Freiberger Mining Survey Suspension Compass (360 degrees)

Description

The mining survey compass is a simple and effective instrument for mine surveying, for measuring position and heights in all situations, for the exploration of caves, for surveying planning as well as rock stratification above and below ground and for staking out of claims and sites.
Mining Suspension Compass Scale diameter 80 mm grad. counter-clockwise 360°(400 gon). Interval, scale value 2° (2 gon). Visual interval 0.1° (0.1 gon) Hook distance 236 mmInitial oscillation time of the magnetic needle = 70 sec. Accuracy of magnetic needle’s direction ± 0.2° (0.2 gon).
Graduated arc: Radius of graduated circle 118 mm. Scale value of circle graduation 0.5° (0.5 gon). Visual reading 0.1° (0.1 gon). Plumb bob string for exact readings
Protractor Plate: Length of the edge 240 mm. Interval scale value of the length 1 mm. Visual reading 0.1 mm. Dimensions 243 x 130 mm
String role: Length of string 50 m