Today in 1934, US Patent 1959501 A was issued, an invention of Elton F. Ross, for his “Beer Dispensing Device.” There’s no Abstract, though it’s described this way in the application:

This invention relates to a device for dispensing beer and other carbonated liquids discharged under pressure from a keg or other source of supply, and particularly to a dispensing device designed to supply measured quantities of the liquid and to control the discharge so as to prevent waste of the liquid and other objections due to wildness of the liquid.