GB351669A - Improvements in or relating to geodetic base-line measuring devices - Google Patents

Improvements in or relating to geodetic base-line measuring devices

Info

Publication number
GB351669A
GB351669A GB1471430A GB1471430A GB351669A GB 351669 A GB351669 A GB 351669A GB 1471430 A GB1471430 A GB 1471430A GB 1471430 A GB1471430 A GB 1471430A GB 351669 A GB351669 A GB 351669A
Authority
GB
United Kingdom
Prior art keywords
wire
parts
hinged
line measuring
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1471430A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EDUARD HEINRICH SIDLER
HENRY WILD SURVEYING INSTR SUP
Original Assignee
EDUARD HEINRICH SIDLER
HENRY WILD SURVEYING INSTR SUP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EDUARD HEINRICH SIDLER, HENRY WILD SURVEYING INSTR SUP filed Critical EDUARD HEINRICH SIDLER
Priority to GB1471430A priority Critical patent/GB351669A/en
Publication of GB351669A publication Critical patent/GB351669A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/02—Means for marking measuring points
    • G01C15/06—Surveyors' staffs; Movable markers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Portable Outdoor Equipment (AREA)

Abstract

351,669. Measures of length. WILD SURVEYING INSTRUMENTS SUPPLY CO., Ltd., H. and SIDLER, E. H., Heerbrugg, Switzerland. May 13, 1930, No. 14714. [Class 106 (ii).] Comprises a geodic base-line measuring device with a sighting telescope, wherein the parts 6, 7 which are hinged together, are formed as hollow bodies within each of which is stretched a wire 14 carrying a mark and formed of Invar metal so that the distance between the marks is unaffected by temperature changes and may be adjusted accurately by displacement of the wires. The parts which are formed by tubes 6, 7 of semicircular cross section are hinged to swing around a pin 3. The hinge parts are formed with abutments 4, 5 which engage when the parts are opened out, a locking device, not shown, securing them in this position. Adjacent the free end each tube carries a housing 9 within which is a plate 10 carrying a triangular mark the plate being fixed to a member 12 mounted to slide in a slot 13 in the tube. A wire 14 of Invar metal is secured at one end to the member 12 and at the other end is disposed in an adjusting screw 15 in the hinge part. Two nuts 17, 18 are screwed on the end of the wire the inner nut bearing against the end 16 of the adjusting screw 15. A spring 19 at the other end keeps the wire taut. A telescope 21 is hinged to a pin and folds down between the members 6, 7 when the device is closed up.
GB1471430A 1930-05-13 1930-05-13 Improvements in or relating to geodetic base-line measuring devices Expired GB351669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1471430A GB351669A (en) 1930-05-13 1930-05-13 Improvements in or relating to geodetic base-line measuring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1471430A GB351669A (en) 1930-05-13 1930-05-13 Improvements in or relating to geodetic base-line measuring devices

Publications (1)

Publication Number Publication Date
GB351669A true GB351669A (en) 1931-07-02

Family

ID=10046195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1471430A Expired GB351669A (en) 1930-05-13 1930-05-13 Improvements in or relating to geodetic base-line measuring devices

Country Status (1)

Country Link
GB (1) GB351669A (en)

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