How Was It Done


To get things done I decided not to

but

and

At first I used a lot of information from the Internet and a set of drawing of the outside of a Curta I from Rick Furr.
A lot of information came from the Curta Disassembly.

When I had the basics in place I mailed Rick Furr the owner of The Calculator Reference a splendid website with a large section on the Curta with a request for some measurements.
View the version I send to Rick
Over the next months I received every measurement I asked for and lots of suggestions too.
Rick measured many of his Curta parts and also sent photographs of all the details.

From then on it was a matter of stepwise refinement

and the result is


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