Inventors and Inventions

1. Inventors and Inventions By: Leslie, Su Hian, Isaac, David Law

2. Famous inventor(Thomas Edison)and his inventions and life Thomas Edison: Born at February 11 1847 Milan, Ohio. Died at October 18 1931 West Orange. New Jersey(74 years old). had three children Thomas was the 3rd most prolific inventor in the world he was one of the first inventors to apply the principles of mass production and large teamwork to the process of invention. made the light bulb.

3. Famous inventor(Spencer Sliver) and his inventions and life Dr. Spencer Sliver : Born : 6 February 1941 Santiago, Texas is an American chemist who, together with Arthur Fry, invented Post-it notes in 1970. He majored in chemistry at Arizona State University, earning a B.S. in 1962, then earned a doctorate in organic chemistry from the University of Colorado in 1966, before taking a position as a Senior Chemist in 3M's Central Research Labs. In 1968, Silver developed a high-quality but "low-tack" adhesive, made of tiny, indestructible acrylic spheres that would stick only where they were tangent to a given surface, rather than flat up against it and could be used again and again. Silver wanted to market the adhesive as a spray, or as a surface for bulletin boards on which temporary notices could be easily posted and then removed. Over the next five years, Silver tried to interest his colleagues at 3M, informally and in presentations. The product was not popular until Arthur Fry attended one of Silver's seminars. Fry sang in his church choir and was frustrated with the paper bookmarks he used to mark the songs because they would not stay put.,Fry realized that Silver's reusable adhesive would be what he needed. Fry wrote up his idea for a reusable bookmark and presented it to his supervisors. Initially, management was sceptical, but the staff could not get enough of the samples Fry was passing around. Soon, 3M gave the invention its full support. It took another five years to manufacture the product, but on April 6, 1980, Post-it Notes were introduced nationwide in the US. Within two years, the product became very popular in the office, schools, labs, libraries and homes. Both Silver and Fry won 3M's highest honours for research and numerous awards within the international engineering community. Silver still works at 3M, specializing in adhesives technology. In his spare time, he has also won a reputation as an accomplished painter in pastels and oils

4. Famousinventor(alexander graham bell) and his invention and life • Alexander Graham Bell (March 3, 1847 – August 2, 1922) was an eminent scientist, inventor, engineer and innovator who is credited with inventing the first practical telephone. • Two sons who died in infancy and two daughters. • Many other inventions marked Bell's later life, including ground breaking work in optical telecommunications, hydrofoils and aeronautics. In 1888, Alexander Graham Bell became one of the founding members of the National Geographic Society. Bell has been described as one of the most influential figures in human history.

5. History of airplanes • The first airplane in the world is known as the glider made by Sir George Cayel but it could not fit any passengers • while working in a bicycle workshop the wright brothers got interested in flying They read all the books they could find about airplanes to learn more about them. • They then began building gliders near Kitty Hawk, North Carolina. The Wright Brothers improved the glider. After working on glider experiments they found out how to steer a plane while in flight by developing a rudder (the tail of the plane) and flaps on the wings. With the rudder and the flaps, the pilot could control the direction of the airplane and the height. • In December of 1903, the Wright Brothers became the first people to successfully fly a plane with a person in it. The plane flew one hundred twenty feet and flew only about twelve seconds. They had three successful flights that day, but Wilbur made the longest flight of 892 feet and stayed up for about 59 seconds. In 1903 the Wright Brothers made their first powered airplane that they named the "flyer." It was a biplane (two winged plane) that had a 12 horse power engine that they had built themselves. The wings were 40 feet wide, wooden, and covered with cotton cloth. The pilot would lay on the lower wing on his stomach and steer the plane. In 1908 the Wright Brothers finally made a plane that could fly for more that one and a half hours.

6. History of light bulb The invention of the incandescent light bulb has a history spanning from the early 1800s. Until that time, available light sources consisted of candles, oil lanterns, and gas lamps. In 1809, an English chemist, Humphrey Davy, started the journey to the invention of a practical incandescent light source. He used a high power battery to induce current between two charcoal strips. The current flowing through the two charcoal strips produced an intense incandescent light, creating the first arc lamp. In 1820, Warren De la Rue made the first known attempt to produce an incandescent light bulb. He enclosed a platinum coil in an evacuated tube and passed an electric current through it. The design was based on the concept that the high melting point of platinum would allow it to operate at high temperatures and that the evacuated chamber would contain less gas particles to react with the platinum, improving its longevity. Although it was an efficient design, the cost of the platinum made it impractical for commercial use.

7. Thank you for listening! 