Robert von Lieben

<p>Robert von Lieben (September 5, 1878, in <a href="/facts/Vienna/NSpIURsA">Vienna</a> – February 20, 1913, in Vienna) was an Austrian entrepreneur, and self-taught physicist and inventor. Lieben and his associates Eugen Reisz and Siegmund Strauss invented and produced a gas-filled <a href="/facts/Triode/IGbT0RHa">triode</a> – the first <a href="/facts/Thermionic_valve/VHd1BNLq">thermionic valve</a> with a <a href="/facts/Control_grid/EW6hcLj6">control grid</a> that was designed specifically for <a href="/facts/Electronic_amplifier/pnRgxncC">amplification</a> rather than <a href="/facts/Demodulation/GFLGoxFl">demodulation</a> of signals, and is a distant ancestor of the <a href="/facts/Thyratron/tkhB15CK">thyratron</a>. After Lieben's death, the "Lieben valve", which is also known in English as the "Lieben-Reisz valve" and in German as the "LRS-Relais" (Lieben-Reisz-Strauss <a href="/facts/Relay/NQcb9usW">relay</a>), was used in the world's first <a href="/facts/Continuous_wave/XdKlBpgP">continuous wave</a> <a href="/facts/Radio_frequency/aWku7h4R">radio frequency</a> generator designed for <a href="/facts/Radiotelephone/MuDe82Uh">radio telephony</a>.
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Robert von Lieben open-in-new

Robert von Lieben