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Zoom Inventors and Inventions |
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| BAROMETER A barometer is a device that measures air (barometric) pressure. It measures the weight of the column of air that extends from the instrument to the top of the atmosphere. There are two types of barometers commonly used today, mercury and aneroid (meaning "fluidless"). Earlier water barometers (also known as "storm glasses") date from the 17th century. The mercury barometer was invented by the Italian physicist Evangelista Torricelli (1608 - 1647), a pupil of Galileo, in 1643. Torricelli inverted a glass tube filled with mercury into another container of mercury; the mercury in the tube "weighs" the air in the atmosphere above the tube. The aneroid barometer (using a spring balance instead of a liquid) was invented by the French scientist Lucien Vidie in 1843. |
| BASKETBALL |
| BATTERY A battery is a device that converts chemical energy into electrical energy. Each battery has two electrodes, an anode (the positive end) and a cathode (the negative end). An electrical circuit runs between these two electrodes, going through a chemical called an electrolyte (which can be either liquid or solid). This unit consisting of two electrodes is called a cell (often called a voltaic cell or pile). Batteries are used to power many devices and make the spark that starts a gasoline engine. Alessandro Volta was an Italian physicist invented the first chemical battery in 1800. Storage batteries are lead-based batteries that can be recharged. In 1859, the French physicist Gaston Plante (1834-1889) invented a battery made from two lead plates joined by a wire and immersed in a sulfuric acid electrolyte; this was the first storage battery. The dry cell is a an improved voltaic cell with a cylindrical zinc shell (the zinc acts as both the cathode and the container) that is lined with an ammonium chloride (the electrolyte) saturated material (and not a liquid). The dry cell battery was developed in the 1870s-1870s by Georges Leclanche of France, who used an electrolyte in the form of a paste. Edison batteries (also called alkaline batteries) are an improved type of storage battery developed by Thomas Edison. These batteries have an alkaline electrolyte, and not an acid. |
| BELL, ALEXANDER GRAHAM Alexander Graham Bell (March 3, 1847, Edinburgh, Scotland - August 2, 1922, Baddek, Nova Scotia) invented the telephone (with Thomas Watson) in 1876. Bell also improved Thomas Edison's phonograph. Bell invented the multiple telegraph (1875), the hydroairplane, the photo-sensitive selenium cell (the photophone, a wireless phone, developed with Sumner Tainter), and new techniques for teaching the deaf to speak. In 1882, Bell and his father-in-law, Gardiner Hubbard, bought and re-organized the journal "Science." Bell, Hubbard and others founded the National Geographic Society in 1888; Bell was the President of the National Geographic Society from 1898 to 1903. |
| BICYCLE For a bicycle diagram printout to label, click here. For more information on the invention of the bicycle, click here. |
| BIFOCAL GLASSES |
| BLOOD BANK The idea of a blood bank was pioneered by Dr. Charles Richard Drew (1904-1950). Dr. Drew was an American medical doctor and surgeon who started the idea of a blood bank and a system for the long term preservation of blood plasma (he found that plasma kept longer than whole blood). His ideas revolutionized the medical profession and saved many, many lives. Dr. Drew set up and operated the blood plasma bank at the Presbyterian Hospital in New York City, NY. Drew's project was the model for the Red Cross' system of blood banks, of which he became the first director. |
| BRAILLE Braille is a coded system of raised dots that are used by the blind to read. Louis Braille (1809-1852) invented this system in 1829. Braille published "The Method of Writing Words, Music, and Plain Song by Means of Dots, for Use by the Blind and Arranged by Them," and his method is still in use around the world today. |
| BRAILLE, LOUIS Louis Braille (1809-1852) improved a coded system of raised dots used by the blind to read. He was blinded as a child, and invented his extraordinary system in his early teens. In 1829, Braille published "The Method of Writing Words, Music, and Plain Song by Means of Dots, for Use by the Blind and Arranged by Them." His method, called Braille, is still in use around the world today. Louis Braille is buried in the Pantheon in Paris, as a French national hero. For a worksheet on Braille, click here. |
| BRAILLE TYPEWRITER The Hall Braille typewriter (also called a Braillewriter or Brailler) was invented in 1892 by Frank Haven Hall. Hall was the Superintendent of the Illinois Institution for the Blind. The Hall Braille typewriter was manufactured by the Harrison & Seifried company in Chicago, Illinois, USA. Hall introduced his invention on May 27, 1892, at Jacksonville, Illinois. It types raised Braille dots onto paper. |
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| Guidelines on Writing a Report on an Invention |
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