GB603321A - Target direction finding apparatus - Google Patents
Target direction finding apparatusInfo
- Publication number
- GB603321A GB603321A GB27764/45A GB2776445A GB603321A GB 603321 A GB603321 A GB 603321A GB 27764/45 A GB27764/45 A GB 27764/45A GB 2776445 A GB2776445 A GB 2776445A GB 603321 A GB603321 A GB 603321A
- Authority
- GB
- United Kingdom
- Prior art keywords
- target
- see
- cathode
- photocell
- disc
- 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)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
603,321. Photo-electric apparatus for direction finding. FARNSWORTH TELEVISION & RADIO CORPORATION. Oct. 22, 1945, No. 27764. Convention date, Sept. 29, 1944. [Class 40 (iii)] [Also in Group XL (a)] In a direction-finding system, light from a target is projected, with intermittent interruption, on to a photosensitive cathode in such a manner as to produce a circular trace the location of the centre of which is representative of the target direction. In Fig. 1, the photo - sensitive cathode 12 of a photocell is divided into quadrants I, II, III, IV (see also Fig. 2), contained-in an evacuated envelope 11. Light from a distant target is projected on to the cathode through a lens 25 mounted eccentrically in an otherwise opaque disc 26 (see also Fig. 3), which is rotated about an axis common to the photocell to produce a circular trace 33 (see Fig. 2), the position of the centre 34 of which is representative of target direction relative to the common axis. To discriminate between the standing currents of the photocell and those due to the target the latter are made intermittent by arranging a disc 27 containing alternate opaque and transparent sectors to rotate with disc 26 (see also Fig. 3) and fixing a similar stationary disc 30 (see also Fig. 4) on the common axis between the lens carrier and the photocell. Each cathode quadrant is associated with an electron multiplier, e.g. 13, 14, the electrode potentials of which are supplied by separate sources, e.g. 17, 18. The A.C. components of the voltages across electron multiplier load resistances, e.g. 19, 20, are applied through capacitors, e.g. 23, 24, to amplifiers, e.g. 20, 21. The relative outputs of the four amplifiers are thus dependent on target direction and are equal if the target is on the common axis. The following modifications are referred to : (a) a single supply source for the electron multiplier electrodes; (b) tuned circuits resonant at the interruption frequency in place of the resistive loads of the electron multipliers; (c) division of the photo-sensitive cathode into a number of segments other than four; (d) operation without electron multipliers ; (e) positioning of the interrupting discs between the target and the lens.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US603321XA | 1944-09-29 | 1944-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB603321A true GB603321A (en) | 1948-06-14 |
Family
ID=22028834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27764/45A Expired GB603321A (en) | 1944-09-29 | 1945-10-22 | Target direction finding apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB603321A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1074864B (en) * | 1960-02-04 | Alfeld/Leine Dr. Hans Schellhoss | Vehicle radar device | |
DE1191119B (en) * | 1953-06-17 | 1965-04-15 | Jean Turck | Device for determining the angular deviation of an incident radiation with respect to a reference direction |
US3293980A (en) * | 1960-10-26 | 1966-12-27 | Bombrini Parodi Delfino Spa | Device for detecting the angular position of a luminous source |
DE1269508B (en) * | 1958-08-11 | 1968-05-30 | Dehavilland Aircraft | Seeker guidance for unmanned aerial vehicles |
DE1498001B1 (en) * | 1965-05-03 | 1977-06-16 | Philco Ford Corp | DEVICE FOR THE TRACKING OF A TARGET OBJECT, IN PARTICULAR AIRCRAFT |
-
1945
- 1945-10-22 GB GB27764/45A patent/GB603321A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1074864B (en) * | 1960-02-04 | Alfeld/Leine Dr. Hans Schellhoss | Vehicle radar device | |
DE1191119B (en) * | 1953-06-17 | 1965-04-15 | Jean Turck | Device for determining the angular deviation of an incident radiation with respect to a reference direction |
DE1269508B (en) * | 1958-08-11 | 1968-05-30 | Dehavilland Aircraft | Seeker guidance for unmanned aerial vehicles |
US3293980A (en) * | 1960-10-26 | 1966-12-27 | Bombrini Parodi Delfino Spa | Device for detecting the angular position of a luminous source |
DE1498001B1 (en) * | 1965-05-03 | 1977-06-16 | Philco Ford Corp | DEVICE FOR THE TRACKING OF A TARGET OBJECT, IN PARTICULAR AIRCRAFT |
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