Semi-Automatic Telegraph Keys - "Bugs"
Semi-automatic keys, often called "bugs", generate the "dits" of the Morse Code automatically by using a pendulum and spring mechanism connected to the left hand lever. The "dahs" are generated manually by the operator using the right hand lever. This innovation, that automatically generated the "dits," reduced arm and wrist fatigue for telegraph operators and increased sending speed and legibility.
Vibropolex Semi-Automatic Telegraph Keys - "Bugs"
The Vibroplex Company has been manufacturing semi-automatic, mechanical telegraph keys for over 100 years. Their founder, Horace G. Martin, invented this type of key sometime around 1902. Vibroplex is still in business today.
RSGB Vibroplex Centenary Key
To celebrate the Radio Society of Great Britain's's 100th Anniversary, this Centenary Key was limited to 250 individually numbered keys. It has a polished chrome mechanism with blue paddles, mounted on a heavy, special gold finish, base. This is complemented by a blue & gold plaque that has the Centenary logo, the production number and the owner’s callsign. [137]
To celebrate the Radio Society of Great Britain's's 100th Anniversary, this Centenary Key was limited to 250 individually numbered keys. It has a polished chrome mechanism with blue paddles, mounted on a heavy, special gold finish, base. This is complemented by a blue & gold plaque that has the Centenary logo, the production number and the owner’s callsign. [137]
Telegraph Apparatus Company Model CP810 Bug
This semi-automatic telegraph key was manufactured by McElroy subsidiary company, Telegraph Apparatus Company in either 1944 or 1945. It has no date or serial number. It is known as the "Hole in the Wall" key, probably because of the two holes drilled in the base. It is a very long bug at just over 4 inches. The chrome plating is thin and prone to wearing off. [144]
This semi-automatic telegraph key was manufactured by McElroy subsidiary company, Telegraph Apparatus Company in either 1944 or 1945. It has no date or serial number. It is known as the "Hole in the Wall" key, probably because of the two holes drilled in the base. It is a very long bug at just over 4 inches. The chrome plating is thin and prone to wearing off. [144]