Patent US3392325A successfully refreshed from Google Patents.
US3392325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision ac transducer with tapchanging autotransformer
Assignee: Applied Biosystems Inc
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Filing: 1966-04-13
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Granted: 1968-07-09
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Expires: 1986-04-13
Abstract
No abstract record available.
Inventors
- 👤 John J Glowinski
- 👤 John D Viggiano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:01
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/02; H01F29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
AN A.C. TRANSDUCER COMPRISING: AN AUTOTRANSFORMER HAVING A WINDING AND MEANS INCLUDING INPUT AND REFERENCE TERMINALS THEREOF FOR APPLYING AN INPUT SIGNAL VOLTAGE TO THE WINDING, SAID WINDING HAVING A PLURALITY OF TAPS FOR PROVIDING INCREMENTS OF THE INPUT SIGNAL VOLTAGE THEREBETWEEN, AN OUTPUT SIGNAL TERMINAL FOR SAID TRANSDUCER, AN INTERPOLATING MEANS FOR DERIVING FROM SAID WINDING A SIGNAL HAVING AN AMPLITUDE LESS THAN AN INCREMENT OF SIGNAL VOLTAGE BETWEEN THE TAPS, SWITCHING MEANS FOR PROGRESSIVELY COUPLING SAID INTERPOLATING MEANS TO SUCCESSIVE TAPS ON SAID WINDING, AND SAID INTERPOLATING MEANS INCLUDING FIRST AND SECOND ELONGATED PARALLEL COUPLED RESISTANCES, FIRST AND SECOND WIPER CONTACTS ADAPTED FOR RESPECTIVELY CONTACTING SAID FIRST AND SECOND RESISTANCES AT INTERMEDIATE POSITIONS ALONG THE LENGTH OF THE RESISTANCES, AND
Claim 2
Dependent Claim
122 words
AN A.C. TRANSDUCER COMPRISING: AN AUTOTRANSFORMER HAVING A WINDING AND MEANS INCLUDING INPUT AND REFERENCE TERMINALS THEREOF FOR APPLYING AN INPUT SIGNAL VOLTAGE TO THE WINDING, SAID WINDING HAVING A PLURALITY OF TAPS FOR PROVIDING INCREMENTS OF THE INPUT SIGNAL VOLTAGE THEREBETWEEN, AN OUTPUT SIGNAL TERMINAL FOR SAID TRANSDUCER, AN INTERPOLATING MEANS FOR DERIVING FROM SAID WINDING A SIGNAL HAVING AN AMPLITUDE LESS THAN AN INCREMENT OF SIGNAL VOLTAGE BETWEEN THE TAPS, SWITCHING MEANS FOR PROGRESSIVELY COUPLING SAID INTERPOLATING MEANS TO SUCCESSIVE TAPS ON SAID WINDING, AND SAID INTERPOLATING MEANS INCLUDING FIRST AND SECOND ELONGATED PARALLEL COUPLED RESISTANCES, FIRST AND SECOND WIPER CONTACTS ADAPTED FOR RESPECTIVELY CONTACTING SAID FIRST AND SECOND RESISTANCES AT INTERMEDIATE POSITIONS ALONG THE LENGTH OF THE RESISTANCES, AND
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |