US3875469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anode structure for magnetron
Assignee: Hitachi Ltd
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Filing: 1973-12-11
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Granted: 1975-04-01
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Expires: 1993-12-11
Abstract
Abstract A magnetron is disclosed which comprises one or more equalizing rings each including a cylinder portion and a plurality of protrusions. Part of each anode vane is cut out in a rectangular shape to form a groove for supporting the equalizing ring, and the protrusions from one of the equalizing rings are projected inwardly radially toward the axis of the cylinder portion and at the same time projected from an axial end of the cylinder portion in the direction substantially parallel to the axis of the cylinder portion, in such a manner that a radial end fo the protrusion is brought into contact with that side wall of the support groove which is nearer to the anode while an axial end thereof is in contact with the bottom of the support groove thereby to fix the equalizing ring in position.
Inventors
- 👤 Kazuo Sato
- 👤 Shigeki Hirohata
- 👤 Tomokatsu Oguro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:10
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/18; H01J23/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
247 words
An anode structure for a magnetron comprising an anode cylinder; plural anode vanes radially inwardly projecting from the inner periphery of said anode cylinder; and a first equalizing ring and a second equalizing ring, each of said equalizing rings being fitted in a plurality of support grooves formed in said anode vanes, said first equalizing ring including a first cylinder portion having a predetermined height and first protrusions projecting from said first cylinder portion, said second equalizing ring including a second cylinder portion having a predetermined height and second protrustions projecting from said second cylinder portion; and wherein each of said support grooves constitutes a rectangular recess formed in a respective anode vane, and each of said first protrusions is formed by an offset parallelepiped projection which is substantially parallel with The axis of said first cylinder portion, and is substantially flush with and has the same height as said first cylinder portion and extends from said first cylinder portion radially inwardly toward said axis, whereby said first protrusion has a radially inwardly projecting portion and an axially projecting portion, the end of the radially-projecting portion of each of said first protrusions being in contact with that side wall of a selected one of said support grooves which is nearer to the axis of said anode cylinder, the end of the axially-projecting portion thereof being in contact with the bottom of said selected one of said support grooves, to thereby fix said first equalizing ring in position.
Claim 2
Dependent Claim
247 words
An anode structure for a magnetron comprising an anode cylinder; plural anode vanes radially inwardly projecting from the inner periphery of said anode cylinder; and a first equalizing ring and a second equalizing ring, each of said equalizing rings being fitted in a plurality of support grooves formed in said anode vanes, said first equalizing ring including a first cylinder portion having a predetermined height and first protrusions projecting from said first cylinder portion, said second equalizing ring including a second cylinder portion having a predetermined height and second protrustions projecting from said second cylinder portion; and wherein each of said support grooves constitutes a rectangular recess formed in a respective anode vane, and each of said first protrusions is formed by an offset parallelepiped projection which is substantially parallel with The axis of said first cylinder portion, and is substantially flush with and has the same height as said first cylinder portion and extends from said first cylinder portion radially inwardly toward said axis, whereby said first protrusion has a radially inwardly projecting portion and an axially projecting portion, the end of the radially-projecting portion of each of said first protrusions being in contact with that side wall of a selected one of said support grooves which is nearer to the axis of said anode cylinder, the end of the axially-projecting portion thereof being in contact with the bottom of said selected one of said support grooves, to thereby fix said first equalizing ring in position.
Claim 3
Dependent Claim
44 words
An anode structure for a magnetron according to claim 1, in which the offset length of said axially projecting portion of said first protrusion is substantially not less than 0.4mm and not more than one half of the height of said first cylinder portion.
Claim 4
Dependent Claim
26 words
An anode structure for a magnetron according to claim 1, in which each parallelepiped projection is offset integrally with a part of said first cylinder portion.
Claim 5
Dependent Claim
44 words
An anode structure for a magnetron according to claim 3, in which the offset length of said axially projecting portion of said first protrusion is substantially not less than 0.4mm and not more than one half of the height of said first cylinder portion.
Claim 6
Dependent Claim
150 words
An anode structure for a magnetron according to claim 1, in which each of said second protrusions is formed by an offset parallelepiped projection which is substantially in parallel with the axis of said second cylinder portion and is substantially flush with and has the same height as said second cylinder portion and extends from said second cylinder portion radially outwardly, whereby said second protrusion has a radially outwardly projecting portion and an axially projecting portion, the end of the radially-projecting portion of each of said second protrusions being in contact with that side wall of one of the support grooves other than those contacted by said first equalizing ring which is far from the axis of said anode cylinder, the end of the axially-projecting portion thereof being in contact with the bottom of said one of said other support grooves to thereby fix said second equalizing ring in position.
Claim 7
Dependent Claim
32 words
An anode structure for a magnetron according to claim 5, in which said parallelepiped projection extending from said second cylinder portion is offset integrally with a part of said second cylinder portion.
Claim 8
Dependent Claim
32 words
An anode structure for a magnetron according to claim 6, in which said parallelepiped projection extending from said first cylinder portion is offset integrally with a part of said first cylinder portion.
Claim 9
Dependent Claim
45 words
An anode structure for a magnetron according to claim 7, in which the offset length of said axially projecting portion of said first protrusion is substantially not less than 0.4 mm and not more than one half of the height of said first cylinder portion.
Claim 10
Dependent Claim
45 words
An anode structure for a magnetron according to claim 5, in which the offset length of said axially projecting portion of said second protrusion is substantially not less than 0.4 mm and not more than one half of the height of said second cylinder portion.
Claim 11
Dependent Claim
45 words
An anode structure for a magnetron according to claim 8, in which the offset length of said axially projecting portion of said second protrusion is substantially not less than 0.4 mm and not more than one half of the height of said second cylinder portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |