Today in 1884, US Patent 298686 A was issued, an invention of Peter Gardner, for his “Faucet For Drawing Beer and Other Liquors.” There’s no Abstract, although in the description it includes this summary:

This invention relates to certain improvements in faucets for beer-kegs and other vessels containing liquids under pressure; and it has for its objects to provide a faucet which may be applied to any vessel or keg, and by means of which the same maybe tapped conveniently without waste of material, as more fully hereinafter specified. These objects I attain by the means illustrated in the accompanying drawings, in which Fig. 1 represents a view partly in longitudinal section and partly in side elevation of my improved faucet, showing the same attached to a beer-keg; and Fig. 2 represents a perspective view of a metallic screw-threaded annulus to be employed in connection with the faucet, in order to adapt it to bushing of different sizes, the interior diameter varying according to the size of faucet used.