US2635207A - Electron discharge device of the cavity resonator type - Google Patents
Electron discharge device of the cavity resonator type Download PDFInfo
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- US2635207A US2635207A US198612A US19861250A US2635207A US 2635207 A US2635207 A US 2635207A US 198612 A US198612 A US 198612A US 19861250 A US19861250 A US 19861250A US 2635207 A US2635207 A US 2635207A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
- H01J25/22—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone
- H01J25/24—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection
Definitions
- This invention relates to electron discharge devices and, more particularly, to reflex oscillators of the cavity resonator type.
- the electrodes which comprise the cathode gun assembly must be accurately aligned and be positioned within very close requirements. This requires the critical spacing and alignment of the cathode surface, the beam electrode, and the focusing electrode. Any rotational inaccuracy, such as a tilt of even one degree, in the cathode or any displacement of the cathode or the beam electrode, such as of the order of .003 or .005 inch, from the axial alignment of the focusing electrode will considerably reduce the percentage of emitted electrons directed through the small aperture into the cavity resonator.
- a further object of this invention is to accurrately align and position the electrodesy and elements of the electron gun assembly required for devices intended for extremely high frequency operation.
- a further object of this invention is to reduce the number of dimensional tolerances introduced into the alignment and positioning of the elements of the electron gun assembly and, more particularly, to reduce the number of tolerances that must be accurately kept on any one of these elements.
- a still further object of this invention is to facilitate the assemblying of the electron gun and, more particularly, to do so by eliminating the use of assembling jigs and the concomitant introduction of dimensional errors because of the tolerances inherent in the jigs themselves.
- the focusing electrode is provided with an accurately determined external diameter and a ridge internal to that diameter and extending further along the axis of the electrode.
- An insulating ring of precise thickness surrounds this ridge and ts loosely on the focusing electrode.
- a larger insulating member with an accurately determined inner diameter ts snugly over the accurately determined external diameter of the focusing electrode.
- a beam or beam forming electrode is provided with a plurality of thin lingers fitting directly onto the cathode sleeve to which the other portions of the cylindrical beam electrode are adjacent. The cathode sleeve diameter and the inner diameter of the cylindrical beam electrode are accurately determined.
- the beam electrode fits into the accurately determined inner ring of the larger insulator, the outer diameter of the beam electrode fitting snugly into the insulator ring.
- Spring means bear againstthe beam electrode and bias it towards the focusing electrode.
- the various components of the electron gun assembly are thus all supported by each other in a single unit.
- each of the components of the electron gun assembly positions and aligns other components of the assembly without the use of external jigging or aligning means.
- each component part f the electron gun assembly are reduced to a minimum and, more particularly, that each part has only a single critical dimension, which may be accurately determined in the machining of the parts.
- the beam forming electrode is secured directlyto the cathode by means of a plurality of thin fingers, the beam electrode thus supporting the cathode inthe cathode gun assembly. Further, as the only thermal contact between the two is made by these fingers extending onto the cathode sleeve, the beam electrode can be maintained cooler than the cathode.
- the small insulator ring 31 is advantageously first dropped around the circular ridge 3l on the focusing electrode 28.
- the large insulator ring 36 may then be dropped around the portion 30 of the focusing electrode 28, the ring 36 fitting closely around the outer surface 29 of the portion 30.
- the beam electrode 38 is secured as by welding at the fingers to the cathode sleeve 42, the fingers 39 extending along the sleeve and supporting it.
- the main body of the beam electrode 38 itself is, however, advantageously not in contact with the sleeve 42, as explained more fully below.
- the beam electrode 38 to which the cathode sleeve 42 is attached is then advantageously placed into the central aperture in the large insulator ring 36, the inner edge of the beam electrode 38 resting on the small insulator ring 31 which accurately positions it from the focusing electrode 25.
- this central aperture in the large insulator ring 36 has been accurately machined or otherwise dimensioned to fit closely over the surface 29 of the portion 30 of the focusing electrode 28, the beam electrode 38 is accurately positioned in axial alignment with the focusing electrode 28.
- ⁇ It is to be particularly noted that not only is no external jigging required to center or position any of the components of the gun assembly, but further that none of the elements are welded or otherwise permanently secured to another element, except thatthe beam electrode fingers 39 may advantageously be welded to the cathode sleeve 42. However, the fingers 39 are so short that any deformation from this cause is minimized. This obviates the appearance of any stresses in the assembly due to the welding, or
- the cathode sleeve 42 advantageously is held only by the fingers 39.
- the cathode sleeve is thus held adjacent the ⁇ emitting surface 43 by a plurality of fingers extending along the outer surface of the sleeve,
- the possibility of objectionable tilting of the cathode surface 43 is greatly reduced. Further by accurately dimensioning the outer surface of the cathode sleeve 42 and the inner surface of the beam electrode 38, i. e., of the electrode and liu its fingers 39, axial alignment of the cathode sleeve 42 with the focusing electrode 28 is also assured.
- the beam electrode 38 is advantageously of Ni1var, a nickel-iron alloy, or other metallic material having a low thermal conductivity
- the spider spring 43 is advantageously of a nickelchromium-iron alloy known as Inconel X,stain less steel, or other metallic spring material having a higher thermal conductivity.
- focusing electrode the outer surfaces of said beam electrode and said focusing electrode being aligned, insulating means closely fitting around said aligned outer surfaces and positioning said cathode sleeve, beam electrode, and focusing electrode in axial alignment, and means locking said electrodes and said insulating means in a unitary assembly.
- An electron gun assembly comprising "a cylindrical cathode sleeve having an electron emitting surface at one end, a beam electrode having a plurality of fingers extending along said cathode sleeve adjacent said emitting surface,
- first insulating means closely fitting around said aligned outer surfaces and positioning said cathode sleeve, beam electrode, and focusing electrode in axial alignment
- second insulating means coaxial with said beam and focusing electrodes and insulating said electrodes from each other
- spring means biasing said lbeam electrode towards said focusing electrode, and means locking said spring means, said electrodes, and
- said* insulating means in' a', compact' unitaryV assembly.
- An electron gun assembly comprising.l ai
- cylindrical cathode sleevey having anl electron. emitting surface atyone end, a' beam ⁇ electrode positionedadjacent saidone end andzcoaxial with s-aidfsleeve, said-beam electrodehaving: a plurality, of .short lingers extending along said sleevev andfcomprising" the only contact between said:
- 415A electron discharge device comprising@ a. cylindrical cathode sleeve having an electron.
- a beam electrode positioned adjacentsaid one end and c'oaxial with said-cathode sleeve, said beam electroderhaving a' plurality-of 'ngers extending along said sleevef and* comprising the.
- An ⁇ electron discllargey device comprisingl aA focusing electrode having a cylindrical portion, a circular ridge extending from said portion and coaxial therewith, a first insulator ringy positioned around-said ridge, a cylindrical beam electrode bearing against said first ring and havingjtheisame outer diameter assaid portion, said beam electrode having a plurality of fingers extendingV therefrom Vand angesgintermediate,said fingers, a cylindrical cathode ⁇ sleeve adjacent said beam electrode, Asaidcathode sleeve havingv an felectron emitting'surface positioned towards said" focusing electrode, said fingers extending along said cathode sleeve, a second insulator ring closely encompassing said'portion and said beam electrode andpositioning said electrodes and said ⁇ focusing electrode positionedin said aperture and.
- said focusing electrode having a cylindrical portion extending behind said mounting member, a circular ridge coaxial with said cylindrical portion and extending. therefrom, a first insulating ring positioned around saidcridge, a'fhollowfrcylimirical beam eleca trode bearingagainstisaid first:insulatorzring'sandf.
- fingers compriseathefonly. thermal contactbe.a4 tween;,said cathode sleeve* and said'beam elec trode';
- An' electron dischargefdevice comprisingr'ai mounting vmember ⁇ having an aperture therein,. a focusing electrode positioned inA saidA aperture' and isecured ⁇ to said? mounting member, .a cavity: resonator Apositioned rto one side ofi said mounts.
