HP Calculator Keys' Tactile Feedback

[piper]

Is there somewhere I can find out all about the 'old' key switches that have that great tactile feedback (is it a rocker switch or something)?

I did a web search as well as a search of this HP Museum forum but didn't find anything about how they actually work.

Regards,

Paul

My HPs: 11c (my current calculator; have bought 3 of them), 41cv (it disappeared somewhere along the way), 28s (old and busted), 67 (also MIA)

[AndiGer]

Have you seen this?
http://www.keesvandersanden.nl/calculato...s_with.pdf

There is more HP patents related material on Kees' homepage:
http://www.keesvandersanden.nl/calculators/patents.php

Andi

[piper]

Excellent, thank you!

[EugeneNine]

I'm wondering if 3d printers have gotten the resolution small enough to where we could print individual keys like the older calculators. There are some now that can do multiple colors.