GB269718A - New form of theodolite - Google Patents

New form of theodolite

Info

Publication number
GB269718A
GB269718A GB843626A GB843626A GB269718A GB 269718 A GB269718 A GB 269718A GB 843626 A GB843626 A GB 843626A GB 843626 A GB843626 A GB 843626A GB 269718 A GB269718 A GB 269718A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
theodolite
scale
single compound
circles
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
GB843626A
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.)
THOMAS FRANCIS CONNOLLY
Original Assignee
THOMAS FRANCIS CONNOLLY
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 THOMAS FRANCIS CONNOLLY filed Critical THOMAS FRANCIS CONNOLLY
Priority to GB843626A priority Critical patent/GB269718A/en
Publication of GB269718A publication Critical patent/GB269718A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00Measuring angles
    • G01C1/02Theodolites
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00Measuring angles
    • G01C1/02Theodolites
    • G01C1/06Arrangements for reading scales

Landscapes

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

Abstract

269,718. Connolly, T. F. March 29, 1926. Theodolites.- The scale-reading device for a theodolite &c. consists of a single compound microscope in which both the graduated circles are observed. In the form shown the telescope a is of the CoudÚ type comprising a reflecting prism and a laterally extending eyepiece e in the field of view of which is a diaphragm d. The vertical and horizontal circles m, w have conical graduated surfaces a<1>, b<1>, so arranged that both are visible through a single compound microscope consisting of an objective t and a prism v forming an image on the diaphragm d. The diaphragm is provided with a suitable graticule or vernier scale to be read in conjunction with the scale images.
GB843626A 1926-03-29 1926-03-29 New form of theodolite Expired GB269718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB843626A GB269718A (en) 1926-03-29 1926-03-29 New form of theodolite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB843626A GB269718A (en) 1926-03-29 1926-03-29 New form of theodolite

Publications (1)

Publication Number Publication Date
GB269718A true GB269718A (en) 1927-04-28

Family

ID=9852449

Family Applications (1)

Application Number Title Priority Date Filing Date
GB843626A Expired GB269718A (en) 1926-03-29 1926-03-29 New form of theodolite

Country Status (1)

Country Link
GB (1) GB269718A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775158A (en) * 1952-05-09 1956-12-25 Reginald F Mitchell Optical angle setting and aligning device
US2853915A (en) * 1955-06-03 1958-09-30 Reginald F Mitchell Optical angle measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775158A (en) * 1952-05-09 1956-12-25 Reginald F Mitchell Optical angle setting and aligning device
US2853915A (en) * 1955-06-03 1958-09-30 Reginald F Mitchell Optical angle measuring device

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