Electric Circuit Controller

Tesla's electric circuit controllers, patented in 1898 like U.S. Patent 609,245, were electromagnetic relays for precise switching in motors, igniters, and remote systems. Using mercury-filled tubes or rotary mechanisms, they ensured reliable breaks and makes at high frequencies, minimizing arcing. Integral to his remote-controlled boat, they enabled logical operations akin to modern gates. Tesla's designs advanced automation, influencing computing precursors.

Historically, they supported his wireless tech, facing adoption hurdles. Today, they inspire solid-state relays in robotics and power systems. Tesla's controllers exemplify control engineering, foundational to electronics.