US3789331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vernier tuning means for uhf tuner or the like
Assignee: Arris Technology Inc
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Filing: 1972-09-29
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Granted: 1974-01-29
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Expires: 1992-09-29
Abstract
Abstract In a conventional variable capacitor type tuner, in which the rotor plates optionally may be provided with positionally adjustable sections which sequentially and cumulatively come into capacitive relationship with a stator plate of appreciable area, vernier tuning is accomplished by providing an additional stator plate of limited area which cooperates with its own rotor having individually positionable sections of substantially the same angular extent as the corresponding stator and which come sequentially and non-cumulatively into operative relationship with the stator. The individually positionable sections of the vernier rotor may be staggered with respect to the individually positionable sections of the standard rotor for optimum results. The vernier rotor can generally be similar to the standard rotor in having its sections extend generally at right angles to the axis of rotation, in which case where many channels are to be tuned the individual sections of the vernier rotor may encompass the tuning of a limited plurality of said channels, or the sections of the vernier rotor may comprise extensions thereof extending generally parallel to the axis of rotation thereof, in which case a larger number of individual sections can be provided than with conventional rotors.
Inventors
- 👤 C Miner
- 👤 E Balash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:25
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/20
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
308 words
In a high frequency tuner, variable capacitor means comprising first and second capacitors each comprising a stator and a rotor, the stators of said two capacitors being directly electrically connected, the rotors of said two capacitors being directly electrically connected and operatively mechanically connected for simultaneous movement over first and second given distances respectively to tune over the desired range, said stator of said first capacitor having a dimension extending in the general direction of said movement of said rotor of said first capacitor which at least substantially corresponds to said first movement distance, said rotor of said first capacitor having a dimension extending in the said general direction of said movement of said rotor which at least substantially corresponds to said first given distance, said rotor being movable over said first given distance between positions of minimum and maximum operative overlap with said stator, said stator of said second capacitor having a dimension extending in the general direction of movement of said rotor of said second capacitor which is only a minor fraction of said second given distance, said rotor of said second capacitor having a dimension extending in the said general direction of movement of said rotor which is much larger than the corresponding dimension of said stator of said second capacitor and being divided into a plurality of sections each having a dimension in the said general direction of movement of said rotor approximately that of said stator of said second capacitor and movable sequentially into and out of operative overlap with their corresponding stator as said rotor is moved from end of the desired range to the other, the spacing of said sections relative to their corresponding stator when overlapping said stator being individually adjustable, thereby to facilitate the adjustment of the capacitance-rotation characteristic of said capacitor means for a multiplicity of rotational points.
Claim 2
Dependent Claim
308 words
In a high frequency tuner, variable capacitor means comprising first and second capacitors each comprising a stator and a rotor, the stators of said two capacitors being directly electrically connected, the rotors of said two capacitors being directly electrically connected and operatively mechanically connected for simultaneous movement over first and second given distances respectively to tune over the desired range, said stator of said first capacitor having a dimension extending in the general direction of said movement of said rotor of said first capacitor which at least substantially corresponds to said first movement distance, said rotor of said first capacitor having a dimension extending in the said general direction of said movement of said rotor which at least substantially corresponds to said first given distance, said rotor being movable over said first given distance between positions of minimum and maximum operative overlap with said stator, said stator of said second capacitor having a dimension extending in the general direction of movement of said rotor of said second capacitor which is only a minor fraction of said second given distance, said rotor of said second capacitor having a dimension extending in the said general direction of movement of said rotor which is much larger than the corresponding dimension of said stator of said second capacitor and being divided into a plurality of sections each having a dimension in the said general direction of movement of said rotor approximately that of said stator of said second capacitor and movable sequentially into and out of operative overlap with their corresponding stator as said rotor is moved from end of the desired range to the other, the spacing of said sections relative to their corresponding stator when overlapping said stator being individually adjustable, thereby to facilitate the adjustment of the capacitance-rotation characteristic of said capacitor means for a multiplicity of rotational points.
Claim 3
Dependent Claim
89 words
The tuner of claim 1, in which said rotor of said first capacitor is divided into a plurality of sections each having a dimension in the general direction of movement of said rotor which is a fraction of the Corresponding overall dimension of said rotor and movable sequentially into cumulative operative overlap with their corresponding stator as said rotor is moved from one end of the desired tuning range to the other, the spacing of said sections relative to their corresponding stator while overlapping said stator being individually adjustable.
