GB655621A - Reducing tangent tacheometer - Google Patents
Reducing tangent tacheometerInfo
- Publication number
- GB655621A GB655621A GB34790/47A GB3479047A GB655621A GB 655621 A GB655621 A GB 655621A GB 34790/47 A GB34790/47 A GB 34790/47A GB 3479047 A GB3479047 A GB 3479047A GB 655621 A GB655621 A GB 655621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- scale
- tangent
- graduations
- class
- staff
- 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
- 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)
- Radar Systems Or Details Thereof (AREA)
Abstract
655,621. Surveying instruments. HORNOCH, A. TARCZY.- Dec. 30, 1947, No. 34790. Convention date, June 26, 1942. Drawings to Specifications. [Class 97 (ii)] The invention relates to direct reading tacheometers of the kind described in Specification 236,111, [Class 97 (ii)], in which the altitude circle is divided according to multiples (e.g. by 100) of the tangents of angles of elevation to form a scale whose image is projected into the field of view of the telescope so as to be visible with the image of the vertical staff. According to the invention the tangent scale is provided with intermediate graduations between the tangent graduations whose numerical values satisfy one or other of the equations where r signifies a cardinal number and k the round whole number, e.g. 100, 50, 20, 10 or 5 which it is desired to use as a multiplying factor when converting the scale readings into measurement of height between the staff and the observing point. Various sections, or the same section, of the tangent scale may be provided with intermediate graduations corresponding to more than one value of k. Measurements of height are made by reading off directly staff intercepts against adjacent intermediate scale graduations of the chosen multiplication. Specification 18721/12, [Class 97 (iii)], also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU655621X | 1942-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB655621A true GB655621A (en) | 1951-07-25 |
Family
ID=10979884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34790/47A Expired GB655621A (en) | 1942-06-26 | 1947-12-30 | Reducing tangent tacheometer |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB655621A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2204689A (en) * | 1987-05-12 | 1988-11-16 | Nat Res Dev | Measurement of a position |
-
1947
- 1947-12-30 GB GB34790/47A patent/GB655621A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2204689A (en) * | 1987-05-12 | 1988-11-16 | Nat Res Dev | Measurement of a position |
| GB2204689B (en) * | 1987-05-12 | 1991-09-11 | Nat Res Dev | Apparatus for the measurement of position |
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