GB613688A - Improvements in high frequency heating systems - Google Patents
Improvements in high frequency heating systemsInfo
- Publication number
- GB613688A GB613688A GB19135/46A GB1913546A GB613688A GB 613688 A GB613688 A GB 613688A GB 19135/46 A GB19135/46 A GB 19135/46A GB 1913546 A GB1913546 A GB 1913546A GB 613688 A GB613688 A GB 613688A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- circuit
- grid
- high frequency
- oscillator
- 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)
- General Induction Heating (AREA)
Abstract
613,688. Induction heating. RADIO CORPORATION OF AMERICA. June 26, 1946, No. 19135. Convention date, June 26, 1945. [Class 39 (iii)] [Also in Group XL (c)] An induction heating system comprises a valve oscillator V<1>, V<2> connected by co-axial cables 15, 16, to a turned tank circuit 14 which also comprises the primary of a transformer TR coupling the heating coil 18 to the oscillator. An adjustable reactance 20 in series with the transformer secondary and the work coil, is mechanically coupled to a switch 50 which by means of a relay E 8 places a " keying " resistor 26 of high impedance in the grid circuit of the valve oscillator to stop oscillation thereof and thus remove high frequency power from the circuit before adjustment of the resistance 20 can be made. A relay E 9 is provided to short circuit grid resistors 23, 24, 25, when the anode supply potential is changed by means of a switch (not shown) to a lower value for low power operation. A further relay E 10 is also provided in the grid circuit for inserting resistors 29, 30, 31 in the grid circuit to limit the current therein as an overload protection, if the grid current exceeds the normal value by an amount sufficient to operate relay E10. A process timer 40 may be included to start and stop the supply of high frequency power by means of the relay E 8 operating the " keying " resistor already referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US613688XA | 1945-06-26 | 1945-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB613688A true GB613688A (en) | 1948-12-01 |
Family
ID=22035346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19135/46A Expired GB613688A (en) | 1945-06-26 | 1946-06-26 | Improvements in high frequency heating systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB613688A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2689900A (en) * | 1950-05-05 | 1954-09-21 | Westinghouse Electric Corp | Circuit for heat treating metallic objects |
-
1946
- 1946-06-26 GB GB19135/46A patent/GB613688A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2689900A (en) * | 1950-05-05 | 1954-09-21 | Westinghouse Electric Corp | Circuit for heat treating metallic objects |
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