Thomas Edison
Thomas Alva Edison (
February 11 1847 –
October 18 1931) was an
American inventor and
businessman who developed many devices which greatly influenced
life in the 20th century. Dubbed "The Wizard of Menlo Park" by a newspaper reporter, he was one of the first inventors to apply the principles of
mass production to the process of invention, and can therefore be credited with the creation of the first industrial research laboratory. Some of the inventions credited to him were not completely original, but improvements of earlier inventions, or were actually created by his numerous employees working under his direction. Nevertheless, Edison is considered one of the most prolific inventors in history, holding
1,097 U.S.
patents in his name, as well as many patents in the
United Kingdom,
France, and
Germany.
Thomas Edison was born in
Milan, Ohio, to Samuel Ogden Edison, Jr. and Nancy Matthews Elliott (1810–1871). Thomas was their seventh child, and had a late start in his schooling due to an illness. His mind often wandered and his teacher Reverend Engle was overheard calling him "addled". This ended Edison's three months of formal schooling. His mother had been a school teacher in Canada and happily took over the job of schooling her son. She encouraged and taught him to read and experiment. He recalled later, "My mother was the making of me. She was so true, so sure of me; and I felt I had something to live for, someone I must not disappoint."
Many of his lessons came from reading R.G. Parker's
School of natural philosophy. Edison went almost completely deaf at the age of twelve. There are many theories of what caused this; according to Edison he went deaf because he was pulled up to a train car by his ears.
Thomas's life in
Port Huron,
Michigan was bittersweet. He sold candy and newspapers on trains running from Port Huron to Detroit. Partially
deaf since adolescence, he became a
telegraph operator after he saved
Jimmie Mackenzie from being struck by a runaway train. Jimmie's father, station agent J.U. Mackenzie of
Mount Clemens, Michigan, was so grateful that he took Edison under his wing and trained him as a telegraph operator. Edison's deafness aided him as it blocked out noises and prevented Edison from hearing the telegrapher sitting next to him. One of his mentors during those early years was a fellow telegrapher and inventor named
Franklin Leonard Pope, who allowed the then impoverished youth to live and work in the basement of his
Elizabeth,
New Jersey home.
Some of his earliest inventions related to electrical telegraphy, including a
stock ticker. Edison applied for his first patent, the electric vote recorder, on
October 28,
1868.
On
December 25 1871, he married the then 16 year old
Mary Stilwell whom he had met two months earlier. They had three children, Marion Estelle Edison (known as Dot), Thomas Alva Edison, Jr. (known as Dash) and William Leslie Edison. Mary Edison died on
9 August 1884.
In the 1880s, Thomas Edison bought property in
Fort Myers,
Florida, and built
Seminole Lodge as a winter retreat.
Henry Ford, the automobile magnate, later lived a few hundred feet away from Edison at his winter retreat,
The Mangoes. Edison even contributed technology to the automobile. They were friends until Edison died. On
February 24 1886, when he was thirty-nine, he married 19 year old
Mina Miller in
Akron,
Ohio. They also had three children:
Madeleine Edison,
Charles Edison (who took over the company upon his father's death and who later was elected
Governor of
New Jersey) and Theodore Edison.
Thomas Edison began his career as an inventor in Newark, New Jersey, with the automatic repeater and other improved
telegraphic devices, but the invention which first gained him fame was the
phonograph in 1877. This accomplishment was so unexpected by the public at large as to appear almost magical. Edison became known as "The Wizard of Menlo Park, New Jersey", where he lived. His first phonograph recorded on tinfoil cylinders that had low sound quality and destroyed the track during replay so that one could listen only a few times. In the 1880s, a redesigned model using wax-coated cardboard cylinders was produced by
Alexander Graham Bell, Chichester Bell, and Charles Tainter. This was one reason that Thomas Edison continued work on his own "Perfected Phonograph".
Thomas Edison was a
freethinker, and was most likely a
deist, claiming he did not believe in "the God of the theologians", but did not doubt that "there is a Supreme Intelligence". However, he rejected the idea of the supernatural, along with such ideas as the soul, immortality, and a personal God. "Nature", he said, "is not merciful and loving, but wholly merciless, indifferent."
|
Thomas Edison's first light bulb used to demonstrate his invention at Menlo Park. |
|
Edison's Menlo Park Laboratory, removed to Greenfield Village in Dearborn, MI. (Note the organ against the back wall) |
Edison's major innovation was the first industrial research lab, which was built in
Menlo Park, New Jersey. It was the first institution set up with the specific purpose of producing constant technological innovation and improvement. Edison was legally attributed with most of the inventions produced there, though many employees carried out research and development work under his direction.
William Joseph Hammer, a consulting
electrical engineer, began his duties as a laboratory assistant to Edison in December 1879. He assisted in experiments on the
telephone,
phonograph,
electric railway,
iron ore separator,
electric lighting, and other developing inventions. However, Hammer worked primarily on the incandescent electric lamp and was put in charge of tests and records on that device. In 1880 he was appointed Chief Engineer of the Edison Lamp Works. In his first year, the plant under general manager
Francis Robbins Upton turned out 50,000 lamps. According to Edison, Hammer was "a pioneer of incandescent electric lighting."
Most of Edison's patents were utility patents, which during Edison's lifetime protected for a 17 year period inventions or processes that are electrical, mechanical, or chemical in nature. About a dozen were design patents, which protect an ornamental design for a 14 year period. Like most inventions, his were not typically completely original, but improvements to prior art. The phonograph patent, on the other hand, was unprecedented as the first device to record and reproduce sounds. Edison did not invent the first
electric light bulb, but instead invented the first commercially practical incandescent light. Several designs had already been developed by earlier inventors including the patent he purchased from
Henry Woodward and
Mathew Evans,
Moses G. Farmer,
,
James Bowman Lindsay, William Sawyer,
Humphry Davy, and
Heinrich Göbel. They all had such flaws as extremely short life, high expense to produce, and high current draw, making them little more than laboratory curiosities. In 1878, Edison applied the term
filament to the
element of glowing wire carrying the current, although English inventor
Joseph Swan had used the term prior to this. Edison took the features of these earlier designs and set his workers to the task of creating longer-lasting bulbs. By 1879, he had produced a new concept: a high resistance lamp in a very high vacuum, which would burn for hundreds of hours. While the earlier inventors had produced electric lighting in
laboratory conditions dating back to a demonstration of a glowing wire by
Alessandro Volta in 1800, Edison concentrated on commercial application and was able to sell the concept to homes and businesses by mass-producing relatively long-lasting light bulbs and creating a complete system for the generation and distribution of
electricity.
The Menlo Park research lab was made possible by the sale of the quadruplex telegraph that Edison invented in 1874, which could send four simultaneous telegraph signals over the same wire. When Edison asked
Western Union to make an offer, he was shocked at the unexpectedly large amount that Western Union offered; the patent rights were sold for $10,000. The quadruplex telegraph was Edison's first big financial success.
Incandescent era
|
U.S. Patent #223898 Electric Lamp |
In 1878, Edison formed the
Edison Electric Light Company in New York City with several financiers, including
J. P. Morgan and the
Vanderbilt families. Edison made the first public demonstration of the
incandescent light bulb on December 31, 1879, in Menlo Park. On
January 27 1880, he filed a patent in the United States for the electric incandescent lamp; it was during this time that he said, "We will make electricity so cheap that only the rich will burn
candles."
On
October 8 1883, the U.S. patent office ruled that Edison's patent was based on the work of
William Sawyer and was therefore invalid. Litigation continued for nearly six years, until
October 6 1889, when a judge ruled that Edison's electric light improvement claim for "a filament of carbon of high resistance" was valid. To avoid a possible court battle with
Joseph Swan, he and Swan formed a joint company called Ediswan to market the invention in Britain.
