Gentlemen:
I have recently been in touch with a fellow by the name of Jack Christensen, who is the preeminent repair person for the Curta calculator in the US. He describes his activity as a hobby that has gone out of control... sound familiar? He may be singularly responsible for keeping these wonderful machines alive.
The Curta calculator looks like a pepper grinder, and is a marvel of mechanical engineering and design. It was last manufactured in the late 60's, and was sold commercially as late as 1972 when electronic calculators finally killed their sales. Vintage car rally participants use them, as they are allowed by their rules.
I have taken a fancy to these devices, and have offered to help Jack re-create some of the critical parts that have been breaking, and are unavailable for repair.
We are going to be making these critical parts to look as close to the original as possible, but to be much stronger using modern materials and methods. The replacement parts will be designed in 3D in SolidWorks and stress analysis will be done using a package called COSMOS. I would be happy to share the details.
Do you know anyone that may have a Curta, working or broken, that they are willing to part with?
Please spread the word and let me know.
I can be reached at snipped-for-privacy@yahoo.com.
Thank you,
Spencer Pelham, NH