History of Computers and Computing, Calculating tools, Gadgets, Eduard Hammenstede
Eduard Hammenstede
On March 31st, 1882 Eduard Hammenstede of Cologne, Germany, received German patent No. 20443 on Schnell-Addirmaschine (Quick Adding Machine). The device was a column adder with a large numeral drum and keys, arranged in two rows and as a whole looked very much like the earlier calculating machine of Thomas Hill
The machine of Hammenstede looks like it has a simple and reliable construction, but it never went into production and remained only on paper.
The Schnell-Addirmaschine of Eduard Hammenstede (the patent drawing)
Carl Eduard Hammenstede was a German watchmaker, born in 1845 in Düsseldorf, Preußen, in the family of Heinrich Hammenstede and Anna Christiana Klein. In 1868 he immigrated to Belgium, where he lived for several years, then returned to Germany and settled in Cologne.
NEXT UP…
- Meet Paul Baran – Complete Biography, History, and Inventions
- Tito Gonnella’s Adding Machines – Everything You Need To Know
- The 10 Best Movies About Space
Want to Retire Early? Start Here (Sponsor)
Want retirement to come a few years earlier than you’d planned? Or are you ready to retire now, but want an extra set of eyes on your finances?
Now you can speak with up to 3 financial experts in your area for FREE. By simply clicking here you can begin to match with financial professionals who can help you build your plan to retire early. And the best part? The first conversation with them is free.
Click here to match with up to 3 financial pros who would be excited to help you make financial decisions.
The image featured at the top of this post is ©G-Stock Studio/Shutterstock.com.