When was the electric meter invented?

Analysis:

Edison was born in February 1847 in a working family in Milan, Ohio, USA. He only went to school for three months, and was later ordered to drop out of school because he was "stupid". His mother decided to teach her son to read and write by herself, and to teach him honesty, love the motherland and love mankind.

Edison's earliest interest was chemistry. He collected about 200 bottles and saved every penny to buy chemicals and put them in bottles. 186 1 American civil war broke out. Edison used the convenience of the train to run a tabloid to convey the war situation and news along the way. The tabloids are very popular, and he also gained talent, knowledge and experience from his intense work, and earned a lot of money to continue his chemical experiments. Unfortunately, when he was doing an experiment on the train, the train suddenly bumped, and a piece of phosphorus fell on the board, causing it to burn. The conductor came to put out the fire and gave him a heavy slap, which made his left ear deaf. He was kicked off the train when Edison was 16 years old.

Frustration did not discourage Edison. He fell in love with the telegraph again. After repeated research, he invented the automatic power recorder at 1868, which was his first invention. Later, he invented two new types of telegrams. 1877, he invented the carbon telephone transmitter to make the original telephone sound clearer. In addition, he invented the phonograph. People call him a magician.

1878 In September, Edison began to study electric lights when he was 3 1 year old. After thousands of failures, in April of 1879, he improved the rod-shaped and tubular lamps of his predecessors and made a glass ball. 1879 65438+1Oct. 2 1 He fixed a carbon-treated cotton thread in a glass bulb, pumped out air, sealed the mouth, applied current to make it glow, and a new lighting object appeared.

From 1880 to 1882, Edison designed light sockets, buttons, fuses, current breakers, electric meters, chandeliers, and also designed main line and branch line systems, which made the world's largest generator at that time, established the first power plant in new york and opened up the first civil lighting system. Later, he and george eastman invented the movie camera together. Edison's three great inventions: the phonograph, the electric light and power system and the movie camera enriched and improved the civilized life of mankind.

Edison died in 65438 at the age of 82. However, so far no one can break his record of holding 1093 invention patents, and people call him the king of invention.