US3924191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Touch-tuning system for a television receiver
Assignee: Zenith Electronics LLC
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Filing: 1974-04-01
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Granted: 1975-12-02
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Expires: 1994-04-01
Abstract
Abstract A varactor tuner television receiver touch-tuning system includes a clock pulse-driven counter supplying a binary to decimal converter, which is coupled to an analog switch for sequentially transferring control of the tuner among a plurality of tuning positions. A tuning potentiometer, a position indicator and a position switch are located at each tuning position. Upon closure of any position switch, a transistor switch is enabled to start the counter. The transistor switch is disabled to stop the counter when the selected tuning position is reached.
Inventors
- 👤 Johnny Collins
- 👤 Melvin C Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:23
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/0218; H03J5/0227; H03J5/0236
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
An electronic touch-tuning system for a television receiver having a varactor tuner and a plurality of position switches individually associated with a corresponding plurality of tuning positions, comprising: pulse driven switching means including a cyclical counter for sequentially transferring control of said varactor tuner among said tuning positions; a pulse source; and position seeking means coupling said switching means to said pulse source for transferring control of said tuner to the tuning position associated with the actuated one of said position switches.
Claim 2
Dependent Claim
82 words
An electronic touch-tuning system for a television receiver having a varactor tuner and a plurality of position switches individually associated with a corresponding plurality of tuning positions, comprising: pulse driven switching means including a cyclical counter for sequentially transferring control of said varactor tuner among said tuning positions; a pulse source; and position seeking means coupling said switching means to said pulse source for transferring control of said tuner to the tuning position associated with the actuated one of said position switches.
Claim 3
Dependent Claim
35 words
An electronic touch-tuning system as set forth in claim 1 wherein said pulse driven switching means further includes a binary to decimal converter; said cyclical counter producing a binary coded output for driving said converter.
Claim 4
Dependent Claim
68 words
An electronic touch-tuning system as set forth in claim 2 further including a plurality of tuning potentiometers corresponding to said tuning positions, each said potentiometer having a movable tap for adjusting the tuning voltage for said varactor tuner; said pulse driven switching means further including an analog switch coupled between said converter and said potentiometers for selectively connecting the movaable taps of said potentiometers to said varactor tuner.
Claim 5
Dependent Claim
47 words
An electronic touch-tuning system as set forth in claim 3 wherein said position seeking means comprises transistor switch means coupled between said pulse source and said cyclical counter for energizing said counter from said pulse source responsive to actuation of any of said plurality of position switches.
Claim 6
Dependent Claim
65 words
An electronic touch-tuning system as set forth in claim 4 wherein said switching means comprises a normally on transistor connected across the input of a normally off transistor, said pulse source being coupled to said input of said normally off transistor, said position switches, upon actuation, driving said normally on transistor to its off state and switching said normally off transistor to its on state.
Claim 7
Dependent Claim
32 words
An electronic touch-tuning system as set forth in claim 5 further including up-down control switches coupled to said counter for sequencing said switching means to advance to an immediately adjacent tuning position.
Claim 8
Dependent Claim
30 words
an electronic touch-tuning system as set forth in claim 6 including an AND gate coupled between the output of said normally off transistor and one of said up-down control switches.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |