US3419797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nondestructive eddy current testing device for testing metal tubing and instantaneously displaying the cross section of said tubing
Assignee: United States Atomic Energy Commission
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Filing: 1966-01-21
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Granted: 1968-12-31
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Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 Hugo L Libby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:24
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9073; G01N27/908; G01N27/9046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
AN EDDY CURRENT NONDESTRUCTIVE TESTING DEVICE FOR TESTING METAL TUBING COMPRISING A PROBE COIL, MEANS FOR ROTATING SAID PROBE COIL WITH RESPECT TO A SURFACE OF SAID METAL TUBING, MEANS FOR APPLYING A MULTIDIMENSIONAL EXCITATION CURRENT TO SAID PROBE COIL, MEANS FOR EXPANDING THE RECEIVED SIGNAL OF SAID PROBE COIL INTO INDIVIDUAL COMPONENTS, EACH OF SAID COMPONENTS REPRESENTING AN INDIVIDUAL PARAMETER OF SAID TUBING, AN OSCILLOSCOPE HAVING A BLANKED RADIAL SWEEP, MEANS FOR ROTATING THE RADIAL SWEEP OF SAID OSCILLOSCOPE SYNCHRONOUSLY WITH THE ROTATION OF SAID PROBE COIL, MEANS SYNCHRONIZED WITH THE RADIAL SWEEP OF SAID OSCILLOSCOPE FOR SAMPLING DURING THE PERIOD OF EACH RADIAL SWEEP OF SAID OSCILLOSCOPE EACH OF SAID COMPONENT SIGNALS TO PRODUCE FROM EACH COMPONENT SIGNAL A PULSE HAVING A TIME OF GENERATION PROPORTIONAL TO THE AMPLITUDE OF THE ASSOCIATED COMPONENT SIGNAL, MEANS FOR MULTIPLEXING SAID PULSES GENERATED DURING EACH RADIAL
Claim 2
Dependent Claim
145 words
AN EDDY CURRENT NONDESTRUCTIVE TESTING DEVICE FOR TESTING METAL TUBING COMPRISING A PROBE COIL, MEANS FOR ROTATING SAID PROBE COIL WITH RESPECT TO A SURFACE OF SAID METAL TUBING, MEANS FOR APPLYING A MULTIDIMENSIONAL EXCITATION CURRENT TO SAID PROBE COIL, MEANS FOR EXPANDING THE RECEIVED SIGNAL OF SAID PROBE COIL INTO INDIVIDUAL COMPONENTS, EACH OF SAID COMPONENTS REPRESENTING AN INDIVIDUAL PARAMETER OF SAID TUBING, AN OSCILLOSCOPE HAVING A BLANKED RADIAL SWEEP, MEANS FOR ROTATING THE RADIAL SWEEP OF SAID OSCILLOSCOPE SYNCHRONOUSLY WITH THE ROTATION OF SAID PROBE COIL, MEANS SYNCHRONIZED WITH THE RADIAL SWEEP OF SAID OSCILLOSCOPE FOR SAMPLING DURING THE PERIOD OF EACH RADIAL SWEEP OF SAID OSCILLOSCOPE EACH OF SAID COMPONENT SIGNALS TO PRODUCE FROM EACH COMPONENT SIGNAL A PULSE HAVING A TIME OF GENERATION PROPORTIONAL TO THE AMPLITUDE OF THE ASSOCIATED COMPONENT SIGNAL, MEANS FOR MULTIPLEXING SAID PULSES GENERATED DURING EACH RADIAL
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |