Incandescent Light Bulb by Thomas Edison Patent Poster

The incandescent light bulb, incandescent lamp or incandescent light globe makes light by heating a metal filament wire to a high temperature until it glows. The hot filament is protected from air by a glass bulb that is filled with inert gas or evacuated. In a halogen lamp, a chemical process returns metal to the filament, extending its life. The light bulb is supplied with electrical current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which supports the bulb mechanically and connects the current supply to the bulb's electrical terminals. Image reproduction rights can be found in the link near the bottom of this description. Sign up to Mr. Rebates for FREE and save 12% on any zazzle order in addition to a $5.00 sign up bonus All Rights Reserved; without: prejudice, recourse or notice (U.C.C. 1-308) Image Reproduction Rights: http://www.flickr.com/photos/usnationalarchives/5286032634/in/set-72157625533748185/ http://www.flickr.com/photos/usnationalarchives/5286032832/in/set-72157625533748185/ "light bulb" incandescent light bulb patent "light bulb patent" "thomas edison" "incandescent light bulb" "incandescent lamp" "incandescent light globe" "patent file" invention "invention patent" "famous invention" "historic invention" technology "historic technology" tech "famous technology" "artificial light" "electric light" edison