NL57482C - - Google Patents
Info
- Publication number
- NL57482C NL57482C NL57482DA NL57482C NL 57482 C NL57482 C NL 57482C NL 57482D A NL57482D A NL 57482DA NL 57482 C NL57482 C NL 57482C
- 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
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
- G01S3/48—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Near-Field Transmission Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US231300A US2272056A (en) | 1938-09-23 | 1938-09-23 | Radio course indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL57482C true NL57482C (es) |
Family
ID=22868632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL57482D NL57482C (es) | 1938-09-23 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2272056A (es) |
| GB (1) | GB533782A (es) |
| NL (1) | NL57482C (es) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2689345A (en) * | 1949-06-25 | 1954-09-14 | Int Standard Electric Corp | Automatic approach control |
-
0
- NL NL57482D patent/NL57482C/xx active
-
1938
- 1938-09-23 US US231300A patent/US2272056A/en not_active Expired - Lifetime
-
1939
- 1939-08-16 GB GB23686/39A patent/GB533782A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB533782A (en) | 1941-02-20 |
| US2272056A (en) | 1942-02-03 |