The Fleming valve proved to be the start of a technological revolution.

The first types of diodes were called Fleming valves.

Later known as the Fleming valve, it could be used as a rectifier of alternating current and as a radio wave detector.

The Fleming valve was the first practical application thermionic emission, discovered in 1873 by Frederick Guthrie.

Instead of a crystal detector, a Fleming valve (tube diode) could be used; it was a stable detector, but not very sensitive.

Unlike a crystal detector or Fleming valve detector, the audion provided amplification of the signal as well as detection.

It was also called a thermionic valve, vacuum diode, kenotron, thermionic tube, or Fleming valve.

There he invented the first attempts to avoid infringement of Lee De Forest's audion tube, by means of a Fleming valve with filament and plate.

On 25 October 1906, de Forest filed a patent for diode vacuum tube detector, a two-electrode device for detecting electromagnetic waves, a variant of the Fleming valve invented two years earlier.

Similarities and differences between the Fleming valve and DeForest's triode caused decades of expensive and disruptive litigation, which were not settled until 1943 when the United States Supreme Court ruled Fleming's patent invalid.

The Fleming valve, also called the Fleming oscillation valve, was a thermionic valve diode (called a "vacuum tube" in the USA) invented by John Ambrose Fleming and used in the earliest days of radio communication.

Originally invented as a radio receiver detector by adding a grid electrode to the Fleming valve, it found little use until its amplifying ability was discovered around 1912 by several researchers, who used it to build the first amplifying radio receivers and electronic oscillators.

This is so far the action of the Fleming valve which also makes use of the Edison effect, but in the audion an epoch making advance was made in that the third electrode allows us to completely control the strength of the electron current without consuming appreciable energy at that electrode or in its circuit.

The Fleming valve proved to be the start of a technological revolution.

The first types of diodes were called Fleming valves.

Later known as the Fleming valve, it could be used as a rectifier of alternating current and as a radio wave detector.

The Fleming valve was the first practical application thermionic emission, discovered in 1873 by Frederick Guthrie.

Instead of a crystal detector, a Fleming valve (tube diode) could be used; it was a stable detector, but not very sensitive.

Unlike a crystal detector or Fleming valve detector, the audion provided amplification of the signal as well as detection.

It was also called a thermionic valve, vacuum diode, kenotron, thermionic tube, or Fleming valve.

There he invented the first attempts to avoid infringement of Lee De Forest's audion tube, by means of a Fleming valve with filament and plate.

On 25 October 1906, de Forest filed a patent for diode vacuum tube detector, a two-electrode device for detecting electromagnetic waves, a variant of the Fleming valve invented two years earlier.

Similarities and differences between the Fleming valve and DeForest's triode caused decades of expensive and disruptive litigation, which were not settled until 1943 when the United States Supreme Court ruled Fleming's patent invalid.

The Fleming valve, also called the Fleming oscillation valve, was a thermionic valve diode (called a "vacuum tube" in the USA) invented by John Ambrose Fleming and used in the earliest days of radio communication.

Originally invented as a radio receiver detector by adding a grid electrode to the Fleming valve, it found little use until its amplifying ability was discovered around 1912 by several researchers, who used it to build the first amplifying radio receivers and electronic oscillators.

This is so far the action of the Fleming valve which also makes use of the Edison effect, but in the audion an epoch making advance was made in that the third electrode allows us to completely control the strength of the electron current without consuming appreciable energy at that electrode or in its circuit.