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

levelling instrument – J. & J. Frič

The manufacturer's name on the device
  • Jos. & Jan Frič

Interesting construction features

Information about the use of device

Information about the device condition

  • VÚGTK: S0020
  • Owner: Národní technické muzeum
  • Manufacturer: J. & J. Frič
  • Made: 01.01.1895
  • Length: 106 mm
  • Width: 106 mm
  • Height: 152 mm
  • Weight: 1400 g
  • S/N: 

  • cross hairs:
  • NK_001
  • telescope type: non-removable
  • tripod connection: tribrach
  • type of clamp: peripheral clamp
  • compensator: no
  • unite: ° ' "
  • elevation screw: yes
  • view in the telescope: inverted
  • variable telescope length: yes
  • telescope length with retracted eyepiece: 241 mm
  • telescope length with extended eyepiece: 261 mm
  • telescope diameter: 32 mm
  • minimum telescope focusing distance: 3600 mm
  • telescope magnification: 16.6
  • horizontal circle: yes
  • horizontal circle diameter: 89 mm
  • main reading scale of the horizontal circle: vernier
  • number of reading scales of the horizontal circle: 1
  • the smallest segment of the horizontal circle: 1'
  • segment of the vertical circle: no
  • cross level: yes
  • length of the cross level/level parallel with line of collimation: 47 mm
  • bubble length of the cross level/level parallel with line of collimation: 7 mm
  • length of the cross level/level perpendicular with line of collimation: 47 mm
  • bubble length of the cross level/level perpendicular with line of collimation: 7 mm
  • leveling vial: yes
  • length of leveling vial: 93 mm
  • bubble length of the leveling vial: 24 mm
  • striding level: no
  • sensitivity of the striding level or leveling vial: 30 "
  • designed for work: basic work