Bellows-and-Float Atmospheric Churn: Blasts of Air Through a Water-Jointed Pipe, a Float Gathers the Butter

Patrick S. Devlan of Reading, Pennsylvania, received US 24,382, dated 14 June 1859, for a churn worked by blasts of air only. A bellows under the body, worked by a lever, blows up a pipe that opens inside a wider tube; the air goes down between them and out through a perforated disk across the bottom, so it is spread through the whole cream. The cream standing in the tube makes a water joint, so no valves are needed. A perforated float with projections rides up and down on the bubbling cream and gathers the butter as it forms. This rung builds it with a 20-litre bucket on legs and a bellows below.