GB474015A - Improvements in or relating to radio direction finding installations - Google Patents
Improvements in or relating to radio direction finding installationsInfo
- Publication number
- GB474015A GB474015A GB14752/37A GB1475237A GB474015A GB 474015 A GB474015 A GB 474015A GB 14752/37 A GB14752/37 A GB 14752/37A GB 1475237 A GB1475237 A GB 1475237A GB 474015 A GB474015 A GB 474015A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aerial
- filter
- glowlamp
- signals
- impulses
- 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)
- Circuits Of Receivers In General (AREA)
Abstract
474,015. Directive wireless signalling. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. May 27, 1937, No. 14752. Convention date, May 27, 1936. [Class 40 (v)] Relates to radio direction - indicators of the kind in which a frame aerial is rotated in synchronism with a glowlamp, the latter being energized by the incoming signal so as to give a constantly-visible bearing line. The invention consists in the provision of a blocking circuit designed to separate a desired signal from interfering ones. As shown in the Figure, the aerial R and glowlamp indicator G are rotated synchronously, and the pick-up signals are fed through an amplifier E and note-frequency filter F to the glow-lamp. A local oscillator O controlled by an auxiliary aerial HA feeds impulses of the same frequency as the desired signals to a valve forming part of the filter circuit F. Or a locally-produced heterodyne note may be used for the same purpose. The impulses serve to remove a prohibitive bias from the valve so that the filter is opened to pass the desired signals but not the others.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE474015X | 1936-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB474015A true GB474015A (en) | 1937-10-25 |
Family
ID=6541653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14752/37A Expired GB474015A (en) | 1936-05-27 | 1937-05-27 | Improvements in or relating to radio direction finding installations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB474015A (en) |
-
1937
- 1937-05-27 GB GB14752/37A patent/GB474015A/en not_active Expired
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