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| 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. |
| 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. |
| CARLSON, CHESTER F. Chester Floyd Carlson (1906-1968) invented xerography (which means "dry writing" in Greek) in 1938. Xerography makes paper copies without using ink (hence its name). In this process, static electricity charges a lighted plate; a plastic powder (called toner) is applied to the areas of the page to remain white. Chester F. Carlson was born in Seattle, Washington, USA. As a teenager, Carlson supported his invalid parents by publishing a chemical journal. After attending Cal Tech in physics, Carlson worked at an electronics firm. Carlson later experimented at home to find an efficient way of copying pages. He succeeded in 1938, and marketed his revolutionary device to about 20 companies before he could interest any. The Haloid Company (later called the Xerox Corporation) marketed it, and photocopying eventually became common and inexpensive. |
 EDISON, THOMAS ALVAThomas Alva Edison (1847-1931) was an American inventor (also known as the Wizard of Menlo Park) whose many inventions revolutionized the world. His work includes improving the following: the incandescent electric light bulb, the phonograph, the phonograph record, the carbon telephone transmitter, and the motion-picture projector.
Edison's first job was as a telegraph operator, and in the course of his duties, he redesigned the stock-ticker machine. The Edison Universal Stock Printer gave him the capital ($40,000) to set up a laboratory in Menlo Park, New Jersey, to invent full-time (with many employees).
Edison and General Electric fiercely promoted the use of direct current (Westinghouse and Nikola Tesla developed and promoted the use of the more useful alternating current, which eventually became the standard). In 1887, Edison moved his lab to West Orange, New Jersey, and employed about 5,000 people. Altogether, Edison patented 1,093 inventions. Edison was quoted as saying, "Genius is one percent inspiration and 99 percent perspiration." On October 21, 1931, a few days after Edison's death, electric lights in the United States were dimmed for one minute. |
| GUTENBERG, JOHANNES Johannes Gutenberg (the 1300's-1468) was a German craftsman, inventor, and printer who invented the first printing press with movable type in 1450. This invention revolutionized printing, making it simpler and more affordable. Gutenberg produced dies (molds) for easily producing individual pieces of metal type that could be made, assembled, and later reused. Gutenberg's new press could print a page every three minutes. This made printed material available to the masses for the first time in history. Religious materials were the majority of the early printed materials. The use of printing presses began the standardization of spelling. |
LAND, E. H.  Edwin Herbert Land (1909-1991) was an American physicist and inventor who developed the first modern light polarizers (which eliminate glare) and other optical devices, investigated the mechanisms of color perception, and developed the instant photography process (the Polaroid camera). Land established the Polaroid Corp. in 1937. |
| MARCONI, GUGLIELMO Guglielmo Marconi (1874-1937) was an Italian inventor and physicist. In 1895, Marconi promoted and popularized the radio (wireless telegraphy), building machinery to transmit and receive radio waves. His first transmission across an ocean (the Atlantic Ocean) was on December 12, 1901. Marconi won the Nobel Prize for Physics in 1909. |
MORSE, SAMUEL F. B. Samuel Finley Breese Morse (1791-1872) was an American inventor and painter. After a successful career painting in oils (first painting historical scenes and then portraits), Morse built the first American telegraph around 1835 (the telegraph was also being developed independently in Europe).
A telegraph sends electrical signals over a long distance, through wires. In 1830, Joseph Henry (1797-1878) made the first long-distance telegraphic device - he sent an electric current for over a mile on wire that activated an electromagnet, causing a bell to ring. Morse patented a working telegraph machine in 1837, with help from his business partners Leonard Gale and Alfred Vail. Morse used a dots-and-spaces code for the letters of the alphabet and the numbers (Morse Code was later improved to use dots, dashes and spaces: for example E is dot, T is dash, A is dot-dash, N is dash-dot, O is dash-dash-dash, I is dot-dot, S is dot-dot-dot, etc.). By 1838, Morse could send 10 words per minute. Congress provided funds for building a telegraph line between Washington D.C. and Baltimore, Maryland, in 1843. Morse sent the first telegraphic message (from Washington D.C. to Baltimore) on May 24, 1844; the message was: "What hath God wrought?" The telegraph revolutionized long-distance communications. |
| POLAROID CAMERAThe Polaroid camera is a camera that develops the photograph while you wait (one-step photography ). It was invented by Edwin Herbert Land (1909-1991), an American physicist and inventor who also investigated the mechanisms of color perception, developed the first modern light polarizers (which eliminate glare), and other optical devices. Land established the Polaroid Corp. in 1937. |
| PRINTING PRESS WITH MOVABLE TYPE The first printing press with movable type was invented in 1450 by Johannes Gutenberg. This invention revolutionized printing, making it simpler and more affordable. Gutenberg produced dies (molds) for easily producing individual pieces of metal type that could be made, assembled, and later reused. Gutenberg's new press could print a page every three minutes. This made printed material available to the masses for the first time in history. Religious materials were the majority of the early printed materials. The use of printing presses began the standardization of spelling. |
| RADIO The radio was invented by Nikola Tesla. The radio was promoted and popularized by Guglielmo Marconi in 1895. The first radio transmission across an ocean (the Atlantic Ocean) occurred on December 12, 1901. |
RECORD Records, used to record sound, were invented in 1877 by Thomas Alva Edison, who invented the first machine to record and play back sounds (the phonograph or record player). Early records were cylindrical, but flat disks soon replaced them.
