Inventor, electrical engineer, mechanical engineer, physicist and futurist who designed the alternating current (ac) electricity supply system. He is called “The Father of the 20th Century. When Tesla arrived in America in 1884, he applied for his first patent for the Arc Lamp. The original patent was presented in 1885 and it, with many other genius concepts on ac currency were filed by Tesla with the United States Patent, along with all updated modifications over several years. Here is a hand drawn and signed diagram of his high voltage transformer H V Capacitor with coils. Incredibly special piece.