a Danish physicist and chemist who discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism. He is still known today for Oersted's Law. He shaped post-Kantian philosophy and advances in science throughout the late 19th century. In 1825, Ørsted made a significant contribution to chemistr...

a Danish physicist and chemist who discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism. He is still known today for Oersted's Law. He shaped post-Kantian philosophy and advances in science throughout the late 19th century. In 1825, Ørsted made a significant contribution to chemistry by producing aluminium for the first time. While an aluminium-iron alloy had previously been developed by British scientist and inventor Humphry Davy, Ørsted was the first to isolate the element via a reduction of aluminium chloride.

an American industrialist, founder of the Otis Elevator Company, and inventor of a safety device that prevents elevators from falling if the hoisting cable fails. He and his sons, who were also tinkerers, designed their own "safety elevator" and tested it successfully. He thought so little of it he neither patented it nor requested a bonus from his superiors...

an American industrialist, founder of the Otis Elevator Company, and inventor of a safety device that prevents elevators from falling if the hoisting cable fails. He and his sons, who were also tinkerers, designed their own "safety elevator" and tested it successfully. He thought so little of it he neither patented it nor requested a bonus from his superiors for it, nor did he try to sell it. In his spare time, he designed and experimented with his old designs of bread-baking ovens and train brakes, and patented a steam plow in 1857, a rotary oven in 1858, and, with Charles, the oscillating steam engine in 1860.

an American inventor of the steam shovel. Otis received a patent for his creation on February 24, 1839. At an early age, William was interested in earthworks and mechanics. At the age of 22, he had shown an uncommon mechanical ingenuity and created the first steam powered mechanical excavator. Using materials obtained in vicinity of Canton, Massachusetts, Wi...

an American inventor of the steam shovel. Otis received a patent for his creation on February 24, 1839. At an early age, William was interested in earthworks and mechanics. At the age of 22, he had shown an uncommon mechanical ingenuity and created the first steam powered mechanical excavator. Using materials obtained in vicinity of Canton, Massachusetts, William created the machine in 1835 which was used building railroad lines between Norwich and Worcester. Working with the company, ”Carmichael and Fairbanks”, William Smith Otis devised an apparatus carrying out the same actions as the person with a shovel.

an English mathematician and Anglican minister. After John Napier invented logarithms and Edmund Gunter created the logarithmic scales (lines, or rules) upon whic...

an English mathematician and Anglican minister. After John Napier invented logarithms and Edmund Gunter created the logarithmic scales (lines, or rules) upon which slide rules are based, it was Oughtred who first used two such scales sliding by one another to perform direct multiplication and division; and he is credited as the inventor of the slide rule in 1622. Oughtred also introduced the "×" symbol for multiplication as well as the abbreviations "sin" and "cos" for the sine and cosine functions.