GB190724305A - Improvements in and relating to Tacheometers. - Google Patents

Improvements in and relating to Tacheometers.

Info

Publication number
GB190724305A
GB190724305A GB190724305DA GB190724305A GB 190724305 A GB190724305 A GB 190724305A GB 190724305D A GB190724305D A GB 190724305DA GB 190724305 A GB190724305 A GB 190724305A
Authority
GB
United Kingdom
Prior art keywords
rod
racked
readings
distances
eyepiece
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
Daniel Despiau
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 GB190724305A publication Critical patent/GB190724305A/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
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/26—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length, at, near, or formed by the object
    • G01C3/28—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length, at, near, or formed by the object with provision for reduction of the distance into the horizontal plane
    • G01C3/30—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length, at, near, or formed by the object with provision for reduction of the distance into the horizontal plane with adaptation to the measurement of the height of an object, e.g. tacheometers

Landscapes

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

Abstract

24,305. Despiau, D. Nov.- 3, 1906, [date applied for under Patents Act, 1901]. Telemeters; theodolites.-An instrum e n t for giving readings of distances by sighting a surveying-rod consists of a box with a peep - hole eyepiece o which can be racked up and down, and with two glass plates a, b in front, one being fixed and the other b movable. Up to small distances readings are taken direct on the rod, but for fairly large distances, the rod serves as a fixed length and, after adjusting the eyepiece till the horizontal line y on the p 1 a t e a registers with the bottom of the rod, the plate b is racked up till an horizontal z on it corresponds with the top. The spindle v, by which the plate b is racked up, also carries a pinion t taking into a wheel carrying a scale, which can be used to give direct readings of the distance. The whole instrument can be rotated in azimuth, and a compass f can be fitted to give directions.
GB190724305D 1906-11-03 1906-11-03 Improvements in and relating to Tacheometers. Expired GB190724305A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR190724305X 1906-11-03

Publications (1)

Publication Number Publication Date
GB190724305A true GB190724305A (en) 1908-10-29

Family

ID=32525358

Family Applications (2)

Application Number Title Priority Date Filing Date
GB190724305D Expired GB190724305A (en) 1906-11-03 1906-11-03 Improvements in and relating to Tacheometers.
GB190916452D Expired GB190916452A (en) 1906-11-03 1909-07-14 Improvements in and relating to Tacheometers.

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB190916452D Expired GB190916452A (en) 1906-11-03 1909-07-14 Improvements in and relating to Tacheometers.

Country Status (1)

Country Link
GB (2) GB190724305A (en)

Also Published As

Publication number Publication date
GB190916452A (en) 1910-04-21

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