Today in 1912, US Patent 1033730 A was issued, an invention of William G. Peacock, assigned to the Perfection Bottle Stopper Company, for his “Self-Sealing Bottle-Stopper.” There’s no Abstract, although in the description it includes this summary:

In bottle or other receptacle stoppers of that kind embracing a hollow elastic bulb that constitutes the sealing portion of the stopper which is arranged to be longitudinal y stretched to thereby reduce its diameter when it is inserted into the bottle neck and to thereafter resume its. normal length and diameter to automatically adjust itself to the bottle neck to seal the bottle.

Among the objects of the invention is to simplify and cheapen bottle stoppers of this character and to arrange the parts thereof to be readily assembled.

A further object of the invention is to produce a simple and efficient combined stopper and bottle cap remover.