual signaling device for optical communication by flashes of a lamp, typically using Morse code. The idea of flashing dots and dashes from a lantern was first put into practice by Captain Philip Howard Colomb, of the Royal Navy, in 1867. Colomb's…
This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur.
Single needle telegraph instrument
Telegraph key and sounder; the signal is "on" when the knob is pressed, and "off" when it is released, length and timing of the dits and dahs are entirely controlled by the telegraphist
Morse code receiver that records on paper tape