Between 1955 and 1957, a television program named "Science Fiction Theater" aired on television.
The program always started with a shot of a "scientific laboratory". The first piece of equipment that is displayed appears to be some sort of receiver. It features a rotating blade and a box that displays some sort of X-Y oscilloscope graph. http://www.youtube.com/watch?v=g_0VcQZrJGg
Would anyone know what the apparatus is?
I've watched the series a hundred times but never knew just what this scientific device is!