Ice cream freezerIn 1848, an early U.S. patent for an ice cream freezer was issued to William G. Young of Baltimore, Md. (U.S. No. 5,601). The first freezer patent was issued to Nancy M Johnson on 9 Sep 1834 (No. 3254), which had a revolving shaft inside with two curved wings to move the cream in the freezer. Young's idea made the freezer itself turn rapidly within the ice-tub as well as the cream inside. A piston-rod had a perforated disk at its end to move the cream. It was designed to be used while both agitating the cream and turning the freezer using the weighted top-mounted handle. The beating both moved the cream into better contact with the cold sides, and the air trapped with its motion serves to make the cream lighter.« |
