US3175040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced stereophonic demodulator apparatus
Assignee: H H SCOTT Inc
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Filing: 1962-05-09
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Granted: 1965-03-23
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Expires: 1982-05-09
Abstract
No abstract record available.
Inventors
- 👤 Recklinghausen Daniel R Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:31
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/2209; H03D1/2218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
APPARATUS FOR DEMODULATING A COMPOSITE SIGNAL COMPRISING A MAIN-CHANNEL-SIGNAL FREQUENCY MODULATED COMPONENT AND A SUPPRESSED-CARRIER-MODULATED SUB-CHANNEL SIGNAL COMPONENT, SAID APPARATUS HAVING, IN COMBINATION, A PAIR OF AUDIO AMPLIFIERS EACH PROVIDED WITH INPUT AND OUTPUT CIRCUITS, EACH OF SAID INPUT CIRCUITS HAVING A PAIR OF INPUT TERMINALS, A PAIR OF OPPOSITELY POLED BRIDGE RECTIFIER DEMODULATOR CIRCUITS, EACH PROVIDED WITH FIRST AND SECOND PAIRS OF TERMINALS, MEANS CONNECTED TO THE FIRST PAIR OF TERMINALS OF EACH OF SAID DEMODULATOR CIRCUITS FOR APPLYING THE SAID COMPOSITE SIGNAL THERETO, MEANS CONNECTING THE FIRST PAIR OF TERMINALS OF ONE OF SAID DEMODULATOR CIRCUITS TO CORRESPONDING INPUT TERMINALS OF ONE OF SAID AMPLIFIERS, MEANS CONNECTING THE FIRST PAIR OF TERMINALS OF THE OTHER OF SAID DEMODULATOR CIRCUITS TO CORRESPONDING INPUT TERMINALS OF THE OTHER OF SAID AMPLIFIERS, AND MEANS CONNECTED WITH THE SECOND PAIR OF TERMINALS OF THE PAIR OF DEMODULATOR CIRCUITS FOR APPLYING THERETO PUSH-PULL REINSERT SUB-CARRIER OSCILLATIONS OF FREQUENCY CORRESPONDING TO THAT OF THE SAID SUPPRESSED CARRIER IN ORDER TO PERMIT AND PREVENT THE PASSAGE OF SIGNAL DURING ALTERNATE PORTIONS OF THE PERIOD OF THE SAID OSCILLATIONS.
Claim 2
Dependent Claim
183 words
APPARATUS FOR DEMODULATING A COMPOSITE SIGNAL COMPRISING A MAIN-CHANNEL-SIGNAL FREQUENCY MODULATED COMPONENT AND A SUPPRESSED-CARRIER-MODULATED SUB-CHANNEL SIGNAL COMPONENT, SAID APPARATUS HAVING, IN COMBINATION, A PAIR OF AUDIO AMPLIFIERS EACH PROVIDED WITH INPUT AND OUTPUT CIRCUITS, EACH OF SAID INPUT CIRCUITS HAVING A PAIR OF INPUT TERMINALS, A PAIR OF OPPOSITELY POLED BRIDGE RECTIFIER DEMODULATOR CIRCUITS, EACH PROVIDED WITH FIRST AND SECOND PAIRS OF TERMINALS, MEANS CONNECTED TO THE FIRST PAIR OF TERMINALS OF EACH OF SAID DEMODULATOR CIRCUITS FOR APPLYING THE SAID COMPOSITE SIGNAL THERETO, MEANS CONNECTING THE FIRST PAIR OF TERMINALS OF ONE OF SAID DEMODULATOR CIRCUITS TO CORRESPONDING INPUT TERMINALS OF ONE OF SAID AMPLIFIERS, MEANS CONNECTING THE FIRST PAIR OF TERMINALS OF THE OTHER OF SAID DEMODULATOR CIRCUITS TO CORRESPONDING INPUT TERMINALS OF THE OTHER OF SAID AMPLIFIERS, AND MEANS CONNECTED WITH THE SECOND PAIR OF TERMINALS OF THE PAIR OF DEMODULATOR CIRCUITS FOR APPLYING THERETO PUSH-PULL REINSERT SUB-CARRIER OSCILLATIONS OF FREQUENCY CORRESPONDING TO THAT OF THE SAID SUPPRESSED CARRIER IN ORDER TO PERMIT AND PREVENT THE PASSAGE OF SIGNAL DURING ALTERNATE PORTIONS OF THE PERIOD OF THE SAID OSCILLATIONS.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |