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
  • PRAGUE JOS. & JAN FRIČ

Interesting construction features

Information about the use of device

Information about the device condition

  • VÚGTK: S0104
  • Owner: Národní technické muzeum
  • Manufacturer: J. & J. Frič
  • Made: 01.01.1895
  • Length: 225 mm
  • Width: 125 mm
  • Height: 175 mm
  • Weight: 1410 g
  • S/N: 417

  • telescope type: non-removable
  • tripod connection: special
  • type of clamp: peripheral clamp
  • compensator: no
  • unite: ° ' "
  • distance meter type: optical
  • construction of the distance meter: integrated
  • view in the telescope: inverted
  • variable telescope length: yes
  • telescope length with retracted eyepiece: 223 mm
  • telescope length with extended eyepiece: 260 mm
  • telescope diameter: 17 mm
  • minimum telescope focusing distance: 1430 mm
  • telescope magnification: 22
  • type of optical plummet: none
  • compass: none
  • horizontal circle diameter: 110 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: no
  • segment of the vertical circle: yes
  • segment's range of vertical circle: 100
  • vertical circle diameter: 100 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: no
  • altitude buble: no
  • leveling vial: yes
  • length of leveling vial: 87 mm
  • bubble length of the leveling vial: 22 mm
  • striding level: no
  • sensitivity of the striding level or leveling vial: 25 "
  • designed for work: low precise work