US3273055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant impedance dual circuits for sample material flaw detection
Assignee: API Instruments Co
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Filing: 1965-10-18
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Granted: 1966-09-13
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Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 George F Quittner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:48
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
APPATATUS FOR DETECTING A FLAW IN A RELATIVELY MOVING SAMPLE HAVING RELATIVELY EXTENDED LENGTH AND A LONGITUDINAL AXIS WHICH COINCIDES WITH THE DIRECTION OF RELATIVE MOVEMENT, COMPRISING THE COMBINATION OF: A FIELD GENERATING DEVICE HAVING TWO ENDS AND ARRANGED COAXIAL WITH THE SAMPLE WITHOUT MAGNETIC MATERIAL INTERVENING BETWEEN SAID FIELD GENERATING DEVICE AND SAMPLE, A FIRST SENSING COIL ARRANGED COAXIAL WITH THE SAMPLE WITHOUT MAGNETIC MATERIAL INTERVENING BETWEEN SAID SENSING COIL AND SAMPLE, SAID SENSING COIL BEING LOCATED ADJACENT ONE OF SAID FIELD GENERATING DEVICE ENDS, A SECOND SENSING COIL ARRANGED COAXIAL WITH THE SAMPLE WITHOUT MAGNETIC MATERIAL INTERVENING BETWEEN SAID SECOND SENSING COIL AND SAMPLE, SAID SECOND SENSING COIL BEING LOCATED ADJACENT THE OTHER OF SAID FIELD GENERATING DEVICE ENDS, A FIRST VOLTAGE DIVIDER HAVING TWO ENDS AND A TAP WITH THE ENDS THEREOF CONNECTED TO BE ENERGIZED BY THE FIRST SENSING COIL, A SECOND VOLTAGE DIVIDER TWO ENDS AND A TAP WITH THE ENDS THEREOF CONNECTED TO BE ENERGIZED BY THE SECOND SENSING COIL. FIRST AND SECOND CONTROLLABLE ELECTRONIC DEVICES EACH HAVING A LOAD CIRCUIT AND A CONTROL CIRCUIT AND WHEREIN EACH CONTROL CIRCUIT HAS AN IMPEDANCE WHICH IS HIGH COMPARED TO THAT OF EACH OF SAID FIRST AND SECOND VOLTAGE DIVIDERS,
Claim 2
Dependent Claim
204 words
APPATATUS FOR DETECTING A FLAW IN A RELATIVELY MOVING SAMPLE HAVING RELATIVELY EXTENDED LENGTH AND A LONGITUDINAL AXIS WHICH COINCIDES WITH THE DIRECTION OF RELATIVE MOVEMENT, COMPRISING THE COMBINATION OF: A FIELD GENERATING DEVICE HAVING TWO ENDS AND ARRANGED COAXIAL WITH THE SAMPLE WITHOUT MAGNETIC MATERIAL INTERVENING BETWEEN SAID FIELD GENERATING DEVICE AND SAMPLE, A FIRST SENSING COIL ARRANGED COAXIAL WITH THE SAMPLE WITHOUT MAGNETIC MATERIAL INTERVENING BETWEEN SAID SENSING COIL AND SAMPLE, SAID SENSING COIL BEING LOCATED ADJACENT ONE OF SAID FIELD GENERATING DEVICE ENDS, A SECOND SENSING COIL ARRANGED COAXIAL WITH THE SAMPLE WITHOUT MAGNETIC MATERIAL INTERVENING BETWEEN SAID SECOND SENSING COIL AND SAMPLE, SAID SECOND SENSING COIL BEING LOCATED ADJACENT THE OTHER OF SAID FIELD GENERATING DEVICE ENDS, A FIRST VOLTAGE DIVIDER HAVING TWO ENDS AND A TAP WITH THE ENDS THEREOF CONNECTED TO BE ENERGIZED BY THE FIRST SENSING COIL, A SECOND VOLTAGE DIVIDER TWO ENDS AND A TAP WITH THE ENDS THEREOF CONNECTED TO BE ENERGIZED BY THE SECOND SENSING COIL. FIRST AND SECOND CONTROLLABLE ELECTRONIC DEVICES EACH HAVING A LOAD CIRCUIT AND A CONTROL CIRCUIT AND WHEREIN EACH CONTROL CIRCUIT HAS AN IMPEDANCE WHICH IS HIGH COMPARED TO THAT OF EACH OF SAID FIRST AND SECOND VOLTAGE DIVIDERS,
References Cited (Backward Citations)
FR881643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |