Here's an odd piece of darkroom history: The Kodak A2-K Dust And Static Removal Unit. There isn't much information about them available online, but from what I can gather Kodak made a few variations of this unit for professional darkrooms. My model is the standard configuration: a 10-in. tall tower with horse camelhair bristles attached to an air ionizer unit in the base. The ionized air is blown through the tower and film is passed through the gate to remove dust. The unit was designed to eliminate dust on negatives before making enlargements. I was in the market for a film drying cabinet when I came across this and figured it'd be useful for all the film scanning I do. After a quick blast of canned air to clean out the camelhair bristles I could watch the dust fall right off as my negatives passed through the gate.
The other accessory for the A2-K was a camelhair brush that attached to the black terminal seen in the photo above. The tower can accommodate up to 8x10 negatives (a format I don't shoot... yet) but the brush was designed to spot clean film. These machines are pretty rare so I doubt I'll be able to find the brush accessory but I've had great results from the tower alone. I'd like to have the entrance gates on the other side of the unit refinished as they've become pitted over the years and could potentially scratch the film. I don't want to tear it apart without some guidance so this might be a project for another day, but in the meantime I'll appreciate having less dust on my scans to deal with.