Had no idea they had such. All the ones down south close for the Winter so guess that's the reason I haven't seen one. Did this hang somewhere around the window speakers or pick up at concession stand and plug in somewhere on speaker pole ?
Don't you know if that thing could talk what stories it could tell.LOL
From what I could find out is that they had heaters either mounted on the speaker pole with the speakers or they would hand them out at either the concession stand or ticket booth and from what I understand there was an outlet on certain speaker poles that you could plug it into. Actually visited a drive-in recently that still has the junction boxes for the "Drive-in Theater Manufacturing Company" heaters on the poles. They don't have any of the heaters anymore (I looked when I had a tour of the projection booth) but the boxes are still there. The little box about 1/3 of the way up the pole is the junction box for the heaters. Here is a link to a sales brochure for the heaters that went on those junction boxes that I posted a picture of.
http://www.film-tech.com/warehouse/wareview.php?id=871&category=2 