Claim 4
Dependent Claim
76 words
The tuner of claim 2, in which said sections of said first capacitor are separated from one another at a first set of points spaced from one another in the general direction of movement of said rotor and said sections of said second capacitor are separated from one another at a second set of points spaced from one another in the general direction of movement of said rotor and differing from said first set of points.
Claim 5
Dependent Claim
31 words
The tuner of claim 3, in which said first set of points and said second set of points alternate with each other in the general direction of movement of said rotor.
Claim 6
Dependent Claim
33 words
The tuner of claim 3, in which said first set of points and said second set of points alternate with each other substantially uniformly in the general direction of movement of said rotor.
Claim 7
Dependent Claim
47 words
The tuner of claim 1, in which said tuner is a UHF tuner designed to tune over substantially the seventy channels of the UHF band, and said dimension of said stator of said second capacitor corresponds to the tuning of about six channels in the UHF band.
Claim 8
Dependent Claim
89 words
The tuner of claim 6, in which said rotor of said first capacitor is divided into a plurality of sections each having a dimension in the general direction of movement of said rotor which is a fraction of the corresponding overall dimension of said rotor and movable sequentially into cumulative operative overlap with their corresponding stator as said rotor is moved from one end of the desired tuning range to the other, the spacing of said sections relative to their corresponding stator while overlapping said stator being individually adjustable.
Claim 9
Dependent Claim
76 words
The tuner of claim 7, in which said sections of said first capacitor are separated from one another at a first set of points spaced from one another in the general direction of movement of said rotor and said sections of said second capacitor are separated from one another at a second set of points spaced from one another in the general direction of movement of said rotor and differing from said first set of points.
Claim 10
Dependent Claim
31 words
The tuner of claim 8, in which said first set of points and said second set of points alternate with each other in the general direction of movement of said rotor.
Claim 11
Dependent Claim
33 words
The tuner of claim 8, in which said first set of points and said second set of points alternate with each other substantially uniformly in the general direction of movement of said rotor.
Claim 12
Dependent Claim
32 words
The tuner of claim 7, in which said sections of said rotor of said first capacitor have a said dimension corresponding to the tuning of about six channels in the UHF band.
Claim 13
Dependent Claim
31 words
The tuner of claim 8, in which said sections of said rotor of said first capacitor have a dimension corresponding to the tuning of about six channels in the UHF band.
Claim 14
Dependent Claim
32 words
The tuner of claim 9, in which said sections of said rotor of said first capacitor have a said dimension corresponding to the tuning of about six channels in the UHF band.
Claim 15
Dependent Claim
32 words
The tuner of claim 10, in which said sections of said rotor of said first capacitor have a said dimension corresponding to the tuning of about six channels in the UHF band.
Claim 16
Dependent Claim
55 words
The tuner of claim 1, in which said rotor and said stator of said first capacitor comprise parallel plates with said rotor rotatable about an axis substantially at right angles to said plates, and said rotor and stator of said second capacitor comprise parallel plates substantially perpendicular to the corresponding parts of said first capacitor.
Claim 17
Dependent Claim
56 words
The tuner of claim 1, in which said rotor and said stator of said first capacitor comprise parallel plates with said rotor rotatable about an axis substantially at right angles to said plates, and said rotor and statOr of said second capacitor means comprise parallel plates substantially parallel to the corresponding parts of said first capacitor.
Claim 18
Dependent Claim
53 words
The tuner of claim 1, in which said rotor of said second capacitor comprises a member rotatable about an axis and having said sections extending therefrom substantially in the same direction as said axis, the stator of said second capacitor being mounted adjacent said sections to extend in a direction substantially parallel thereto.
Claim 19
Dependent Claim
65 words
The tuner of claim 1, in which said rotor of said second capacitor comprises a disk rotatable about an axis, said sections of said capacitor means being defined by fingers arranged circumferentially around said disk and extending therefrom in a direction substantially parallel to said axis, the stator of said second capacitor being mounted adjacent said sections to extend in a direction substantially parallel thereto.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |