Patent US3249860A successfully refreshed from Google Patents.
US3249860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring the thickness of material
Assignee: CENTRAL SCRAP METAL Co IN
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Filing: 1961-11-01
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Granted: 1966-05-03
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Expires: 1981-11-01
Abstract
No abstract record available.
Inventors
- 👤 William H Huggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:28
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01B7/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN COMBNATION, AN ELECTRIC CIRCUIT WHICH COMPRISES, A SOURCE OF CONTINUOUS ALTERNATING CURRENT, A PAIR OF RECTIFYING MEANS TO RECTIFY SAID ALTERNATING CURRENT TO A CONTINUOUS DIRECT CURRENT, MEANS TO BALANCE THE CURRENTS IN SAID RECTIFYING MEANS, A FIRST BIASING MEANS TO BIAS ONE OF SAID RECTIFYING MEANS WITH A REFERENCE VOLTAGE OF CONSTANT AMPLITUDE AND PHASE ANGLE, A SECOND BIASING MEANS TO BIAS THE OTHER RECTIFIER WITH A VOLTAGE OF CONSTANT AMPLITUDE AND VARIABLE PHASE ANGLE, MEANS TO FEED A BIASING CURRENT OF VARIABLE PHASE ANGLE INTO SAID SECOND BIASING MEANS AND MEANS TO MEASURE THE AMPLITUDE OF THE DIRECT CURRENT VOLTAGE ACROSS SAID PAIR OF RECTIFYING MEANS AS A FUNCTION OF THE RELATIVE PHASE DIAPLACEMENT OF SAID BIASING VOLTAGES.
Claim 2
Dependent Claim
121 words
IN COMBNATION, AN ELECTRIC CIRCUIT WHICH COMPRISES, A SOURCE OF CONTINUOUS ALTERNATING CURRENT, A PAIR OF RECTIFYING MEANS TO RECTIFY SAID ALTERNATING CURRENT TO A CONTINUOUS DIRECT CURRENT, MEANS TO BALANCE THE CURRENTS IN SAID RECTIFYING MEANS, A FIRST BIASING MEANS TO BIAS ONE OF SAID RECTIFYING MEANS WITH A REFERENCE VOLTAGE OF CONSTANT AMPLITUDE AND PHASE ANGLE, A SECOND BIASING MEANS TO BIAS THE OTHER RECTIFIER WITH A VOLTAGE OF CONSTANT AMPLITUDE AND VARIABLE PHASE ANGLE, MEANS TO FEED A BIASING CURRENT OF VARIABLE PHASE ANGLE INTO SAID SECOND BIASING MEANS AND MEANS TO MEASURE THE AMPLITUDE OF THE DIRECT CURRENT VOLTAGE ACROSS SAID PAIR OF RECTIFYING MEANS AS A FUNCTION OF THE RELATIVE PHASE DIAPLACEMENT OF SAID BIASING VOLTAGES.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |