Our San Francisco condo just completed a renovation of its original 1964 two-car 28-floor Otis elevator, and of course they junked the relay- and thyratron-based UCL controller. I'm an engineer, so I asked for the on-site schematics. I spent a pleasant couple of hours looking them over, being confused by some parts, but impressed by the design overall.

Before I consign them to the recycle bin, I thought I'd check here to see if anyone wants them. There are about 40 C-size prints, but I'll bet there are duplicates. I've attached the title block from one page.