Nancy M. Johnson's invention made Ice cream making, faster and much more easier. It was called the Hand crank Ice-cream maker also called an Ice-cream freezer. It is made up of a bucket and a metal pail,(which is inside the bucket). Crushed ice and rock salt is put in between the bucket. The Ice-cream mixture inside the pail. A handle turns a dasher which is churning the concoction, as it freezes. And if you like to see that what I am saying is true, click on the web site below.
http://www.todayinsci.com/Events/Patent/IceCreamFreezer3254.htm
http://www.todayinsci.com/Events/Patent/IceCreamFreezer3254.htm