Zeměměřické a astronomické přístroje používané na území ČR od 16. do konce 20. století
Instruments
Manufacturers
About project
instruments
theodolite
manufacturers
J. & J. Frič
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theodolite – J. & J. Frič
Description
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
Basic data
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
Technical parameters
cross hairs:
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
"