Patent US3223781A successfully refreshed from Google Patents.
US3223781A
Expired / Lapsed
US
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Constant voltage device
Assignee: TDK Micronas GmbH
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Filing: 1962-02-13
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Granted: 1965-12-14
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Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 Hestad Alfred Magnus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:18
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/613; H; H04; H04M; H04M19/00; H04M19/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A CONSTANT VOLTAGE DEVICE COMPRISING A PLURALITY OF VOLTAGE DIVIDERS CONNECTED IN PRALLEL BETWEEN SOURCES OF POTENTIAL, EACH ARM OF SAID VOLTAGE DIVIDERS INCLUDING AN IMPEDANCE ELEMENT WHICH HAS CHARACTERISTICS SUCH THAT RELATIVELY LARGE VOLTAGE DROP VARIATIONS MAY OCCUR ACROSS THE ELEMENTS, MEANS INDIVIDUALLY ASSOCIATED WITH EACH OF SAID VOLTAGE DIVIDERS FOR CONTROLLING THE GAIN OF CURRENT FLOWING THERETHROUGH, MEANS RESPONSIVE TO VOLTAGE CHANGES APPEARING AT A POTENTIAL POINT ON ONE OF SAID VOLTAGE DIVIDERS FOR CONTROLLING THE CURRENT GAIN IN ANOTHER OF SAID VOLTAGE DIVIDERS, AND MEANS COMPRISING ONE ARM OF SAID OTHER VOLTAGE DIVIDER FOR PROVIDING A USEFUL LOAD CIRCUIT INCLUDING A TELEPHONE SPEECH PATH, WHEREBY THE VOLTAGE APPEARING ACROSS SAID ONE ARM PROVIDES THE TALKING BATTERY FOR SAID SPEECH PATH.
Claim 2
Dependent Claim
123 words
A CONSTANT VOLTAGE DEVICE COMPRISING A PLURALITY OF VOLTAGE DIVIDERS CONNECTED IN PRALLEL BETWEEN SOURCES OF POTENTIAL, EACH ARM OF SAID VOLTAGE DIVIDERS INCLUDING AN IMPEDANCE ELEMENT WHICH HAS CHARACTERISTICS SUCH THAT RELATIVELY LARGE VOLTAGE DROP VARIATIONS MAY OCCUR ACROSS THE ELEMENTS, MEANS INDIVIDUALLY ASSOCIATED WITH EACH OF SAID VOLTAGE DIVIDERS FOR CONTROLLING THE GAIN OF CURRENT FLOWING THERETHROUGH, MEANS RESPONSIVE TO VOLTAGE CHANGES APPEARING AT A POTENTIAL POINT ON ONE OF SAID VOLTAGE DIVIDERS FOR CONTROLLING THE CURRENT GAIN IN ANOTHER OF SAID VOLTAGE DIVIDERS, AND MEANS COMPRISING ONE ARM OF SAID OTHER VOLTAGE DIVIDER FOR PROVIDING A USEFUL LOAD CIRCUIT INCLUDING A TELEPHONE SPEECH PATH, WHEREBY THE VOLTAGE APPEARING ACROSS SAID ONE ARM PROVIDES THE TALKING BATTERY FOR SAID SPEECH PATH.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |