I don't know if this was a stoker furnace, but my Mom tells me about when she was little living on the farm (in the 50's), her Dad had a big coal furnace installed to heat the whole house. She remembers there were lots of ducts and automated contraptions with chains to open and close them. When her Mom would turn the heat up she'd go down to the basement to watch all that stuff work.
She said she remembers seeing a heart shape on the stove and on the grates as if that was part of their logo. I can't remember if she remembered the mfgr name but I'll try to ask her next time I see her.