GB232402A - Improvements in distance or range finders applicable also for use in military surveying and the like - Google Patents
Improvements in distance or range finders applicable also for use in military surveying and the likeInfo
- Publication number
- GB232402A GB232402A GB842824A GB842824A GB232402A GB 232402 A GB232402 A GB 232402A GB 842824 A GB842824 A GB 842824A GB 842824 A GB842824 A GB 842824A GB 232402 A GB232402 A GB 232402A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- frame
- range
- movement
- rays
- 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
- G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
- G01C3/12—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument with monocular observation at a single point, e.g. coincidence type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
232,402. Eden, J. L. April 3, 1924. Range-finders.- Short-base coincidence rangefinders of the type described in Specifications 6537/13 and 22539/14 comprise a closed case 1 having openings or objectives 2, 3 in the front vertical wall, the reflecting prism 7 opposite the left-hand objective 2 being fixed, and the second prism 6 mounted in a frame 4 pivoted on the hypotenuse of the fixed prism 7. Rays entering the objective 2 are reflected by the prisms 7, 6 to the glass plate 13, the lower half of which is silvered, from which the rays are reflected and received in an eyepiece 10. This plate 13 is mounted in a frame 14 pivoted about an axis 15. Two range scale screws 20, 18 are provided for the adjustment of the frames 4, 14 respectively. The range scale is engraved on a screw 22 having a comparatively coarse thread so that the scale may be open and movement of the head 24 is communicated to the lever 4<x> of the frame 4 bv the finely screwed rod 25, the upper end of which is square and sliding in the screw 22. The lower end of the rod is pointed and screws into the base of the nut 21. This arrangement gives a small movement to the frame 4 and a greater movement to the range scale. Adjustment of the instrument for wear &c. is effected by the movement of a vertical glass plate 26, situated near the right hand objective 3, about an axis 28 by the screw 29 as shown, causing a slight deviation of the image formed by the rays entering the aperture 3. In a modification prisms 7 and 6 are dispensed with and the aperture 2 placed so that the rays from the object reach the mirror 13 direct. In this case only a single range screw is used.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB842824A GB232402A (en) | 1924-04-03 | 1924-04-03 | Improvements in distance or range finders applicable also for use in military surveying and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB842824A GB232402A (en) | 1924-04-03 | 1924-04-03 | Improvements in distance or range finders applicable also for use in military surveying and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB232402A true GB232402A (en) | 1925-04-23 |
Family
ID=9852312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB842824A Expired GB232402A (en) | 1924-04-03 | 1924-04-03 | Improvements in distance or range finders applicable also for use in military surveying and the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB232402A (en) |
-
1924
- 1924-04-03 GB GB842824A patent/GB232402A/en not_active Expired
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