Patent CH561818A successfully refreshed from Google Patents.
Patent US3349346A successfully refreshed from Google Patents.
US3349346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectangular to circular waveguide transition
Assignee: General Electric Co
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Filing: 1965-03-08
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Granted: 1967-10-24
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Charles E Enderby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:41
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
A TRANSITION DEVICE BETWEEN A RECTANGULAR WAVEGUIDE HAVING BROAD AND NARROW WALLS OF PREDETERMINED TRANSVERSE LENGTH AND A CIRCULAR WAVEGUIDE HAVING A PREDETERMINED RADIUS, COMPRISING: A FIRST RECTANGULAR PORTION WHEREIN ONE NARROW WALL IS CHANGED TO AN ARCUATE NARROW WALL OVER A PREDETERMINED LONGITUDINAL LENGTH, SAID ARCUATE NARROW WALL HAVING A RADIUS EQUAL TO THE RADIUS OF SAID CIRCULAR WAVEGUIDE; A SECOND PORTION OF PREDETERMINED LONGITUDINAL LENGTH OVER WHICH THE INTERNAL CROSS-SECTION AREA IS INCREASED BY GRADUALLY INCREASING THE CIRCUMFERENTIAL LENGTH OF SAID ARCUATE WALL BY PIVOTING SAID BROAD WALLS AT THEIR JUNCTIONS WITH THE OTHER NARROW WALL TO THEREBY FORM A SEMICIRCULAR CROSS-SECTION AT THE END OF SAID SECOND PORTION; AND A THIRD PORTION OF PREDETERMINED LONGITUDINAL LENGTH OVER WHICH THE INTERNAL CROSS-SECTION AREA IS GRADUALLY FURTHER INCREASED BY GRADUALLY FOLDING AT THE CENTER THEREOF THE TWO HALVES OF THE STRAIGHT WALL OF SAID SEMICIRCULAR CROSS-SECTION UNTIL SAID TWO HALVES COINCIDE IN A RADIALLY EXTENDING KNIFE EDGE AT THE END OF SAID THIRD PORTION, AND A RADIALLY EXTENDING CONDUCTIVE RIDGE POSITIONED TO SUBSTANTIALLY BIFURCATE THE LENGTH OF THE THIRD PORTION OF SAID TRANSITION DEVICE, WHEREBY AN UNDESIRABLE TE11 MODE IS SUPPRESSED.
Claim 2
Dependent Claim
192 words
A TRANSITION DEVICE BETWEEN A RECTANGULAR WAVEGUIDE HAVING BROAD AND NARROW WALLS OF PREDETERMINED TRANSVERSE LENGTH AND A CIRCULAR WAVEGUIDE HAVING A PREDETERMINED RADIUS, COMPRISING: A FIRST RECTANGULAR PORTION WHEREIN ONE NARROW WALL IS CHANGED TO AN ARCUATE NARROW WALL OVER A PREDETERMINED LONGITUDINAL LENGTH, SAID ARCUATE NARROW WALL HAVING A RADIUS EQUAL TO THE RADIUS OF SAID CIRCULAR WAVEGUIDE; A SECOND PORTION OF PREDETERMINED LONGITUDINAL LENGTH OVER WHICH THE INTERNAL CROSS-SECTION AREA IS INCREASED BY GRADUALLY INCREASING THE CIRCUMFERENTIAL LENGTH OF SAID ARCUATE WALL BY PIVOTING SAID BROAD WALLS AT THEIR JUNCTIONS WITH THE OTHER NARROW WALL TO THEREBY FORM A SEMICIRCULAR CROSS-SECTION AT THE END OF SAID SECOND PORTION; AND A THIRD PORTION OF PREDETERMINED LONGITUDINAL LENGTH OVER WHICH THE INTERNAL CROSS-SECTION AREA IS GRADUALLY FURTHER INCREASED BY GRADUALLY FOLDING AT THE CENTER THEREOF THE TWO HALVES OF THE STRAIGHT WALL OF SAID SEMICIRCULAR CROSS-SECTION UNTIL SAID TWO HALVES COINCIDE IN A RADIALLY EXTENDING KNIFE EDGE AT THE END OF SAID THIRD PORTION, AND A RADIALLY EXTENDING CONDUCTIVE RIDGE POSITIONED TO SUBSTANTIALLY BIFURCATE THE LENGTH OF THE THIRD PORTION OF SAID TRANSITION DEVICE, WHEREBY AN UNDESIRABLE TE11 MODE IS SUPPRESSED.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |