GB386356A - Improvements in and relating to high frequency signal transmission systems - Google Patents
Improvements in and relating to high frequency signal transmission systemsInfo
- Publication number
- GB386356A GB386356A GB24448/31A GB2444831A GB386356A GB 386356 A GB386356 A GB 386356A GB 24448/31 A GB24448/31 A GB 24448/31A GB 2444831 A GB2444831 A GB 2444831A GB 386356 A GB386356 A GB 386356A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- capacitance
- sheath
- cathode
- frequency
- 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
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/02—Gas or vapour dielectrics
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/10—Angle modulation by means of variable impedance
- H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
- H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
Abstract
386,356. Wireless transmitting systems. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. -(Assignees of Langmuir, 1.; 6, Stratford Road, Schenectady, New York, U.S.A.) Aug. 31, 1931, No. 24448. Convention date, Sept.'2, 1930. [Classes 39 (i) and 40 (v).] An electron-discharge device in which a sheath of positive ions is attracted by a negative charge on an electrode 6, Fig. 2, immersed in an ionized gas or vapour is used as a variable capacitance in high-frequency signal transmission systems, the thickness of the sheath, and so the capacitance, being controlled in accordance with the signals and varying the frequency of the oscillations transmitted. The thickness of the sheath is varied by varying the potential of the electrode 6 or the ionization of the gas. It is stated that the electrode 6 acts as one plate of the capacitance, the gas being the other plate and the sheath of ions being the dielectric, and formulae for the capacitance at various frequencies are given. The. electrode 6 may be a plate or grid and may be immersed in uniformly ionized gas or in the region about a column discharge. Oscillations generated by a triode 8, a tuned circuit 9 and a piezo-electric crystal 10 are varied in frequency by the capacitance between the electrode 6 and an electron-emitting cathode 2. The speechcurrent transformer 25 may vary the potential of the anode 3 or electrode 6 relatively to the cathode 2, or of the cathode 2 relatively to both electrodes 3, 6 or may be centre-tapped and connected as in Fig. 5. Batteries 5, 7 maintain the electrodes 3, 6 positive and negative with respect to the cathode 2. The oscillations are transmitted through an amplifier or frequency-multiplier 12. The Specification as open to inspection under Sect. 91 comprises also the use of the discharge device as a variable capacitance in electric circuits generally. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US479228A US2032620A (en) | 1930-09-02 | 1930-09-02 | Electron discharge apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB386356A true GB386356A (en) | 1933-01-19 |
Family
ID=23903154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24448/31A Expired GB386356A (en) | 1930-09-02 | 1931-08-31 | Improvements in and relating to high frequency signal transmission systems |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2032620A (en) |
| DE (1) | DE571531C (en) |
| GB (1) | GB386356A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2436640A (en) * | 1942-05-07 | 1948-02-24 | Nils Georg Schonander | Device for the frequency modulation of the resonant frequency of cavity resonators |
| US2480820A (en) * | 1943-01-11 | 1949-08-30 | Rca Corp | Wave length control of wave energy |
| US2530401A (en) * | 1943-01-14 | 1950-11-21 | Rothstein Jerome | Pulse-echo system utilizing an electron buncher tube |
| US2473556A (en) * | 1943-03-15 | 1949-06-21 | Carl A Wiley | Device for controlling oscillating circuits |
| US2450182A (en) * | 1943-03-26 | 1948-09-28 | Sylvania Electric Prod | Frequency modulation at ultra high frequencies |
| FR962874A (en) * | 1943-04-27 | 1950-06-22 | ||
| US2461307A (en) * | 1944-11-13 | 1949-02-08 | Rauland Corp | Modulating system |
| US2462367A (en) * | 1945-01-25 | 1949-02-22 | Forest Lee De | Frequency modulating device |
| US2555959A (en) * | 1946-10-18 | 1951-06-05 | Bell Telephone Labor Inc | Nonlinear reactance circuits utilizing high dielectric constant ceramics |
| BE486127A (en) * | 1947-12-03 | |||
| US2656466A (en) * | 1949-08-27 | 1953-10-20 | Rca Corp | Capacttor and circuit |
| US2676302A (en) * | 1950-12-14 | 1954-04-20 | Rca Corp | Frequency modulation |
| CN103770953B (en) * | 2013-12-17 | 2016-12-07 | 兰州空间技术物理研究所 | Spacecraft structural potential active control device and control method thereof |
-
1930
- 1930-09-02 US US479228A patent/US2032620A/en not_active Expired - Lifetime
-
1931
- 1931-08-30 DE DEI42451D patent/DE571531C/en not_active Expired
- 1931-08-31 GB GB24448/31A patent/GB386356A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE571531C (en) | 1933-03-01 |
| US2032620A (en) | 1936-03-03 |
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