Hello!!!

I have recently gotten my hands on one of those old kinds of clippers that you use by hand, but when I tried to use them they got stuck in the hair... I don't know if I should sharpen them (or how to sharpen them). Or if I just should turn the "wheel" that you use for how tight it should be, should it be tight (so it also get a little harder to squeeze), or should it be loser (so it's hardly any resistance...? It's a Sweedish clipper I think, on the bottom it at least says "svenskt fabrikat".

Sorry if I spelled any thing wrong, not a native english speaker....