That is an interesting depiction with two weapons.
that wierd contraption/machine in the middle
That's part of the decorative illumination. It's not meant to be a machine or anything. Just pretty designs that go around and between the text. If you look at a lot of the Mediaeval manuscripts you'll see people, animals, buildings, etc. in among the decorations. Some are pretty cool.
The scribes stick wierd stuff in the books. Some funny (a woman with a spinning spindle on the end of a long stick jousting a knight), some political commentary (the pope's head on a baboon), and some rare complaints (bad light, sore fingers, hairy vellum). That work was so greuling that scribes jokingly invented not a patron saint but a patron devil. I've done enough calligraphy in my life I have a small idea of what they went through.