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THE ELECTRIC BATTERY
Alessandro VOLTA - (1745/1827)
Italian Chemist and physicist.
1) Inventor of the electric battery.
2) He discovered how to produce electricity with a battery. He used dissimilar metals (zinc and copper) and brine for the electrolyte. In honour of his work, Volta was made a count by Bonaparte. Todays everybody uses electric batteries. -
THE STEAMBOAT
Robert Fulton - (1765/1815)
American Engineer and inventor.
1) He was the first to develop a commercially successful steamboat.
2) By early August 1807 a 150-foot- (45 meters) long Steamboat was ready. It consumed oak and pine fuel, which produced steam at a pressure of two to three pounds per square inch. The 150-mile (240-km) trial run from New York to Albany required 32 hours, considerably better time than the four miles per hour required by the monopoly. -
THE PHOTOGRAPHY
Nicéphore Nice - (1765/1833)
French Engineer
1) First to make a permanent photographic image.
2) He sought a way to provide images automatically. He coated pewter with various light-sensitive substances in an effort to copy superimposed engravings in sunlight. He recorded a view from his workroom window on paper sensitized with silver chloride but was only partially able to fix the image. He succeeded in 1822 in obtaining a photographic copy of an engraving superimposed on glass. -
THE TELEGRAPH
Samuel Morse (1791-1872)
American painter an inventor.
1) The invention of the telegraph revolutionized long-distance communication.
2) He worked by transmitting electrical signals over a wire laid between stations. In addition to he developed a code (bearing his name) that assigned a set of dots and dashes to each letter of the English alphabet and allowed for the simple transmission of complex messages across telegraph lines. In 1844, Morse sent his first telegraph message. -
THE ELEVATOR
Elisha OTIS - (1811/1861)
American Engineer.
1) Inventor of a safety device that prevents elevators from falling if the hoisting cable fails.
2) In 1845 he first came to idea to make an elevator with automatic break. He gained much publicity during 1854 New York World's Fair. There he presented his automatic break elevator with a demonstration in which axe man cut the rope that held the elevator with Otis in it. After that his company started getting many orders of his safe elevators every year.
