Patent US3621476A successfully refreshed from Google Patents.
US3621476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulator having heat dissipating plate
Assignee: TDK Corp
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Filing: 1970-03-09
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Granted: 1971-11-16
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Expires: 1990-03-09
Abstract
Abstract A nonreciprocal circuit element in which some portions of a heat dissipating plate or heat sink which are introduced into a magnetic shield case through apertures thereof are made in close contact with a case which houses microwave ferrite elements and a center conductor. The heat dissipating effect is remarkably improved.
Inventors
- 👤 Naohiko Kanbayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:38
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
222 words
A nonreciprocal circuit element for a circulator system comprising a pair of opposed microwave ferrite elements; conductor means passing between said ferrite elements in abutting relation; said conductor means having at least three terminals extending therefrom; a hollow body case surrounding and enclosing said ferrite elements, said case having a top surface and a bottom surface; a magnet element mounted on said top surface of said case, and a pressure plate mounted on top of said magnet element; a magnetic shield case provided in two matching parts, the upper part positioned above said conductor means and enclosing one of said ferrite elements, the upper part of said body case, the magnet element and the pressure plate; and the lower part positioned below said conductor means and enclosing the other of said ferrite elements and the lower part of said body case; said lower part including a flat portion parallel with and abutting the bottom surface of said body case, said flat surface including apertures therein adjacent edges of said bottom surface; a support on which said magnetic shield case is positioned; and a heat dissipating plate located between the lower part of said magnetic shield case and said support in abutting relation therewith, said heat dissipating plate including projecting tongue elements extending through said apertures in abutting contact with said body case.
Claim 2
Dependent Claim
222 words
A nonreciprocal circuit element for a circulator system comprising a pair of opposed microwave ferrite elements; conductor means passing between said ferrite elements in abutting relation; said conductor means having at least three terminals extending therefrom; a hollow body case surrounding and enclosing said ferrite elements, said case having a top surface and a bottom surface; a magnet element mounted on said top surface of said case, and a pressure plate mounted on top of said magnet element; a magnetic shield case provided in two matching parts, the upper part positioned above said conductor means and enclosing one of said ferrite elements, the upper part of said body case, the magnet element and the pressure plate; and the lower part positioned below said conductor means and enclosing the other of said ferrite elements and the lower part of said body case; said lower part including a flat portion parallel with and abutting the bottom surface of said body case, said flat surface including apertures therein adjacent edges of said bottom surface; a support on which said magnetic shield case is positioned; and a heat dissipating plate located between the lower part of said magnetic shield case and said support in abutting relation therewith, said heat dissipating plate including projecting tongue elements extending through said apertures in abutting contact with said body case.
Claim 3
Dependent Claim
103 words
A nonreciprocal circuit element according to claim 1, in which said body case, said magnetic shield case and said heat dissipating plate each have six sides to be hexagonal in shape, three equal spaced terminals are provided extending from nonadjacent sides of said body case, said apertures in the lower part of said magnetic shield case includes three equally spaced apertures each located adjacent a flat side of said body case that is adjacent to the flat side in which a terminal is located, and said tongue elements includes three upwardly projecting tongues respectively corresponding in placement to said apertures and extending therethrough.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |