Today in 1913, US Patent 1065233 A was issued, an invention of Friedrick Gittinger, for his “Keg-Tapping Device.” There’s no Abstract, although in the description it includes this summary:

My invention relates to devices for tapping kegs and barrels, and has especial reference to devices for tapping kegs of beer, and has for its object’ the provision of an improved construction of tapping devices comprising a bung having an integral web provided with an opening and segment-al slots, rotatable valve members mounted on the two sides of said web and secured together for simultaneous rotation over said segmental slots, and a nozzle member adapted to enter and be locked in engagement with said bung and provided with means for rotating the valve members when moving into locking position.