John Ambrose Fleming and the Beginning of Electronics
2004 was the centenary of John Ambrose Fleming's momentous patent on the thermionic diode that can be called the birth of electronics. The ''Edison effect'' was discovered in 1882; this was later shown to be the result of thermionic emission of electrons from a heated filament into a vacuum. Edison did not make any significant devices based on this discovery, and the effect was ignored for more than 8 years. In 1890 Fleming explained the effect and showed that the thermionic diode could be used as a rectifier. Fourteen years later Fleming filed his 1904 patent on the thermionic diode. It was the first public announcement of the electron tube; this revolutionized the development of radio and led to the invention of the thermionic triode by Lee de Forest in 1906. The background to these events will be described.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 837030
- Report Number(s):
- JLAB-ACT-04-10; DOE/ER/40150-3172; TRN: US200505%%4
- Resource Relation:
- Conference: AVS 51st International Symposium, Anaheim, CA (US), 11/2004; Other Information: PBD: 1 Nov 2004
- Country of Publication:
- United States
- Language:
- English
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