It's a real interesting topic this one- it's the Cleveland Fed door that's had me baffled, the fact they spin that massive capstan handle for what seems ages- and fast as well, you see the guy putting his hand against it (bad idea?) as a friction brake.

All that shouts worm gearing to me, as I can't see how spur or planetary gearing would have enough difference on the ratios to allow that many revolutions and that much speed. The problem with worm gearing though, is the offsetting that wylk mentioned. Not easy to cram all of those types into the housing drum since the offsetting takes up a lot of space and bearing in mind the actual bearings and supports would need to be massive. I can't remember what the One King West door is like- I'm assuming it's lack of capstan handles on the hand wheel possibly means it's turned slower and for less revolutions?

On the One King West door, one thing that will determine if the 2 pressure bars are separate is they will rotate in opposite ways. If it's a single bar straight through the housing driven by a single crown and pinion gear then it'll turn it one way. If the pressure bars are individual and each is driven by its own gear on opposing sides of the drive gear, then the left bar will rotate in the opposite direction to the right. Not an easy thing to determine from even the clearest of videos though, I think you'd need to be there and try it! My guess is crown and pinion bevel gearing on the One King West door, but the Cleveland Fed I'd love to know. Doug, what's your chances of pulling the front cover off the drive housing lol