Today in 1985, US 4542683 A was issued, an invention of Noel R. Wilkinson, for his “Brewing Apparatus.” Here’s the Abstract:

Brewing apparatus and a method of brewing in which mash cooking and wort boiling are carried out in a single vessel (2), the vessel having an agitator (202), a heater preferably formed as a steam jacket (220, 224) and as an external through flow heater (8), the wort being circulated through the heater and back into the vessel by means of a tangential feed inlet (56) which causes the vessel’s contents to whirl while the wort is boiling. The apparatus and method reduces the requirement for separate mash cooking and wort boiling vessels.