CN1404092A - Magnetron - Google Patents
Magnetron Download PDFInfo
- Publication number
- CN1404092A CN1404092A CN02142143A CN02142143A CN1404092A CN 1404092 A CN1404092 A CN 1404092A CN 02142143 A CN02142143 A CN 02142143A CN 02142143 A CN02142143 A CN 02142143A CN 1404092 A CN1404092 A CN 1404092A
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- China
- Prior art keywords
- mentioned
- cathode leg
- metal container
- cylindrical metal
- insulator sleeve
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/14—Leading-in arrangements; Seals therefor
- H01J23/15—Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/865—Vacuum locks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/32—Sealing leading-in conductors
- H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
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- Microwave Tubes (AREA)
Abstract
A cathode 13 with a filament 14 arranged at a center axis part of an anode 18 is supported by a pair of cathode leads 17, a pair of magnetic pole pieces 19 with a through-hole 19a formed at around the center are arranged at both ends of the anode 8, an opening 24b at one end of a cylindrical metal container 24 is joined airtightly with a junction face formed at a stem insulating body 21, a circular brim part 24c set in extension at the side of the cathode leads 17 is formed at the opening 24b, and a bottom face 26a of the stem insulating body 21 is to be covered with the brim part 24c. To surely prevent discharge generated between a junction part of a stem insulating body with a cylindrical metal container and cathode leads.
Description
Technical field
The present invention relates to be installed in the magnetron of the generation microwave of microwave oven.
Background technology
The cathode portion of magnetron for microwave oven in the past is for example to put down in writing at the fair 7-62979 communique of spy (H01J 23/14, H01J 9/24, H01J 23/12), the two ends of the filament of being made by thorium tungsten are separately fixed at the pair of end box, are fixed with the cathode leg of being made by molybdenum (Mo) etc. in this end box.These cathode legs pass the insulator sleeve through hole and extend to the outside, and the tubular canister solder brazing of fixed anode one end is arranged on the metallising face of the periphery of insulator sleeve.And the two ends of anode are furnished with a pair of pole piece that central part has through hole, and the magnetic force of magnet not shown in the figures is directed near the filament.
In the magnetron of this spline structure, general and anodic bonding all-in-one-piece cylindrical metal container is an earthing potential, in contrast, add negative voltage on the negative electrode that constitutes by filament, cathode leg etc., as the 4kV high-tension electricity, on above-mentioned cathode axis, apply magnetic field, and for from the filament ejected electron and galvanization, electron cyclotron then, microwave is emitted in the high-frequency electric field synchronized oscillation of electronics that this circles round and anode.During this oscillatory work, metal object from the surface evaporation thorium of filament, tungsten etc., so these metal objects by the through hole of pole piece, attached to the bottom of insulator sleeve, little by little reduce the composition surface of cylindrical metal container and the insulation resistance between the cathode leg.
So, use in the microwave oven of leakage transformer, not preheating filament and turn-on power then in the initial stage of ejected electron not, are coupled with the non-loaded voltage of 8～10kV on magnetron, the insulation resistance of the composition surface of cylindrical metal container and cathode leg reduces, then, by the bottom surface of insulator sleeve, discharge between the composition surface of cylindrical metal container and the cathode leg, cause the overvoltage ripple, have the problem of destroying the high pressure part.
Summary of the invention
The object of the present invention is to provide the magnetron of the discharge that takes place between a kind of junction surface of the canister that effectively prevents insulator sleeve and the cathode leg.
Magnetron of the present invention comprises: an end opening portion sealed engagement forms the cylindrical metal container of a vacuum tank part at anode; Be arranged in above-mentioned anode two ends, central part has the pole piece of a pair of through hole; Support above-mentioned anodes centre axial region and be furnished with a pair of cathode leg of the negative electrode of filament; The insulator sleeve of the through hole of this cathode leg is passed in formation, it is characterized in that: the other end peristome sealed engagement of above-mentioned cylindrical metal container is being formed at above-mentioned insulator sleeve composition surface on every side, and above-mentioned other end peristome forms the eaves portion cylindraceous (flanging portion) of extending to above-mentioned cathode leg one side.
According to said structure, add negative voltage on the above-mentioned negative electrode, for example during the 4kV high pressure, apply magnetic field on the above-mentioned cathode axis, the electric current that makes above-mentioned filament ejected electron by the time, electron cyclotron, microwave is emitted in the high-frequency electric field synchronized oscillation of this circulating electrons and anode.
So, during oscillatory work, even metal object from the thorium of for example above-mentioned filament composition of raw material of surface evaporation of above-mentioned filament, tungsten etc., because of the bottom surface of above-mentioned insulator sleeve is covered by above-mentioned eaves portion, on this bottom surface, be not easy to adhere to the metal object of thorium, tungsten etc., can suppress the composition surface of above-mentioned cylindrical metal container and the reduction of the insulation resistance between the above-mentioned cathode leg.Thereby above-mentioned negative electrode is in the initial stage of ejected electron, even apply the non-load voltage of 8～10kV on above-mentioned negative electrode, also can prevent to discharge between the composition surface of above-mentioned cylindrical metal container and the above-mentioned cathode leg.
Also have, the inner side that the inner periphery portion of above-mentioned eaves portion is positioned at than above-mentioned pole piece through hole is a feature, therefore, even enter from through hole such as the metal object of the thorium of above-mentioned filament surface evaporation, tungsten etc. by pole piece,, above-mentioned eaves portion covers the bottom surface of above-mentioned insulator sleeve because reaching the inboard of above-mentioned pole piece central authorities, at least can the adhesion metal thing in the bottom surface in the above-mentioned through hole outside, thereby can prevent to discharge between the composition surface of above-mentioned cylindrical metal container and the above-mentioned cathode leg.
Also have, above-mentioned insulator sleeve is that the formation recess is a feature between above-mentioned composition surface and above-mentioned cathode leg, so the distance along face between the composition surface of above-mentioned cylindrical metal container and the cathode leg is elongated, increase the insulation resistance, can prevent to discharge between the composition surface of above-mentioned cylindrical metal container and the cathode leg.
In addition, magnetron comprises an end opening portion sealed engagement at anode, forms the cylindrical metal container of a vacuum tank part; Be arranged in above-mentioned anode two ends, central part has the pole piece of a pair of through hole; Support above-mentioned anodes centre axial region and be furnished with a pair of cathode leg of the negative electrode of filament; Form insulator sleeve by the through hole of this cathode leg, it is characterized in that: the other end peristome sealed engagement of above-mentioned cylindrical metal container is being formed at above-mentioned insulator sleeve composition surface on every side, form recess between above-mentioned composition surface and the above-mentioned cathode leg, the other end peristome of above-mentioned cylindrical metal container forms the bending part that inserts above-mentioned recess.
According to said structure, even metal object from the surface evaporation thorium of filament, tungsten etc., because above-mentioned bending part covers the wall of above-mentioned recess, on this wall, be not easy to adhere to the metal object of thorium, tungsten etc., can suppress the composition surface of above-mentioned cylindrical metal container and the reduction of the insulation resistance between the above-mentioned cathode leg.Thereby,,, also can prevent to discharge between the composition surface of above-mentioned cylindrical metal container and the cathode leg even be coupled with the non-load voltage of 8～10kV in the above-mentioned negative electrode initial stage of ejected electron not.
Also have, the bottom surface that above-mentioned bending part is close to above-mentioned recess is a feature, and therefore, above-mentioned joggling part covers the whole wall of above-mentioned recess, metal object can be attached to wall, can reliably prevent to discharge between the composition surface of above-mentioned cylindrical metal container and the cathode leg.
Description of drawings
Fig. 1 is the sectional arrangement drawing of the magnetron major part of the expression embodiment of the invention 1.
Fig. 2 is the sectional arrangement drawing of same major part.
Fig. 3 is the drawing in side sectional elevation of same major part.
Fig. 4 is the vertical view of same insulator sleeve.
Fig. 5 is the figure of other embodiment of expression insulator sleeve.
Fig. 6 is the sectional arrangement drawing of the major part of the embodiment of the invention 2.
Among the figure, 24a: an end opening portion, 5: anode, 24: cylindrical metal container, 19a: the through hole of pole piece, 19: pole piece, 14: filament, 13: negative electrode, 17: cathode leg, 21: insulator sleeve, 24b: other end peristome, 25: composition surface, 24c: eaves portion (flanging portion), 26: recess, 27c: bending part.
Embodiment
Embodiment 1
Describe embodiments of the invention 1 with reference to the accompanying drawings in detail.
Fig. 1 is the sectional arrangement drawing of the magnetron major part of the expression embodiment of the invention 1, Fig. 2 is the sectional arrangement drawing of same major part, Fig. 3 is the drawing in side sectional elevation of same major part, and Fig. 4 is the upper surface figure with insulator sleeve, and Fig. 5 is the figure of other embodiment of expression insulator sleeve.
The 1st, the main part of the magnetron of the vacuum diode that is capped by frame 2 and fin 3.
The 4th, the inner installation for the electric capacity 5 of noise suppression and the housing of choke 6 is adjacent to mounting cover 7 so that noise is not missed to the outside on the peristome of this housing 4.
The 8th, the anode of magnetron, this anode 8 is formed by oxygen-free copper, utilize to form the vacuum wall part of aforementioned body portion 1 anode cylinder 9, the radial blade 10 that is located at the even number of these anode cylinder 9 inside, this blade 10 is connected with major diameter (outside) homopolarity clamping ring 12 every a slice (inboard) homopolarity clamping ring 11 with minor diameter, vibrate with stable π oscillating membrane.
The 13rd, the negative electrode that thorium is about 1%, other two ends for the filament 14 of tungsten composition utilize recessed cap head 15 and 16 clampings of limit cap, this negative electrode 13 is supported by a pair of cathode leg 17.
18 are provided in a side of the upper and lower circular permanent magnet of above-mentioned anode 8.
The 19th, central portion is provided with the pole piece of through hole 19a, and this pole piece 19 is located at the below of above-mentioned permanent magnet 18, and the magnetic field concentration that makes above-mentioned permanent magnet 18 is at the front end of above-mentioned blade 10 and the action space between the above-mentioned negative electrode 13.
The 20th, by the external lug that metal alloy is made, this external lug 20 is inserted in the insulator sleeve 21 that above-mentioned cathode leg 17 solderings will be narrated in the back, the power supply of said external joint 20 and from above-mentioned filament 14 radiation hot electrons.At this moment, the temperature of above-mentioned filament 14 is greatly about 1800 ℃ high temperature, from the metal object of the surface evaporation thorium of above-mentioned filament 14, tungsten etc.
The 21st, by the resistant to elevated temperatures insulator sleeve that the aluminium pottery is made, the through hole 21a that forms on this insulator sleeve goes up and inserts above-mentioned cathode leg 17.
21b is the skewed notch part that the edge part of above-mentioned insulator sleeve 21 forms, and this skewed notch part 21b is detected transducer 22 and surveys, and makes said external joint 20 location.By such structure, external lug 20 is positioned untouchablely, position compared with the contact external lug, when fault is arranged, apply unusual power on the said external joint 20, can not make external lug 20 distortion, therefore, reliably carry out power supply to external lug 20.Also have, detect, except constituting above-mentioned skewed notch part 21b, as shown in Figure 5, also might as well form groove 23 at the edge part of above-mentioned insulator sleeve 21 in order to make above-mentioned acquisition sensor 22.
The 24th, the 24a of portion is bonded on anode 8 the one end opening, being formed at above-mentioned insulator sleeve 21 composition surface 25 on every side, is the other end peristome 24b soldering cylindrical metal container of sealed engagement.So, on above-mentioned other end peristome 24b, forming the circle-shaped eaves 24c of portion that extends to above-mentioned cathode leg 17, the inner periphery portion that makes this circle-shaped eaves 24c of portion stretches out to the inside than the through hole 19a of above-mentioned pole piece 19.Because such structure, even from the metal object of the surface evaporation thorium of filament 14, tungsten etc. and enter from through hole 19a, because of the above-mentioned eaves 24c of portion covers the bottom surface 26a of recess 26 described later, the metal object in that bottom surface 26a is not easy to adhere to thorium, tungsten etc. suppresses the reduction of insulation resistance.
