US3076057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadcast stereo receiver
Assignee: Westinghouse Electric Corp
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Filing: 1959-04-22
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Granted: 1963-01-29
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Expires: 1979-04-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles W Baugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:34
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/86; H04H20/88; H04J; H04J9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
APPARATUS FOR RECEIVING A SINGLE CARRIER WAVE AMPLITUDE MODULATED WITH A FIRST SIGNAL A+B AND FREQUENCY MODULATED WITH A SECOND SIGNAL A-B WHEREIN A AND B ARE STEREOPHONIC SIGNALS REPRESENTATIVE OF SOUND INTELLIGENCE AT FIRST AND SECOND SPACED LOCATIONS, SAID RECEIVER APPARATUS COMPRISING AN INPUT SIGNAL PATH INCLUDING AT LEAST ONE HIGH FREQUENCY AMPLIFYING STAGE FOR TRANSLATION OF CARRIER SIGNALS HAVING SAID AMPLITUDE AND FREQUENCY MODULATIONS, FIRST CHANNEL MEANS COUPLED TO THE OUTPUT OF SAID SIGNAL PATH AND INCLUDING AMPLITUDE DEMODULATION MEANS RESPONSIVE TO THE AMPLITUDE MODULATION OF SAID CARRIER SIGNALS FOR REPRODUCING SAID FIRST SIGNAL A+B; SECOND CHANNEL MEANS COUPLED TO SAID SIGNAL PATH AND INCLUDING IN CASCADE CONNECTION, AN AMPLITUDE LIMITER, CARRIER FREQUENCY MULTIPLYING MEANS, AND A FREQUENCY MODULATION DETECTOR FOR REPRODUCING SAID SECOND SIGNAL A-B, SAID FREQUENCY MULTIPLYING MEANS BEING ARRANGED TO CONVERT THE FREQUENCY MODULATION CARRIER SIGNALS IN SAID SECOND CHANNEL TO A FREQUENCY OUTSIDE THE PASS-BAND OF SAID HIGH FREQUENCY AMPLIFYING STAGE WHEREBY SPURIOUS
Claim 2
Dependent Claim
159 words
APPARATUS FOR RECEIVING A SINGLE CARRIER WAVE AMPLITUDE MODULATED WITH A FIRST SIGNAL A+B AND FREQUENCY MODULATED WITH A SECOND SIGNAL A-B WHEREIN A AND B ARE STEREOPHONIC SIGNALS REPRESENTATIVE OF SOUND INTELLIGENCE AT FIRST AND SECOND SPACED LOCATIONS, SAID RECEIVER APPARATUS COMPRISING AN INPUT SIGNAL PATH INCLUDING AT LEAST ONE HIGH FREQUENCY AMPLIFYING STAGE FOR TRANSLATION OF CARRIER SIGNALS HAVING SAID AMPLITUDE AND FREQUENCY MODULATIONS, FIRST CHANNEL MEANS COUPLED TO THE OUTPUT OF SAID SIGNAL PATH AND INCLUDING AMPLITUDE DEMODULATION MEANS RESPONSIVE TO THE AMPLITUDE MODULATION OF SAID CARRIER SIGNALS FOR REPRODUCING SAID FIRST SIGNAL A+B; SECOND CHANNEL MEANS COUPLED TO SAID SIGNAL PATH AND INCLUDING IN CASCADE CONNECTION, AN AMPLITUDE LIMITER, CARRIER FREQUENCY MULTIPLYING MEANS, AND A FREQUENCY MODULATION DETECTOR FOR REPRODUCING SAID SECOND SIGNAL A-B, SAID FREQUENCY MULTIPLYING MEANS BEING ARRANGED TO CONVERT THE FREQUENCY MODULATION CARRIER SIGNALS IN SAID SECOND CHANNEL TO A FREQUENCY OUTSIDE THE PASS-BAND OF SAID HIGH FREQUENCY AMPLIFYING STAGE WHEREBY SPURIOUS
References Cited (Backward Citations)
GB519558A
Cited
US2273097A
Cited
US2491809A
Cited
US2513763A
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US2512530A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |