Phonovision, 1920s Video Disc is a photograph by Sheila Terry which was uploaded on May 10th, 2013.
Phonovision, 1920s Video Disc
Phonovision, 1920s video disc, coloured photograph. This is a standard 78 rpm (revolutions per minute) gramophone disc, used by the Scottish engineer... more
by Sheila Terry
Title
Phonovision, 1920s Video Disc
Artist
Sheila Terry
Medium
Photograph
Description
Phonovision, 1920s video disc, coloured photograph. This is a standard 78 rpm (revolutions per minute) gramophone disc, used by the Scottish engineer John Logie Baird (1888-1946) to record the output from his television system. The principle is the same as a gramophone, with an electromagnetic needle used instead to detect and convert the indentations on the disc back into light and sound on a television screen. Baird was granted a patent on his Phonovision system in 1928, but the image quality was poor compared to cinemas. Original photograph published in Television (Dinsdale, 1928).
Uploaded
May 10th, 2013
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