The 26th, the recess that forms between the composition surface 25 of above-mentioned cylindrical metal container 24 and the cathode leg 17, because this recess 26, the composition surface 25 of above-mentioned cylindrical metal container 24 is elongated with the creepage distance of above-mentioned cathode leg 17, the discharge of generation between the composition surface 25 that can suppress above-mentioned cylindrical metal container 24 and the above-mentioned cathode leg 17.
By above-mentioned structure, add negative voltage on the above-mentioned negative electrode 13, the high-tension electricity of 4kV for example, also from 20 power supplies of said external joint, make the electric current of filament 14 by 10A, then, by the magnetic field of permanent magnet 18, from the electron cyclotron that filament 14 is emitted, microwave is emitted in the high-frequency electric field synchronized oscillation of this circulating electrons and anode 8.
So, when work, even metal object from filament 14 evaporation thoriums, tungsten etc., because the above-mentioned eaves 24c of portion covers the bottom surface 26a of above-mentioned insulator sleeve 21, metal object in that bottom surface 26a is not easy to adhere to thorium, tungsten etc. can suppress the reduction of the insulation resistance between above-mentioned cylindrical metal container 24 and the above-mentioned cathode leg 17.Thereby, at above-mentioned negative electrode 13 not in the initial stage of ejected electron,, also can prevent from discharge between cylindrical metal container 24 composition surfaces 25 and the cathode leg 17 to take place by above-mentioned bottom surface 26a even be coupled with the non-load voltage of 8～10kV at negative electrode 13.
Also have, even the through hole 19a by above-mentioned pole piece 19 enters from the metal object of the thorium of the surface evaporation of above-mentioned filament 14, tungsten etc., because above-mentioned through hole 19a stretches out in the inner periphery portion of the above-mentioned eaves 24c of portion, cover the bottom surface 21a of above-mentioned insulator sleeve 21, at least can the adhesion metal thing, can prevent to discharge between the composition surface 25 of above-mentioned cylindrical metal container 24 and the above-mentioned cathode leg 17 than the bottom surface 21a in the above-mentioned through hole 19a outside.
And then, because above-mentioned insulator sleeve 21 is to form above-mentioned recess 26 between above-mentioned composition surface 25 and above-mentioned cathode leg 17, the composition surface 25 of above-mentioned cylindrical metal container 24 and the creepage distance between the above-mentioned cathode leg 17 are elongated and increase the insulation resistance, can reliably prevent to discharge between the composition surface 25 of above-mentioned cylindrical metal container 24 and the above-mentioned cathode leg 17.
Embodiment 2
Below, embodiments of the invention 2 are described with reference to the accompanying drawings.Enclose identical number for the above embodiments 1 identical structure, omit its explanation.
Fig. 6 is the sectional arrangement drawing of the major part of embodiments of the invention 2.
The 27th, one end 27a is bonded on anode 8 and other end 27b be formed on composition surface 25 soldered joint around the above-mentioned insulator sleeve 21 and the cylindrical metal container of sealed engagement.
27c is formed in cylindrical metal container 27, and to the bending part of the bottom surface of above-mentioned recess 26 26a near bending, this bending part 27c covers the bottom surface 26a of whole above-mentioned recess 26 and forms from above-mentioned other end peristome 27b.By such structure, even metal object from the surface evaporation thorium of above-mentioned filament 14, tungsten etc., because above-mentioned bending part 27c covers the wall 26b of whole above-mentioned recess 26, on this wall 26b, can not adhere to the metal object of thorium, tungsten etc., suppress the composition surface 25 of above-mentioned cylindrical metal container 27 and the reduction of the insulation resistance between the above-mentioned cathode leg 17.
Because said structure, during work, even from the metal object of the surface evaporation thorium of above-mentioned filament 14, tungsten etc., because above-mentioned bending part 27c covers the wall 26b of whole above-mentioned recess 26, the metal object that is not easy to adhere to thorium, tungsten etc. on this wall 26b suppresses the reduction of insulation resistance.Thereby, at above-mentioned negative electrode 13 not in the initial stage of ejected electron,, also can prevent to discharge between the composition surface 25 of above-mentioned cylindrical metal container 27 and the above-mentioned cathode leg 17 even on negative electrode 13, added the non-load voltage of 8～10kV.
