GB190911327A - Improved Angle-measuring Surveying Instrument. - Google Patents
Improved Angle-measuring Surveying Instrument.Info
- Publication number
- GB190911327A GB190911327A GB190911327DA GB190911327A GB 190911327 A GB190911327 A GB 190911327A GB 190911327D A GB190911327D A GB 190911327DA GB 190911327 A GB190911327 A GB 190911327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirrors
- reading
- sighting
- instrument
- surveying instrument
- 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
- G01C1/08—Sextants
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Telescopes (AREA)
Abstract
11,327. Catt, J. May 13. Sextants.-An instrument which can be used as a single or double sextant comprises a casing having, at the end opposite to the sighting- device p, three apertures having sighting lines or slots o<2>, o<4>, Fig. 6, the images of the objects observed being brought into coincidence with the sighting-marks in the outer apertures by adjusting the mirrors h, the arms c, d carrying these mirrors crossing one another and reading on scales on each side of the centre. The arm c is cranked and passes under the lid of the box, but has its reading-end c<2> projecting as shown. The horizon mirrors can be adjusted so that the instrument can be used in the ordinary coincidence method; a compass with a reading-prism q<1> is fitted; and a handle in the shape of a hinged trigger-guard is provided to facilitate handling.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190911327T | 1909-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190911327A true GB190911327A (en) | 1910-05-12 |
Family
ID=32444280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190911327D Expired GB190911327A (en) | 1909-05-13 | 1909-05-13 | Improved Angle-measuring Surveying Instrument. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190911327A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3822480A (en) * | 1972-11-10 | 1974-07-09 | J Rolefson | Position locating device |
-
1909
- 1909-05-13 GB GB190911327D patent/GB190911327A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3822480A (en) * | 1972-11-10 | 1974-07-09 | J Rolefson | Position locating device |
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