Telephone
In
the 1870s, two inventors Elisha Gray
and Alexander Graham Bell both independently designed devices that could
transmit speech electrically (the telephone). Both men rushed their respective
designs to the patent office within hours of each other, Alexander Graham Bell
patented his
telephone first. Elisha Gray and Alexander Graham Bell entered into a famous
legal battle over the invention of the telephone, which Bell won.
Wireless Telegraph
Samuel Finley Breese Morse,
inventor of several improvements to the telegraph, was born in Charlestown,
Mass. on April 27, 1791.
As a student at Yale College, Morse became interested in both painting and in
the developing subject of electricity. After his graduation in 1810, he first
concentrated on painting, which he studied in England. He would later become a
well-known portrait artist.
After moving to
New York in 1825, he became a founder and the first president of the National
Academy of Design. He also ran for office, but was defeated in both his
campaigns to become New York mayor. Meanwhile, Morse maintained a steady
interest in invention, taking out three patents for pumps in 1817 with his
brother Sidney Edwards Morse. It wasn't until 1832 that he first became
interested in telegraphy.
That year,
Morse was traveling to the United States from Europe on a ship, when he
overheard a conversation about electromagnetism that inspired his idea for an
electric telegraph. Though he had little training in electricity, he realized
that pulses of electrical current could convey information over wires. The
telegraph, a device first proposed in 1753 and first built in 1774, was an
impractical machine up until that point, requiring 26 separate wires, one for
each letter of the alphabet. Around that time two German engineers had invented
a five-wire model, but Morse wanted to be the first to reduce the number of
wires to one.
Between 1832
and 1837 he developed a working model of an electric telegraph, using crude
materials such as a home-made battery and old clock-work gears. He also acquired
two partners to help him develop his telegraph: Leonard Gale, a professor of
science at New York University, and Alfred Vail, who made available his
mechanical skills and his family's New Jersey iron works to help construct
better telegraph models.
Morse's first
telegraph device, unveiled in 1837, did use a one-wire system, which produced an
EKG-like line on tickertape. The dips in the line had to be de-coded into
letters and numbers using a dictionary composed by Morse, this assuming that the
pen or pencil wrote clearly, which did not always happen. By the following year
he had developed an improved system, having created a dot-and-dash code that
used different numbers to represent the letters of the English alphabet and the
ten digits.
Photography and Moving Pictures
Over
the years, photography has developed into an art form as well as a medium of
expression and communication. Society would be different without any pictures,
such as television and movies. The invention of photography came about, because
of the need of rendering perspective correctly.
Photography is
the art or process of producing images on a sensitized surface by the action of
radiant energy and light. The name "Photography" comes from Sir John Herschel
who first used the term in 1839 when the photographic process became public. It
is derived from the Greek words for light and writing.
The idea of a
way to keep images permanent was not a new one. A prediction was made by de la
Roche (1729-1774) in a book called Giphantie. The tale said it was possible to
capture images from nature, on a canvas which had been coated with a sticky
substance. This surface would provide a mirror image that would become permanent
after it had been dried in the dark. Only several years after de la Roche's
death, the invention of the photograph came into existance.
Photography is
not a natural phenomenon; it has its basis in science, and thus, had to be
invented. Photography has no single inventor, it evolved over hundreds of years.
Experimenters were working on the same problem unaware of each other's work. A
small discovery would be made by one man; years later another man would build
upon it. This continued until the pieces of information finally fit together and
became the camera.
Phonograph &
Other Recording Devices
On December
4, 1877 Thomas Alva Edison became the first person to ever record and play back
the human voice.
Although
the phonograph was an original invention, it did not rise out of a vacuum It was
the son of a marriage between the telephone and the telegraph. These
technologies provided both the need for the phonograph and the means by which to
produce it.
The technology
to produce the phonograph was also provided by a combination of the telephone
and the telegraph. Early in 1877 Edison and his staff were working with both the
telephone and the telegraph. For the telephone Edison was experimenting with how
a diaphragm could change a voice into an electrical signal. At the same time he
was working on the telegraph repeater. This Edison invention used a stylus
(basically a needle) to indent paper with the dots and dashes from a telegraph
signal.
