Patent US4170126A successfully refreshed from Google Patents.
Patent US3215929A successfully refreshed from Google Patents.
US3215929A
Expired / Lapsed
US
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Function generator
Assignee: ExxonMobil Upstream Research Co
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Filing: 1962-10-26
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Granted: 1965-11-02
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Expires: 1982-10-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Crawford
- 👤 Benjamin F Ehrlich
- 👤 James R Ording
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:56
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24; G01V1/245; G06; G06G; G06G7/00; G06G7/12; G06G7/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
166 words
IN COMBINATION: A SIGNAL GENERATOR; A TRANSFORMER HAVING A PRIMARY COIL ADAPTED TO RECEIVE SIGNALS FOR THE SIGNAL GENERATOR, SAID TRANSFORMER ALSO HAVING A MASTER SECONDARY COIL AND A SLAVE SECONDARY COIL WITH THE LOWER TERMINAL OF THE SLAVE SECONDARY COIL BEING CONNECTED TO THE LOWER TERMINAL OF THE MASTER SECONDARY COIL AND THE UPPER TERMINAL OF THE SLAVE SECONDARY COIL BEING CONNECTED TO THE LOWERMOST LOOP OF THE MASTER SECONDARY COIL, THE NUMBER OF TURNS IN EACH OF THE SECONDARY COILS PER UNIT OF DISTANCE INCREASING FROM THE LOWER TERMINAL TO THE UPPER TERMINAL; A PLURALITY OF TAPPING TERMINALS ON THE SECONDARY COILS, SAID TAPPING TERMINALS BEING EQUALLY SPACED IN DB RANGE ALONG THE SECONDARY COILS; A LINEAR POTENTIONETER; ELECTRICAL LINES CONNECTED TO THE TAPPING TERMINALS AND CONNECTED TO THE LINEAR POTENTIOMETER; A MOVABLE POTENTIOMETER TAP; A CONDUCTING LINE CONNECTED TO SAID MOVABLE POTENTIOMETER TAP; AND MEANS FOR CONTINUOUSLY MOVINT THE MOVABLE POTENTIOMETER TAPE WHEREBY A CONTINUOOUSLY DECREASING VOLTAGE MAY BE TAKEN FROM THE POTENTIOMETER.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |