Patent US3308398A successfully refreshed from Google Patents.
US3308398A
Expired / Lapsed
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Telemetering apparatus for converting a direct current signal to a proportionally varying frequency signal
Assignee: Bendix Corp
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Filing: 1963-10-18
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Granted: 1967-03-07
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Expires: 1983-10-18
Abstract
No abstract record available.
Inventors
- 👤 Edward A Chilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:49
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
APPARATUS FOR CONVERTING A D.C. SIGNAL INTO AN OUTPUT HAVING A FREQUENCY DIRECTLY PROPORTIONAL TO SAID D.C. SIGNAL, COMPRISING A TRANSDUCER FOR GENERATING AN OUTPUT SIGNAL, A SUBCARRIER OSCILLATOR HAVING INPUT AND OUTPUT CIRCUITS, A FEEDBACK PATH COUPLING SAID INPUT AND OUTPUT CIR CUITS, SAID FEEDBACK PATH INCLUDING A FREQUENCY TO VOLTAGE CONVERTER FOR GENERATING A FEEDBACK SINAL IN OPPOSITION TO THE INPUT SIGNAL, A HIGH GAIN D.C. AMPLIFIER FOR AMPLIFYING A CONTROL SIGNAL FORMED OF SAID TRANSDUCER OUTPUT AND SAID FEEDBACK SIGNAL, SAID OSCILLATOR BEING RESPONSIVE TO SAID AMPLIFIED CONTROL SIGNAL TO GENERATE A FIRST OUTPUT HAVING A FREQUENCY DIRECTLY PROPORTIONAL TO SAID AMPLIFIED CONTROL SIGNAL, MEANS FOR GENERATING OSCILLATIONS OF STABLE FREQUENCY, MEANS RESPONSIVE TO THE OUTPUT OF SAID STABLE FREQUENCY GENERATING MEANS AND TO SAID FIRST OUTPUT FOR GENERATING A SECOND USABLE OUTPUT OF LOWER FREQUENCY DIRECTLY PROPORTIONAL TO THE D.C. SIGNAL, SAID FREQUENCY TO VOLTAGE CONVERTER BEING RESPONSIVE TO SAID SECOND OUTPUT OF LOWER FREQUENCY WHEREBY IT IS CAPABLE OF OPERATING WITH A HIGH DEGREE OF ACCURACY.
Claim 2
Dependent Claim
171 words
APPARATUS FOR CONVERTING A D.C. SIGNAL INTO AN OUTPUT HAVING A FREQUENCY DIRECTLY PROPORTIONAL TO SAID D.C. SIGNAL, COMPRISING A TRANSDUCER FOR GENERATING AN OUTPUT SIGNAL, A SUBCARRIER OSCILLATOR HAVING INPUT AND OUTPUT CIRCUITS, A FEEDBACK PATH COUPLING SAID INPUT AND OUTPUT CIR CUITS, SAID FEEDBACK PATH INCLUDING A FREQUENCY TO VOLTAGE CONVERTER FOR GENERATING A FEEDBACK SINAL IN OPPOSITION TO THE INPUT SIGNAL, A HIGH GAIN D.C. AMPLIFIER FOR AMPLIFYING A CONTROL SIGNAL FORMED OF SAID TRANSDUCER OUTPUT AND SAID FEEDBACK SIGNAL, SAID OSCILLATOR BEING RESPONSIVE TO SAID AMPLIFIED CONTROL SIGNAL TO GENERATE A FIRST OUTPUT HAVING A FREQUENCY DIRECTLY PROPORTIONAL TO SAID AMPLIFIED CONTROL SIGNAL, MEANS FOR GENERATING OSCILLATIONS OF STABLE FREQUENCY, MEANS RESPONSIVE TO THE OUTPUT OF SAID STABLE FREQUENCY GENERATING MEANS AND TO SAID FIRST OUTPUT FOR GENERATING A SECOND USABLE OUTPUT OF LOWER FREQUENCY DIRECTLY PROPORTIONAL TO THE D.C. SIGNAL, SAID FREQUENCY TO VOLTAGE CONVERTER BEING RESPONSIVE TO SAID SECOND OUTPUT OF LOWER FREQUENCY WHEREBY IT IS CAPABLE OF OPERATING WITH A HIGH DEGREE OF ACCURACY.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |