Antique Cast Iron Fireplace Insert
I recently bought my first home, a beautifully restored Victorian built c. 1909, and in the formal sitting room there is a fireplace with a cast iron insert. I was wondering how this sort of fireplace is used.
Some details: Across the inside back it has in raised letters, "The Monarch." There is a key on the outside at the upper right that, when turned, closes a... flue? Damper? I'm not sure of the terminology here. Below that is a lever that seems as though it should be able to be pushed in and pulled out, but it's stuck and I don't know what it controls.
There are two grates in the lower front of the fireplace that can be opened and closed (like vents). The fireplace itself doesn't really have a floor; it opens down into the basement where, at the base of the chimney there are two cast iron doors that can be opened to, I suppose, clear out the ashes.
If anybody can give me any details about how this all works, I would sincerely appreciate it!
Here is a link that might be useful: