Egg Beater Hecho a Mano: Frota Dos Rodillos Entre las Palmas

Two agitators turning opposite ways had needed a crank and a fixture. David Shive of Philadelphia received US 36,030, dated 29 July 1862, for a muddler or egg beater worked by "a pair of slender cylinders or rolls arranged parallel with each other in a suitable frame": rubbed between the hands, one roll turns the inner agitator and the other, through a pair of pinions, the outer one, opposite ways — "thus dispensing with the cumbrous fixtures and crank heretofore required." This rung works out the turns per rub, then prints the rolls and pinions, builds the frame and agitators, and times a beating.