Also have, because above-mentioned bending part 27c is near the bottom surface 26a of above-mentioned recess 26, the wall 26b of above-mentioned recess 26 is covered by above-mentioned bending part 27c, in the metal object that above-mentioned wall 26b can not adhere to thorium, tungsten etc., can reliably prevent to discharge between the composition surface of above-mentioned cylindrical metal container 27 and the above-mentioned cathode leg 17.
According to the present invention 1, magnetron of the present invention comprises and is arranged in above-mentioned anode two ends, and central part has the pole piece of a pair of through hole; Support above-mentioned anodes centre axial region and be furnished with a pair of cathode leg of the negative electrode of filament; And the insulator sleeve that forms the through hole that passes through this cathode leg, the other end peristome sealed engagement of above-mentioned cylindrical metal container is being formed at above-mentioned insulator sleeve composition surface on every side, form the eaves cylindraceous portion of extending to above-mentioned cathode leg one side at above-mentioned other end peristome, therefore, even metal object from the surface evaporation thorium of above-mentioned filament, tungsten etc., the bottom surface of above-mentioned insulator sleeve is covered by above-mentioned eaves portion, in the metal object that this bottom surface is not easy to adhere to thorium, tungsten etc., the reduction of the resistance that can suppress to insulate.Thereby, at above-mentioned negative electrode not in the initial stage of ejected electron,, can obtain to prevent to take place between the composition surface of above-mentioned cylindrical metal container and the above-mentioned cathode leg effect of discharge even added the non-load voltage of 8～10kV at above-mentioned negative electrode.
According to the present invention 2, the inner periphery portion of above-mentioned eaves portion is positioned at the inner side of the through hole of above-mentioned pole piece, even enter by the pole piece through hole from the metal object of the thorium of the surface evaporation of above-mentioned filament, tungsten etc.,, above-mentioned eaves portion covers the bottom surface of above-mentioned insulator sleeve because extending to the inboard of above-mentioned pole piece through hole, at least the metal object that can not adhere to thorium, tungsten etc. in the bottom surface in the above-mentioned through hole outside can obtain to prevent to take place between the composition surface of above-mentioned cylindrical metal container and the cathode leg effect of discharge.
According to the present invention 3, because above-mentioned insulator sleeve forms recess between above-mentioned composition surface and above-mentioned cathode leg, creepage distance is elongated and increase the insulation resistance between the composition surface of above-mentioned cylindrical metal container and the above-mentioned cathode leg, and the effect of discharging takes place between the composition surface that acquisition can reliably prevent above-mentioned cylindrical metal container and the above-mentioned cathode leg.
According to the present invention 4, magnetron of the present invention comprises and is arranged in above-mentioned anode two ends, and central part has the pole piece of a pair of through hole; Support above-mentioned anodes centre axial region and be furnished with a pair of cathode leg of the negative electrode of filament; Form insulator sleeve by the through hole of this cathode leg, the other end peristome sealed engagement of above-mentioned cylindrical metal container is being formed at above-mentioned insulator sleeve composition surface on every side, form recess between above-mentioned composition surface and the above-mentioned cathode leg, the other end peristome of above-mentioned cylindrical metal container is formed the bending part of getting involved above-mentioned recess, even metal object from filament surface evaporation thorium, tungsten etc., because the wall of above-mentioned recess is covered by above-mentioned bending part, in the metal object that this wall is not easy to adhere to thorium, tungsten etc., the reduction of the insulation resistance of drawing up.Thereby from the above-mentioned negative electrode initial stage of ejected electron not, even added the non-load voltage of 8～10kV on above-mentioned negative electrode, acquisition can prevent to take place between the composition surface of above-mentioned cylindrical metal container and the cathode leg effect of discharge.
According to the present invention 5, because above-mentioned bending part is close to the bottom surface of above-mentioned recess, the whole wall of above-mentioned recess is covered by above-mentioned bending part, and metal object can be attached to wall, therefore, can obtain to prevent to take place between the composition surface of above-mentioned cylindrical metal container and the cathode leg effect of discharge.
