Weird Patent of the Day
Trick windmill novelty
An amusement trick device for playing a practical joke on an unsuspecting person. A can has a freely rotatable windmill wheel mounted above it; a hidden inner tube is directed against the windmill blades so they turn, while an outer tube conceals that first end.
Source: United States Patent and Trademark Office, www.uspto.gov. Official PDF: USPTO patent PDF. Also at Google Patents. The drawing on this page is a reduced copy of the official figure; see the original drawing.
