Today in 1885, US Patent 326017 A was issued, an invention of John A. Button, for his “Beer-Drawing Apparatus.” There’s no Abstract, although in the description it includes this summary:

My invention relates to that class of devices by means of which beer or other analogous liquids are drawn direct from the barrel, my object being to so improve-such apparatus that the liquid drawn shall be delivered under a uniform pressure and free from all sediment or impurities. It is also my purpose to so improve the pressure-chamber that the gas which collects therein may be automatically disposed of.

And here’s the original drawing filed with the application: