Born on July 9th:

Thomas DAVENPORT (1802 - 6.7.1851), an American blacksmith and inventor. In 1833, he designed the first rotary DC electric motor, created the train model he brought into motion. He is an owner of a patent for an electromagnetic machine (1837). In 1929, Walter Rice Davenport, the nephew of Thomas Davenport, published a book about his uncle, The Brandon Blacksmith, Inventor of the Electric Motor, based largely on Thomas' autobiography, written in 1849.

Svend FOYN (1809 – 30.11.1894), a Norwegian inventor, ship and whaling tycoon, who became famous after the invention of the harpoon gun. Also known not only as an inventor and entrepreneur, but also as one of the pioneers in improving the social conditions of workers in their enterprises. In 1857-1870, a large residential complex for his workers was built with his money, and the first kindergarten in the country was opened with his efforts.

Elias HOWE (1819 - 3.10.1867), an American mechanic and entrepreneur; one of the inventors of the sewing machine. It was Howe who won the patent for key technology. Howe's sewing machine could make straight seams at up to 300 stitches per minute; Scientific American calls this invention “extraordinary.” The film "Help!" about The Beatles band ends with the line “Respectfully dedicated to Elias Howe, who invented the sewing machine in 1846”.

Wilhelm Ludwig Franz HALLWACHS (1859 – 20.6.1922), a German experimental physicist. The main area of Hallwachs's scientific interests was the study of the photoelectric effect, electromagnetism, and optics. In 1888, he rediscovered the photoelectric effect, experimentally proving the loss of a negative charge by a metal when it was irradiated with short-wave ultraviolet radiation. He also discovered the phenomenon of photoelectric fatigue, created several electrical measuring instruments, including a quadrant-electrometer and a color refractometer.

Sir George Robert Freeman EDWARDS (1908 - 3.3.2003), an English aircraft engineer, designer and industrialist, one of the main developers of the Concord supersonic passenger aircraft. Edwards was awarded the Royal Medal in 1974 for his outstanding contribution to the applied sciences. He was also awarded the Guggenheim Medal (1959), awarded for significant achievements in the development of aeronautics (aeronautics and aviation).

Teodor Maksovich ORLOVICH (1909 – 6.6.1984), a Soviet economic leader, leader and organizer of cable production. During the Second World War, under the leadership of Teodor Orlovich, a cable of a special design for lying in water was developed, which was designed to ensure Soviet troops success in battles in the Tikhvin direction in the blocked Leningrad. Together with M.M. PETROV, he proposed (1947) a new construction of wires for the ignition system of aircraft engines capable of withstanding high voltage after a long stay in aggressive environments.

Nicolaas Govert de BRUIJN (1918 - 17.2.2012), a Dutch mathematician known for his research in graph theory, automatic proof, the author of a textbook on asymptotic methods of analysis. Constructions connected with the de Bruijn sequence are named after him: the de Bruijn cycle, the count de Bruijn, etc. He published in 1958 in the form of a book a course of lectures on asymptotic methods of analysis, twice reprinted and translated into Russian.

Benjamin Roy MOTTELSON (1926), an American and Danish physicist, the director of the Nordic Institute of Theoretical Atomic Physics (Nordit) in Copenhagen, One of the authors of a generalized model of the atomic nucleus. The Nobel laureate of 1975 “for the discovery of the connection between collective motion and particle motion in atomic nuclei and the development of the theory of the structure of the atomic nucleus based on this connection” (together with Niels Aage BOHR and James RAINWATER).





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