Stepped Spiral Egg Beater: A Stepped Dasher Spun in a Square Box

A beater spun in a round bowl soon drags the whole mixture round with it. Thomas McBean of Fowlerville, New York, received US 24,134, dated 24 May 1859, for an egg beater: "a double spiral-shaped beater or dasher with its surface formed into steps within a square box," turned horizontally on a vertical shaft by a bevel pinion and a handle, so that the dasher and the square box together "so thoroughly breaks up all portions of the eggs that they may be well and very thoroughly beaten in a few seconds." This rung compares the side and corner gaps, then prints the stepped dasher, builds a square box with a bevel drive, and times beating in the box against a round bowl.