GB191108702A - Improvements in Surveying Instruments. - Google Patents

Improvements in Surveying Instruments.

Info

Publication number
GB191108702A
GB191108702A GB191108702DA GB191108702A GB 191108702 A GB191108702 A GB 191108702A GB 191108702D A GB191108702D A GB 191108702DA GB 191108702 A GB191108702 A GB 191108702A
Authority
GB
United Kingdom
Prior art keywords
telescope
stage
fitted
vertical axis
reading
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
Inventor
Henry Thomas Tallack
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB191108702A publication Critical patent/GB191108702A/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
    • G01C1/00—Measuring angles
    • G01C1/02—Theodolites

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Telescopes (AREA)

Abstract

8702. Tallack, H. T. April 7. Sighting-levels; theodolites. -Relates chiefly to the combination of the gradient arrangement described in Specification 6229/95 with a telescope mounted on a vertical axis as described in Specification 2375/64. The telescope is mounted on a vertical axis on a stage C carried on the gradient arrangement, which is mounted on a second stage B rigidly fitted to the cover-plate of an ordinary theodolite. On the telescope is fitted a vernier E reading off on a graduated circle D fitted on the stage C. In this way, by rotating the telescope over the circle, a very fine reading of a grade can be obtained.
GB191108702D 1911-04-07 1911-04-07 Improvements in Surveying Instruments. Expired GB191108702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191108702T 1911-04-07

Publications (1)

Publication Number Publication Date
GB191108702A true GB191108702A (en) 1911-11-23

Family

ID=32498530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191108702D Expired GB191108702A (en) 1911-04-07 1911-04-07 Improvements in Surveying Instruments.

Country Status (1)

Country Link
GB (1) GB191108702A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061898A (en) * 2014-06-16 2014-09-24 苏州理欧电子科技有限公司 Automatic detection device for accuracy of horizontal angle measurement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061898A (en) * 2014-06-16 2014-09-24 苏州理欧电子科技有限公司 Automatic detection device for accuracy of horizontal angle measurement

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