Printing
Basically,
printing is the process of making multiple copies of a document by the use of
movable characters or letters. The process was developed independently in China
and Europe. Before the invention of printing, multiple copies of a manuscript
had to be made by hand, a laborious task that could take many years. Printing
made it possible to produce more copies in a few weeks than formerly could have
been produced in a lifetime by hand.
Invented by
Johann Gutenberg in c1450, the printing press made the mass publication and
circulation of literature possible. Derived from the presses farmers used to
make olive oil, the first printing press used a heavy screw to force a printing
block against the paper below.
An operator
worked a lever to increase and decrease the pressure of the block against the
paper. The invention of the printing press, in turn, set off a social revolution
that is still in progress. The German printing pioneer Johannes Gutenberg solved
the problem of molding movable type. Once developed, printing spread rapidly and
began to replace hand-printed texts for a wider audience.
Thus,
intellectual life soon was no longer the exclusive domain of church and court,
and literacy became a necessity of urban existence. The printing press stoked
intellectual fires at the end of the Middle Ages, helping usher in an era of
enlightenment. This great cultural rebirth was inspired by widespread access to
and appreciation for classical art and literature, and these translated into a
renewed passion for artistic expression. Without the development of the printing
press, the Renaissance may never have happened. Without inexpensive printing to
make books available to a large portion of society, the son of John Shakespeare,
a minor government official in rural England in the mid-1500s, may never have
been inspired to write what are now recognized as some of history's greatest
plays. What civilization gained from Gutenberg's invention is incalculable.
Gutenberg's
name does not appear on any of his work but he is generally accredited with the
world's first book printed with movable type, the 42-line (the number of lines
per page) Bible, also known as the Gutenberg Bible or the Mainz Bible (for the
place where it was produced).
Radio
Marconi
(1874-1937) was born in Italy and studied at the University of Bologna. He was
fascinated by Heinrich Hertz's earlier discovery of radio waves and realised
that it can be used for sending and receiving telegraph messages, referring to
it as "wireless telegraphs."
Marconi's first
radio transmissions, in 1896, were coded signals that were transmitted only
about 1,6 km (a mile) far. Marconi realised that it held huge potential. He
offered the invention to the Italian government but they turned it down. He
moved to England, took out a patent, and experimented further. In 1898 Marconi
flashed the results of the Kingstown Regatta to the offices of a Dublin
newspaper, thus making a sports event the first "public" broadcast. The next
year Marconi opened the first radio factory in Chelmsford, Essex and established
a radio link between Britain and France. A link with the USA was established in
1901. In 1909 Marconi shared the Nobel prize in physics for his wireless
telegraph. Marconi became a wealthy man.
Signals only
But Marconi's wireless telegraph transmitted only signals. Voice over the air,
as we know radio today, came only in 1921. Marconi went on to introduce short
wave transmission in 1922.
Marconi was not
the first to invent the radio, however. Four years before Marconi started
experimenting with wireless telegraph, Nikoli Tesla, a Croatian who moved to the
USA in 1884, invented the theoretical model for radio. Tesla tried unsuccessful
to obtain a court injunction against Marconi in 1915. In 1943 the US Supreme
Court reviewed the decision. Tesla became acknowledged as the inventor of the
radio - even though he did not build a working radio.
Television
Probably no
other invention in history has been so hotly disputed as the prestigious claim
to the invention of 'Tele-vision or 'long-distance sight' by wireless.”
On December 2, 1922, in Sorbonne, France, Edwin Belin, an Englishman, who held
the patent for the
transmission
of photographs by wire as well as fiber optics and radar, demonstrated a
mechanical scanning device that was an early precursor to modern television.
Belin’s machine took flashes of light and directed them at a selenium element
connected to an electronic device that produced sound waves. These sound waves
could be received in another location and remodulated into flashes of light on a
mirror.
Up until this point, the concept behind television was established, but it
wasn’t until electronic scanning of imagery (the breaking up of images into tiny
points of light for transmission over radio waves), was invented, that modern
television received its start. But here is where the controversy really heats
up.
The credit as to who was the inventor of modern television really comes down to
two different people in two different places both working on the same problem at
about the same time: Vladimir Kosma Zworykin, a Russian-born American inventor
working for Westinghouse, and Philo Taylor Farnsworth, a privately backed farm
boy from the state of Utah. Zworykin is usually credited as being the father
of modern television.