US3575632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling arrangement for magnetron
Assignee: Panasonic Holdings Corp
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Filing: 1968-09-06
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Granted: 1971-04-20
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Expires: 1988-09-06
Abstract
Abstract A magnetron device composed by improving the medium or large size magnetron device having an output power of the order of 500 watts in ultrahigh frequency, which comprises as cooling means an assembly of a natural air-cooled type radiator formed of aluminum or alloy thereof and which, accordingly, does not necessitate the cooling means like blowers provided to conventional devices. Said device has such advantages that noise is eliminated during operation and that it is light and compact and therefore it is particularly suitable for a domestic-use microwave range.
Inventors
- 👤 Yoshio Kato
- 👤 Yasuo Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/005; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0027
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
In an air-cooled magnetron device comprising a magnetron tube and a magnetic field generator magnetically coupled to said magnetron tube, a cooling arrangement comprising a substantially rectangular board having a hole at the center thereof to which the anode block of the magnetron tube is fitted and on which the magnetic field generator is mounted, and a pair of groups of fins attached to the opposite side-faces of said board, said groups of fins being disposed so as to protect said magnetic field generator.
Claim 2
Dependent Claim
84 words
In an air-cooled magnetron device comprising a magnetron tube and a magnetic field generator magnetically coupled to said magnetron tube, a cooling arrangement comprising a substantially rectangular board having a hole at the center thereof to which the anode block of the magnetron tube is fitted and on which the magnetic field generator is mounted, and a pair of groups of fins attached to the opposite side-faces of said board, said groups of fins being disposed so as to protect said magnetic field generator.
Claim 3
Dependent Claim
45 words
A cooling arrangement as defined in claim 1, wherein said fins are disposed in such a manner that the surfaces of said fins are parallel with the main axis of the magnetron tube and with the opposing direction of said pair of groups of fins.
Claim 4
Dependent Claim
73 words
A cooling arrangement as defined in claim 1, wherein the weight of said board is 20 percent to 60 percent of the total weight of said cooling arrangement, and the difference between the temperature of the peripheral part of said hole in said board and the temperature of the edge part of said board where said group of fins are attached is less than 50* C. during the operation of said magnetron tube.
Claim 5
Dependent Claim
18 words
A cooling arrangement as defined in claim 1, wherein said board and said fins are made of aluminum.
Claim 6
Dependent Claim
21 words
A cooling arrangement as defined in claim 1, wherein said board and said fins are made of an alloy of aluminum.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |