GB577936A - Improvements in or relating to electrical indicating apparatus - Google Patents
Improvements in or relating to electrical indicating apparatusInfo
- Publication number
- GB577936A GB577936A GB401341A GB401341A GB577936A GB 577936 A GB577936 A GB 577936A GB 401341 A GB401341 A GB 401341A GB 401341 A GB401341 A GB 401341A GB 577936 A GB577936 A GB 577936A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aircraft
- oscillator
- reflected
- class
- indicate
- 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
- 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)
- Radar Systems Or Details Thereof (AREA)
Abstract
577,936. Directive wireless signalling. BROWNE, C. O. March 25, 1941, No. 4013. [Class 40 (v)] [Also in Group XXXVI] The binaural effect is utilized on an aircraft to determine the direction of reflected electromagnetic waves. Waves emitted at 1 and reflected by an obstacle are received on spaced aerials 2, 3, amplified at 4, 5 and fed to the separate earpieces of a telephone receiver 6, or to phase-shifters 8, 9 controlling the phase of audio-frequency currents produced by oscillator 7. To indicate to the pilot whether the aircraft located lies above or below his own aircraft, the reflected signals picked up by two additional aerials may switch the oscillator 7 to produce, say, dots and dashes where the reflecting aircraft is above and below respectively. To indicate the range of the reflecting aircraft, the pitch of the note of the oscillator 7 may be varied by an omnidirectional aerial which varies the frequency of the oscillator 7 according to the intensity of the reflected signal. Specification 146,192, [Class 40 (v)], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB401341A GB577936A (en) | 1941-03-25 | 1941-03-25 | Improvements in or relating to electrical indicating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB401341A GB577936A (en) | 1941-03-25 | 1941-03-25 | Improvements in or relating to electrical indicating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB577936A true GB577936A (en) | 1946-06-06 |
Family
ID=9769110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB401341A Expired GB577936A (en) | 1941-03-25 | 1941-03-25 | Improvements in or relating to electrical indicating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB577936A (en) |
-
1941
- 1941-03-25 GB GB401341A patent/GB577936A/en not_active Expired
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