Television Discoveries

One of the most popular inventions of 21st century has been surrounded by controversies. Television, which has become an indispensible part of our lives, is a result of several discoveries. Early development stages of television witnessed various inventors employing combination of electronic, optical and mechanical technologies for capturing, transferring and broadcasting visual images.

Towards the end of 1800s, images were transferred through fax machine for the first time. Soon after telephone came into being, electrically powered transmission of moving TV images, known as telephonoscope, was started. Science fiction writers were of the view that light would pass via wires like sound some day. And many people have worked hard to offer this exquisite instrument of entertainment.

Television has now become one of most important sources for entertainment for a lot of us. It works as a rejuvenator, companion and entertainer each day. Starting from black and whites, Television has transformed completely. 3D TV is latest edition to world of entertainment. It takes the viewer to a new world where landscapes seem realistic. This technology creates an illusion of viewing TV not just from a single angle but various angles. Equipped with infrared emitters, 3D technology TVs are offering exclusive experience to the users.

Not only in terms of viewing experience, TV has progressed in terms of looks and features too. A plethora of features are offered by latest LED TVs. Great audio and video clarity adds to the delight of viewers. The best part about these televisions is that they consume much less energy as compared to the conventional ones. Savings in electricity bills have persuaded people to invest in these televisions. Ultra thin and sleek look of this TV allows the users to adorn in any corner of the place.

Source : www.engineersgarage.com/invention-stories/history-of-television-tv

An Introduction To Inventors

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.

The telegraph and telephone are both wire-based electrical systems, and Alexander Graham Bell's success with the telephone came as a direct result of his attempts to improve the telegraph.When Bell began experimenting with electrical signals, the telegraph had been an established means of communication for some 30 years. Although a highly successful system, the telegraph, with its dot-and-dash Morse code, was basically limited to receiving and sending one message at a time.

Bell's extensive knowledge of the nature of sound and his understanding of music enabled him to conjecture the possibility of transmitting multiple messages over the same wire at the same time. Although the idea of a multiple telegraph had been in existence for some time, Bell offered his own musical or harmonic approach as a possible practical solution. His "harmonic telegraph" was based on the principle that several notes could be sent simultaneously along the same wire if the notes or signals differed in pitch.

Bell's unceasing scientific curiosity led to invention of the photophone, to significant commercial improvements in Thomas Edison's phonograph, and to development of his own flying machine just six years after the Wright Brothers launched their plane at Kitty Hawk. As President James Garfield lay dying of an assassin's bullet in 1881, Bell hurriedly invented a metal detector in an unsuccessful attempt to locate the fatal slug.

Source : inventors.about.com/od/bstartinventors/a/telephone.htm