GB1465106A - Microwave heating apparatus - Google Patents
Microwave heating apparatusInfo
- Publication number
- GB1465106A GB1465106A GB1913074A GB1913074A GB1465106A GB 1465106 A GB1465106 A GB 1465106A GB 1913074 A GB1913074 A GB 1913074A GB 1913074 A GB1913074 A GB 1913074A GB 1465106 A GB1465106 A GB 1465106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- castellations
- oven
- choke
- door
- microwave
- 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
- H05B6/64—Heating using microwaves
- H05B6/76—Prevention of microwave leakage, e.g. door sealings
- H05B6/763—Microwave radiation seals for doors
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Electric Ovens (AREA)
Abstract
1465106 Microwave oven AMANA REFRIGERATION Inc 1 May 1974 [2 May 1973] 19130/74 Heading H5H A microwave oven has a microwave seal structure 58 defined between the conductive wall 23 of the access opening and a conducting frame 49 secured to the door assembly 43, a peripherally extending flange 48 carried by the door assembly 43 and positioned between the frame 49 and wall 23 being provided with a plurality of alternating conductive members 69, 70 which extend to different extents in the direction of microwave energy leakage so that the choke cavity 61 will suppress microwaves of more than one frequency. The distance from a short circuiting wall surface 63 of choke cavity 61 to the origin of energy escaping through gap 60 is #/2 at the main operating frequency of the oven so that a short circuit is reflected at gap 60 and a high series reactance is provided at choke opening 62. By castellating flange 48 at 69, 70 as shown, harmonics or spurious sideband frequencies may be suppressed as well as the main frequency. This construction also obviates detuning of the choke as the result of normal wear and tear on the oven and due to slight opening of the oven door. Dielectric material 66, e.g. polystyrene or polythene fills the choke cavity 61 and the transmission path 59. Secondary radiation absorption bodies 67, 68 comprising rubber or plastics loaded with carbon derivatives or ferrites are provided between the door and access opening. The oven door has a perforated metal plate 46, 47 covered by a transparent window 52. The usual mode stirrer, timers and safety interlock switches are provided. In Fig. 6, not shown, the flange 48 has castellations of three different sizes in the direction of energy escape to suppress three frequencies of radiation. In Fig. 6A (not shown) the castellations suppress fundamental and second harmonic frequencies, the width and dimension in the direction of energy escape of the second harmonic castellations being half that of the fundamental frequency castellations. In Figs. 9 and 6B (not shown), different length castellations are separated by slots which inhibit the propagation of higher order peripheral modes, as in U.K. Specification 1,417,156 (Raytheon Co.).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35654673A | 1973-05-02 | 1973-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1465106A true GB1465106A (en) | 1977-02-23 |
Family
ID=23401899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1913074A Expired GB1465106A (en) | 1973-05-02 | 1974-05-01 | Microwave heating apparatus |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5015142A (en) |
| BE (1) | BE814355A (en) |
| CA (1) | CA1008509A (en) |
| CH (1) | CH573089A5 (en) |
| DE (1) | DE2420973A1 (en) |
| FR (1) | FR2228341A1 (en) |
| GB (1) | GB1465106A (en) |
| IT (1) | IT1011268B (en) |
| NL (1) | NL7405754A (en) |
| ZA (1) | ZA742105B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2308796A (en) * | 1995-12-29 | 1997-07-02 | Lg Electronics Inc | Microwave door seal |
| WO2000036878A1 (en) * | 1998-12-17 | 2000-06-22 | Whirlpool Corporation | Microwave oven with microwave seal |
| US8207479B2 (en) | 2006-02-21 | 2012-06-26 | Goji Limited | Electromagnetic heating according to an efficiency of energy transfer |
| US8492686B2 (en) | 2008-11-10 | 2013-07-23 | Goji, Ltd. | Device and method for heating using RF energy |
| US9167633B2 (en) | 2006-02-21 | 2015-10-20 | Goji Limited | Food preparation |
| US9215756B2 (en) | 2009-11-10 | 2015-12-15 | Goji Limited | Device and method for controlling energy |
| US10425999B2 (en) | 2010-05-03 | 2019-09-24 | Goji Limited | Modal analysis |
| US10674570B2 (en) | 2006-02-21 | 2020-06-02 | Goji Limited | System and method for applying electromagnetic energy |
| WO2023046447A1 (en) * | 2021-09-23 | 2023-03-30 | BSH Hausgeräte GmbH | Cooking chamber door for a microwave oven and microwave oven |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1054231A (en) * | 1975-03-31 | 1979-05-08 | Arnold M. Bucksbaum | Microwave oven door seal system of resonant transmission line structure |
| AU518080B2 (en) * | 1977-11-25 | 1981-09-10 | Raytheon Company | Primary choke system |
| DE2811941C2 (en) * | 1978-03-18 | 1982-04-01 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Door for the oven compartment of a microwave oven |
| DE3106786A1 (en) * | 1981-02-24 | 1982-09-09 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Microwave heating apparatus |
| WO1984001083A1 (en) * | 1982-08-25 | 1984-03-15 | Matsushita Electric Ind Co Ltd | Radio-wave sealing device |
| US4689460A (en) * | 1985-01-04 | 1987-08-25 | Tdk Corporation | Absorber device for microwave leakage |
| GB2196520B (en) * | 1986-08-07 | 1990-01-04 | Hitachi Heating Appl | Microwave heating apparatus |
-
1974
- 1974-04-02 ZA ZA00742105A patent/ZA742105B/en unknown
- 1974-04-22 IT IT50542/74A patent/IT1011268B/en active
- 1974-04-29 FR FR7414875A patent/FR2228341A1/fr not_active Withdrawn
- 1974-04-29 NL NL7405754A patent/NL7405754A/xx not_active Application Discontinuation
- 1974-04-29 BE BE143754A patent/BE814355A/en unknown
- 1974-04-30 DE DE2420973A patent/DE2420973A1/en not_active Withdrawn
- 1974-05-01 GB GB1913074A patent/GB1465106A/en not_active Expired
- 1974-05-01 CA CA198,629A patent/CA1008509A/en not_active Expired
- 1974-05-02 JP JP49048888A patent/JPS5015142A/ja active Pending
- 1974-05-02 CH CH600574A patent/CH573089A5/xx not_active IP Right Cessation
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2308796A (en) * | 1995-12-29 | 1997-07-02 | Lg Electronics Inc | Microwave door seal |
| WO2000036878A1 (en) * | 1998-12-17 | 2000-06-22 | Whirlpool Corporation | Microwave oven with microwave seal |
| US6538241B1 (en) * | 1998-12-17 | 2003-03-25 | Whirlpool Corporation | Microwave oven with microwave seal |
| AU759860B2 (en) * | 1998-12-17 | 2003-05-01 | Whirlpool Corporation | Microwave oven with microwave seal |
| US10492247B2 (en) | 2006-02-21 | 2019-11-26 | Goji Limited | Food preparation |
| US10080264B2 (en) | 2006-02-21 | 2018-09-18 | Goji Limited | Food preparation |
| US8759729B2 (en) | 2006-02-21 | 2014-06-24 | Goji Limited | Electromagnetic heating according to an efficiency of energy transfer |
| US8941040B2 (en) | 2006-02-21 | 2015-01-27 | Goji Limited | Electromagnetic heating |
| US9040883B2 (en) | 2006-02-21 | 2015-05-26 | Goji Limited | Electromagnetic heating |
| US9078298B2 (en) | 2006-02-21 | 2015-07-07 | Goji Limited | Electromagnetic heating |
| US9167633B2 (en) | 2006-02-21 | 2015-10-20 | Goji Limited | Food preparation |
| US11729871B2 (en) | 2006-02-21 | 2023-08-15 | Joliet 2010 Limited | System and method for applying electromagnetic energy |
| US11523474B2 (en) | 2006-02-21 | 2022-12-06 | Goji Limited | Electromagnetic heating |
| US11057968B2 (en) | 2006-02-21 | 2021-07-06 | Goji Limited | Food preparation |
| US9872345B2 (en) | 2006-02-21 | 2018-01-16 | Goji Limited | Food preparation |
| US10674570B2 (en) | 2006-02-21 | 2020-06-02 | Goji Limited | System and method for applying electromagnetic energy |
| US8207479B2 (en) | 2006-02-21 | 2012-06-26 | Goji Limited | Electromagnetic heating according to an efficiency of energy transfer |
| US8492686B2 (en) | 2008-11-10 | 2013-07-23 | Goji, Ltd. | Device and method for heating using RF energy |
| US10687395B2 (en) | 2008-11-10 | 2020-06-16 | Goji Limited | Device for controlling energy |
| US9374852B2 (en) | 2008-11-10 | 2016-06-21 | Goji Limited | Device and method for heating using RF energy |
| US11653425B2 (en) | 2008-11-10 | 2023-05-16 | Joliet 2010 Limited | Device and method for controlling energy |
| US10405380B2 (en) | 2009-11-10 | 2019-09-03 | Goji Limited | Device and method for heating using RF energy |
| US10999901B2 (en) | 2009-11-10 | 2021-05-04 | Goji Limited | Device and method for controlling energy |
| US9609692B2 (en) | 2009-11-10 | 2017-03-28 | Goji Limited | Device and method for controlling energy |
| US9215756B2 (en) | 2009-11-10 | 2015-12-15 | Goji Limited | Device and method for controlling energy |
| US10425999B2 (en) | 2010-05-03 | 2019-09-24 | Goji Limited | Modal analysis |
| WO2023046447A1 (en) * | 2021-09-23 | 2023-03-30 | BSH Hausgeräte GmbH | Cooking chamber door for a microwave oven and microwave oven |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6753074A (en) | 1975-10-16 |
| CH573089A5 (en) | 1976-02-27 |
| ZA742105B (en) | 1975-03-26 |
| BE814355A (en) | 1974-08-16 |
| FR2228341A1 (en) | 1974-11-29 |
| IT1011268B (en) | 1977-01-20 |
| NL7405754A (en) | 1974-11-05 |
| CA1008509A (en) | 1977-04-12 |
| JPS5015142A (en) | 1975-02-18 |
| DE2420973A1 (en) | 1974-11-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |