GB581982A - Improvements relating to electrical apparatus for the measurement of distances by the reflection of electromagnetic waves - Google Patents
Improvements relating to electrical apparatus for the measurement of distances by the reflection of electromagnetic wavesInfo
- Publication number
- GB581982A GB581982A GB1855742A GB1855742A GB581982A GB 581982 A GB581982 A GB 581982A GB 1855742 A GB1855742 A GB 1855742A GB 1855742 A GB1855742 A GB 1855742A GB 581982 A GB581982 A GB 581982A
- Authority
- GB
- United Kingdom
- Prior art keywords
- telephone
- meter
- frequency
- noise
- distances
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/282—Transmitters
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
581,982. Radar. COSSOR, Ltd., A. C., and STRAFFORD, F. R. W. Dec. 30, 1942, No. 18557. [Class 40 (v)] Apparatus for measuring distances by reflected waves comprises a super-regenerative receiver which transmits a signal every time the quench is removed, means for varying the quenching frequency, and means for indicating the presence or disappearance of noise in the detector circuit. The Figure shows such a receiver coupled direct to the aerial 15, with a telephone 19 in the anode circuit and a pulse generator 21 producing the quenching frequency which is indicated by the meter 23. In operation, the pulse generator is adjusted by hand until noise ceases in the telephone, the distance being then indicated by meter 23. The telephone may be replaced by a meter measuring the audio-frequency output or changes in the D.C. component of the anode current. To detect the arrival of a reflecting body at a predetermined range, the quenching frequency may be adjusted to that range and an alarm circuit arranged to operate in response to the disappearance of noise from the detector output, to a decrease in the audio-frequency output, or to an increase in the D.C. component of the anode current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1855742A GB581982A (en) | 1942-12-30 | 1942-12-30 | Improvements relating to electrical apparatus for the measurement of distances by the reflection of electromagnetic waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1855742A GB581982A (en) | 1942-12-30 | 1942-12-30 | Improvements relating to electrical apparatus for the measurement of distances by the reflection of electromagnetic waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB581982A true GB581982A (en) | 1946-10-31 |
Family
ID=10114489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1855742A Expired GB581982A (en) | 1942-12-30 | 1942-12-30 | Improvements relating to electrical apparatus for the measurement of distances by the reflection of electromagnetic waves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB581982A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2961652A (en) * | 1948-12-16 | 1960-11-22 | Robert W Bogle | Radio altimeters |
| US2961653A (en) * | 1948-12-16 | 1960-11-22 | Robert W Bogle | Radio ranging devices |
| US2975414A (en) * | 1948-12-16 | 1961-03-14 | Robert W Bogle | Radio ranging device |
| US2980905A (en) * | 1948-12-16 | 1961-04-18 | Joseph W Gratian | Radio ranging device |
| US2984833A (en) * | 1948-12-16 | 1961-05-16 | Robert T Nieset | Super-regenerative radio ranging device |
-
1942
- 1942-12-30 GB GB1855742A patent/GB581982A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2961652A (en) * | 1948-12-16 | 1960-11-22 | Robert W Bogle | Radio altimeters |
| US2961653A (en) * | 1948-12-16 | 1960-11-22 | Robert W Bogle | Radio ranging devices |
| US2975414A (en) * | 1948-12-16 | 1961-03-14 | Robert W Bogle | Radio ranging device |
| US2980905A (en) * | 1948-12-16 | 1961-04-18 | Joseph W Gratian | Radio ranging device |
| US2984833A (en) * | 1948-12-16 | 1961-05-16 | Robert T Nieset | Super-regenerative radio ranging device |
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