Today in 1903, US Patent 732122 A was issued, an invention of Adolph Schneider, for his “Barrel Tap.” There’s no Abstract, although in the description it includes this summary:

The invention relates, primarily, to barrel taps more, particularly intended for use in drawing or transferring effervescing liquid, such as beer, from one receptacle to another, but which can also be used for drafting liquids.

The objects of the invention are to construct a barrel-tap which can be readily applied to or removed from a receptacle without any great inconvenience or trouble and which when applied to a receptacle will enable the liquid contained in the receptacle to be drawn therefrom without liability of waste, to effectually pr I’ll; leakage in applying the tap to the receptacle, to enable air or other fluid pressure to be applied to the receptacle as the liquid is withdrawn therefrom without change in the tap, thereby maintaining the requisite amount of pressure in a receptacle for properly transferring the liquid under a predetermined pressure, to simplify the construction and improve the operation of barrel-taps, and to construct a barrel-tap which as a Whole will be very compact, easily applied, and effective and reliable in use.