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| TELEGRAPHSamuel Finley Breese Morse (1791-1872) was an American inventor and painter. After a successful career painting in oils (first painting historical scenes and then portraits), Morse built the first American telegraph around 1835 (the telegraph was also being developed independently in Europe).
A telegraph sends electrical signals over a long distance, through wires. In 1830, Joseph Henry (1797-1878) made the first long-distance telegraphic device - he sent an electric current for over a mile on wire that activated an electromagnet, causing a bell to ring. Morse patented a working telegraph machine in 1837, with help from his business partners Leonard Gale and Alfred Vail. Morse used a dots-and-spaces code for the letters of the alphabet and the numbers (Morse Code was later improved to use dots, dashes and spaces: for example E is dot, T is dash, A is dot-dash, N is dash-dot, O is dash-dash-dash, I is dot-dot, S is dot-dot-dot, etc.). By 1838, Morse could send 10 words per minute. Congress provided funds for building a telegraph line between Washington D.C. and Baltimore, Maryland, in 1843. Morse sent the first telegraphic message (from Washington D.C. to Baltimore) on May 24, 1844; the message was: "What hath God wrought?" The telegraph revolutionized long-distance communications. |
| TELEPHONE The telephone (meaning "far sound") is the most widely used telecommunications device. It was invented in 1876 by Alexander Graham Bell (with Thomas Watson). Bell patented his invention on March 1876 (patent No. 174,465). His device transmitted speech sounds over electric wires, and his idea has remained one of the most useful inventions ever made. |
| XEROGRAPHY Xerography (which means "dry writing" in Greek) is a process of making copies that was invented in 1938 by Chester Floyd Carlson (1906-1968). Xerography makes copies without using ink (hence its name). In this process, static electricity charges a lighted plate; a plastic powder (called toner) is applied to the areas of the page to remain white. Carlson marketed his revolutionary device to about 20 companies before he could interest any. The Haloid Company (later called the Xerox Corporation) marketed it, and photocopying eventually became common and inexpensive. |
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BAIRD, JOHN LOGIE
The first non-leaking ballpoint pen was invented in 1935 by the Hungarian brothers Lazlo and Georg Biro. Lazlo was a chemist and Georg was a newspaper editor.
CAXTON, WILLIAM
George Eastman (1854-1932) was an American inventor who made many improvements in photography. Eastman invented the dry plate method in 1879; this was an improvement in the wet plate process photographic process). He founded the Eastman Dry Plate company in 1881, located in Rochester, New York. Eastman and William Walker invented flexible roll film in 1882, eliminating the necessity of using cumbersome glass plates for photography. Eastman produced the first simple, all-purpose, fixed-focus camera in 1888, which sold for $25.00; this was the first KODAK Camera . By 1900, Eastman Kodak was producing a camera that cost only one dollar. Early cameras took round pictures. To get the film developed, the photographer had to send the entire camera to the Rochester factory. The company name was changed to Eastman Kodak Company in 1892, and is still one of the largest photographic companies in the world.
Lewis E. Waterman was an American inventor and insurance salesman who developed a relatively leak-proof fountain pen; he patented his new invention in 1884 and revolutionized writing. Before his fountain pen, pen tips had to be tipped into ink after every few words. Waterman put an ink reservoir in the pen above the pen's metal nib (point). This reservoir would hold enough ink for a few pages of writing. There were many problems in developing the fountain pen, especially the difficulty of controlling the flow of the ink. Putting a sealed reservoir above the nib wouldn't let the ink flow, but if it wasn't sealed, all the ink would flow at once. Waterman used capillary action to replace the ink in the rubber sac with air so that the ink flowed smoothly but did not flow all at once. Also, the metals in the ink dissolved the steel pen nib, so Waterman used an iridium-plated gold nib. Waterman was also the first person to place a clip on the cap of the pen.
Paper is writing material made from wood pulp or other fibrous material.
The paper clip was invented in 1899 or 1890 by a Norwegian patent clerk called Johann Vaaler. His original paper clip was a thin spring-steel wire with triangular or square ends and two "tongues." Vaaler patented his invention in Germany and later in the USA (1901).
The "lead" pencil (which contains no lead) was invented in 1564 when a huge graphite (black carbon) mine was discovered in England. The pure graphite was sawn into sheets and then cut into square rods. The graphite rods were inserted into hand-carved wooden holders, forming pencils. They were called lead pencils by mistake - at the time, graphite was called black lead or "plumbago," from the Greek word for lead (it looked and acted like lead, and it was not known at the time that graphite consisted of carbon and not lead).
The first typewriter was invented in 1867 by the American printer and editor Christopher Latham Sholes (Feb. 14, 1819 - Feb. 17, 1890). Sholes' prototype had the user hit a key (for each letter and number), which struck upward onto a flat plate, producing a carbon impression of the letter or number on the paper. He made the prototype using the key of an old telegraph transmitter. There was no way of spacing the letters, no carriage return, and no shift keys; these features would be added to later models.