Restoring Baird's Image - Donald F. McLean - Google Books

https://books.google.de/books?id=1ISFkhG6cZQC&pg=PA172#v=onepage

In the late 1920s, John Logie Baird - considered to be the inventor of television - was experimenting with 'phonovision' in which he attempted to record television signals onto gramophone discs. His efforts were mostly unsuccessful and this technology…