The T.V. has become something that the majority of people cannot live without. Around 1908, an English inventor by the name of A. A. Campbell-Swinton conceived the idea for an electrical method of scanning, or collecting an image. Although it was not until around the 1930's, that cathode rays or electron beams were developed by an American electrical engineer by the name of Allen B. DuMont. This is essentially the same type of system used in TV's today.
WHAT MAKES TELEVISION
Television is the transmission and reception of moving images by use of electrical signals. When a television is hooked up to an amplifier, an electrical gun or a scanner, it will pass a beam across the cells which in turn causes the image to appear on the screen. Although here recently solid-state semiconductors have replaced this pick-up tube, called charge-coupled devices. When a broadcasting company broadcast a signal of a TV program, an antenna will receive that signal.
T.V. TIMELINE
| 1925 | John Baird made his very first television transmission. He demonstrated this at the Selfridges Department Store on March 25, 1925. |
| 1926 | John Baird started on making a 30-line TV system that could produce up to five frames per second. |
| 1927 | Philo T. Farnsworth applied for a patient on his image dissector tube that used cesium to reproduce images. Cesium is an element that is soft as wax. Nine months later he transmitted his first successful television image in San Francisco. |
| 1928 | By the end of this year, over 15 stations was licensed to broadcast for TV. |
| 1936 | The Berlin Olympics was broadcast on TV, this was the first national broadcast ever. |
| 1954 | COLOR TV was authorized by the FCC in the United States. |