Today in 1912, US Patent 1015585 A was issued, an invention of George D. Prentice, for his “Keg Rinser.” There’s no Abstract, although in the description it includes this summary:

My invention relates to improvements in machines for rinsing kegs, and it pertains to that class which are adapted to be used with water under pressure.

The object of my invent-ion is to provide a machine by which a water controlling valve is automatically opened by the gravity of the keg to be rinsed, and the water supply is used for the two fold purpose of rinsing the kegs and removing them from the machine, whereby the operator has simply to place a”keg upon the machine when a water controlling valve will be automatically opened and the keg will be rinsed and automatically removed, whereby the manual labor of cleansing kegs is reduced to the minimum.