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

theodolite – J. & J. Frič

The manufacturer's name on the device
  • Josef & Jan Frič Praha

Interesting construction features

Information about the use of device

Information about the device condition

  • VÚGTK: S0093
  • Owner: Národní technické muzeum
  • Manufacturer: J. & J. Frič
  • Made: 01.01.1920
  • Length: 250 mm
  • Width: 165 mm
  • Height: 320 mm
  • Weight: 4200 g
  • S/N: 4340

  • cross hairs:
  • NK_004
  • telescope type: revolved
  • tripod connection: tribrach
  • type of clamp: clamp on the axis
  • compensator: no
  • unite: ° ' "
  • the possibility of determining the elevation: yes
  • distance meter type: optical
  • construction of the distance meter: integrated
  • view in the telescope: inverted
  • variable telescope length: yes
  • telescope length with retracted eyepiece: 245 mm
  • telescope length with extended eyepiece: 255 mm
  • telescope diameter: 25 mm
  • minimum telescope focusing distance: 4300 mm
  • telescope magnification: 25
  • type of optical plummet: none
  • compass: attachable
  • compass design: circle
  • compass diameter: 95 mm
  • smallest division of the compass scale: 30'
  • horizontal circle diameter: 140 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'
  • setting the horizontal circle to zero: none
  • vertical circle: yes
  • segment of the vertical circle: no
  • vertical circle diameter: 125 mm
  • main reading scale of the vertical circle: vernier
  • number of reading scales of the vertical circle: 1
  • the smallest segment of the vertical circle: 1'
  • cross level: yes
  • length of the cross level/level parallel with line of collimation: 40 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: 40 mm
  • bubble length of the cross level/level perpendicular with line of collimation: 6 mm
  • leveling vial: yes
  • length of leveling vial: 75 mm
  • bubble length of the leveling vial: 15 mm
  • striding level: no
  • altitude buble: no
  • sensitivity of the striding level or leveling vial: 30 "