Our Armstrong Interlock Machine is from Morgan Tower, located in Quincy Ohio.

It was used to control the crossing of the Detroit, Toledo and Ironton with the New York Central system. When the tower closed, the machine was purchased for scrap by George Detwiler whoe donated it to us for display.

It still works today, and we have it wired to a section of our layout that is modeled after the track design it represents.

Here is a video of it in operation during its last days in service (July 1986)