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Sergey Zaryanko 19 - Public domain portrait painting


Sergey Zaryanko 19 - Public domain portrait painting



Портрет генерал-адъютанта Федора Петровича Литке 1854

Public domain photograph - military portrait, armed forces officer, leader, commander, 19th century, free to use, no copyright restrictions image - Picryl description

Sergey Zaryanko (1818–1870) was a Russian inventor, engineer, and scientist. He is best known for his contributions to the development of early electric lighting systems. Zaryanko constructed one of the earliest electric lamps in 1860, which he called the "electric candle." This device used a carbon filament enclosed in a vacuum tube and illuminated when an electric current passed through it. Zaryanko's work on electric lighting laid the groundwork for further advancements in the field, leading eventually to the development of practical incandescent light bulbs. However, his contributions were somewhat overshadowed by those of other inventors like Thomas Edison and Joseph Swan, who achieved greater commercial success with their own versions of the incandescent light bulb.





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fyodor petrovich litke
fyodor petrovich litke