US3316751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measuring apparatus
Assignee: Phillips Petroleum Co
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Filing: 1963-12-09
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Granted: 1967-05-02
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Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Marvin C Burk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/86; G01N30/8624; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
APPARATUS FOR ZEROING AN ANALOG TO DIGITAL CONVERSION SYSTEM COMPRISING A VOLTAGE SOURCE HAVING A BIASING TERMINAL AND AN OUTPUT TERMINAL, AN ANALOG TO DIGITAL CONVERTER, MEANS FOR CONNECTING SAID OUTPUT TERMINAL TO AN INPUT OF SAID ANALOG TO DIGITAL CONVERTER, MEANS ADAPTED TO MEASURE THE DIGITAL OUTPUT OF SAID ANALOG TO DIGITAL CONVERTER, MEANS FOR PERIODICALLY CONNECTING THE INPUT OF SAID MEANS TO MEASURE TO THE OUTPUT OF SAID ANALOG TO DIGITAL CONVERTER, MEANS RESPONSIVE TO SAID MEANS TO MEASURE TO PRODUCE AN ANALOG ERROR CORRECTION SIGNAL OF A FIRST POLARITY WHEN THE OUTPUT OF SAID MEANS TO MEASURE IS BELOW A PREDETERMINED VALUE AND TO PRODUCE AN ANALOG CORRECTION SIGNAL OF OPPOSITE POLARITY WHEN THE OUTPUT OF SAID MEANS TO MEASURE IS ABOVE SAID PREDETERMINED VALUE, AND MEANS FOR APPLYING THE ANALOG ERROR SIGNAL THUS PRODUCED TO SAID BIASING TERMINAL.
Claim 2
Dependent Claim
142 words
APPARATUS FOR ZEROING AN ANALOG TO DIGITAL CONVERSION SYSTEM COMPRISING A VOLTAGE SOURCE HAVING A BIASING TERMINAL AND AN OUTPUT TERMINAL, AN ANALOG TO DIGITAL CONVERTER, MEANS FOR CONNECTING SAID OUTPUT TERMINAL TO AN INPUT OF SAID ANALOG TO DIGITAL CONVERTER, MEANS ADAPTED TO MEASURE THE DIGITAL OUTPUT OF SAID ANALOG TO DIGITAL CONVERTER, MEANS FOR PERIODICALLY CONNECTING THE INPUT OF SAID MEANS TO MEASURE TO THE OUTPUT OF SAID ANALOG TO DIGITAL CONVERTER, MEANS RESPONSIVE TO SAID MEANS TO MEASURE TO PRODUCE AN ANALOG ERROR CORRECTION SIGNAL OF A FIRST POLARITY WHEN THE OUTPUT OF SAID MEANS TO MEASURE IS BELOW A PREDETERMINED VALUE AND TO PRODUCE AN ANALOG CORRECTION SIGNAL OF OPPOSITE POLARITY WHEN THE OUTPUT OF SAID MEANS TO MEASURE IS ABOVE SAID PREDETERMINED VALUE, AND MEANS FOR APPLYING THE ANALOG ERROR SIGNAL THUS PRODUCED TO SAID BIASING TERMINAL.
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |