US3553524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetron with improved vane and strap structure
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1969-01-06
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Granted: 1971-01-05
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Expires: 1989-01-06
Abstract
Abstract A vane and strap type magnetron is presented which includes a unique slot arrangement for receiving a thin strap. A first relatively large opening is located proximate but spaced from the vane tip. A second opening in the form of a slot-like passage is located in the vane between the first opening and vane tip to form a passage therebetween. The strap is, broadly speaking, of a relatively flat washer-like geometry and fits through the slotlike opening into a position in the large opening and in that position avoids contacting the vane. A second slot-like opening is vertically spaced from the above mentioned openings and provides a snug fit for a second horizontally spaced vane strap. The method of the invention includes an assembly procedure in which the vanes are pushed onto the straps.
Inventors
- 👤 Donald G Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:45
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/18; H01J23/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
395 words
In a magnetron of the vane and strap type which includes a cylindrical anode; a plurality of anode vanes spaced about and projecting radially from a cylindrical anode wall to within a predetermined distance of an axially located cylindrical cathode, with the vane tips of each of said vanes facing said cathode; and first and second vane straps spaced from one another, said first strap being in contact with alternate ones of said vanes without contacting intermediate ones of said vanes for providing an electrical connection between said alternate vanes and said second strap being in contact with intermediate ones of said vanes without contacting said alternate vanes for providing an electrical connection between said intermediate vanes: the invention wherein said alternate vanes at a first predetermined location thereof and said intermediate vanes at a second predetermined location thereof each include: a first aperture therethrough located proximate the vane tip; said first aperture being larger in dimension than the corresponding dimensions of an annular portion of a vane strap; and a second slotlike aperture of smaller height than the corresponding height of said first aperture; said second slotlike aperture extending and forming a passage between said vane tip and said first aperture for permitting said vane during assembly to be inserted over said strap to locate said strap in said first aperture; and wherein said intermediate vanes at a first predetermined location thereof and said alternate vanes at a second predetermined location thereof each include: a third slotlike aperture, said third slotlike aperture extending from the vane tip a predetermined distance into said vane for contacting and therewithin receiving a strap; said third slotlike aperture having approximately the same height as the height of said second aperture of said vanes; and wherein each said first and second straps comprise a relatively thin flat continuous annular member having a thickness dimension slightly less than the height dimension of said second and third apertures; said first strap being situated in said third slotlike aperture in said intermediate vanes for providing an electrical connection therebetween and extending through said first apertures of said alternate vanes without contact with said alternate vanes; and said second strap being situated in said third slotlike aperture in said alternate vanes for providing an electrical connection therebetween and extending through said first apertures of said intermediate vanes without contact with said intermediate vanes.
Claim 2
Dependent Claim
395 words
In a magnetron of the vane and strap type which includes a cylindrical anode; a plurality of anode vanes spaced about and projecting radially from a cylindrical anode wall to within a predetermined distance of an axially located cylindrical cathode, with the vane tips of each of said vanes facing said cathode; and first and second vane straps spaced from one another, said first strap being in contact with alternate ones of said vanes without contacting intermediate ones of said vanes for providing an electrical connection between said alternate vanes and said second strap being in contact with intermediate ones of said vanes without contacting said alternate vanes for providing an electrical connection between said intermediate vanes: the invention wherein said alternate vanes at a first predetermined location thereof and said intermediate vanes at a second predetermined location thereof each include: a first aperture therethrough located proximate the vane tip; said first aperture being larger in dimension than the corresponding dimensions of an annular portion of a vane strap; and a second slotlike aperture of smaller height than the corresponding height of said first aperture; said second slotlike aperture extending and forming a passage between said vane tip and said first aperture for permitting said vane during assembly to be inserted over said strap to locate said strap in said first aperture; and wherein said intermediate vanes at a first predetermined location thereof and said alternate vanes at a second predetermined location thereof each include: a third slotlike aperture, said third slotlike aperture extending from the vane tip a predetermined distance into said vane for contacting and therewithin receiving a strap; said third slotlike aperture having approximately the same height as the height of said second aperture of said vanes; and wherein each said first and second straps comprise a relatively thin flat continuous annular member having a thickness dimension slightly less than the height dimension of said second and third apertures; said first strap being situated in said third slotlike aperture in said intermediate vanes for providing an electrical connection therebetween and extending through said first apertures of said alternate vanes without contact with said alternate vanes; and said second strap being situated in said third slotlike aperture in said alternate vanes for providing an electrical connection therebetween and extending through said first apertures of said intermediate vanes without contact with said intermediate vanes.
Claim 3
Dependent Claim
73 words
The invention as defined in claim 1 wherein each said strap includes: a plurality, equal in number to one-half the number of vanes, of projecting portions each of which protrudes radially inwardly from the inner periphery of said annular member, each of said projections located within a corresponding one of said third slotlike apertures in which said annular member is situated to fill said respective third slotlike apertures up to the vane tip.
Claim 4
Dependent Claim
91 words
The invention as defined in claim 2 wherein each said strap further includes: a plurality of shallow slots, equal in number to one-half the number of vanes, located evenly spaced along the outer periphery of said annular member, each said shallow slot having a bottom located within a corresponding one of said third slotlike apertures in which said annular member is situated and having sides in contact with the sides of the vane that includes said corresponding third slotlike apertures for enhancing alignment during assembly between said vanes and said strap.
Claim 5
Dependent Claim
246 words
A magnetron anode for a magnetron of the type containing a cylindrical anode having a plurality of spaced vanes projecting from said anode and surrounding a cylindrical cathode, with each of said vanes having a tip facing said cathode, and said anode includes at least first and second annular shaped vane straps, wherein intermediate ones of said plurality of vanes are connected by said first strap and the alternate ones of said plurality of vanes are connected by said second strap; the invention wherein each alternate vane includes a first opening spaced from the vane tip, said first opening being larger in dimensions than corresponding dimensions of an annular portion of said first strap; a second slotlike passage extending between said vane tip and said first opening for permitting said vane during assembly to be inserted over said strap to locate said strap in said first opening; wherein each intermediate vane includes a third slotlike passage extending into said vane from said vane tip for contacting and therewithin receiving said first strap; and wherein said first strap comprises a relatively thin flat continuous annular washer-shaped member having a plurality of equally spaced thin and flat projecting portions protruding radially inwardly from the inner periphery of said annular portion; said plurality of projecting portions in said first strap corresponding in number to one-half the number of vanes in said plurality of vanes and being located in corresponding ones of said third slotlike passage in said intermediate vanes.
Claim 6
Dependent Claim
246 words
A magnetron anode for a magnetron of the type containing a cylindrical anode having a plurality of spaced vanes projecting from said anode and surrounding a cylindrical cathode, with each of said vanes having a tip facing said cathode, and said anode includes at least first and second annular shaped vane straps, wherein intermediate ones of said plurality of vanes are connected by said first strap and the alternate ones of said plurality of vanes are connected by said second strap; the invention wherein each alternate vane includes a first opening spaced from the vane tip, said first opening being larger in dimensions than corresponding dimensions of an annular portion of said first strap; a second slotlike passage extending between said vane tip and said first opening for permitting said vane during assembly to be inserted over said strap to locate said strap in said first opening; wherein each intermediate vane includes a third slotlike passage extending into said vane from said vane tip for contacting and therewithin receiving said first strap; and wherein said first strap comprises a relatively thin flat continuous annular washer-shaped member having a plurality of equally spaced thin and flat projecting portions protruding radially inwardly from the inner periphery of said annular portion; said plurality of projecting portions in said first strap corresponding in number to one-half the number of vanes in said plurality of vanes and being located in corresponding ones of said third slotlike passage in said intermediate vanes.
Claim 7
Dependent Claim
31 words
The invention as defined in claim 4 wherein said second slotlike passage is of a predetermined length and height said length thereof being at least twice as great as said height
Claim 8
Dependent Claim
44 words
The invention as defined in claim 5 wherein said first strap includes further a plurality of slots along the outer periphery thereof corresponding in number and angularly aligned with said projections for enhancing alignment during assembly between said intermediate vanes and said first strap.
Claim 9
Dependent Claim
278 words
In a magnetron anode for a magnetron of the vane and strap type in which an even numbered plurality of anode vanes each having a vane tip are evenly spaced around and project radially inwardly from a cYlindrical surface and in which a first strap contacts intermediate ones of said vanes without contacting alternate ones of said vanes for providing an electrical connection between said intermediate vanes, the invention wherein said alternate vanes each include at a first predetermined location thereof: a first aperture therethrough located proximate the vane tip, said first aperture being larger in dimensions than corresponding dimensions of an annular portion of said strap; a second slotlike aperture of smaller height than the corresponding height of said first aperture, said second slotlike aperture extending and forming a passage between said vane tip and said first aperture for permitting said vane during assembly to be inserted over said strap to locate said strap in said first aperture; and wherein said intermediate vanes each include at a predetermined location thereof; a third slotlike aperture, said third slotlike aperture extending from the vane tip into said vane a predetermined distance for contacting and therewithin receiving said strap, said third slotlike aperture being of approximately the same height as said second aperture of said alternate vanes; and wherein said strap comprises; a relatively thin flat continuous annular member, said annular member having a thickness slightly less than the height of said second and third apertures, said strap being situated in said third slotlike aperture in said intermediate vanes for providing electrical connection therebetween and extends through said first apertures of said alternate vanes without contact with said alternate vanes.
Claim 10
Dependent Claim
278 words
In a magnetron anode for a magnetron of the vane and strap type in which an even numbered plurality of anode vanes each having a vane tip are evenly spaced around and project radially inwardly from a cYlindrical surface and in which a first strap contacts intermediate ones of said vanes without contacting alternate ones of said vanes for providing an electrical connection between said intermediate vanes, the invention wherein said alternate vanes each include at a first predetermined location thereof: a first aperture therethrough located proximate the vane tip, said first aperture being larger in dimensions than corresponding dimensions of an annular portion of said strap; a second slotlike aperture of smaller height than the corresponding height of said first aperture, said second slotlike aperture extending and forming a passage between said vane tip and said first aperture for permitting said vane during assembly to be inserted over said strap to locate said strap in said first aperture; and wherein said intermediate vanes each include at a predetermined location thereof; a third slotlike aperture, said third slotlike aperture extending from the vane tip into said vane a predetermined distance for contacting and therewithin receiving said strap, said third slotlike aperture being of approximately the same height as said second aperture of said alternate vanes; and wherein said strap comprises; a relatively thin flat continuous annular member, said annular member having a thickness slightly less than the height of said second and third apertures, said strap being situated in said third slotlike aperture in said intermediate vanes for providing electrical connection therebetween and extends through said first apertures of said alternate vanes without contact with said alternate vanes.
Claim 11
Dependent Claim
31 words
The invention as defined in claim 7 wherein said second slotlike aperture is of a predetermined length and height said length thereof being at least twice as great as said height
Claim 12
Dependent Claim
71 words
The invention as defined in claim 8 wherein said strap includes a shallow slot at each of those plurality of angular locations along the outer periphery thereof within said third slotlike aperture of each of said intermediate vanes; and wherein the back end of said third slotlike aperture in each vane is positioned within a corresponding shallow slot in said strap for enhancing alignment between said vanes and strap during assembly.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |