HISTORY
OF
BULB
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| The Story: By the time of Edison's 1879 lamp invention, gas lighting was a mature, well-established industry. The gas infrastructure was in place, franchises had been granted, and manufacturing facilities for both gas and equipment were in profitable operation. Perhaps as important, people had grown accustomed to the idea of lighting with gas. Incandescent lamps make light by using electricity to heat a thin strip of material (called a filament) until it gets hot enough to glow. Many inventors had tried to perfect incandescent lamps to "sub-divide" electric light or make it smaller and weaker than it was in the existing electric arc lamps, which were too bright to be used for small spaces such as the rooms of a house.Edison was neither the first nor the only person trying to invent an incandescent electric lamp. Many inventors had tried and failed some were discouraged and went on to invent other devices. Among those inventors who made a step forward in understanding the eclectic light were Sir Humphrey Davy,Warren De la Rue, James Bowman Lindsay, James Prescott Joule, Frederick de Moleyns and Heinrich Göbel. Between the years 1878 and 1892 the electric light industry was growing in terms of installed lights but shrinking in terms of company competition as both Thomas Edison and George Westinghouse determined to control the industry and its advancement. They even formed the Board of Patent Control, a joint arrangement between General Electric and the Westinghouse Company to defend the patents of the two companies in litigation. This proved to be a wise decision as over 600 lawsuits for patent infringement were filed. The easiest way to understand those turbulent times in the early lighting industry is to follow the company's involved. Of the hundreds of companies in the business, we only cover the major players. We show the flow of inventor's patents and inventor's companies and how the industry ended up monopolized by GE and Westinghouse. Company names listed in GREEN ultimately became part of General Electric. Company names listed in RED ultimately became part of Westinghouse.
American Electric Company.
Edison’s lamp would consist of a filament housed in a glass vacuum bulb. He had his own glass blowing shed where the fragile bulbs were carefully crafted for his experiments. Edison was trying to come up with a high resistance system that would require far less electrical power than was used for the arc lamps. This could eventually mean small electric lights suitable for home use.In the late 1870's high school teachers Elihu Thomson and Edwin Houston began experimenting with and patenting improvements on existing arc lamp and dynamo designs. In 1880 after being approached by a group of businessmen from New Britain CT, They all agreed to the formation of a company that would engage in the commercial manufacture of lighting systems (both arc and incandescent) based on their own patents. This was the American Electric Company which existed until 1883 when it was reorganized and was renamed the Thomson-Houston Electric Company. Brush Electric CompanyIn 1880, Charles F. Brush forms the Brush Electric Company. That same year he installs the first complete eclectic arc-lighting system in Wabash, Indiana. Wabash was the first American city to be lit solely by electricity and to own its own municipal power plant (that small dynamo driven by a threshing machine engine). The installation in Cleveland the year before had been a demonstration, but Cleveland would soon begin lighting its streets with arc lamps as well. In 1876 Charles F. Brush invented a new type of simple, reliable, self-regulating arc lamp, as well as a new dynamo designed to power it. Earlier attempts at self regulation had often depended on complex clockwork mechanisms that, among other things, could not automatically re-strike an arc if there were an interruption in power. The simpler Brush design for a lamp/dynamo system made central station lighting a possibility for the first time. Joseph Swan sold his United States patent rights to the Brush Electric Company in June 1882. In 1889, Brush Electric Company merged into the Thomson-Houston Electric Company. Edison Electric Light CompanyIn the period from 1878 to 1880 Edison and his associates worked on at least three thousand different theories to develop an efficient incandescent lamp. By January 1879, at his laboratory in Menlo Park, New Jersey, Edison had built his first high resistance, incandescent electric light. It worked by passing electricity through a thin platinum filament in the glass vacuum bulb, which delayed the filament from melting. Still, the lamp only burned for a few short hours. In order to improve the bulb, Edison needed all the persistence he had learned years before in his basement laboratory. He tested thousands and thousands of other materials to use for the filament. He even thought about using tungsten, which is the metal used for light bulb filaments now, but he couldn’t work with it given the tools available at that time. He tested the carbonized filaments of every plant imaginable, including bay wood, boxwood, hickory, cedar, flax, and bamboo. He even contacted biologists who sent him plant fibers from places in the tropics. Edison acknowledged that the work was tedious and very demanding, especially on his workers helping with the experiments. He always recognized the importance of hard work and determination. "Before I got through," he recalled, "I tested no fewer than 6,000 vegetable growths, and ransacked the world for the most suitable filament material." Edison decided to try a carbonized cotton thread filament. When voltage was applied to the completed bulb, it began to radiate a soft orange glow. Just about fifteen hours later, the filament finally burned out. Further experimentation produced filaments that could burn longer and longer with each test. By the end of 1880, he had produced a 16-watt bulb that could last for 1500 hours and he began to market his new invention. In Britain, Swan took Edison to court for patent infringement. Edison lost and as part of the settlement, Edison was forced to take Swan in as a partner in his British electric works. The company was called the Edison and Swan United Electric Company (later known as Ediswan which was then incorporated into Thorn Lighting Ltd). Eventually, Edison acquired all of Swan's interest in the company. Swan sold his United States patent rights to the Brush Electric Company in June 1882. In 1889 the Edison Electric Light Company merged with several other Edison companies to become the Edison General Electric Company. When the Edison General Electric Company merged with Thomson-Houston in 1892, a bitter struggle developed, Edison's name was dropped, and Edison himself had no more involvement with the newly formed General Eclectic Company beyond defending his patents.
In 1903 Willis Whitnew invented a filament that would not blacken the inside of a light bulb. It was a metal-coated carbon filament. In 1906, the General Electric Company was the first to patent a method of making tungsten filaments for use in incandescent light bulbs. The filaments were costly, but by 1910 William David Coolidge had invented an improved method of making tungsten filaments. The tungsten filament outlasted all other types of filaments and Coolidge made the costs practical.
Edison & Swan United Electric CompanyIn Britain, Joseph Swan took Edison to court for patent infringement. Edison lost and as part of the settlement, Edison was forced to take Swan in as a partner in his British electric works. The company was called the Edison and Swan United Electric Company (later known as Ediswan). Eventually, Edison acquired all of Swan's interest in the company. General Electric Company In 1892, a merger of Edison General Electric Company and Thomson-Houston Electric Company created General Electric Company. General Electric, GE is the only company listed in the Dow Jones Industrial Index today that was also included in the original index in 1896.
Sawyer & Man Electric Company William Sawyer and Albon Man are issued Patent No, 205,144 on June 18, 1878 for Improvements in Electric Lamps. In 1884, Albon Man formed the Sawyer & Man Electric Co for the purpose of protecting the Sawyer-Man electric lamp patent. William Sawyer had died the previous year. In 1886, the Thomson-Houston Electric Company purchased the Sawyer & Man Electric Company and began making incandescent lamps under the Sawyer-Man patents.
Swan Electric Light CompanyJoseph Wilson Swan (1828-1914) was a physicist and chemist born in Sunderland, England. Swan was the first to construct an electric light bulb, but he had trouble maintaining a vacuum in his bulb. In 1850 he began working on a light bulb using carbonized paper filaments in an evacuated glass bulb. By 1860 he was able to demonstrate a working device, and obtained a UK patent covering a partial vacuum, carbon filament incandescent lamp. However, the lack of good vacuum and an adequate electric source resulted in a short lifetime for the bulb and an inefficient light. Fifteen years later, in 1875, Swan returned to consider the problem of the light bulb and, with the aid of a better vacuum and a carbonized thread as a filament. The most significant feature of Swan's lamp was that there was little residual oxygen in the vacuum tube to ignite the filament, thus allowing the filament to glow almost white-hot without catching fire. Swan received a British patent for his device in 1878 . Swan had reported success to the Newcastle Chemical Society and at a lecture in Newcastle in February 1879 he demonstrated a working lamp. Starting that year he began installing light bulbs in homes and landmarks in England. In 1880, Swan gave the world's first large-scale public exhibition of electric lamps at Newcastle upon Tyne England. In 1881 he had started his own company, The Swan Electric Light Company, and started commercial production.
Swan took Edison to court in Britain for patent infringement. Edison lost and as part of the settlement, Edison was forced to take Swan in as a partner in his British electric works. The company was called the Edison and Swan United Electric Company (later known as Ediswan). Eventually, Edison acquired all of Swan's interest in the company. Also in 1882 Joseph Swan sold his United States patent rights to the Brush Electric Company, a successful "arc" street light manufacture.
