Today in 1937, US Patent 2085186 A was issued, an invention of Otto H. Eger, for his “Beverage Cooling System.” There’s no Abstract, although in the description it includes this summary:

This invention relates to cooling, and, more particularly, to a method of and apparatus for cooling beverages.

The general object of the invention is to provide an improved method of and apparatus for coolinga fiuid or beverage, particularly beer.

Another object of the invention is to use a cooling fiuid for cooling beer passing from a keg to a spigot, the cooling fluid then being used to cool bottles, cans or the like, positioned in a suitable receptacle.

A feature of the invention resides in cooling a cooling medium, passing the cooling medium through a jacket in heat exchange relation with the line through which beer is passed from a keg to a spigot, and then passing the cooling medium through a receptacle adapted to receive bottles or the like, and repeating the cycle.

Another feature of the invention resides in controlling the cooling of the cooling medium, responsive to variations in heat load on the system.