Zeměměřické a astronomické přístroje používané na území ČR od 16. do konce 20. století

tachymetre – Kern

The manufacturer's name on the device
  • Kern & Co Aarau-Schweiz

Interesting construction features

Information about the use of device

Information about the device condition

  • VÚGTK: S0106
  • Owner: Národní technické muzeum
  • Manufacturer: Kern
  • Made: 01.01.1900
  • Length: 265 mm
  • Width: 175 mm
  • Height: 365 mm
  • Weight: 5440 g
  • S/N: 20117

  • cross hairs:
  • NK_001
  • telescope type: special
  • tripod connection: tribrach
  • type of clamp: clamp on the axis
  • compensator: no
  • unite: gon
  • distance meter type: mechanical
  • construction of the distance meter: integrated
  • autoreduction of the length: no
  • view in the telescope: inverted
  • variable telescope length: yes
  • telescope length with retracted eyepiece: 260 mm
  • telescope length with extended eyepiece: 288 mm
  • telescope diameter: 30 mm
  • minimum telescope focusing distance: 3950 mm
  • telescope magnification: 25
  • type of optical plummet: none
  • compass: none
  • horizontal circle diameter: 140 mm
  • main reading scale of the horizontal circle: vernier
  • number of reading scales of the horizontal circle: 2
  • the smallest segment of the horizontal circle: 1'
  • setting the horizontal circle to zero: repeating
  • vertical circle: no
  • segment of the vertical circle: no
  • main reading scale of the vertical circle: vernier
  • number of reading scales of the vertical circle: 1
  • the smallest segment of the vertical circle: 0,5
  • cross level: yes
  • length of the cross level/level parallel with line of collimation: 84 mm
  • bubble length of the cross level/level parallel with line of collimation: 15 mm
  • length of the cross level/level perpendicular with line of collimation: 98 mm
  • bubble length of the cross level/level perpendicular with line of collimation: 23 mm
  • altitude buble: no
  • leveling vial: no
  • striding level: yes
  • bubble length of the striding level: 120 mm
  • sensitivity of the alidade level: 20 "
  • designed for work: basic work