Since the first Morse telegraph systems were introduced, an enormous variety of Morse keys or telegraph keys and keyers have been constructed.
From Straight keys including the Camelback Morse key, to automatic Morse keyers such as the Vibroplex, their development has seen many new innovations, and enormous changes in style.
Even today many people enjoy sending Morse Code using these Morse keys. While some may say that they are simply a switch, this is most certainly not the case. Morse keys have been the subject of over 300 patents in the USA alone, and they have undergone a considerable amount of development. The way in which keys have developed since the very first ones used by Morse himself is a fascinating story. Some styles of key are quite familiar, whilst others have quite unusual attributes and as a result many people find collecting keys a fascinating pastime.
Watch this video about the history of the Morse key
There is also a text page on the Electronics+radio website