Today in 1945, US Patent 2371028 A was issued, an invention of Andrew F. Christ, for his “Liquid Dispensing Device.” There’s no Abstract, although in the description it includes this summary:

My invention relates to dispensing devices and more particularly to faucets for dispensing, draught beer or the like. The object of my invention is to produce a device that will dispense raw draught beer without the usual foam caused by carbonation and permitting the deposit of a .pre determined quantity of foam into the container onto the top of the raw beer.

Another object of my invention is to produce a device of the character described, that employs the customary attaching means to; the barrel or keg acting as-a container or supply reservoir for the beer, and permitting any conventional type of tapping mechanism.