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Links to other sites for the ANITA and Sumlock enthusiast

Roland Huisman has a considerable ANITA resource at http://technischmuseum.nl. There he describes his restoration of an ANITA Mk 8 to working order at http://technischmuseum.nl/devices/Anita%20MK8/Anita%20MK8.html, with much very interesting information about the working of this machine. Note that this article is in Dutch but can be translated using https://translate.google.com/.
He has posted a valuable selection of ANITA instruction manuals, advertising brochures, electronic schematics together with other interesting literature, at http://technischmuseum.nl/documentation/documentation%20files/Anita%20PDF/.
Roland has also uploaded a video to the YouTube site of the ANITA Mk8 operating. This is very informative since the machine has the cover open and Roland explains what is happening internally. See the video at https://www.youtube.com/watch?v=6-qvtiqWens.
Roland has continued with his YouTube videos with a fascinating demonstration of the internal workings of his restored ANITA Mk12 at https://www.youtube.com/watch?v=dKAyLnBjS3Q&feature=youtu.be. This is recommended viewing to see how this machine which is intermediate between tube and transistor technology worked.

There are excellent photographs and descriptions of the Plus Adder mechanism at John Wolff's Web Museum site at http://www.johnwolff.id.au/calculators/Tech/Plus/Plus.htm.

Simon Southwell has produced fascinating simulations of some of the ANITA calculators at www.anita-simulators.org.uk. Pop one up and have a go, but don't forget to switch on first.
Simon also recalls visiting the Portsmouth factory as a boy on a Saturday in 1972 with his father, David Southwell, who was the Test Manager. Read his fascinating account at http://www.anita-simulators.org.uk/calc/article1.htm.

Jaap Scherphuis has an interesting website with information about mechanical calculators at http://www.jaapsch.net/mechcalc/index.htm. There is a section on Bell Punch models at http://www.jaapsch.net/mechcalc/bellpunch.htm, including sales brochures and a very unusual adding mechanism with unknown use.

The Vintage Calculators Web Museum is the parent site of this one and has descriptions of many mechanical and early electronic calculators, calculator articles, and a calculator photo library.

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