Today in 1974, US Patent 3789622 A was issued, an invention of Ralph Yanes, for his “Ice Box For Beer Barrel.” Here’s the Abstract:
An insulated barrel shape structure for housing and suspending a beer barrel in the horizontal position surrounded by ice. The rear circular cover of the device is removable for the installation and replacement of the beer barrel and surrounding ice. The circular front cover bears a circular opening for the spigot of the beer barrel. The structure provides for an air-seal between the sides and bottom of the housed beer barrel and the iced refrigerated area of the structure.