What did Edison invent? (all)

Edison invented and created many things, including electric lights, trams, movies, generators, motors, telephones, phonographs, timekeepers, voting counters, printing presses and acoustic analysis resonators? Synchronous transmitter, stencil mimeograph, etc.

First, the phonograph was born.

1877, Edison improved the early telephone invented by alexander bell and put it into practical use, and soon established a telephone company. Edison and Bell, two competing companies, had a fierce competition in London.

In the process of improving the telephone, he found that the diaphragm in the microphone vibrates with the sound. He found a needle, stood on the diaphragm, gently pressed the upper end with his hand, and then spoke to the diaphragm. The speed of sound can make the short needle vibrate in different ways. Edison drew a sketch for this and asked his assistant to make a machine. After many transformations, the first phonograph was born.

Second, electric lights.

Contrary to popular understanding, Edison was not the inventor of electric light at first, but Edison improved it. As early as 180 1 year, a British chemist named humphry davy used platinum wire to electrify and glow in the laboratory. 18 10, he invented the "electric candle" which was illuminated by the arc between two charged carbon rods, which was the earliest prototype of the electric lamp.

Joseph swan, another British electrical engineer, after nearly 30 years' research, made a vacuum bulb with electricity and light from carbon wire in 1878+02.

Three. Movable film camera

1889 Edison invented the movable film camera. This camera uses a pointed gear to drive the tape with the width of 19mm. Under the control of the ratchet, it drives the tape to move intermittently and punch holes at the same time. This camera is driven by a motor, and the shutter shaft is connected to the phonograph. When the camera is running, the phonograph records sound and can take pictures continuously. ?

4. Movable film projector

189 1 year, Edison invented the movable film projector, which is an early film projection equipment, and introduced the basic methods of film projection. The motor is used in front of the light source to make the film belt of continuous pictures rotate at high speed, thus creating the illusion of motion. The light source projects the pictures on the film onto the screen. ?

Verb (abbreviation for verb) sound film

19 10, Edison invented a movie camera consisting of a phonograph and a camera. Under the energy of the motor, the camera's shading crankshaft is linked with the phonograph, which can record when the camera is running. During the screening, the phonograph runs synchronously with the picture, so that sound and image appear at the same time.

Baidu Encyclopedia-Thomas Alva Edison