GB468271A - Improvements in or relating to electrical oscillation generators - Google Patents
Improvements in or relating to electrical oscillation generatorsInfo
- Publication number
- GB468271A GB468271A GB12688/37A GB1268837A GB468271A GB 468271 A GB468271 A GB 468271A GB 12688/37 A GB12688/37 A GB 12688/37A GB 1268837 A GB1268837 A GB 1268837A GB 468271 A GB468271 A GB 468271A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- modulating
- quarter
- anode
- split
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/28—Amplitude modulation by means of transit-time tube
- H03C1/30—Amplitude modulation by means of transit-time tube by means of a magnetron
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B9/00—Generation of oscillations using transit-time effects
- H03B9/01—Generation of oscillations using transit-time effects using discharge tubes
- H03B9/10—Generation of oscillations using transit-time effects using discharge tubes using a magnetron
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Microwave Tubes (AREA)
Abstract
468,271. Valve circuits. STANDARD TELEPHONES & CABLES, Ltd. May 5, 1936, No. 12688. Convention date, May 29, 1935. [Classes 39 (i) and 40 (v)] In a magnetron oscillator, the modulating potentials are applied simultaneously to the field coil 18 and to'auxiliary electrodes, while the carrier oscillations are applied to the main electrodes. The auxiliary electrodes may comprise end plates 50, 52 or portions 100, 102 of a quadrantally split anode. The highvacuum tube 10, Fig. 3, has a coil 18 for producing a magnetic field which may be axial or inclined, and has end plates 50, 52 so biassed positively as to increase the oscillatory output, or biassed negatively to protect the ends of the glass or quartz envelope from bombardment and sputtering. According to the invention, modulating potentials derived from a microphone 64 are applied both to the coil 18 and to the end plates 50, the adjustments being such as to produce distortionless amplitude modulation free from frequency modulation. Frequency is stabilized by a piezoelectric resonator 90 coupled to the magnetron through a tapped transformer 96 and tuning- condenser 80, and the output is taken from conductors 81, 83. In a modification, Fig. 1 (not shown), the plates 50, 52 are excited in the same phase by a simple transformer instead of the tapped transformer 70, and the tuning system 80, 90 is replaced by a pair of Lecher wires. In a further modification, Fig. 4, a magnetic core 122 having polepieces 129 coaxial with and external to the envelope is provided. The anode is split into four quarter-cylinders ; the tuning circuit 80, 90 is connected by conductors 81, 83 to one pair of opposite quarter-cylinders, while the modulating transformer 116 is connected to the other (separately biassed) pair as well as to the magnetizing coil 124. In a further modification, Fig. 6. (not shown), the modulating voltage is applied to only one quarter-cylinder, the opposite quarter-cylinder being kept at a fixed potential for the purpose of stabilizing the oscillations. The Specification as open to inspection under Sect. 91 describes also a further modification, Figs. 7, 8 (Cancelled, not shown), in which the anode is split into two halfcylinders which are connected to the modulating circuit as well as to the source of carrier ,current. There may be an iron core with a biassing coil as well. as a modulating coil, Fig. 9 (Cancelled, not shown). Various other combinations in which the foregoing features may be used are mentioned. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24060A US2122495A (en) | 1935-05-29 | 1935-05-29 | Magnetron oscillator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB468271A true GB468271A (en) | 1937-07-01 |
Family
ID=21818661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12688/37A Expired GB468271A (en) | 1935-05-29 | 1936-05-05 | Improvements in or relating to electrical oscillation generators |
Country Status (4)
Country | Link |
---|---|
US (1) | US2122495A (en) |
BE (1) | BE468271A (en) |
FR (1) | FR812051A (en) |
GB (1) | GB468271A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2500328A (en) * | 1945-03-27 | 1950-03-14 | Raytheon Mfg Co | Pulsed oscillator of the magnetron type |
US2493706A (en) * | 1948-03-30 | 1950-01-03 | Gen Precision Lab Inc | Electronic switch |
US2648772A (en) * | 1949-02-15 | 1953-08-11 | Raytheon Mfg Co | Magnetron control circuits |
US2774941A (en) * | 1952-11-14 | 1956-12-18 | Raytheon Mfg Co | Communication systems |
US2817820A (en) * | 1952-12-31 | 1957-12-24 | Raytheon Mfg Co | Frequency-modulated communication systems |
US2925523A (en) * | 1957-02-12 | 1960-02-16 | Sylvania Electric Prod | Wave generator |
-
0
- BE BE468271D patent/BE468271A/xx unknown
-
1935
- 1935-05-29 US US24060A patent/US2122495A/en not_active Expired - Lifetime
-
1936
- 1936-05-05 GB GB12688/37A patent/GB468271A/en not_active Expired
- 1936-05-28 FR FR812051D patent/FR812051A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE468271A (en) | |
US2122495A (en) | 1938-07-05 |
FR812051A (en) | 1937-04-29 |
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