- saidtfocusing'l electrode havingA an* aperture defining an entrance for electrons into saidi resonator, va cylindricali portion' extending' fron-[said focusing electrode away from said' resi-- onator; saidcylindrical ,por-tion' having a .circular ridge, a yfirst insulating ring having an accurately ⁇ determined thickness: positioned loosely around: said ridge, a hollow cylindrical beam electrode bearingagainst said first',l insulator ringandcoaxial with said cylindrical portion, the outer sure faces offsaid cylindrical portion and said beam electrodebeing aligned, ⁇ a cylindrical cathode* sleeveihaving a;concave Aelectron emissive surface towards said resonator; ⁇ said beam electrodehaving azplura'lityV of Ashort fingers integral therewith extending ⁇ along Isaid cathode sleeve and integral @anges intermediate said ngers, said fingers comprising the only
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Description
C. T. GODDARD ELECTRON DISCHARGE DEVICE OF THE CAVITY RESONATOR TYPE April 14, 1953 Flled Dec 1, 1950 April 14, 1953 c. T. GODDARD ELECTRON DISCHARGE DEVICE OF THE CAVITY RESONATOR TYPE 2 SHEETS-SHEET 2 Filed Dec. 1, 195o /N VEN To@ '6. 7.' GOOD/IRD A 7' TORNEI( Patented Apr. 14, 1953 ELECTRON DISCHARGE DEVICE OF THE CAVITY RESONATOR TYPE charles r. Goddard, Basaing Ridge, N. J., assigor to Bell Telephone Laboratories, Incorporated, New York, N. Y., a corporation of New York Application December 1, 1950, Serial No. 198,612
8 Claims.
This invention relates to electron discharge devices and, more particularly, to reflex oscillators of the cavity resonator type.
The trend of design in such reflex oscillators has been consistently to smaller wavelengths. The attainment of eliicent and satisfactory opjeration at extremely high frequencies and short wavelengths requires smaller dimensioned electrodes and very close spacings between the electrodes and between the electrodes and the other' an illustrative device being of the order of .023
inch. In order thatan advantageously high percentage of electrons emitted by the cathode may pass through this small area, the electrodes which comprise the cathode gun assembly must be accurately aligned and be positioned within very close requirements. This requires the critical spacing and alignment of the cathode surface, the beam electrode, and the focusing electrode. Any rotational inaccuracy, such as a tilt of even one degree, in the cathode or any displacement of the cathode or the beam electrode, such as of the order of .003 or .005 inch, from the axial alignment of the focusing electrode will considerably reduce the percentage of emitted electrons directed through the small aperture into the cavity resonator.
It is, therefore, one object of this invention that a very high percentage of electrons emitted from the cathode shall pass through the extremely small vaperture required for very high frequency operation and shall enter into the cavity resonator.
A further object of this invention is to accurrately align and position the electrodesy and elements of the electron gun assembly required for devices intended for extremely high frequency operation.
A further object of this invention is to reduce the number of dimensional tolerances introduced into the alignment and positioning of the elements of the electron gun assembly and, more particularly, to reduce the number of tolerances that must be accurately kept on any one of these elements.
A still further object of this invention is to facilitate the assemblying of the electron gun and, more particularly, to do so by eliminating the use of assembling jigs and the concomitant introduction of dimensional errors because of the tolerances inherent in the jigs themselves.
These and other objects of this invention are attained in one specific illustrative embodiment wherein the focusing electrode is provided with an accurately determined external diameter and a ridge internal to that diameter and extending further along the axis of the electrode. An insulating ring of precise thickness surrounds this ridge and ts loosely on the focusing electrode. A larger insulating member with an accurately determined inner diameter ts snugly over the accurately determined external diameter of the focusing electrode. A beam or beam forming electrode is provided with a plurality of thin lingers fitting directly onto the cathode sleeve to which the other portions of the cylindrical beam electrode are adjacent. The cathode sleeve diameter and the inner diameter of the cylindrical beam electrode are accurately determined. The beam electrode fits into the accurately determined inner ring of the larger insulator, the outer diameter of the beam electrode fitting snugly into the insulator ring. Spring means bear againstthe beam electrode and bias it towards the focusing electrode. In this embodiment, the various components of the electron gun assembly are thus all supported by each other in a single unit.
It is, therefore, one feature of this invention that each of the components of the electron gun assembly positions and aligns other components of the assembly without the use of external jigging or aligning means.
i It is a further feature of this invention that the required tolerances on each component part f the electron gun assembly are reduced to a minimum and, more particularly, that each part has only a single critical dimension, which may be accurately determined in the machining of the parts.
It is a further feature of this invention that the beam forming electrode is secured directlyto the cathode by means of a plurality of thin fingers, the beam electrode thus supporting the cathode inthe cathode gun assembly. Further, as the only thermal contact between the two is made by these fingers extending onto the cathode sleeve, the beam electrode can be maintained cooler than the cathode.
