US3577106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable iris
Assignee: Nortel Networks Ltd
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Filing: 1969-07-14
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Granted: 1971-05-04
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Expires: 1989-07-14
Abstract
Abstract A variable aperture iris located at a waveguide T-junction. Two sliding gates and their related positioning members are of a suitable configuration to form a smooth continuous surface along the waveguide for all sizes of aperture opening.
Inventors
- 👤 Leslie Gaza Varhelyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:48
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/04; H01P1/00; H01P1/20; H01P1/213; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
A variable iris positioned in a wall of a main waveguide comprising: a support surface spaced from the plane of said waveguide wall defining a fixed aperture. supporting members extending from said support surface toward the plane of said waveguide wall, a first gate having a projecting smooth wall at one side thereof and spaced guiding members positioned abutting on said support surface for slidable movement with the guiding members engaging the supporting members and said smooth wall forming a portion of the waveguide wall partially covering said fixed aperture, a second gate having a smooth wall at one side thereof and spaced guiding members positioned abutting on and engaged with said first gate section for slidable movement, the smooth wall of said second gate forming a further portion of the waveguide wall partially covering said fixed aperture, a pair of positioning members, one for each gate section, each having opposed smooth and notched surfaces positioned with said notched surfaces engaging with notched portions on said gates and the smooth surfaces forming further portions of said waveguide wall, whereby movement of said positioning members moves said gates to alter the opening of the variable iris, the smooth walls of said gates and the smooth surfaces of said positioning members forming a substantially unbroken coplanar surface.
Claim 2
Dependent Claim
215 words
A variable iris positioned in a wall of a main waveguide comprising: a support surface spaced from the plane of said waveguide wall defining a fixed aperture. supporting members extending from said support surface toward the plane of said waveguide wall, a first gate having a projecting smooth wall at one side thereof and spaced guiding members positioned abutting on said support surface for slidable movement with the guiding members engaging the supporting members and said smooth wall forming a portion of the waveguide wall partially covering said fixed aperture, a second gate having a smooth wall at one side thereof and spaced guiding members positioned abutting on and engaged with said first gate section for slidable movement, the smooth wall of said second gate forming a further portion of the waveguide wall partially covering said fixed aperture, a pair of positioning members, one for each gate section, each having opposed smooth and notched surfaces positioned with said notched surfaces engaging with notched portions on said gates and the smooth surfaces forming further portions of said waveguide wall, whereby movement of said positioning members moves said gates to alter the opening of the variable iris, the smooth walls of said gates and the smooth surfaces of said positioning members forming a substantially unbroken coplanar surface.
Claim 3
Dependent Claim
39 words
A variable iris as defined in claim 1 wherein said support surface defines a further waveguide forming a tee junction with the main waveguide and the variable iris alters the coupling between said main waveguide and said further waveguide.
Claim 4
Dependent Claim
38 words
A variable iris as defined in claim 2 wherein said supporting members are extensions of the sidewalls of the further waveguide and the guiding members of said first gate consist of a pair of spaced apart parallel legs.
Claim 5
Dependent Claim
31 words
A variable iris as defined in claim 3 wherein the guiding members of said second gate are a pair of spaced apart parallel legs received in channels in said first gate.
Claim 6
Dependent Claim
16 words
A variable iris as defined in claim 1 wherein said positioning members are of tapered configuration.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |