US3898879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television tuner
Assignee: Oak Industries Inc
•
Filing: 1973-11-09
•
Granted: 1975-08-12
•
Expires: 1993-11-09
Abstract
Abstract A TV tuner has a housing and a rotating channel selector shaft mounted on the housing. There are a plurality of individual support members positioned by and mounted on parallel flatted areas of the shaft, which flatted areas vary in size to assure correct placement of the support members. Individual coil strips, each carrying a tuning screw, are fixed to the shaft assembly. A simplified clutching arrangement for controlling adjustment of the screws utilizes a coil spring to provide the initial force for moving a pinion gear into operating engagement with the tuning screws. The tuning screws are held by resilient arms which bias the head of the screws toward the shaft to thus firmly maintain the screws in any adjusted position. Each of the coil strips have contacts extending outwardly from one side and positioned to be in electrical and mechanical contact with cantilever spring members fastened to a printed circuit board which in turn is held by the housing.
Inventors
- 👤 Norman D Cappelle
- 👤 Walter Meyer
- 👤 Henry H Tap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:46
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/24; H03J5/26; H03J5/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
64 words
A TV tuner having a housing and a rotating channel selector shaft mounted in said housing, oscillator coil means mounted on said shaft, a plurality of fine tuning screws carried by said oscillator coil means and axially adjustable relative thereto, and means mounted on said shaft for holding each screw in an adjusted position and including means for biasing each screw toward said shaft.
Claim 2
Dependent Claim
64 words
A TV tuner having a housing and a rotating channel selector shaft mounted in said housing, oscillator coil means mounted on said shaft, a plurality of fine tuning screws carried by said oscillator coil means and axially adjustable relative thereto, and means mounted on said shaft for holding each screw in an adjusted position and including means for biasing each screw toward said shaft.
Claim 3
Dependent Claim
41 words
The structure of claim 1 further characterized in that the means mounted on said shaft for holding each screw includes a screw retainer member having a plurality of outwardly directed arms, there being a pair of arms for holding each screw.
Claim 4
Dependent Claim
45 words
The structure of claim 2 further characterized in that said screw retainer is formed of a resilient material, with each pair of arms defining a tapered slot, the shape of the tapered slot urging that portion of the screw within the slot toward the shaft.
Claim 5
Dependent Claim
35 words
The structure of claim 3 further characterized by and including lips on each of said arms in the area of the slot forming portions of the arms, said lips being pressed against the screw threads.
Claim 6
Dependent Claim
31 words
The structure of claim 1 further characterized in that said oscillator coil means includes a plurality of axially extending openings, with portions of each screw being positioned within its corresponding opening.
Claim 7
Dependent Claim
41 words
The structure of claim 5 further characterized in that each of said openings is non-circular in cross section and has a plurality of walls, each screw bearing against more than one of said walls, thereby preventing lateral movement of the screw.
Claim 8
Dependent Claim
19 words
The structure of claim 6 further characterized in that each of said openings is generally diamond in cross section.
Claim 9
Dependent Claim
156 words
A TV tuner having a housing and a rotating channel selector shaft mounted in said housing, a plurality of coil tuning assemblies and means for mounting said tuning assemblies on said shaft, a fine tuning screw carried by each tuning assembly and axially adjustable relative thereto, and means for adjusting said screws including a fine tuning gear concentrically mounted on said shaft, a pinion gear pivotally mounted on said housing and in engagement with said fine tuning gear, spring means on said housing urging said pinion gear away from said adjusting screws, and clutch means positioned for contact with said housing an effective to create a force overcoming said spring means to cause said pinion gear to pivotally move into contact with a screw upon rotation of said fine tuning gear including a coil spring having a portion coiled about said pinion gear and opposite end portion positioned for contact with spaced portions of said housing.
Claim 10
Dependent Claim
156 words
A TV tuner having a housing and a rotating channel selector shaft mounted in said housing, a plurality of coil tuning assemblies and means for mounting said tuning assemblies on said shaft, a fine tuning screw carried by each tuning assembly and axially adjustable relative thereto, and means for adjusting said screws including a fine tuning gear concentrically mounted on said shaft, a pinion gear pivotally mounted on said housing and in engagement with said fine tuning gear, spring means on said housing urging said pinion gear away from said adjusting screws, and clutch means positioned for contact with said housing an effective to create a force overcoming said spring means to cause said pinion gear to pivotally move into contact with a screw upon rotation of said fine tuning gear including a coil spring having a portion coiled about said pinion gear and opposite end portion positioned for contact with spaced portions of said housing.
Claim 11
Dependent Claim
48 words
The structure of claim 8 further characterized in that the means for pivotally mounting said pinion gear include a bracket extending outwardly from saiD housing, with the end of said pinion gear adjacent the portion in engagement with said fine tuning gear being pivotally mounted in said bracket.
Claim 12
Dependent Claim
110 words
A TV tuner having a housing and a rotating shaft mounted in said housing, a plurality of individual coil strips and means for peripherally mounting said strips about said shaft, a fine tuning screw carried by each strip and axially adjustable relative thereto, each of said strips including axially spaced contact members having a portion extending outwardly from one side of each strip, electric circuit means carried by said housing and a plurality of long, slender, flat cantilever spring members, in electrical circuit with said circuit means and mechanically fixed to said circuit means, said spring member being positioned for electrical and mechanical contact with said coil strip contact members.
Claim 13
Dependent Claim
110 words
A TV tuner having a housing and a rotating shaft mounted in said housing, a plurality of individual coil strips and means for peripherally mounting said strips about said shaft, a fine tuning screw carried by each strip and axially adjustable relative thereto, each of said strips including axially spaced contact members having a portion extending outwardly from one side of each strip, electric circuit means carried by said housing and a plurality of long, slender, flat cantilever spring members, in electrical circuit with said circuit means and mechanically fixed to said circuit means, said spring member being positioned for electrical and mechanical contact with said coil strip contact members.
Claim 14
Dependent Claim
31 words
The structure of claim 10 further characterized in that said electrical circuit means includes a printed circuit board, with said cantilever spring members being mechanically fastened to said printed circuit board.
Claim 15
Dependent Claim
21 words
The structure of claim 11 further characterized in that said spring members each have portions extending through said printed circuit board.
Claim 16
Dependent Claim
21 words
A structure of claim 10 further characterized in that said cantilever spring members are disposed generally perpendicular to said coil strips.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |