Curvimeter
The curvimeter (also Kurveometer , Kurvometer , curve knife or card knife ) is a measuring device for measuring distance in cards . It is one of the rectifying instruments and is mostly used by hikers or cyclists to determine the planned or covered route. With the attached roller wheel, you can drive down curvy stretches on the map (hence the name curvimeter).
species
Depending on the model, a distinction is made between mechanical and electronic curvimeters.
Mechanical curvimeter
In the case of mechanical devices, the rotation of the measuring wheel is transmitted mechanically to a pointer. This shows the distance traveled on a scale. When reading the distance, you have to choose the right scale for the map scale. R. Wittmann constructed the first such device in Vienna in 1875, the idea going back to Hermann von Schlagintweit . Newer devices can be reset to zero with a push button.
Electronic curvimeter
In electronic devices, the rotation of the measuring wheel is digitally processed. The scale of the map can be set from the start. In addition, a pocket calculator , a compass and a flashlight are often built in.
See also
Individual evidence
- ^ Otto Lueger : Lexicon of the entire technology and its auxiliary sciences . 2nd Edition. Deutsche Verlagsanstalt, Stuttgart and Leipzig 1920 ( zeno.org [accessed on August 7, 2019] Lexicon entry "Curve Meter").
- ^ Brockhaus' Kleines Konversations-Lexikon . 11th edition. FA Brockhaus, Leipzig 1911 ( zeno.org [accessed on August 7, 2019] lexicon entry "curve meter").
- ^ Otto Lueger : Lexicon of the entire technology and its auxiliary sciences . 2nd Edition. Deutsche Verlagsanstalt, Stuttgart and Leipzig 1920 ( zeno.org [accessed on August 7, 2019] Lexicon entry “Rectifying instruments”).
- ^ Meyer's Large Conversational Lexicon . 6th edition. Bibliographisches Institut, Leipzig / Vienna 1909 ( zeno.org [accessed on August 7, 2019] Lexicon entry "Curve Meter" with a picture of the first device).
- ↑ Pierer's Universal Lexicon of the Past and Present . 4th edition. Verlagbuchhandlung von HA Pierer , Altenburg 1865 ( zeno.org [accessed on August 7, 2018] encyclopedia entry "Wegmesser").
