I am helping my 90 year old dad with some projects around his house. It is a two story house and he would like to install a ceiling fan in one downstairs room. What I am unsure about is the electrical box in the celing of the room being strong enough to support the fan. The house is somewhere around 125 to 150 years old but I believe it had an extensive remodeling in the early 1960's. The exterior walls have 4x4 (real 4x4s, not the smaller stuff of today) as studs in the walls. So a lot of the house is really overbuilt. I have removed the light fixture from the center of the celing so I could get a look at the box up in there. I see a threaded center stud with a large cotter pin through it in the center top of the box. I have taken a photo of this.[ATTACH]54867[/ATTACH] I think this does not look like a standard electrical box since it has this large threaded stud extending down from the top of the box but I have never seen something like this before. There is a lot of plaster work covering a lot of the box so the remaining opening is only about three inches across. I can see some sort of plate attached to the lower edge of the box and there were two light machine screws threaded into this lower plate that was holding up the original light fixture. The instructions for the ceiling fan he has says the electrical box should be rated to support 50lbs. Anyine have any ideas? I can also post a larger resolution version of this photo as well. [url]http://i685.photobucket.com/albums/vv215/StevenD57/Pictures_from_others/IMG_1063_zpseyiplsgq.jpg[/url]

any one ever change a light switch with a transmitter and on the other wall a receiver