Today in 1915, US Patent 1139007 A was issued, an invention of Randolph L. Wright, assigned to Anheuser-Busch, for his “Barrel Rack.” There’s no Abstract, although in the description it includes this summary:

This invention relates to barrel holders and particularly to a device for supporting barrels, preferably kegs containing nails, in position whereby the said keg may be tilted to discharge the contents thereof wholly or in part without undue effort of the operator, the said invention furthermore including novel means whereby the keg is held in a vertical or upright position by gravity when manipulation thereof ceases.