description Nancy Johnson Overview
Nancy Johnson was an American inventor best known for patenting a hand-cranked ice cream freezer in 1843. Her design used a rotating dasher inside a container surrounded by ice and salt, allowing cream mixtures to freeze while being stirred. The mechanism became a basic pattern for many household ice cream makers and helped make frozen desserts easier to prepare outside commercial settings.
help Nancy Johnson FAQ
What did Nancy Johnson patent in 1843?
Nancy Johnson patented a hand-cranked ice cream freezer in 1843. The design became an important early pattern for making ice cream at home.
How did Nancy Johnson's ice cream freezer work?
A rotating dasher stirred the cream mixture inside an inner container. That container was surrounded by ice and salt so the mixture could freeze while being stirred.
Was Nancy Johnson's ice cream freezer electric?
No. The design was hand-cranked, so the dasher was turned mechanically by the user rather than by an electric motor.
Why is Nancy Johnson's invention historically important?
Her 1843 design established a basic mechanism for freezing ice cream while continuously stirring it. The rotating dasher and ice-and-salt arrangement influenced later ice cream freezers.
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