Other designs for a light bulb included
Serbian inventor
Nikola Tesla's idea of utilizing
radio frequency waves emitted (in the
Tesla effect) from the side electrode plates to light a
wireless bulb. He also developed plans to light a bulb with only one wire with the energy refocused back into the center of the bulb by the glass envelope with a center "button" to emit an incandescent glow. Edison's design won out during this time, although Tesla did go on to invent
fluorescent lighting.
Edison patented an
electric distribution system in 1880, which was critical to capitalize on the invention of the electric lamp. The first investor-owned electric utility was the 1882
Pearl Street Station,
New York City. On
September 4,
1882, Edison switched on the world's first electrical power distribution system, providing 110
volts
direct current (DC) to 59 customers in lower
Manhattan, around his
Pearl Street generating station. On
January 19 1883, the first standardized incandescent electric lighting system employing overhead wires began service in
Roselle,
New Jersey.
Carbon telephone transmitter
In 1877 and 1878 Edison invented and developed the carbon microphone used in all telephones along with the Bell receiver until the 1980s. After protracted patent litigation, a federal court ruled in 1892 that Edison and not
Emile Berliner was the inventor of the carbon microphone. (Josephson, p146). The carbon microphone was also used in radio broadcasting and public address work through the 1920s.
War of currents
|
Extravagant displays of electric lights quickly became a feature of public events, as this picture from the 1897 Tennessee Centennial Exposition shows. |
George Westinghouse and Edison became adversaries due to Edison's promotion of
direct current (DC) for electric power distribution over the more easily transmitted
alternating current (AC) system developed by
Nikola Tesla and sold by Westinghouse. Unlike DC, AC could be stepped up to very high voltages with
transformers, sent over thinner wires, and stepped down again at the destination for
distribution to users.
Despite Edison's contempt for capital punishment, the war against AC led Edison to become involved in the development and promotion of the
electric chair as a demonstration of AC's greater lethal potential versus the "safer" DC. Edison went on to carry out a brief but intense campaign to ban the use of AC or to limit the allowable voltage for safety purposes. As part of this campaign, Edison publicly electrocuted dogs, cats, and in one case, an elephant
to demonstrate the dangers of AC. Tesla's AC replaced DC in many instances of generation and power distribution, enormously extending the range and improving the safety and efficiency of power distribution. Though widespread use of DC ultimately lost favor for distribution, it exists today primarily in long-distance
high-voltage direct current (HVDC) transmission systems. Had modern HVDC technology been available to Edison, there is
speculation that the War of the Currents would have ended differently.
Work relations
Frank J. Sprague, a competent mathematician and former
naval officer, was recruited by
Edward H. Johnson, and joined the Edison organization in 1883. One of Sprague's significant contributions to the Edison Laboratory at
Menlo Park was to expand Edison's mathematical methods. (Despite the common belief that Edison did not use mathematics, analysis of his
notebooks reveal that he was an astute user of mathematical analysis, for example, determining the critical parameters of his electric lighting system including lamp resistance by a sophisticated analysis of
Ohm's Law,
Joule's Law and
economics.) A key to Edison's success was a
holistic rather than
reductionist approach to
invention, making extensive use of
trial and error when no suitable theory existed. (See
Edisonian approach). Since Sprague joined Edison in 1883 and Edison's output of patents
peaked in 1880 it could be interpreted that the shift towards a reductionist analytical approach may not have been a positive move for Edison. Sprague's important analytical contributions, including correcting Edison's system of mains and feeders for central station distribution, form a counter argument to this. In 1884, Sprague decided his interests in the exploitation of electricity lay elsewhere, and he left Edison to found the
Sprague Electric Railway & Motor Company. However, Sprague, who later developed many electrical innovations, always credited Edison for their work together.
Another of Edison's assistants was
Nikola Tesla who claimed that Edison promised him $50,000 if he succeeded in making improvements to his DC generation plants. Several months later, when he had finished the work and asked to be paid, Tesla claimed that Edison said, "When you become a full-fledged American you will appreciate an American joke"
. Tesla immediately resigned. This anecdote is somewhat doubtful, since at Tesla's salary of $18 per week the bonus would have amounted to over 53 years pay, and the amount was equal to the initial capital of the company. Tesla resigned when he was refused a raise to $25 per week (Jonnes, p110). Although Tesla accepted an
Edison Medal later in life and professed a high opinion of Edison as an inventor and engineer, he remained bitter. The day after Edison died the
New York Times contained extensive coverage of Edison's life, with the only negative opinion coming from Tesla who was quoted as saying, "He had no hobby, cared for no sort of amusement of any kind and lived in utter disregard of the most elementary rules of hygiene" and that, "His method was inefficient in the extreme, for an immense ground had to be covered to get anything at all unless blind chance intervened and, at first, I was almost a sorry witness of his doings, knowing that just a little theory and calculation would have saved him 90 per cent of the labor. But he had a veritable contempt for book learning and mathematical knowledge, trusting himself entirely to his inventor's instinct and practical American sense." When Edison was a very old man and close to death, he said, in looking back, that the biggest mistake he had made was that he never respected Tesla or his work.
[Tesla says Edison was an empiricist. 1931. New York Times, October 19 1931, p.25.]Media inventions
The key to Edison's fortunes was telegraphy. With knowledge gained from years of working as a telegraph operator, he learned the basics of electricity. This allowed him to make his early fortune with the
stock ticker, the first electricity-based broadcast system. Edison patented the sound recording and reproducing
phonograph (or gramophone in British English) in 1878. Edison also holds the patent for the
motion picture camera. In 1891, Thomas Edison built a
Kinetoscope, or peep-hole viewer. This device was installed in penny arcades, where people could watch short, simple films.
On
August 9 1892, Edison received a patent for a two-way
telegraph. In April 1896,
Thomas Armat's
Vitascope, manufactured by the Edison factory and marketed in Edison's name, was used to project
motion pictures in public screenings in New York City. Later he exhibited motion pictures with voice soundtrack on cylinder recordings, mechanically synchronized with the film. In 1908 Edison started the
Motion Picture Patents Company, which was a conglomerate of nine major film studios (commonly known as the Edison Trust). Thomas Edison was the first honorary fellow of the
Acoustical Society of America, which was founded in 1929.
Edison became the owner of his
Milan, Ohio, birthplace in 1906, and, on his last visit, in 1923, he was shocked to find his old home still lit by lamps and candles. Influenced by a fad diet that was popular in the day, in his last few years "he consumed nothing more than a pint of milk every three hours".
He believed this diet would restore his health.
Thomas Edison was active in business right up to the end. Just months before his death in 1931, the Lackawanna Railroad implemented electric trains in suburban service from Hoboken to Gladstone, Montclair and Dover in New Jersey. Transmission was by means of an overhead catenary system, with the entire project under the guidance of Thomas Edison. To the surprise of many, Thomas Edison was at the throttle of the very first MU (Multiple-Unit) train to depart Lackawanna Terminal in Hoboken, driving the train all the way to Dover. As another tribute to his lasting legacy, the very same fleet of cars Thomas Edison deployed on the Lackawanna in 1931 served commuters until their retirement in 1984. A special plaque commemorating the joint achievement of both the railway and Edison, can be seen today in the waiting room of Lackawanna Terminal in Hoboken, presently operated by New Jersey Transit.
