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US3554013A
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Pulse-echo ultrasonic thickness gauge with error prevention circuit
Assignee: Branson Ultrasonics Corp
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Filing: 1969-07-22
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Granted: 1971-01-12
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Expires: 1989-07-22
Abstract
Abstract A PULSE-ECHO ULTRASONIC TICKNESS GAUGE FOR A WORKPIECE MEASURES THE TIME INTERVAL BETWEEN THE SENDING OF AN ULTRASONIC SEARCH PULSE AND THE RECEIPT OF A REAR SURFACE RESPONSIVE ECHO PULSE. A SPECIAL CIRCUIT IS PROVIDED FOR ANALYZING THE AMPLITUDE OF THE ECHO PULSE TO DETERMINE WHETHER SUCH ECHO PULSE IS CAUSED BY A SINGLE OR MULTIPLE REFLECTION OF ACOUSTIC ENERGY WITHIN THE WORKPIECE. IF THE CONDITION OF MULTIPLE REFLECTION EXISTS, THE INDICATION OF THICKNESS IS SUPPRESSED.
Inventors
- 👤 Jerry Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:34
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/14; G01B; G01B17/00; G01B17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |