User:Panetta1

The Light bulb

•	what led to the development of the technology

The creation of the light bulb is unknown Thomas Edison got a patent on the light bulb on January 27 1880. It was created because the normal way of light was a gas lamp. Gas lamps were a non practical solution for lighting. They were dirty spreading soot created by the flame everywhere, depleted the oxygen in the air and caused explosions. It also made the summers hotter in the house because it would heat the house up. •	who invented the technology

Thomas Edison invented the light bulb on January 27 1880 because the gas lamp was an inconvenient scarce of light.

•	when did societies start to use the technology

Societies started to use the light bulb in 1882. The first city to use the light bulb was New York and it spread from there.

•	How has the technology changed over the years

The light bulb has changed dramatically over the years. From incandescent to energy saving compact florescent bulbs. The principles are the same but the parts aren’t. The parts of the incandescent bulb include: 1-	a glass casing 2-	inert gas 3-	the filament 4-	contact wire to foot 5-	contact wire to base 6-	support wires 7-	glass mount 8-	the base 9-	screw threads 10-	 insulation 11-	 Electrical contact The parts in compact florescent bulbs are the same except the inert gasses are different.