They were called thermionic valves. there was also the cathode ray tube (CRT)
The Colossus computer worked using one to two thousand thermionic valves.
Shakir Mohamad Ali has written: 'Frequency multiplication and harmonic generation in thermionic valves'
A variety of methods were employed, from electromechanical telephone relays (Zuse KG Z3) to thermionic valves (ABC, Colossus, etc).
A variety of methods were employed, from electromechanical telephone relays (Zuse KG Z3) to thermionic valves (ABC, Colossus, etc).
The design, manufacture and repair of electronic devices. Electronics, is any electrical device that involves the use of control of electron flow, using thermionic valves or semiconductors.
Mechanical valves are effective but can increase the incidence of blood clots.
Colossus worked by holes punched in a paper tape. It was programmed by switches and plugs. Colossus used thermionic valves (vacuum tubes) to perform Boolean and counting operations.
To many people dying and changing valves for something else
To many people dying and changing valves for something else
A thermionic thermometer is a device that measures temperature by detecting the electrons emitted from a heated surface. It relies on the thermionic emission phenomenon, where electrons are released from a heated cathode and collected at an anode to generate a measurable signal related to the temperature of the cathode.
J.A.Fleming