US3135922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television fm tuner converter
Assignee: Standard Coil Products Co Inc
•
Filing: 1958-08-26
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Granted: 1964-06-02
•
Expires: 1978-08-26
Abstract
No abstract record available.
Inventors
- 👤 Robert C A Eland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:48
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H03; H03D; H03D7/00; H03D7/06; H03D7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A TELEVISION RECEIVER FOR RECEIVING THE BAND OF BROADCAST FM RADIO SIGNALS, INCLUDING AN FM TUNER MEANS FOR HETERODYNING SAID BAND OF BROADCAST RADIO SIGNALS DOWN TO A COMMON IF FREQUENCY FM, FOR PRESENTMENT TO A TV TUNER MEANS; SAID TV TUNER MEANS COMPRISING AN RF AMPLIFIER STAGE FOR AMPLIFYING THE FM MODULATED FM SIGNALS, AN OSCILLATOR FOR GENERATING A BASIC FREQUENCY FO (EQUAL TO FM PLUS THE FREQUENCY SEPARATION OF THE SOUND AND VIDEO CARRIERS OF EACH TV CHANNEL), A MIXER HETERODYNING THE RF AMPLIFIED FM MODULATED FM SIGNALS WITH THE SECOND HARMONIC OF FO TO FORM A HETERODYNED SIGNAL, AND CIRCUIT MEANS FOR COUPLING SAID HETERODYNED SIGNAL TOGETHER WITH THE THIRD HARMOIC OF FO TO THE IF AMPLIFIER OF THE TV RECEIVER, SAID RECEIVER INCORPORATING FM DETECTOR MEANS RESPONSIVE TO THE IF AMPLIFIER OUTPUT FOR DERIVING THE AUDIO SIGNALS FROM THE RESULTANT BEAT SIGNAL, FOR PRESENTMENT TO A TV TUNER MEANS; SAID TV TUNER MEANS AT THE FREQUENCY (FO-FM).
Claim 2
Dependent Claim
161 words
A TELEVISION RECEIVER FOR RECEIVING THE BAND OF BROADCAST FM RADIO SIGNALS, INCLUDING AN FM TUNER MEANS FOR HETERODYNING SAID BAND OF BROADCAST RADIO SIGNALS DOWN TO A COMMON IF FREQUENCY FM, FOR PRESENTMENT TO A TV TUNER MEANS; SAID TV TUNER MEANS COMPRISING AN RF AMPLIFIER STAGE FOR AMPLIFYING THE FM MODULATED FM SIGNALS, AN OSCILLATOR FOR GENERATING A BASIC FREQUENCY FO (EQUAL TO FM PLUS THE FREQUENCY SEPARATION OF THE SOUND AND VIDEO CARRIERS OF EACH TV CHANNEL), A MIXER HETERODYNING THE RF AMPLIFIED FM MODULATED FM SIGNALS WITH THE SECOND HARMONIC OF FO TO FORM A HETERODYNED SIGNAL, AND CIRCUIT MEANS FOR COUPLING SAID HETERODYNED SIGNAL TOGETHER WITH THE THIRD HARMOIC OF FO TO THE IF AMPLIFIER OF THE TV RECEIVER, SAID RECEIVER INCORPORATING FM DETECTOR MEANS RESPONSIVE TO THE IF AMPLIFIER OUTPUT FOR DERIVING THE AUDIO SIGNALS FROM THE RESULTANT BEAT SIGNAL, FOR PRESENTMENT TO A TV TUNER MEANS; SAID TV TUNER MEANS AT THE FREQUENCY (FO-FM).
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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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |