BE476639A - - Google Patents
Info
- Publication number
- BE476639A BE476639A BE476639DA BE476639A BE 476639 A BE476639 A BE 476639A BE 476639D A BE476639D A BE 476639DA BE 476639 A BE476639 A BE 476639A
- Authority
- BE
- Belgium
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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
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- 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)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12500/41A GB552260A (en) | 1941-09-26 | 1941-09-26 | Improvements in or relating to radio altimeters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE476639A true BE476639A (d) |
Family
ID=10005733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE476639D BE476639A (d) | 1941-09-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2395928A (d) |
| BE (1) | BE476639A (d) |
| FR (1) | FR939391A (d) |
| GB (1) | GB552260A (d) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2490808A (en) * | 1942-11-28 | 1949-12-13 | Standard Telephones Cables Ltd | Radio detection system |
| US2603744A (en) * | 1945-09-14 | 1952-07-15 | Roland W Larson | Tuning mechanism |
| US2724055A (en) * | 1945-09-17 | 1955-11-15 | Bliss William Roderic | Coupling system for high frequencies |
| US2448554A (en) * | 1946-02-27 | 1948-09-07 | Nicholas T Simopoulos | Ultra high frequency tuning unit |
| US2570295A (en) * | 1948-04-27 | 1951-10-09 | Jr Harry Vantine | Parachute safety opener |
| US2712061A (en) * | 1948-11-03 | 1955-06-28 | Westinghouse Electric Corp | Means for high speed keying at low radio frequency |
| US2755461A (en) * | 1951-06-07 | 1956-07-17 | Steven N Pantages | Cymatophone |
-
0
- BE BE476639D patent/BE476639A/xx unknown
-
1941
- 1941-09-26 GB GB12500/41A patent/GB552260A/en not_active Expired
-
1942
- 1942-07-17 US US451347A patent/US2395928A/en not_active Expired - Lifetime
-
1946
- 1946-10-24 FR FR939391D patent/FR939391A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2395928A (en) | 1946-03-05 |
| FR939391A (fr) | 1948-11-12 |
| GB552260A (en) | 1943-03-30 |