Edison purchased a home known as "Glenmont" in 1886 as a wedding gift for Mina in Llewellyn Park in West Orange, New Jersey. The remains of Thomas and Mina Edison are now buried there. The 13.5 acre (55,000 m²) property is maintained by the
National Park Service as the
Edison National Historic Site. Thomas Edison died on
October 18,
1931, in New Jersey at the age of eighty-four. His final words to his wife were "It is very beautiful over there."
Mina died in 1947. Thomas Edison's last breath is purportedly contained in a test tube at the
Henry Ford Museum. Ford reportedly convinced Charles Edison to seal a test tube of air in the inventor's room shortly after his death, as a memento. A plaster death mask was also made.
Although in his early years Edison worked alone, he built up a research and development team to a considerable number while at his Menlo Park research laboratory. This large research group, which included engineers and other workers, often based their research on work done by others before them, as is true of all research and development. Some have claimed that when his staff succeeded, he presented the inventions as his own and got the credit for them as they were patented in his name. His staff generally carried out his directions in conducting research, and when he was absent from the lab, the pace of work slowed greatly. Other inventors had attempted to create an
incandescent light bulb before Edison, but he is often credited as its inventor, even though a number of employees also worked on the device under his direction. His was the first
incandescent light bulb with high resistance, a small radiating area, and a commercially useful lifetime. Other critics have claimed that he put obstacles in the way of his competitors, and used other methods which were ethically questionable, even if their technology was superior to what was created by his own workers.
As a famous inventor, many tributes have been made to Thomas Edison. Several places and objects have been named after the inventor, including the town of
Edison, New Jersey, and
Thomas Edison State College, a nationally-known college for adult learners in
Trenton, New Jersey. There is a
Thomas Alva Edison Memorial Tower and Museum in the town of Edison. In the
Netherlands, major music awards are named after him. The City Hotel, in
Sunbury,
Pennsylvania, was the first building to be lit with Edison's three-wire system. The hotel was renamed
The Hotel Edison, and retains that name today. The "Incredible Machines: Contraptions" game series has an alligator with the name Edison (with other animals given the names of other scientists).
The
United States Navy named the
USS Edison, a
Gleaves class destroyer, in his honor in 1940. The ship was decommissioned a few months after the end of
World War II. In 1962, the Navy commissioned
USS Thomas A. Edison, a fleet ballistic missile nuclear-powered submarine. Decommissioned on
1 December 1983, Thomas A. Edison was stricken from the
Naval Vessel Register on
April 30,
1986. She went through the Navy's
Nuclear Powered Ship and Submarine Recycling Program at
Bremerton,
Washington, beginning on
1 October 1996. When she finished the program on
December 1,
1997, she ceased to exist as a complete ship and was listed as scrapped.
The
Edison Medal was created on
February 11,
1904, by a group of Edison's friends and associates. Four years later the
American Institute of Electrical Engineers (AIEE), later
IEEE, entered into an agreement with the group to present the medal as its highest award. The first medal was presented in 1909 to
Elihu Thomson, and was surprisingly awarded to
Nikola Tesla in 1917. The
Edison Medal is the oldest award in the area of
electrical and electronics engineering, and is presented annually "for a career of meritorious achievement in electrical science, electrical engineering or the electrical arts."
Several landmarks exist in honor of Edison. The
Port Huron Museums, in
Port Huron,
Michigan, restored the original depot that Thomas Edison worked out of as a young
newsbutcher. The depot has appropriately been named the
Thomas Edison Depot Museum. The town has many Edison historical landmarks including the gravesites of Edison's parents.
In
Detroit, the Edison Memorial Fountain in Grand Circus Park was created to honor his achievements. The limestone fountain was dedicated
October 21,
1929.
Life magazine (USA), in a special double issue, placed Edison first in the list of the "100 Most Important People in the Last 1000 Years", noting that his
light bulb "lit up the world". He was ranked thirty-fifth on
Michael H. Hart's
list of the most influential figures in history. In 1940, his life was documented on the screen when
Spencer Tracy starred as Edison in "Edison The Man." He has been called the fifteenth
Greatest American.
