GB496598A - Improvements in or relating to optical plumbing devices for use in conjunction with surveying instruments - Google Patents
Improvements in or relating to optical plumbing devices for use in conjunction with surveying instrumentsInfo
- Publication number
- GB496598A GB496598A GB1999837A GB1999837A GB496598A GB 496598 A GB496598 A GB 496598A GB 1999837 A GB1999837 A GB 1999837A GB 1999837 A GB1999837 A GB 1999837A GB 496598 A GB496598 A GB 496598A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relating
- conjunction
- adjustable
- sighting means
- telescope
- 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
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
496,598. Theodolites &c. COOKE, TROUGHTON, & SIMMS, Ltd., TAYLOR, E. W., and HARRISON, J. W. July 19, 1937, No. 19998. [Class 97 (ii)] Sighting means 2 in one position are trained on a point vertically above the pivot point of the telescope 1 and when turned through 180‹ in a vertical plane are trained through an optical path 16 in the base of the instrument on a point vertically below. As shown the sighting means 2 is secured by plate 14 to the telescope 1 and comprises a window 12, prism 5, adjustable objective 4, graticule 6 adapted to be centralized by four capstan head screws 11 and an adjustable eyepiece 8. An adjustable spirit level 3 is carried by an arm 13 extending from the sighting means 2. The optical path 16 through the base of the instrument has windows 18, 27 at the ends and may have a pair of lenses 20, 23, and a field stop F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1999837A GB496598A (en) | 1937-07-19 | 1937-07-19 | Improvements in or relating to optical plumbing devices for use in conjunction with surveying instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1999837A GB496598A (en) | 1937-07-19 | 1937-07-19 | Improvements in or relating to optical plumbing devices for use in conjunction with surveying instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB496598A true GB496598A (en) | 1938-12-02 |
Family
ID=10138630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1999837A Expired GB496598A (en) | 1937-07-19 | 1937-07-19 | Improvements in or relating to optical plumbing devices for use in conjunction with surveying instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB496598A (en) |
-
1937
- 1937-07-19 GB GB1999837A patent/GB496598A/en not_active Expired
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