record number: | 9 |
instrument type: | theodolite |
manufacturer: | Starke & Kammerer Wien |
serial number: | 9954 |
weight: | 5.30 kg |
dimensions (l/w/h): | 26/22/29 cm |
year of manufacture: | 1890 |
centering and leveling the instrument: |
plumb bob
two perpendicular toric levels on the alidade precise reversible level – levelling toric level |
The theodolite was made around 1890. A reversible levelling toric level attached to the telescope allows precise levelling – the instrument was originally called “level-theodolite”. All three models of theodolites made by Starke & Kammerer at the turn of the century are described in an interesting way in the Encyclopaedia of Railway Engineering. This theodolite model is the simplest of the three. It is typical of the most numerous theodolites of the time in terms of functionality and precision, and has all the classic accessories for setting up and determining measurement values, including the already closed horizontal circle.
At the beginning of the 20th century, this theodolite model was known as the preferred measuring instrument of civil engineers. According to data from the Land Cadastre Archive, the instrument was used in Slovenia for cadastre maintenance until the 1960s. Later, it was used for teaching students. The instrument was completely restored in 2016.
horizontal circle | vertical circle | |
---|---|---|
diameter: | protected, closed, 15 cm | open, 10 cm |
type of division: | engraved division | engraved division |
limb implementation: | silvered metal bracket | silvered metal bracket |
division: | sexagesimal/sexadecimal | sexagesimal/sexadecimal |
unit: | 20' | 20' |
Reading | ||
number of reading points: | 2 | 1 (in nadir) |
reading device: | vernier | vernier |
number of units: | 20 | 20 |
graduation unit: | 1' | 1' |
repetition: | / | / |
Telescope | ||
diameter of objective: | 30 mm | |
magnification: | 17 x | |
type: | Ramsden's retractable eyepiece | |
cross hairs/reticule: | Reichenbach's crosshairs, constant 100 |