Today in 1916, US Patent 1197922 A was issued, an invention of Julian O. Ellinger, for his beer “Barrel.” There’s no Abstract, although in the description it includes these claims:

This invention relates to improvements in barrels or kegs and one of the principal objects of the invention is to provide means for securing a head in a barrel or keg in such manner that said head may be securely held in place when the barrel is subjected to rough usage in handling, and so that the head may be readily removed.