Patent US2830768A successfully refreshed from Google Patents.
Patent US4102207A successfully refreshed from Google Patents.
US4102207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic ultrasound transducer
Assignee: United States Department of the Air Force
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Filing: 1976-12-16
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Granted: 1978-07-25
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Expires: 1996-12-16
Abstract
Abstract A handheld, compact, self-contained transducer unit for electromagnetic generation and detection of ultrasound on or in metals and other media is realized by mounting short, flat cable sections directly on a small, powerful permanent magnet. The cable sections are interconnected in an electromagnetic transducer circuit configuration and the plane of the flat cable transducer circuit structure is perpendicular to the magnet magnetization axis. Fabrication of the device can be accomplished by selectively connecting the conductor ends of a flat strip electrical conductor segment and affixing the conductor segment to an appropriate surface of a samarium-cobalt permanent magnet.
Inventors
- 👤 Harold M. Frost
- 👤 Thomas L. Szabo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:14
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2412; B; B06; B06B; B06B1/00; B06B1/02; B06B1/04; G01N2291/00; G01N2291/04; G01N2291/042; G01N2291/0423; G01N2291/0426; G01N2291/0427
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
An electromagnetic ultrasound transducer comprising the combination of a flexible permanent magnet, a plurality of flexible multiconductor flat cable segments, the several conductors of each said segment being interconnected to provide a meander type electromagnetic transducer circuit, said flat cable segments being stacked in a contiguous layered arrangement and interconnected to provide a single continuous meander transducer circuit having a terminal at each end thereof, the stack of cable segments being affixed to one surface of said magnet, the magnet magnetization axis being substantially perpendicular to the plane surfaces of said flat cable segments, and means for applying an alternating current signal to said transducer circuit terminals.
Claim 2
Dependent Claim
107 words
An electromagnetic ultrasound transducer comprising the combination of a flexible permanent magnet, a plurality of flexible multiconductor flat cable segments, the several conductors of each said segment being interconnected to provide a meander type electromagnetic transducer circuit, said flat cable segments being stacked in a contiguous layered arrangement and interconnected to provide a single continuous meander transducer circuit having a terminal at each end thereof, the stack of cable segments being affixed to one surface of said magnet, the magnet magnetization axis being substantially perpendicular to the plane surfaces of said flat cable segments, and means for applying an alternating current signal to said transducer circuit terminals.
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) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |