1906 Fessenden successfully transmitted
music with this equipment, and the same year Forest set
up commercial system radio telephony. British scientist, Ambrose
Fleming, used "Edison Effect" bulb the basis his
"valve" (or diode) which could detect high frequency waves used
in wireless telegraphy. believed that someday there would be
wireless communication, but thought (at the end the
nineteenth century) that would well the future.XIII-13
grounds suspect general ossification the innovative
structure West Orange. This work was
carried out with the cooperation GE's research lab who built
the oscillator. Fessenden had also developed an
oscillator transmit high-frequency waves.^3
The critical innovation was the work the
inventor-entrepreneur Lee Forest, who added third element
to the Edison-Fleming rectifier tube, and connected an
external supply electricity.
The use the "Edison Effect" bulb rectifier of
alternating current had followed the initial discovery 1883
and several tubes demonstrating this function had been
distributed scientists.
. His "audion" (or triode) could
be used not only detect radio waves, but also an
oscillator generate them. Edison
followed the development wireless technology but did not
become involved either the commercial technical side of
the innovation. Several inventors and scientists were
active this area, including Reginald Fessenden
