"Movie screen in the parlor need no longer be a problem with this new device known as the Pict-O-Screen. Concealed within the frame of a lithograph print, it can be pulled into place with a cord whenever your projector is ready. When the show is over, just tug the cord again and the screen disappears. It’s made by Radiant Mfg. Co., Chicago."
Mechanix Illustrated
March 1947