Today in 1902, US Patent 837608 A was issued, an invention of Manley J. Chaplin, for his “Beer-Tap.” There’s no Abstract, although in the description it includes this summary:

My invention relates to taps for beer-casks, and has for its principal objects to provide a tap having simple and effective means for locking it in place, to provide a tap that will be locked in place by the insertion of the discharge-pipe, to provide means for simultaneously packing the joints around the discharge-pipe and around the bung-hole, and other objects hereinafter more fully appearing.