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Topic: Electric light bulb

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Electric bulb

	The First Electric Light Bulb
		Electricity is now supplied and in sufficient quantity, so as to heat the carbon within the vessel to a State of incandescence, the rarified gas previously introduced now becomes luminous, and constitutes the light herein designated as Woodward and Evans' Electric Light.
		This process will give a light of any required intensity, and there is practically no limit to the number of lights that may be obtained from one Magneto Electric Machine.
		In fact he was not granted a patent because his "invention" too closely resembled an invention in the UK of a filament in a vacuum tube, developed by Joseph Swan in the 1860's.
	www.mysteriesofcanada.com /Ontario/first_electric_light_bulb.htm (938 words)

	Howstuffworks "How Light Bulbs Work"
		Before the invention of the light bulb, illuminating the world after the sun went down was a messy, arduous, hazardous task.
		Electric current in a solid conductor is the mass movement of free electrons (electrons that are not tightly bound to an atom) from a negatively charged area to a positively charged area.
		The filament in a light bulb is housed in a sealed, oxygen-free chamber to prevent combustion.
	home.howstuffworks.com /light-bulb.htm (1507 words)

	Miniature electric light bulb sets for decorative illumination - Patent 4228486
		In this case, the electric bulbs are fitted detachably to husk portions 12 and 12', and lead wire 11a of the electric bulb contacts terminals 12b mounted on the leads 5 and 5' to form a circuit (refer to FIG.
		In this case, since the miniature electric light bulb groups are disposed as a whole in a parallel circuit, the flashing actions of each unit of the miniature electric light bulbs are different, and as a whole, two sets of the electric light bulb groups have alternate and staggered flashing times which demonstrate decorative effects.
		Since the miniature electric light bulb groups are connected in series to single electric wires branched in parallel, the connection of two pieces of electric wires to the husk portions holding the miniature electric light bulbs is only required which results in a simple body.
	www.freepatentsonline.com /4228486.html (838 words)

	Seasonal Affective Disorder, Full Spectrum Light Bulb, Sad, Happy Eyes Lamps, Neodymium Light Bulbs, Full Spectrum Lamp
		One, the light is perceived to have the bluish white appearance and brightness values of daylight and, two, the light has strong color rendering capabilities.
		Electric light bulbs (often fluorescent) can be manufactured to produce light that simulates the bluish white color and perceived brightness of daylight.
		Because "full spectrum" light bulbs produce the appearance of white or bluish-white light and because they also produce a higher perception of brightness, there is often a positive association with daylight.
	www.topbulb.com /find/full_spectrum.asp_Q_REF_E_5015 (922 words)

	Electric light bulb patent invention (Site not responding. Last check: 2007-10-26)
		It is not possible in the case of such a high-voltage halogen incandescent lamp to achieve any significant increase in light yield with the aid of an interference filter in accordance with WO 95/34910 that is fitted on the lamp vessel, or with the aid of an ellipsoidal sleeve in accordance with U.S. Pat.
		[0005] It is the object of the invention to improve the light yield in the case of an electric incandescent lamp, in particular in the case of a high-voltage halogen incandescent lamp whose incandescent filament has filament sections arranged outside the axis of symmetry of the lamp vessel.
		The invention thereby enables the light yield to be raised independently of the shape of the lamp vessel, and independently of the alignment of the incandescent filament inside the lamp vessel.
	www.freshpatents.com /Electric-light-bulb-dt20051103ptan20050242733.php (2139 words)

	Light Bulb Supply Co.
		Since 1960, Light Bulb Supply, one of the largest lighting suppliers in the Rocky Mountain region has maintained the highest standard of commitment to customer satisfaction.
		And, as the largest distributor of General Electric lighting products in this region, we enjoy the backing of their solid, highly respected corporate structure.
		Light Bulb Supply was formed in 1960 to meet the lighting needs of companies in the Denver area.
	www.lightbulbsupplyco.com /aboutus.cfm (213 words)

	Gillroy's Electrical Tools: ARMORED CABLE CUTTER,4 TON POWER PULL,LIGHT BULB CHANGING KIT,FUSE PULLER,WIRE ...
		Antenna Wire & Fittings : Doorbells & Push Buttons : Electrical Conduit : Electrical Tape : Electrical Tools : Extension Cord Holders : Extension Cords : Ground Rods : Immersion Heaters : Power Strips : More...
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	electrical.gillroys.com /Electrical_Tools-d66825.html (377 words)

	Ockham's Razor:11 July 2004 - The Electric Bulb
		Whether in use or not, an electric bulb is a symbol for excessive material consumption; whilst one can use the utility of artificial light in small measures, it is impossible to use it sparingly.
		This is another of the light bulb’s material excesses, where light proceeds from its central filament to the edges of rooms and spaces where it effaces the dark, chasing shadows up against walls until they are dissipated.
		Such illuminations subjugate the night and while the electric bulb has become one of the key markers for the idea of a civil culture, enabling and defining industry, social space and private life, its surplus light casts a shadow over other parts of the world where there are no light switches.
	www.abc.net.au /rn/science/ockham/stories/s1150235.htm (1704 words)

	How Things Work - Incandescent Light Bulbs
		In this case, the infrared light is emitted by electrons that are shifting from one group of quantum levels in a semiconductor to another group--from conduction levels to valence levels.
		Incandescent light is the thermal radiation emitted by a hot object such as the filament of a light bulb or the surface of the sun.
		The switch carefully controls the flow of electricity to the two filaments so that at the low light setting, only the small filament is on, at the medium setting, only the large filament is on, and at the high setting, both filaments are on.
	rabi.phys.virginia.edu /HTW/incandescent_light_bulbs.html (8053 words)