In recognition of the enormous contribution inventors make to the nation and the world, the Congress, pursuant to Senate Joint Resolution 140 (Public Law 97 - 198), has designated
February 11, the anniversary of the birth of Thomas Alva Edison, as
National Inventor's Day.
In 1879,
Auguste Villiers de l'Isle-Adam wrote the book "L'Ève Future" (translated into English as "Tomorrow's Eve"), about a fictional Thomas Edison who creates the ideal (artificial) woman.
Companies bearing Edison's name
* Edison General Electric, now
General Electric*
Commonwealth Edison, now part of
Exelon*
Consolidated Edison*
Edison International**
Southern California Edison**
Edison Mission Energy**
Edison Capital*
Detroit Edison, a unit of
DTE Energy*
Edison Sault Electric Company, a unit of
Wisconsin Energy*
FirstEnergy**
Metropolitan Edison**
Ohio Edison**
Toledo Edison*
Edison S.p.A., a unit of
Italenergia*
Boston Edison, a unit of
NSTAR
* Ernst Angel:
Edison. Sein Leben und Erfinden. Berlin: Ernst Angel Verlag, 1926.
* Mark Essig:
Edison & the Electric Chair: A Story of Light and Death. New York: Walker & Company, 2003. ISBN 0802714064
*Jill Jonnes,
Empires of Light: Edison, Tesla, Westinghouse, and the Race to Electrify the World. New York: Random House, 2003. ISBN 0-375-50739-6
*
List of Edison patents*
List of people on stamps of Ireland*
USS Edison (DD-439)*
Free ebook of Thomas Edison at
Project Gutenberg*
Biography, Pictures, and Sounds*
Edison cylinder recordings, from the
Cylinder Preservation and Digitization Project at the
University of California, Santa Barbara Library.
*
4-disc DVD set containing over 140 films produced by the Thomas Edison Company.
*
Complete list of 1,093 patents.
* See Thomas Edison's
patent application for the light bulb at the National Archives.
; Biography
*"A Streak of Luck," by Robert Conot, Seaview Books, New York, 1979, ISBN 0-87223-521-1
*"Edison" by Matthew Josephson. McGraw Hill, New York, 1959, ISBN 07-033046-8
*
Free ebook of Edison, His Life and Inventions by Frank Lewis Dyer and Thomas Commerford Martin' at
Project Gutenberg*"
Edison, His Life And Inventions" by Frank Lewis Dyer
at Worldwideschool.org
*"Thomas Edison", by Gerry Beales
.
*"Thomas Alva Edison" by John Patrick Michael Murphy.
*
A short Thomas Edison biography*"Working at Inventing: Thomas A. Edison and the Menlo Park Experience," edited by William S. Pretzer, Henry Ford Museum & Greenfield Village, Dearborn, Michigan, 1989, ISBN 00-933728-33-6 (cloth) ISBN 00-933728-34-4 (paper)
; Historic sites
*
Edison Birthplace Museum*
Thomas Edison House*
Thomas Edison Winter Estate*
Edison National Historic Site*
Menlo Park*"Menlo Park Reminiscences, Volume 1," by Francis Jehl, originally published by Edison Institute, Dearborn, Michigan, 1937. Reprinted by Dover Publications, Mineola, NY, 1990. ISBN 0-486-26357-6
*
Edison Depot Museum*
Edison exhibit and Menlo Park Laboratory at Henry Ford Museum; Archives
*
Rutgers: Edison Papers*
Rutgers: Edison Patents*
Edisonian Museum Antique Electrics*
Thomas A. Edison in his laboratory in New Jersey, 1901*"
Edison's Miracle of Light"
American Experience,
PBS.
*
William J. Hammer collection — c. 1874–1935, 1955–1957. Archives Center, National Museum of American History, Smithsonian Institution.
zh-yue:愛迪ç"Ÿ
