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

tachymetre – J. & J. Frič

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

Interesting construction features

Information about the use of device

Information about the device condition

  • VÚGTK: S0053
  • Owner: Národní technické muzeum
  • Manufacturer: J. & J. Frič
  • Made: 01.01.1933
  • Length: 258 mm
  • Width: 165 mm
  • Height: 327 mm
  • Weight: 6400 g
  • S/N: 5819

  • cross hairs:
  • NK_004
  • telescope type: flip over
  • tripod connection: tribrach
  • type of clamp: peripheral clamp
  • compensator: no
  • unite: ° ' "
  • distance meter type: optical
  • construction of the distance meter: integrated
  • autoreduction of the length: no
  • view in the telescope: inverted
  • variable telescope length: no
  • telescope length with retracted eyepiece: 255 mm
  • telescope diameter: 45 mm
  • minimum telescope focusing distance: 4800 mm
  • telescope magnification: 25
  • type of optical plummet: none
  • compass: none
  • horizontal circle diameter: 150 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: 20"
  • setting the horizontal circle to zero: circle clamp
  • 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: 2
  • the smallest segment of the vertical circle: 20"
  • cross level: yes
  • length of the cross level/level parallel with line of collimation: 70 mm
  • bubble length of the cross level/level parallel with line of collimation: 17 mm
  • length of the cross level/level perpendicular with line of collimation: 70 mm
  • altitude buble: no
  • leveling vial: yes
  • length of leveling vial: 85 mm
  • bubble length of the leveling vial: 25 mm
  • striding level: no
  • sensitivity of the striding level or leveling vial: 20 "
  • sensitivity of the alidade level: 60" "
  • designed for work: basic work