	Topbulb - Your Any light bulb any time company, with projector bulbs, LCD bulbs, compact fluorescent light bulbs, enx, ... (Site not responding. Last check: 2007-10-26)
		EKE bulb or ENB bulb (150 watt MR16 bulb)
		EXN bulb (50 watt MR16 40º beam bulb)
		EXZ bulb (50 watt MR16 24º beam bulb)
	www.topbulb.com (338 words)

	History of Light: GE Commercial Lighting Products
		Edison's greatest contribution to the problem of electric light was in filament design.
		The invention of the electric light bulb was announced in the New York Herald on December 21, 1879.
		Light bulbs went on sale in 1880, and while the first full-scale introduction of the Edison lighting system was made in London at Holburn Viaduct in early 1882, the era of general electric illumination via a centralized municipal power source began on September 4, 1882 at the Pearl Street Station, New York City.
	www.gelighting.com /na/business_lighting/education_resources/learn_about_light/history_of_light/index.htm (211 words)

	The Light Bulb
		The light bulb is the basis our this hi-tech culture that we live in, not just the electric light but its offspring have created a world of marvelous technology that gives us tools to do everyday things that people 50 years ago would thought subjects for a science fiction novel.
		The secret is that the bulb is fortified with extra filament to withstand jolts better, a high concentration of krypton gas to maintain brightness, and a device which transforms the alternating current entering the bulb into a direct current to conserve power.
		One bright light is what the sulfur bulb is. It is no larger that a tootsie-pop but one 5,900 watt bulb generates the same amount of light as hundreds of today's industrial high-intensity mercury-vapor lamps while using 20 to 30 percent less energy.
	asms.k12.ar.us /classes/humanities/amstud/97-98/edison2/webdoc2.htm (880 words)

	[No title]
		These A19 long life light bulbs are the longest lasting light bulbs you will get with an average life of 20,000 hours, better than ge lamps, philips or osram sylvania long life light bulbs.
		Light bulbs have not changed much since they were invented by Thomas Edison 125 years ago.
		The invention of the light bulb is usually attributed in Britain to Joseph Wilson Swan and in the United States to Thomas Alva Edison (who first marketed the device successfully).
	www.lycos.com /info/light-bulb.html (493 words)

	CBC4Kids: History of Inventions, a timeline from Pottery to Computers.
		These lights weren't very practical though, because they burned out too quickly, plus they were much too bright to use in homes.
		The electric light as we know it today was invented simultaneously in 1879 by two people: Thomas Alva Edison in the United States and Sir Joseph Wilson Swan in England.
		Swan was actually the first to make an electric light bulb, but he had trouble maintaining a vacuum in his bulb.
	www.cbc.ca /kids/general/the-lab/history-of-invention/lightbulb.html (281 words)

	Electric Light Bulbs
		Several inventors came up with light bulbs prior to Edison but none were commercially viable until his carbonized cotton filament lamp.
		It was very difficult to remove the air from the base of a bulb, although it could and was done for lamps requiring special optical characteristics, although they were comparatively expensive.
		When electricity began to flow through the filament, the magnetic disconnect removed the heating coil from the circuit and the ballast tubes provided a constant voltage through the filament.
	www.thezephyr.com /collect/collectg.htm (1073 words)

	Light Therapy Different Type of Illumination Sources, Common Electric Light Bulb, Fluorescent Strip Lighting Full ...
		The light generated is adequate to see with, but is quite different from the light of the sun.
		This is because most of the energy that an electric bulb uses is wasted in producing infrared radiation (heat), only about six per cent of the energy input is used to produce light.
		Broad spectrum light bulbs are described as being a pure white light.
	www.holistic-online.com /Light_Therapy/light_ill_sources.htm (697 words)

	Lewis Latimer - The Black Inventor Online Museum
		The light was composed of a glass bulb which surrounded a carbon wire filament, generally made of bamboo, paper or thread.
		Because he was working at the time for US Electric Lighting Company, he was forced to assign the patent to the company, and thus lost out on the enormous financial rewards which would result.
		Latimer abilities in electric lighting became well known and soon he was sought after to continue to improve on incandescent lighting as well as arc lighting.
	www.blackinventor.com /pages/lewislatimer.html (1029 words)

	Learn About Light
		In 1879, Thomas Edison invented the "practical" electric light bulb.
		The colour rendering of a light source describes that source's ability to accurately render the colours of perceived objects - people and things.
		Light from the sun brings energy to the earth...
	www.gelighting.com /au/resources/learn_about_light/index.htm (176 words)

	General Electric : The 125th Anniversary of the Light Bulb (Site not responding. Last check: 2007-10-26)
		In 1879, using lower current electricity, a small, carbonized filament, and an improved vacuum inside the globe, he was able to produce a reliable long-lasting source of light.
		Edison's eventual achievement was inventing not only an incandescent electric light, but also an electric lighting system that contained all the elements necessary to make the incandescent light practical, safe and economical.
		Edison may have invented incandescent lighting, but the years since have been witness to an amazing series of improvements and new technologies, many of which were developed by the researchers at General Electric - Nela Park.
	www.ge.com /stories/en/20277.html?category=Product_Home (624 words)

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