It is a further feature of this invention that all of the components of the electron gun assembly are supported together as a single unit by a single retaining means. A
It is a still further feature of this invention that the components of the electron gun assembly are maintained in proper position by. spring means. 1
A complete understanding of this invention and of the various features thereof may be gained from consideration of the following detailed description and the accompanying drawings, in which:
tioning of the elements of the electrongun'are substantially reduced. This can best be seen by reference to Fig. 3 and to one advantageous procedure of assembling the component parts of the unitary electron gun assembly, which will also demonstrate the facility with which the electron gunassembly can be commercially assembled under large scale production conditions.
The small insulator ring 31 is advantageously first dropped around the circular ridge 3l on the focusing electrode 28. The large insulator ring 36 may then be dropped around the portion 30 of the focusing electrode 28, the ring 36 fitting closely around the outer surface 29 of the portion 30. The beam electrode 38 is secured as by welding at the fingers to the cathode sleeve 42, the fingers 39 extending along the sleeve and supporting it. The main body of the beam electrode 38 itself is, however, advantageously not in contact with the sleeve 42, as explained more fully below. The beam electrode 38 to which the cathode sleeve 42 is attached is then advantageously placed into the central aperture in the large insulator ring 36, the inner edge of the beam electrode 38 resting on the small insulator ring 31 which accurately positions it from the focusing electrode 25. As this central aperture in the large insulator ring 36 has been accurately machined or otherwise dimensioned to fit closely over the surface 29 of the portion 30 of the focusing electrode 28, the beam electrode 38 is accurately positioned in axial alignment with the focusing electrode 28. The springs 48 and 5|, with theintervening insulator ring 50,
are then positioned in place, and the assembly locked by bending over aplurality of the iingers 52 of the retaining member 53.
`It is to be particularly noted that not only is no external jigging required to center or position any of the components of the gun assembly, but further that none of the elements are welded or otherwise permanently secured to another element, except thatthe beam electrode fingers 39 may advantageously be welded to the cathode sleeve 42. However, the fingers 39 are so short that any deformation from this cause is minimized. This obviates the appearance of any stresses in the assembly due to the welding, or
.other securing operations, which could be poit is highly desirable that the possibility of rejection of a device as not meeting the required commercial standards for these causes be reduced.
The cathode sleeve 42, as discussed above, advantageously is held only by the fingers 39. As
the cathode sleeve is thus held adjacent the` emitting surface 43 by a plurality of fingers extending along the outer surface of the sleeve,
the possibility of objectionable tilting of the cathode surface 43 is greatly reduced. Further by accurately dimensioning the outer surface of the cathode sleeve 42 and the inner surface of the beam electrode 38, i. e., of the electrode and liu its fingers 39, axial alignment of the cathode sleeve 42 with the focusing electrode 28 is also assured.
The beam electrode 38 is advantageously of Ni1var, a nickel-iron alloy, or other metallic material having a low thermal conductivity, While the spider spring 43 is advantageously of a nickelchromium-iron alloy known as Inconel X,stain less steel, or other metallic spring material having a higher thermal conductivity. By positioning the beam electrode 38 away from the cathode sleeve 42 to which it is only connected by the fingers 3S, heat is conducted to the beam electrode 38 only through the fingers 39. However, because of the relative thermal characteristics of the beam electrode 38 and the spider spring 48 this heat seeps away through the beam electrode iianges 40 to the spring and to the insulator 36 so that the beam electrode 38 itself remains relatively cool.
An idea of the dimensions involved in a specic embodiment of this invention employable in -a device operable at wavelengths of the order of 6 millimeters can be obtained from the following dimensions, which are, of course, only exemplary:
Inner diameter of ring 36--. .142 i .0005 inch Thickness of ring 31 .019 i .001 inch Diameter of cathode sleeve 42 .125 i .001 inch Outer diameter of focusing electrode portion 30 .140 i .0005 inch In accordance with one desirable feature of this invention, as discussed above, the other dimensions of these elements are not critical, therebyY making possible the accurately aligned electron gun assembly in accordance with this invention.
It is to be understood that the above-describedl cathode sleeve adjacent said emitting surface, a`
focusing electrode, the outer surfaces of said beam electrode and said focusing electrode being aligned, insulating means closely fitting around said aligned outer surfaces and positioning said cathode sleeve, beam electrode, and focusing electrode in axial alignment, and means locking said electrodes and said insulating means in a unitary assembly.
