Something about tube mill models

The first model constructed was of the hot strip pipe mill. It was fully operational and could roll lead bars into strips of lead sheet which were then rolled up in a miniature coiler. That model was followed by a model of the cold strip mill, which also included a miniature but fully working stamping press. After a coil was rolled through the cold strip mill it would be placed on an uncoiler in front of the stamping press, then fed into the press which stamped out souveneir tokens to be given to spectators.
The next model to be constructed was the seamless tube mill. It is by far the most complex of all the models. In it, a length of lead pipe is used to simulate the tube round. A piece of lead foil would be placed over the ends of the pipe to make it appear as if it were solid. Then the round would be fed through the heating furnace and out onto the roller tables. Next the round would be "pierced" and the foil would be pushed out of the way. The pipe would then go to the second piercer, then to a sizing stainless steel tube mill before finally being deposited into a rack at the end of the model. The operation of this model required a certain level of skill as it has over a dozen switches and levers to be manipulated.The last two models to be constructed were of an electric pipe milling machine and a butt weld tube mill. Both of these models also operated creating a miniature product. All five models were transported to various trade shows, conventions and even the Canfield Fair from the mid 1930s until the 1960s. One or more of the models have been displayed at various times in Canada, Texas, California, Cleveland, Columbus, New York and Missouri.
In the late 1950s the electric weld tube model was given to the Franklin Institute, where it may still exist today. The cold strip mill model has disappeared and is presumed to be at the Smithsonian. The seamless, butt weld and hot strip mills wound up being displayed at the Buckeye School until the Boardman office building was constructed. At that time the hot strip mill was displayed in the library of the new headquarters. After YS&T's demise the models wound up in a warehouse in Pittsburgh before being donated to the Ohio Historical Society.