Thomson-Houston Electric CompanyIn the late 1870's high school teachers Elihu Thomson, a teacher of physics and chemistry, and Edwin Houston, a science teacher, began experimenting with and patenting improvements on existing arc lamp and dynamo designs. In 1880 after being approached by a group of businessmen from New Britain CT, Thomson & Houston agreed to the formation of a company that would engage in the commercial manufacture of lighting systems (both arc and incandescent) based on their own patents. This was the American Electric Company which existed until 1883 when it was reorganized and was renamed the Thomson-Houston Electric Company. .
The company became quite successful and diversified into other electrical markets. In 1886 they purchased the Sawyer & Man Electric Co. and began making incandescent lamps under the Sawyer-Man patents. In 1889 in an attempt to avoid patent disputes over a double-carbon arc lamp design, Thomson-Houston negotiated the purchase of a controlling interest in the Brush company. The Swan Incandescent Light Company was part of the Brush plant so it was included in the takeover. In 1892 Thomson-Houston merged with the Edison companies to form the giant General Electric Company.
United States Electric Lighting CompanyFounded in 1878 by the prolific inventor Hiram Maxim, the United States Electric Lighting soon established itself as Thomas Edison's chief rival in the field of incandescent lighting. The company made some of the earliest installations of this new technology using Maxim's patent on a carbon-filament lamp, which was similar to that invented by Edison in 1879. When Maxim left USEL in 1881 to pursue other lines of invention, the company purchased the Weston Electric Lighting Company in Newark, NJ, and the services of its founder Edward Weston. The inventor of a successful "arc" lighting system, Weston, as works manager and chief designer of USEL, developed a comprehensive arc and incandescent system which the USEL began to market in 1882. In January 1882, Lewis Latimer, an employee of USEL, received a patent for the "Process of Manufacturing Carbons," an improved method for the production of light bulb filaments which yielded longer lasting bulbs than Edison's technique. In 1888, United States Electric Lighting Co. was purchased by Westinghouse Electric Company. Westinghouse Electric Company In 1886, George Westinghouse formed the Westinghouse Electric Company. The main function of the Electric & Manufacturing Company was to develop and produce "apparatus for the generation, transmission and application of alternating current electricity." The company also produced electric railway motors, producing approximately 75,000 by 1905.
Weston Electric Lighting CompanyFounded in New Jersey by Edward Weston in 1880, the company's innovations included the Weston standard cell, the first accurate portable voltmeters and ammeters, the first portable light meter, and many other electrical developments. In 1881, the United States Electric Lighting Company purchased the Weston Electric Lighting Company, and the services of its founder Edward Weston. The inventor of a successful "arc" lighting system, Weston, as works manager and chief designer of USEL, developed a comprehensive arc and incandescent system which the USEL began to market in 1882.
Woodward and Evans Light On July 24, 1874 a Canadian patent was filed for the Woodward and Evans Light by a Toronto medical electrician named Henry Woodward and a colleague Mathew Evans, who was described in the patent as a "Gentleman" but in reality a hotel keeper. They built their lamp with a shaped rod of carbon held between electrodes in a glass globe filled with nitrogen. Woodward and Evans found it impossible to raise financial support for the development of their invention and in 1875 Woodward sold a share of their Canadian patent to Thomas Edison. The Edison Vision The economic effect of electric lighting went far beyond increasing the workday. Profits generated by the electric lamp, in effect, paid for a network of generators and wires. This infrastructure then became available for a whole new class of inventions: appliances and equipment that by the 1930s had transformed the home and the workplace. Edison didn't just invent a light bulb, either. He put together what he knew about electricity with what he knew about gas lights and invented a whole system of electric lighting. This meant light bulbs, electricity generators, wires to get the electricity from the power station to the homes, fixtures (lamps, sockets, switches) for the light bulbs, and more. It was like a big jigsaw puzzle--and Edison made up the pieces as well as fitted them together. He did it his way.  Early beginnings
Man-made electrical lighting itself began in circa 1810 when a chemist in England called Humphrey Davy (who also invented the miner’s safety lamp, known as the Davy lamp) invented the arc light. This worked by connecting a battery (itself invented in 1800 by Italian physicist Count Alessandro Volta, with the word volts being a derivative of his name) to two wires, and attaching the other ends of the wires to a strip of charcoal. The charcoal (which is a form of carbon remember) became electrically charged and began to glow, with arcs of electricity in the air surrounding it.
Then in 1820 Warren De La Rue placed a coil made of platinum into an empty tube and allowed an electric current to pass through to form the first known proto-light bulb. This lit up well enough but the problem was that the chosen material for the coil, platinum was and still is extremely expensive to obtain, making the design a non-starter for commercialization.
