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Graca cable tram - A black and white photo of a trolley car
Heshikiri Hasebe - A black and white photo of an old typewriter
Keeni jaam - A black and white photo of a train station
Rachel Korn - A black and white photo of a woman
Rad u fabrici vagona - A black and white photo of a factory
Ciurlionis-Kymantaite - A black and white photo of a man and a woman
Фото в заголовке: Черно-белое старое фото журавлей Изображение с сайта Public domain images, http: / / www.public-domain-image.com / full-image / vintage-photography-public-domain-images-pictures / black-and-white-old-photo-of-oping-cranes.jpg
Chronstau Försterei - An old black and white photo of a barn
Лыково - A black and white photo of a helmet
Kinraide coil - A black and white photo of a machine
Резюме
A "Kinraide coil", a resonant transformer circuit that generates high voltage, low current, high frequency electricity invented by Thomas Burton Kinraide in 1898. It is similar to a Tesla coil but produces higher currents. Kinraide used it to power x-ray tubes in the early 20th century. It produced more penetrating x-rays than existing induction coil circuits, able to make images of the heavy trunk bones. Information from Kinraide coil, Electrotherapy Museum website
Nikola Tesla (1856–1943) Serbian American inventor and engineer who discovered and patented the rotating magnetic field, the basis of most alternating-current machinery. He also developed the three-phase system of electric power transmission. He immigrated to the United States in 1884 and sold the patent rights to his system of alternating-current dynamos, transformers, and motors to George Westinghouse.