GB1325361A - Electrical heating devices - Google Patents
Electrical heating devicesInfo
- Publication number
- GB1325361A GB1325361A GB1325361DA GB1325361A GB 1325361 A GB1325361 A GB 1325361A GB 1325361D A GB1325361D A GB 1325361DA GB 1325361 A GB1325361 A GB 1325361A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- capacitor
- transformer
- rectifier
- microwave oven
- 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
- 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
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
1325361 Microwave oven circuits C E M TIBBS 19 April 1971 [5 Jan 1970] 474/70 Heading H2H A supply circuit for a microwave oven comprises a magnetron valve 7 supplied by a leakage reactance transformer 2-4 via a bridge rectifier 5, the rectifier output being shunted by a capacitor 9 which capacitor is adapted to protect the circuit from voltage surges caused by fluctuations in the current drawn through the valve 7 in combination with the reactance of the transformer secondary 4. A series capacitor 6 or a valve equal or less than shunt 9 may be included between the seondary 4 and the bridge 5 and a further inductance (10) or (10<SP>1</SP>) , Fig. 3 (not shown), may be included in thesupplylead to the valve 7. In a modification, Fig. 4 (not shown), two series capacitors (11), (12) having substantially equal capacitances are connected across the output of the rectifier (5), the secondary (4) of the transformer being connected across one capacitor (11) such that a voltage doubling arrangement is produced, capacitors (11), (12) serving both the obviate the effects of varying currents through the valve (7) and also variations in supply voltage.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB47470 | 1971-04-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1325361A true GB1325361A (en) | 1973-08-01 |
Family
ID=9705000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1325361D Expired GB1325361A (en) | 1971-04-19 | 1971-04-19 | Electrical heating devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1325361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4042871A (en) * | 1975-11-14 | 1977-08-16 | Ecc Corporation | Conversion system with overcurrent protection and start-up circuitry |
| EP1239706A2 (en) * | 2001-03-09 | 2002-09-11 | Samsung Electronics Co., Ltd. | Microwave oven electrical power supply |
-
1971
- 1971-04-19 GB GB1325361D patent/GB1325361A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4042871A (en) * | 1975-11-14 | 1977-08-16 | Ecc Corporation | Conversion system with overcurrent protection and start-up circuitry |
| EP1239706A2 (en) * | 2001-03-09 | 2002-09-11 | Samsung Electronics Co., Ltd. | Microwave oven electrical power supply |
| EP1239706A3 (en) * | 2001-03-09 | 2003-10-08 | Samsung Electronics Co., Ltd. | Microwave oven electrical power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |