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The Light bulb

The Light bulb. By: Allyson Carter. The light bulb. Changed society, history, and everyday life. replaced fire torches, candles, and oil and gas lamps. Timeline of the electric light bulb. 1801 – Sir Humphry Davy discovered platinum filaments.

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The Light bulb

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  1. The Light bulb By: Allyson Carter

  2. The light bulb • Changed society, history, and everyday life. • replaced fire • torches, candles, and oil and gas lamps

  3. Timeline of the electric light bulb • 1801 – Sir Humphry Davy discovered platinum filaments. • 1809 – Davy created the first electric carbon arc lamp. • 1820 – Warren De la Rue created a lamp that worked but was to expensive for wide-spread use. • 1850 – Edward Shepard invented an electrical incandescent arc lamp using a charcoal filament. • 1854 – German Henricg Globel created the first true light bulb • used a carbonized bamboo filament inside a glass bulb. • 1875 – Herman Sprengel invented the mercury vacuum pump • Made it possible to get a good vacuum inside a bulb. • 1875 – Henry Woodward and Matthew Evans patented a light bulb. • 1878 - Sir Joseph Wilson Swan invented a light bulb that lasted for 13.5 hrs. • used a carbonized cotton filament.

  4. Timeline Continued • 1879 - Thomas Alva Edison invented a light bulb that burned for 40 hrs. • placed filament in an oxygen-less bulb. • His ideas were based on the 1875 patent he purchased from Henry Woodward and Matthew Evans. • 1880 - Edison continued to improved his light bulb until it could last for over 1,200 hours • Used a bamboo-derived filament. • 1903 - Willis Whitnew invented a filament that would not make the inside of a light bulb turn dark. • Used a metal-coated carbon filament • 1906 - The General Electric Company patented the use of tungsten filaments for use in light bulbs. • These filaments were expensive. • 1910 - William David Coolidge invented an improved method of making tungsten filaments. • outlasted other types of filaments • made costs practical. • 1925 - The first frosted light bulbs were produced. • 1991 – Philips Company invented a light bulb that lasts 60,000 hours.

  5. Thomas Edison • father of the modern-day electric light bulb.

  6. Diagram of a light bulb • Outline of Glass bulb • Low pressure inert gas (argon, neon, nitrogen) • Filament • Contact wire (goes out of stem) • Contact wire (goes into stem) • Support wires • Stem (glass mount) • Contact wire (goes out of stem) • Cap (sleeve) • Insulation • Electrical contact

  7. Social Impacts • Longer hours • Production continued after the sun sets. • Consumption • 1885 - 300,000 • 1914 - over 88.5 million • 1945 - 795 million

  8. Impacts on Culture and Society • Modern day inventions • Music • Cinema • Internet • Video games. • We became an electrified world.

  9. Thomas Edison’s original light bulbs. • An original carbon-filament bulb

  10. Impact on the Environment • Use higher amounts of energy • Push for more energy efficient options. • Compact fluorescent light bulbs (CFLs) • Government legislation • The United States legislation. • Resistance. • low cost of incandescent bulbs • negative health effects of CFLs

  11. The Centennial Bulb - A 110 year old bulb! Besides two short moves and a few power outages, this hand-blown bulb with a carbon filament has burned steadily since June, 1901! • World’s longest-living light bulb

  12. Live webcam of the Centennial Bulb http://www.centennialbulb.org/photos.htm

  13. Conclusion • Longer production hours • Continue activities after the setting of the sun • Development of movies, internet, radio, etc.

  14. Resources • Acton, J. Incandescent light bulb. Retrieved from http://www.answers.com/topic/incandescent-light-bulb • Alelsto, Jo. (2009). Electric Light Bulb - The Origin of Modern T echnology. Retrieved from http://ezinearticles.com/?Electric- Light-Bulb---The-Origin-of-Modern-Technology&id=2093135 • Bellis, M. The Inventions of Thomas Edison: History of phonograph –lightbulb- motion pictures. Retrieved from http://inventors.about.com/library/inventors/bledison.htm • Centennial Light Bulb Committee. Livermore’s Centennial Light. Retrieved from http://www.centennialbulb.org/index.htm • Fischetti, M. (2008). The Switch is On. Scienctific American, 298(3), 98-99. • Light bulb. (2007). Retrieved from http://www.ideafinder.com/history/inventions/lightbulb.htm

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