Hanging gear
The hanging equipment (also "Schinzeug") is the (historical) tool of the mark separator (mining surveyor), and was used to measure a mine building according to position and height in space (underground: underground).
Components
- Lot with string
- Degree arc
- Hanging compass
- Laughing chain or measuring tape
handling
By stretching a cord in the course of a cleat , this was defined in terms of direction and position (inclination).
The hanging compass hung on the string and the degree arc indicated values for direction and inclination. The laughing chain as a measure of length was a tool for measuring the length of a "train". The cord was attached to the roof of the tunnel on special nails , which ensured a defined position of the cord (ridge nails).
In individual cases, graphic recordings were made with a measuring table and tilting rule .
Leveling was carried out with a hose level , which is still used in mining today (especially when there is no line of sight between heights to be leveled; however, a line of sight is a prerequisite for the use of a level .)
Some geological compasses have hooks that make them suitable as a hanging compass.
Usage today
Although the historical hanging device hardly plays a role in mining today, it is often used by cave explorers (partly in self-made form) to measure caves . The laughing chain has been replaced by the measuring tape.
Although the tools are built very simply, amazing accuracy can be achieved.