I don't know the name of this door. You pull a chain and it activates and opens the gate. They are in tons of dungeons.

I can't find it since I don't know the name.

But I want to add 4 of these in my nordic tomb.

I want two of them to only have the pull chain on one side of the door. obviously so the person in my dungeon will have to take a different way, but can exit easier.

this is what I am talking about. a smaller version though.

[img]http://www.rarityguide.com/articles/content_images/1/skyrim/undersaarthpillarpuzzlesolu.jpg[/img]

I believe you are looking for the norportcullis01 door. check out this link to get it working with pull chains.
http://www.youtube.com/watch?v=PN5vCtlxvwk&feature=youtu.be&hd=1