Patent US4001737A successfully refreshed from Google Patents.
US4001737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cavity tuning assembly having coarse and fine tuning means
Assignee: Federal Communications Commission
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Filing: 1975-10-24
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Granted: 1977-01-04
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Expires: 1995-10-24
Abstract
Abstract A cavity tuning assembly for use in a tuned cavity having provisions for coarse tune adjustment and fine tune adjustment for changing the frequency of the cavity's resonance. Coarse tune adjustment is obtained by sliding an unthreaded cavity tuning rod of the cavity tuning assembly up and down through a threaded bushing to obtain rough tune whereupon the unthreaded rod is locked into place by way of a knurl nut compressing a split end portion of a shaft lock screwed onto the threaded bushing into friction engagement around the cavity tuning rod. Fine tune adjustment is obtained by rotating the unthreaded rod into engagement with the shaft lock and the threaded bushing causing the threaded bushing and engaged structure to screw into or out of a pipe reducer to obtain fine tune which is then locked against the threaded bushing by a lever lock nut.
Inventors
- 👤 James E. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:25
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/53; Y10T403/535
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
In a tuned resonant frequency cavity having an outside cylinder, a top plate and a bottom plate connected to said cylinder, said top plate having a tapped center hole, the improvement in said tuned resonant frequency cavity comprising means coupled to a smooth shaft for coarse tuning said cavity and a further means coupled to said smooth shaft for fine tuning said cavity said shaft extending through said tapped hole.
Claim 2
Dependent Claim
70 words
In a tuned resonant frequency cavity having an outside cylinder, a top plate and a bottom plate connected to said cylinder, said top plate having a tapped center hole, the improvement in said tuned resonant frequency cavity comprising means coupled to a smooth shaft for coarse tuning said cavity and a further means coupled to said smooth shaft for fine tuning said cavity said shaft extending through said tapped hole.
Claim 3
Dependent Claim
25 words
The improvement of claim 1 wherein said coarse tune means comprises means for friction engagement of said shaft, and first locking means for said shaft.
Claim 4
Dependent Claim
16 words
The improvement of claim 2 wherein guide means for said shaft comprises an elongated threaded bushing.
Claim 5
Dependent Claim
49 words
The improvement of claim 3 wherein said friction engagement means and first said locking means comprises a shaft lock, screwed onto said elongated threaded bushing, a split end portion on the upper portion of said shaft lock, and a hexagonal portion on the bottom portion of said shaft lock.
Claim 6
Dependent Claim
23 words
The improvement of claim 4 wherein said elongated threaded bushing holds said smooth shaft in loose friction engagement so as to insure slidability.
Claim 7
Dependent Claim
35 words
The improvement of claim 5 wherein said first locking means comprises a knurl nut screwed onto said split end portion of said shaft lock compressing into friction engagement said smooth shaft with said shaft lock.
Claim 8
Dependent Claim
34 words
The improvement of claim 2 wherein said fine tuning means comprises means for fine adjustment by rotating an elongated threaded bushing in pipe reducer means and providing a second locking means for said shaft.
Claim 9
Dependent Claim
36 words
The improvement of claim 7 wherein said reducer means comprises a threaded reducer screwed into said tapped hole of said top plate and said threaded busing carrying said first shaft lock rotatably screwed into said reducer.
Claim 10
Dependent Claim
15 words
The improvement of claim 8 wherein said second locking means comprises a lever lock nut.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |