Odhner 7 mechanical calculator

Another calculator! And this one is even more fun than the last. A device that is really made to crank out numbers! This Original Odhner 7 was really dirty when I found it, it didn't work at all. I opened it up, cleaned all gunk out, flushed it with solvents and applied some oil. And now it lives again! A really cool machine, that served past professional number crunchers well.


Some interesting links:

- Odhner serial numbers: http://www.rechenmaschinen-illustrate...
- Operating manual: https://www.jaapsch.net/mechcalc/pdf/...
- More info on Willgodt Theophil Odhner: https://www.tekniskamuseet.se/en/lear...
- Odhner calculator info: https://www.jaapsch.net/mechcalc/odhn...


Chapters:

00:00 Intro
00:06 What's this? 80085?
00:16 Why it's called a pinwheel calculator
00:37 A little bit of history
02:05 Current and past state of this machine
02:47 A tour of the machine: what is what?
04:23 Addition
04:47 Substraction
05:31 Multiplication
06:29 Division
07:45 Outro and shoutout to my kids!