2. An electron gun assembly comprising "a cylindrical cathode sleeve having an electron emitting surface at one end, a beam electrode having a plurality of fingers extending along said cathode sleeve adjacent said emitting surface,
, a focusing electrode, the outer surfaces of said beam electrode and said focusing electrode being aligned. first insulating means closely fitting around said aligned outer surfaces and positioning said cathode sleeve, beam electrode, and focusing electrode in axial alignment, second insulating means coaxial with said beam and focusing electrodes and insulating said electrodes from each other, spring means biasing said lbeam electrode towards said focusing electrode, and means locking said spring means, said electrodes, and
said* insulating means in' a', compact' unitaryV assembly.
3. An electron gun assembly comprising.l ai
cylindrical cathode sleevey having anl electron. emitting surface atyone end, a' beam` electrode positionedadjacent saidone end andzcoaxial with s-aidfsleeve, said-beam electrodehaving: a plurality, of .short lingers extending along said sleevev andfcomprising" the only contact between said:
beam electrode andzsaid sleeve, .a focusing electrode' coaxial with said beam'electrode; the outer surfacesof saidy focusing electrode and ,said beamV electrodebeing aligned,l an insulatorring closely fitting around said aligned outer surfacesrv and` positioning said cathodesleeve, bearnxelectrode,
andV focusing-` electrodex in axialalignment, andiv means'locking said electrodes and said insulating means .in-a :compact unitary assembly;
415A electron discharge device comprising@ a. cylindrical cathode sleeve having an electron.
emittingsurface atfone end, a beam electrode positioned adjacentsaid one end and c'oaxial with said-cathode sleeve, said beam electroderhaving a' plurality-of 'ngers extending along said sleevef and* comprising the. only` contact :between said beam electrode and said sleeve, a focusing electrode coaxial'with said beam electrode, the outer` surfacesof said focusing electrode Iand saidbeainelectrode being aligned, a First insulator ring closely fitting around said aligned outer surfaces and positioning said cathode sleeve, beam electrode, and: focusing electrode in axial alignment, a second insulator ring positioned within said rst ring and substantially coaxial therewith, said secon'dgring'being between saidfbearn and said focusing electrodes, spring meansfbiasing saidr beam4 electrodetowards said focusing electrode, and meanslocking said spring means, said'electrodes, and said insulator` rings in a compact unitaryassembly'.l
An` electron discllargey device comprisingl aA focusing electrode having a cylindrical portion, a circular ridge extending from said portion and coaxial therewith, a first insulator ringy positioned around-said ridge, a cylindrical beam electrode bearing against said first ring and havingjtheisame outer diameter assaid portion, said beam electrode having a plurality of fingers extendingV therefrom Vand angesgintermediate,said fingers, a cylindrical cathode` sleeve adjacent said beam electrode, Asaidcathode sleeve havingv an felectron emitting'surface positioned towards said" focusing electrode, said fingers extending along said cathode sleeve, a second insulator ring closely encompassing said'portion and said beam electrode andpositioning said electrodes and said` focusing electrode positionedin said aperture and.
