Voting recorder: He invented the voting recorder, which simplified the voting procedure and prevented voting fraud. His first invention succeeded.
Phonograph: The first invention that made him famous was the phonograph of 1877.
Film projector: Edison was inspired by a children's toy. If you connect the photos and move them quickly, it will form a continuous movement in his eyes. Edison also made a film projector from film.
Mimeograph: mimeograph is a method of printing with wax paper before the popularization of computer printing. Because of the simple tools and materials needed, it is very popular in schools and enterprises. The main tools are copying steel plate, copying pen, wax paper, ink and white paper.
Extended data:
In fact, Edison was just an innovator of electric light. There were electric lights decades before him, and even in terms of commercial popularization, he was not the first person. But Edison is still the king of invention. His contribution is not only great inventions such as electric light and phonograph, but more importantly, he reinvented the "invention" itself in a sense.
Incandescent lamps use the thermal effect of electric current, and some substances will glow when heated. As early as18th century, this phenomenon has been known by electricians. /kloc-At the beginning of the 9th century, before batteries and generators were developed, David, a British electrician, used 2000 capacitor bottles to discharge a thin platinum strip, demonstrating the most primitive incandescent lamp. In the next few decades, researchers have been trying to improve the design of incandescent lamps. They used carbon rods or platinum wires and iridium wires as conductors, and tried to put the filament in a vacuum container.
References:
Thomas Alva Edison (a famous American inventor and entrepreneur) _ Baidu Encyclopedia