GB783474A - Improvements in or relating to apparatus for use in the determination of the position of a point on a plane surface, given the differences between the distances between t he point and three fixed points on the same surface - Google Patents
Improvements in or relating to apparatus for use in the determination of the position of a point on a plane surface, given the differences between the distances between t he point and three fixed points on the same surfaceInfo
- Publication number
- GB783474A GB783474A GB24182/55A GB2418255A GB783474A GB 783474 A GB783474 A GB 783474A GB 24182/55 A GB24182/55 A GB 24182/55A GB 2418255 A GB2418255 A GB 2418255A GB 783474 A GB783474 A GB 783474A
- Authority
- GB
- United Kingdom
- Prior art keywords
- point
- rod
- frame
- pivot
- photo
- 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
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Eye Examination Apparatus (AREA)
Abstract
783,474. Photo-electric control arrangements. NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ. Aug. 22, 1955 [Aug. 23, 1954], No. 24182/55. Class 40 (3). [Also in Groups XIX and XXXVIII] Apparatus for determining the position of a point on a plane given the differences between the distances of that point from three fixed points on the surface (see Group XIX) comprises three rods, such as 3, having a common pivot 2 and each rotatable about, and longitudinal movable relative to, a respective pivot 11 representing a corresponding one of the three fixed points. In use, two of the rods are driven by means of respective motors 17 so as to move the pivot 2 which in turn varies the effective length of the third rod 3. For this purpose, the rod 3 is followed by its supporting frame 14, on which it is relatively movable, under the control of a photo-electric follow-up system. The latter comprises a pair of photo-cells 20, 20<SP>1</SP> carried on the frame 14 together with a light source and two fixed prisms or mirrors 19, 19<SP>1</SP> between which a light beam is normally directed by a prism or mirror 21, rotatable by movement of a holder 12 secured to the rod 3 relative to the frame 14. Thus, on movement of the rod 3, one or other of the cells is activated and a corresponding one of a pair of reversely operating motors, Fig. 7 (not shown), is energized. These motors control a synchro-motor associated with the motor 17. The motor 17 drives a shaft 16 on which is threaded a nut 15 carried by the frame 14, and is operated in the appropriate direction to cause the frame 14 to follow the holder 12. The driving synchromotor also adjusts a variable resistance so that the value of the resistance varies in accordance with the effective length of the rod 3. The resistance is connected in a bridge circuit in which the known difference values are set and balance of which indicates that the position of the pivot 2 corresponds to that of the point to be determined.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL783474X | 1954-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB783474A true GB783474A (en) | 1957-09-25 |
Family
ID=19832219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24182/55A Expired GB783474A (en) | 1954-08-23 | 1955-08-22 | Improvements in or relating to apparatus for use in the determination of the position of a point on a plane surface, given the differences between the distances between t he point and three fixed points on the same surface |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB783474A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3487547A (en) * | 1968-04-10 | 1970-01-06 | Brown Associates Inc D | Self-calibrating multilaterative plate comparator |
| US4176455A (en) * | 1977-02-24 | 1979-12-04 | Copeland Thomas M | Plotting apparatus |
-
1955
- 1955-08-22 GB GB24182/55A patent/GB783474A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3487547A (en) * | 1968-04-10 | 1970-01-06 | Brown Associates Inc D | Self-calibrating multilaterative plate comparator |
| US4176455A (en) * | 1977-02-24 | 1979-12-04 | Copeland Thomas M | Plotting apparatus |
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