secured to said mounting member, said focusing electrode having a cylindrical portion extending behind said mounting member, a circular ridge coaxial with said cylindrical portion and extending. therefrom, a first insulating ring positioned around saidcridge, a'fhollowfrcylimirical beam eleca trode bearingagainstisaid first:insulatorzring'sandf. coaxial with, said;v cylindrical; portion,V the;`A outen surfaces;l ofi saidi cylindrical: portion and saidf beam eleotroderbeing aligned, aacylindrical cath--v ode sleevehaving anelectronemissive surface ad`- jacent said-beam electrode,- said beamv electrode;z having axpluralityiof .1 integral ,fingers extending` along said cathode sleeve and integral flangesin-i termediatea said fingers, a: secondiinsulatorring ittingw closely around: saidl aligned` surfaces. and positioningv said'V cathode sleeve, said; beam electrodeand said focusing. electrode inaccurate axial alignmentgv. spring. means "bearing againstA said'flanges and biasing saidV beam electrode to.- Wards saidrfccusingaelectrode,v and a cylindrical." retainingmember `secured to said mountingmeme berf and encompassingsaid'y 'second insulator ring; said `retaining.'member 5 having fingers bent over,` and exerting'pressure;uponv but insulated from said springineans.`
7'. Any velectron'v discharge: devicev in accord;-v
ancezwithgclaim 6 vwherein vsaid beam electrode;-A
fingers compriseathefonly. thermal contactbe.a4 tween;,said cathode sleeve* and said'beam elec trode';
8. An' electron dischargefdevice comprisingr'ai mounting vmember` having an aperture therein,. a focusing electrode positioned inA saidA aperture' and isecured` to said? mounting member, .a cavity: resonator Apositioned rto one side ofi said mounts. ing` member; saidtfocusing'l electrode havingA an* aperture defining an entrance for electrons into saidi resonator, va cylindricali portion' extending' fron-[said focusing electrode away from said' resi-- onator; saidcylindrical ,por-tion' having a .circular ridge, a yfirst insulating ring having an accurately` determined thickness: positioned loosely around: said ridge, a hollow cylindrical beam electrode bearingagainst said first',l insulator ringandcoaxial with said cylindrical portion, the outer sure faces offsaid cylindrical portion and said beam electrodebeing aligned,` a cylindrical cathode* sleeveihaving a;concave Aelectron emissive surface towards said resonator;` said beam electrodehaving azplura'lityV of Ashort fingers integral therewith extending `along Isaid cathode sleeve and integral @anges intermediate said ngers, said fingers comprising the only thermal contactib'etween'said cathode sleeve and" said .beamn electrode, a second' insulator ring fitting'closely around said aligned surfacesandxpositioningsaid cathode sleeve, said 't beam electrode, and said focusing electrode in accurate axial alignment,` a spider spring i bearing against said angesxandbiasing said beam elec trede` towards; said focusing"electrode;` a thinin'- sulating.iringadjacentfsaid.spider spring, a ring springbearingagainst saidthin insulator ring, and a cylindrical retaining member secured to saidmounting member and encompassing said' secondV insulator` ring, said"retaining member` having fingersfb'ent 'over'andbearing against said ring spring.`
CHARLEST. GODDARD.
References Cited 1 in Yth'ele of this patent UNITED STATES PATENTS Number Name Date 2,239,416'k Ehrenberg Apr. 22l9lll,v 2,414,785' Harrison et al; Jani 21, 194'? 2,452,318 Nergaard !)ct 26, 1948' 2,513,296 V 'Ekstrand etai July 4, 1950i
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US198612A US2635207A (en) | 1950-12-01 | 1950-12-01 | Electron discharge device of the cavity resonator type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US198612A US2635207A (en) | 1950-12-01 | 1950-12-01 | Electron discharge device of the cavity resonator type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2635207A true US2635207A (en) | 1953-04-14 |
Family
ID=22734082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US198612A Expired - Lifetime US2635207A (en) | 1950-12-01 | 1950-12-01 | Electron discharge device of the cavity resonator type |
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| Country | Link |
|---|---|
| US (1) | US2635207A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2900561A (en) * | 1953-12-15 | 1959-08-18 | Bendix Aviat Corp | Electron discharge device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2239416A (en) * | 1939-01-25 | 1941-04-22 | Emi Ltd | Cathode for electron discharge devices |
| US2414785A (en) * | 1942-01-29 | 1947-01-21 | Sperry Gyroscope Co Inc | High-frequency tube structure |
| US2452318A (en) * | 1944-03-27 | 1948-10-26 | Rca Corp | Electron discharge device utilizing cavity resonators |
| US2513296A (en) * | 1945-02-01 | 1950-07-04 | Bell Telephone Labor Inc | Electron discharge device, including tunable cavity resonator |
-
1950
- 1950-12-01 US US198612A patent/US2635207A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2239416A (en) * | 1939-01-25 | 1941-04-22 | Emi Ltd | Cathode for electron discharge devices |
| US2414785A (en) * | 1942-01-29 | 1947-01-21 | Sperry Gyroscope Co Inc | High-frequency tube structure |
| US2452318A (en) * | 1944-03-27 | 1948-10-26 | Rca Corp | Electron discharge device utilizing cavity resonators |
| US2513296A (en) * | 1945-02-01 | 1950-07-04 | Bell Telephone Labor Inc | Electron discharge device, including tunable cavity resonator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2900561A (en) * | 1953-12-15 | 1959-08-18 | Bendix Aviat Corp | Electron discharge device |
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