NL52903C - - Google Patents
Info
- Publication number
- NL52903C NL52903C NL52903DA NL52903C NL 52903 C NL52903 C NL 52903C NL 52903D A NL52903D A NL 52903DA NL 52903 C NL52903 C NL 52903C
- Authority
- NL
- Netherlands
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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE207543X | 1937-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL52903C true NL52903C (fr) |
Family
ID=5793776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL52903D NL52903C (fr) | 1937-06-12 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2297249A (fr) |
| CH (1) | CH207543A (fr) |
| FR (1) | FR838981A (fr) |
| NL (1) | NL52903C (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2628350A (en) * | 1942-07-27 | 1953-02-10 | Robert M Page | Radio frequency energy range and direction finder |
| US2462188A (en) * | 1943-10-04 | 1949-02-22 | Automatic Elect Lab | Radio direction finder |
| US2459165A (en) * | 1944-11-11 | 1949-01-18 | Joseph Y Houghton | Method and apparatus for determining the three-dimensional direction of approach of an electromagnetic wave front |
| US2717380A (en) * | 1952-09-16 | 1955-09-06 | Jr Frederick E Brooks | Antenna system for measuring low elevation angles |
| US3093827A (en) * | 1959-12-11 | 1963-06-11 | Douglas N Travers | Three loop direction finder antenna for shipboard use |
-
0
- NL NL52903D patent/NL52903C/xx active
-
1938
- 1938-05-18 US US208562A patent/US2297249A/en not_active Expired - Lifetime
- 1938-06-03 CH CH207543D patent/CH207543A/de unknown
- 1938-06-08 FR FR838981D patent/FR838981A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR838981A (fr) | 1939-03-21 |
| CH207543A (de) | 1939-11-15 |
| US2297249A (en) | 1942-09-29 |