GB743887A - Improvements in and relating to control circuits for high frequency electronic oscillators - Google Patents
Improvements in and relating to control circuits for high frequency electronic oscillatorsInfo
- Publication number
- GB743887A GB743887A GB2709753A GB2709753A GB743887A GB 743887 A GB743887 A GB 743887A GB 2709753 A GB2709753 A GB 2709753A GB 2709753 A GB2709753 A GB 2709753A GB 743887 A GB743887 A GB 743887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oscillator
- diode
- bias
- rectifiers
- relating
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/04—Sources of current
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Resistance Heating (AREA)
Abstract
743,887. Automatic control systems for H.F. furnaces. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 23, 1954 [Oct. 2, 1953], No. 27097/53. Class 38 (4). In a high-frequency furnace in which the oscillator is supplied with high tension from grid controlled rectifiers, the bias on which is determined by the conductivity of a thermionic diode as in Specification 670,498, the diode filament is energized in accordance with the magnitude of the high tension current drawn by the oscillator so as to keep the output power substantially constant despite changes in output loading. The rectifiers V1, V2, V3 supplying the oscillator (not shown) have their grids connected to a star-connected secondary T1S of the main supply transformer (not shown), the star point having a D.C. bias tapped off potential divider VR1 via a cathode follower V4. The bias is varied by a diode V5 shunting the input ; and the heater of this diode is connected across a shunt, Fig. 1 (not shown), in the H.T. line between the rectifiers and the oscillator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2709753A GB743887A (en) | 1953-10-02 | 1953-10-02 | Improvements in and relating to control circuits for high frequency electronic oscillators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2709753A GB743887A (en) | 1953-10-02 | 1953-10-02 | Improvements in and relating to control circuits for high frequency electronic oscillators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB743887A true GB743887A (en) | 1956-01-25 |
Family
ID=10254145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2709753A Expired GB743887A (en) | 1953-10-02 | 1953-10-02 | Improvements in and relating to control circuits for high frequency electronic oscillators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB743887A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2522218A1 (en) * | 1982-02-19 | 1983-08-26 | Jakoubovitch A | Transistor power oscillator for inductive heating - has capacitive divider or low impedance transformer, emitter resistors and excitation current control |
-
1953
- 1953-10-02 GB GB2709753A patent/GB743887A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2522218A1 (en) * | 1982-02-19 | 1983-08-26 | Jakoubovitch A | Transistor power oscillator for inductive heating - has capacitive divider or low impedance transformer, emitter resistors and excitation current control |
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