Today’s invention is a low-efficiency ceiling fan (they all are).
This takes the form of a number of belts which each form an ‘L’ shape and which are driven by a small motor within the central fixture. As the main body of the fan rotates, at varying speed about its vertical axis, so the belts will be flung outwards to a lesser or greater extent, creating different circulation patterns within the room.
The circulation of the individual belts preserves their life and, being coated with a somewhat sticky material, allows them to catch flies as they rotate. These would be scraped off into a small tank within the fan’s hub and the belts could be easily removed for washing.