Claims (5)
1, a kind of magnetron comprises: an end opening portion sealed engagement forms the cylindrical metal container of a vacuum tank part at anode; Be arranged in above-mentioned anode two ends, and central part has the pole piece of a pair of through hole; Support above-mentioned anodes centre axial region and be furnished with a pair of cathode leg of the negative electrode of filament; And the insulator sleeve that forms the through hole that passes this cathode leg, it is characterized in that: the other end peristome sealed engagement of above-mentioned cylindrical metal container is on the composition surface that is being formed at around the above-mentioned insulator sleeve, forms the eaves cylindraceous portion of extending to above-mentioned cathode leg one side at above-mentioned other end peristome.
2, magnetron according to claim 1 is characterized in that: the inner periphery portion of above-mentioned eaves portion is positioned at the position than the through hole inside of above-mentioned pole piece.
3, magnetron according to claim 1 and 2 is characterized in that: above-mentioned insulator sleeve forms recess between above-mentioned composition surface and above-mentioned cathode leg.
4, a kind of magnetron comprises: an end opening portion sealed engagement forms the cylindrical metal container of a vacuum tank part at anode; Be arranged in above-mentioned anode two ends, and central part has the pole piece of a pair of through hole; Support above-mentioned anodes centre axial region and be furnished with a pair of cathode leg of the negative electrode of filament; The insulator sleeve of the through hole of this cathode leg is passed in formation, it is characterized in that: the other end peristome sealed engagement of above-mentioned cylindrical metal container is being formed at above-mentioned insulator sleeve composition surface on every side, form recess between above-mentioned composition surface and the above-mentioned cathode leg, make the other end peristome of above-mentioned cylindrical metal container form the bending part of getting involved to above-mentioned recess.
5, magnetron according to claim 4 is characterized in that: the bottom surface that above-mentioned bending part is close to above-mentioned recess.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001262940 | 2001-08-31 | ||
| JP2001262940A JP2003077401A (en) | 2001-08-31 | 2001-08-31 | Magnetron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1404092A true CN1404092A (en) | 2003-03-19 |
| CN1187783C CN1187783C (en) | 2005-02-02 |
Family
ID=19089768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021421439A Expired - Fee Related CN1187783C (en) | 2001-08-31 | 2002-08-28 | Magnetron |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2003077401A (en) |
| KR (1) | KR100487937B1 (en) |
| CN (1) | CN1187783C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521079B (en) * | 2007-11-02 | 2012-11-14 | 英国西门子公司 | Current leadthrough for cryostat |
| CN104619059A (en) * | 2014-12-19 | 2015-05-13 | 西南交通大学 | Magnetron cathode cable microwave leakage protective device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2447977B (en) * | 2007-03-30 | 2011-08-10 | E2V Tech | Magnetrons |
| CN111952136A (en) * | 2019-05-17 | 2020-11-17 | 核工业西南物理研究院 | High-power microwave vacuum tube cathode and filament connector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56107451A (en) * | 1980-01-30 | 1981-08-26 | Nec Home Electronics Ltd | Stem for magnetron |
| JPH0752626B2 (en) * | 1985-10-25 | 1995-06-05 | 株式会社東芝 | Magnetron for microwave oven |
| JPH0432133A (en) * | 1990-05-25 | 1992-02-04 | Hitachi Ltd | Cathode support body structure of magnetron |
| JP3363619B2 (en) * | 1994-11-01 | 2003-01-08 | 三洋電機株式会社 | Magnetron |
-
2001
- 2001-08-31 JP JP2001262940A patent/JP2003077401A/en not_active Withdrawn
-
2002
- 2002-08-27 KR KR10-2002-0050786A patent/KR100487937B1/en not_active IP Right Cessation
- 2002-08-28 CN CNB021421439A patent/CN1187783C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521079B (en) * | 2007-11-02 | 2012-11-14 | 英国西门子公司 | Current leadthrough for cryostat |
| CN104619059A (en) * | 2014-12-19 | 2015-05-13 | 西南交通大学 | Magnetron cathode cable microwave leakage protective device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030019137A (en) | 2003-03-06 |
| KR100487937B1 (en) | 2005-05-06 |
| JP2003077401A (en) | 2003-03-14 |
| CN1187783C (en) | 2005-02-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050202 Termination date: 20160828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |