Zeměměřické a astronomické přístroje používané na území ČR od 16. do konce 20. století
Instruments
Manufacturers
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instruments
levelling instrument
manufacturers
J. & J. Frič
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levelling instrument – J. & J. Frič
Description
The manufacturer's name on the device
Josef & Jan Frič
Interesting construction features
Information about the use of device
Information about the device condition
Basic data
VÚGTK:
S0023
Owner:
Národní technické muzeum
Manufacturer:
J. & J. Frič
Made:
01.01.1890
Length:
84
mm
Width:
106
mm
Height:
170
mm
Weight:
1090
g
S/N:
3775
Technical parameters
cross hairs:
telescope type:
non-removable
tripod connection:
pin with 4 horizontal screws
type of clamp:
clamp on the axis
compensator:
no
unite:
° ' "
elevation screw:
yes
view in the telescope:
inverted
variable telescope length:
yes
telescope length with retracted eyepiece:
192
mm
telescope length with extended eyepiece:
211
mm
telescope diameter:
30
mm
minimum telescope focusing distance:
2780
mm
telescope magnification:
11
horizontal circle:
yes
horizontal circle diameter:
75
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:
no
leveling vial:
yes
length of leveling vial:
103
mm
bubble length of the leveling vial:
20
mm
striding level:
no
sensitivity of the striding level or leveling vial:
36
"
designed for work:
basic work