File:00159 Oscillatore del Righi.jpg
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Captions
Captions
Righi spark gap, invented by Augusto Righi in 1894
Summary
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| Description |
Italiano: Una base in legno presenta due montanti in ebanite collegati da una traversa superiore in legno. Nei montanti sono inseriti due elettrodi terminanti con due sfere d'ottone. Nello spazio compreso tra queste due sfere sono inserite altre due sfere dello stesso materiale, racchiuse in una struttura in ebanite imperniata nella traversa superiore in legno del telaio.
Questo oscillatore appartiene alla tipologia di oscillatori a quattro sfere con scarica in olio di vaselina inventato da Augusto Righi intorno al 1894. Collegato ad un rocchetto di induzione, questo strumento irradia onde elettromagnetiche. Fonte: https://commons.wikimedia.org/wiki/File:Oscillatore_di_Righi_a_quattro_sfere_-_Museo_scienza_tecnologia_Milano_D0030.jpg
English: Four ball Righi spark gap, invented by physicist Augusto Righi in 1894 for use in spark-gap radio transmitters. Righi was one of the first scientists to investigate microwaves, generating waves up to 12 GHz (2.5 cm wavelength) using resonator ball spark gaps like this. In use the outer balls were connected to the terminals of a induction coil which applied pulses of high voltage electricity, causing sparks to jump across the 3 spark gaps. The concept was that the outer balls were "charging" balls, which charged the two inner balls with opposite voltage, and the spark discharge between the inner "resonator" balls generated standing waves of current in the metal balls, which radiated the energy as microwaves. The two inner balls were often enclosed in a container of vaseline to allow the balls to be located closer together, to minimize the length of spark and thus the thermal energy lost during oscillation. Righi was the mentor of Guglielmo Marconi who designed the first practical radio communication systems. Marconi used Righi spark gaps like this in his first transmitters. |
| Date | |
| Source | Liceo Classico Annibal Caro di Fermo |
| Author | Liceo Classico Annibal Caro di Fermo |
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| current | 10:56, 11 February 2022 | | 5,184 × 3,456 (4.88 MB) | Giannoe (talk | contribs) | Uploaded a work by Liceo Classico Annibal Caro di Fermo from Liceo Classico Annibal Caro di Fermo with UploadWizard |
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