GB787653A - Improvements in and relating to direction finding aerials - Google Patents
Improvements in and relating to direction finding aerialsInfo
- Publication number
- GB787653A GB787653A GB304155A GB304155A GB787653A GB 787653 A GB787653 A GB 787653A GB 304155 A GB304155 A GB 304155A GB 304155 A GB304155 A GB 304155A GB 787653 A GB787653 A GB 787653A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- aerial
- bar
- compass
- coupled
- 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
- 229910001369 Brass Inorganic materials 0.000 abstract 2
- 239000010951 brass Substances 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 239000000696 magnetic material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000012216 screening Methods 0.000 abstract 1
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)
- Details Of Aerials (AREA)
Abstract
787,653. Aerials; radio direction finding. BROOKES & GATEHOUSE, Ltd. Feb. 2, 1956 [Feb. 2, 1955; Dec. 23, 1955], Nos. 3041/55 and 36998/55. Class 40 (7). A radio direction-finding aerial comprises a bar 10 of magnetic material, associated pick-up and coupling coils, and a co-operating angularly graduated scale from which the bearing of a beacon can be read. The aerial is particularly intended for use on small boats and may be coupled to a normal communications receiver for direction-finding by the null method. It may be mounted on a compass bowl 33 as shown in Fig. 1, the scale then being the compass scale. The bar is preferably about 10 times as long as its diameter and is provided with a substantially central pick-up coil 11 tuned by a variable condenser 12 adjusted by knob 32. Condenser and coil are mounted inside a screening can 13 having a slot 16 to prevent the can forming a short circuited turn. A coupling coil 14 wound round the bar 10 outside the screen is critically coupled to coil 11 and connected to a coaxial feeder leading to the receiver. On the other side of the screen a further coil 17 is wound round the bar and may be coupled through a resistor to an open sense aerial. The other end of coil 17 is connected to brass ring 20 capacitively coupled to case 13 which is in turn capacitively coupled on its opposite side to brass ring 22 connected to the outer (earthy) side of the coaxial cable feeder. Each of the rings 20 and 22 is provided with a radial gap. The projecting ends of the bar 10 are encased in protective insulating tubes 25 screwed into insulating members 26 which contain the coils 14 and 17 respectively and are attached to central insulating member 27. Member 27 is mounted on verge ring 29 by legs 28 and the ring 29 may be provided with a recess engaging the sighting means of the compass so that radio bearings can be taken quickly and accurately. Where the aerial is not to be mounted on a compass but on a flat base for use on a chart table the aerial is fixed to a plate 36 rotatably mounted on the base and carrying a pointer. A co-operating scale 35 is made independently rotatable so that the ship's heading may be set in against index 39 and the base is attached to the table with the part 38 aft so that a direct reading of bearing can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB304155A GB787653A (en) | 1955-02-02 | 1955-02-02 | Improvements in and relating to direction finding aerials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB304155A GB787653A (en) | 1955-02-02 | 1955-02-02 | Improvements in and relating to direction finding aerials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB787653A true GB787653A (en) | 1957-12-11 |
Family
ID=9750830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB304155A Expired GB787653A (en) | 1955-02-02 | 1955-02-02 | Improvements in and relating to direction finding aerials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB787653A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3020548A (en) * | 1958-05-19 | 1962-02-06 | Allen Bradford Inc | Portable radio direction finder |
| US3115635A (en) * | 1961-12-18 | 1963-12-24 | Jr John H Leeming | Portable direction finder |
| US3638112A (en) * | 1963-07-26 | 1972-01-25 | Int Space Corp | Vlf and elf spectrometer |
-
1955
- 1955-02-02 GB GB304155A patent/GB787653A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3020548A (en) * | 1958-05-19 | 1962-02-06 | Allen Bradford Inc | Portable radio direction finder |
| US3115635A (en) * | 1961-12-18 | 1963-12-24 | Jr John H Leeming | Portable direction finder |
| US3638112A (en) * | 1963-07-26 | 1972-01-25 | Int Space Corp | Vlf and elf spectrometer |
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