Telegraph Key

A Telegraph Key is a device used in telegraphy to transmit messages over long distances using Morse code. It is a manual switch that is operated by pressing down on a lever or key, which completes an electrical circuit and sends a series of short and long signals, known as dots and dashes, respectively. These signals are then decoded by the receiving telegraph operator.

Telegraph keys were commonly used in the early days of telegraphy and played a crucial role in communication before the advent of telephones and modern communication systems. They were typically made of metal and had a lever or key that could be pressed down to send signals.

In the supply class Telephone And Telegraph Equipment, telegraph keys are categorized as part of the communication equipment used for telegraphy. They are essential tools for telegraph operators and enthusiasts who still practice Morse code communication.