I believe that in actual fact, Burroughs, after a few
years of
night-and-day work on his mechanical calculator design, including
tossing one finished prototype out a second story window in frustration,
patented the *application* of a hydraulic damper to the actuator crank.
This is an interesting and worthy topic.
Just enter "William Seward Burroughs" into a search engine to
verify what John said. That's the name of both the calculator
inventor and the writer, but the writer seldom used his middle
name, making it a good search string.
John A.