Siemens: Ernst Werner von Siemens (1816-1892)
German engineer, entrepreneur, inventor of the electric motor, generator, tram and compass telegraph, improved submarine cables, proposed the flat-furnace method of steelmaking, revolutionized the process of steelmaking founder of Siemens. Founder of Siemens.
Born in Hanover to a peasant family, Siemens was the fourth of 14 children in his family. Because of his family's poverty, Siemens enlisted in the army after high school. During his service, Siemens became interested in telegraph technology and invented the compass telegraph, which became popular in the 19th century. Siemens was later sentenced to five years in prison for fighting a duel. While in prison, Siemens built a small electronics laboratory and conducted some electrical research.
In 1847, Siemens and the mechanical engineer Johann Georg Halske founded the Siemens-Halske Telegraph Manufacturing Company with an investment of 6,842 thalers (1 thaler is equal to 3 marks) from his cousin to produce the compass telegraph invented by Siemens, which was the forerunner of the later Siemens AG. In 1848 Siemens won the contract for the telegraph line from Frankfurt to Berlin, and from then on it began to develop greatly.
As an engineer, Siemens' love of technology had a direct impact on its development. At the time of its creation, Siemens was relying on the telegraph business, but also on the development and promotion of new technologies to support its main business development. In addition to managing the company, Siemens devoted more time to engineering research.
In 1866, Siemens came up with the working principle of the generator, and the first human generator was completed by a Siemens engineer. That same year, Siemens also invented the first direct-current motor. These technologies developed by Siemens were often immediately productized into the market or applied to new products. For example, the tram (1881), the trolleybus (1882), the elevator (1880), and the electric train (1879) were among the first to be brought to market by Siemens using the inventions of its founders. Ironically, the electric car, which didn't begin to gain traction until the late 20th century, was also first invented by Siemens in 1898.
Two, Gramme: Gramme (Gramme, Zénobe Théophile) Belgian-French inventor. born April 4, 1826 in Gers-Bordene, Belgium; died January 20, 1901 in Bois-Golombes, Hauts-de-Seine, France. Golombe, Hauts-de-Seine, France. Gramm was born in Belgium to a family of civil servants. He did not do well in school. To be fair, it should be said that he remained a big old man all his life. However, his hands were very dexterous and he was a master of electrical equipment. Gramm came to Paris in 1856 and has lived in the Paris area ever since. He got a job in a company specializing in the manufacture of electrical equipment. 1867, he made an improved alternator; in 1869, he came up with a direct current generator. Although Faraday and Henry had already established the feasibility of making generators in principle, the generators they made were only experimental devices. The real power generation equipment can be used for industrial production was realized in the hands of Gram. The electric power industry was built on the two generators of Gramm.