1920s

Farnsworth and his "Image Disector"

Televisions really began to take shape during the 1920s with very complex machines being invented that advanced upon everything that had been done in the past. A primary player in this every growing competition between inventors was American inventor Philo. T Farnsworth. In 1927 he was the first to construct a fully functional and complete all-electronic television and present it to the public. All other televisions before had some sort of mechanical aspect, but Farnsworth was able to create a device that relied solely on electricity for its power. His machine was called an “Image Dissector Tube” that incorporated the designs originally proposed but never followed through upon by Alan Campbell-Swinton. The first image transmitted was a simple line, however that was monumental for the time and set a new precedent for future devices.

Baird and his device

In addition to the first all-electronic television, the first moving image was achieved by Scottish inventor John Loagie Baird in 1926. He used mechanical scanning with electronic amplification at both the transmitter and the receiver. (see Campbell-Swinton design) His images were able to be sent by either radio or telephone line, which enable it to be sent over long distances. His technology preceded the first Trans-Atlantic T.V signal transmission in 1928. It was sent from London to New York in February of 1928 and was a historical milestone in television history for it proved that televisions had the ability to unite the world.

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