There are books concering the mechanical interlocking type "Einheit" from the 1920's, when this type of interlocking was introduced. For older technologies i don't know books with detailled descripton. But - as there are a lot of interlockings of the different originally german types in P...
First of all I would like to apologize for using English instead of German. Unfortunately I don't feel fluent enough in your language to speak on technical topics. My name is Piotr Szajko and I am a student at the Technical University in Wrocław. I am writing my engineer diploma on topic: "Hist...