Screw-Tube Egg Beater: The Tube Spins, the Rod Stands Still

A push-spinning egg beater turns on its point in the bowl: it wanders, and pressing on it slows it. Walter Hart of Philadelphia received US 31,663, dated 12 March 1861, for an egg beater whose wire beaters are on a tube with a screw thread, spun by a nut slid up and down; inside it a rod fixed to the handle ends in a button that rests on the bottom of the vessel, so "the base ... is stationary and therefore has no tendency to slip" and the pressure is borne by the rod, leaving the tube free to turn. This rung works out the tube's turns per stroke, then prints the lobed screw tube and nut, fits rod, button and beaters, and times a beating.