This is probably one of the most useless contraptions I've ever designed and built, but from a technical standpoint, it's quite epic.
It essentially rearranges 4 iron blocks placed in a straight line into a T-posed structure required for a iron golem to spawn. In addition to this function, the factory has an option to automate the process by creating a new iron golem every 4 minutes; That is, if you provide it with enough iron (4 iron blocks per 4 minutes).
Please watch the video if you need help with operating the device :D