Today in 1938, US Patent 2124565 A was issued, an invention of Frank D. Goll and James K. Wareham, assigned to the Aluminum Co. Of America, for their “Liquid Container,” essentially a keg. There’s no Abstract, although in the description it includes these claims:

This invention relates to metal vessels for storing and shipping liquids. It relates especially to the construction of metal barrels and similar vessels for the storage and transportation of liquids, such as beer and the like.

The primary object of the invention is to provide an improved metal barrel. Another object is to provide a strong but light metal barrel which may be used either with or without an insulating cover of rubber or other material. A further object of this invention is to provide improved fittings for metal barrels of the type specified.