Today in 1896, US Patent 566898 A was issued, an invention of Alfred E. Peroe, for his “Racking Apparatus for Barreling Beer.” There’s no Abstract, although in the description it includes these claims:

My invention relates to what is termed “racking apparatus” used for barreling beer or fermented liquors under pressure and my improvements upon this class of devices relate to a method of constructing them by which the air or gas escaping from the barrel as replaced by the entering beer or liquor will be conducted from the barrel, so as not to interfere with or impinge upon the entering beer or liquor.