Finding the filament
The ideas for filaments (in this case, very fine wires) producing light, was then worked on for years by numerous scientists around the globe. This modern word comes from the Latin ‘filare’ which means ‘to spin’. The theory behind this change of tack in research was developed by James Prescott Joule, an English physicist who stated that if an electric current was passed through a resistant conductor, (the filament), this would itself glow hot with a good amount of the thermal energy produced turning to luminous, or light-giving, energy.
The prize would be great, but so were the problems. The electric lamp had to be first safe, cost-effective, and then practical; as small as possible in size allowing for easy transportation and installation, and it had to light up the surrounding area well, and not burn out after only a short time. This last problem was the main obstacle to significant progress. Many different materials that had a high melting point were used in trials and all in a variety of inert, vacuum, or partial vacuum chambers. This last point was because the oxygen in the air, while vital for life to exist, causes fires to burn at lower temperatures and at faster rates.
 A Swan crosses the line first
The year of 1840 saw the English physicist and chemist Joseph Wilson Swan join the race to produce a workable electric light and twenty years later in 1860 he patented an incandescent lamp with a filament made from carbonized paper in a partial vacuum. This was the world’s first electric light bulb.
But only being an experimental version there were limits to its’ illumination (it was quite dim) and it also could only be used very close to the source of power. The vacuum maintenance was also causing some trouble, so Swan, successful but frustrated, turned to other science projects and only returned to improving his invention in 1875 when he switched the filament to one of compressed and carbonized fibrous cotton thread.
In 1878 he demonstrated his new version. This was a year earlier than Thomas Edison, who had independently chosen the same textile for the filament in his light bulb, after he and his assistants had exhaustively tested 6000 alternative plant fibers from every corner of the Earth, before settling on cotton as the best.
 Edison takes charge, (with some help)
Swan’s improved lamp lit well for thirteen and-a-half hours. Edison did beat this, his lasting for a little under fifteen hours.
Thomas Alva Edison was no ordinary inventor and due to his numerous past successes and fame, had a number of wealthy industrialists providing him with money to back his projects. So he bought Swan’s patent from the company that then owned it (not from Joseph Wilson Swan himself) and the latter passed into the history books (or the better ones, anyway).
Edison now began to rapidly improve the working life span of the light bulb. His further experiments leading to better and better versions until by 1880, his bamboo fiber filament lamp was a 16 watt bulb that lasted for anywhere between 1200-1500 hours.
Though this again was not entirely down to him. A large reason for the long burning filaments was the complete lack of oxygen inside the glass bulb. An inventor called Herman Sprengel had produced a device called a mercury vacuum pump, which was better than anything Swan or Edison himself had yet come up with at evacuating the air from the lamp’s chamber. This at last could allow for the first ‘long life’ light bulbs.
And the design for the bulb itself employed by Edison was not his alone, his had evolved out of a glass concept invented by two Canadians: Henry Woodward and Matthew Evans; but they had been unsuccessful in finding willing backers for their bulb, and having no financial muscle themselves, ended up like Swan, having their rights to patent bought by Thomas Edison, and also like Swan, are hardly known today whilst Edison is regularly hailed as the father of the light bulb.
One should not belittle Edison, mind. He behaved perfectly legally at all times and improved the originals immensely, allowing them to become widespread in use. And although he did not get there first, his original had also been slightly better than the competition.
 Moving on
In the next century 1903 saw Willis Whitnew invent a metal-coating for the carbon filament which avoided the inside of the bulb turning dark with sooty residue. In addition to this, 1906 saw tungsten (still in common use today) making its appearance as the General Electric Company patented a way of producing filaments from this excellent candidate metal. Indeed Edison himself had known tungsten would eventually prove to be the best choice for filaments in incandescent light bulbs, but in his day, the machinery needed to produce the wire in such a fine form was not available. Engineering had come on in leaps and bounds in the intervening years but tungsten filament production was still a costly pastime for business until 1910 when William David Coolidge of General Electric improved the process of manufacture to make the longest lasting tungsten filaments available to all.
So the wonder of electric light bulbs were soon seen in all parts of the world where electricity itself stood proud, and even in some places where it didn’t yet (which must have been unbelievably maddening). Little electric friends that make life so much easier for everyone, and they continued to evolve and adapt to a number of choices of types for different purposes, looks and occasions.
Here are just some of the changes that occurred.
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US$ 29.321 billion (2010)
