Patent US3110769A successfully refreshed from Google Patents.
US3110769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereo sound control system
Assignee: Telefunken AG
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Filing: 1960-01-15
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Granted: 1963-11-12
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Expires: 1980-01-15
Abstract
No abstract record available.
Inventors
- 👤 Bertram Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:27
CPC Classifications
H; H04; H04S; H04S1/00; H04S1/002; H04S5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A CONTROL SYSTEM FOR USE IN COMPATIBLE SOUND RECORDING OF THE TYPE EMPLOYING A SOUND CHANNEL AND A DIRECTION CHANNEL AND AT LEAST ONE MICROPHONE, SAID SYSTEM COMPRISING, A RESISTANCE BRIDGE CIRCUIT INCLUDING FOUR BRANCH RESISTANCES, THE MICROPHONE BEING COUPLED TO SAID SOUND CHANNEL AND TO A PAIR OF TERMINALS LOCATED AT ONE OF THE TWO BRIDGE DIAGONALS TO SUPPLY INPUT TO THE BRIDGE; TWO OUTPUT TERMINALS COUPLED TO THE DIRECTION CHANNEL; SEPARATE ADJUSTING MEANS CONNECTING EACH OF SAID OUTPUT TERMINALS TO TWO DIAMETRICALLY OPPOSITE RESISTANCES; AND MECHANICAL MEANS LINKING SAID SEPARATE ADJUSTING MEANS TOGETHER FOR GANGED MOVEMENT ALONG SAID RESISTANCES, WHEREBY AT ONE END OF THE RANGE OF MOVEMENT THE OUTPUT VOLTAGE ACROSS SAID OUTPUT TERMINALS IS EQUAL IN PHASE AND AMPLITUDE TO THE INPUT VOLTAGE FROM THE MICROPHONE AND AT THE OTHER END OF THE RANGE OF MOVEMENT, THE OUTPUT VOLTAGE IS EQUAL IN AMPLITUDE BUT OPPOSITE IN PHASE TO THE INPUT VOLTAGE.
Claim 2
Dependent Claim
155 words
A CONTROL SYSTEM FOR USE IN COMPATIBLE SOUND RECORDING OF THE TYPE EMPLOYING A SOUND CHANNEL AND A DIRECTION CHANNEL AND AT LEAST ONE MICROPHONE, SAID SYSTEM COMPRISING, A RESISTANCE BRIDGE CIRCUIT INCLUDING FOUR BRANCH RESISTANCES, THE MICROPHONE BEING COUPLED TO SAID SOUND CHANNEL AND TO A PAIR OF TERMINALS LOCATED AT ONE OF THE TWO BRIDGE DIAGONALS TO SUPPLY INPUT TO THE BRIDGE; TWO OUTPUT TERMINALS COUPLED TO THE DIRECTION CHANNEL; SEPARATE ADJUSTING MEANS CONNECTING EACH OF SAID OUTPUT TERMINALS TO TWO DIAMETRICALLY OPPOSITE RESISTANCES; AND MECHANICAL MEANS LINKING SAID SEPARATE ADJUSTING MEANS TOGETHER FOR GANGED MOVEMENT ALONG SAID RESISTANCES, WHEREBY AT ONE END OF THE RANGE OF MOVEMENT THE OUTPUT VOLTAGE ACROSS SAID OUTPUT TERMINALS IS EQUAL IN PHASE AND AMPLITUDE TO THE INPUT VOLTAGE FROM THE MICROPHONE AND AT THE OTHER END OF THE RANGE OF MOVEMENT, THE OUTPUT VOLTAGE IS EQUAL IN AMPLITUDE BUT OPPOSITE IN PHASE TO THE INPUT VOLTAGE.
References Cited (Backward Citations)
US2573122A
Cited
US2831060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |