In addition, in 1922, Nathan Dazey patented a removable strainer screen in the screw-cap top of his glass churns.
During the late 1920s, many folks gave up on farming and moved to town in the wake of the Agricultural Depression that persisted through the "Roaring Twenties," and there was a sharp drop in the demand for churns.
Dazey churns are a hot item among collectors, so much so that innumerable replicas are now being made.
The machine we use at the restaurant churns quite quickly so not many are formed, but it was expensive to buy and isn't a small piece of equipment.
They do work okay but take a long time to churn down the mix and they don't always freeze the mix down fully before defrosting, so you have to put the mix into the freezer half-churned to finish freezing and it will go hard forming lots of ice crystals and the ice cream/sorbet will not be smooth.