US3963980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic instrument for non-destructive testing of articles with current-conducting surface
Assignee: Individual
•
Filing: 1973-08-29
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Granted: 1976-06-15
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Expires: 1993-08-29
Abstract
Abstract An instrument comprising a generator feeding an electromagnetoacoustic transducer whose signals are applied to recording system. The transducer has at least one inductance coil; arranged between the latter and an article being tested is a member with a current-conducting surface making up a closed loop, one portion thereof is inductively connected to the coil, where as the other portion is arranged close to the surface of the article being tested. Said member is made of a durable material in order to protect the coil from mechanical damage.
Inventors
- 👤 Jury Mikhailovich Shkarlet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:19
CPC Classifications
G; G01; G01B; G01B17/00; G01B17/02; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2412; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02854
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
196 words
An ultrasonic instrument for non-destructive testing of articles with a current-conducting surface, comprising: a generator generating current pulses; an electromagnetoacoustic transducer connected to said generator and having at least one inductance coil; a member with a current-conducting surface making up a closed loop, arranged between the inductance coil of said transducer and an article being tested in such a way that one portion of said surface of that member is inductively connected to said inductance coil and the other is arranged close to the surface of the article being tested; said member being made of a mechanically durable material in order to protect said inductance coil from mechanical damage; a recording system connected to said transducer and receiving signals from it, the member with a current-conducting surface being in the form of a cylinder, with the current-conducting surface thereof being formed by the lateral surface of that cylinder wound upon which is an inductance coil and by a channel provided in the zone of the winding of that coil which is opened at least at one of the end faces of the cylinder and communicates with the lateral surface thereof by means of a longitudinal slot.
Claim 2
Dependent Claim
196 words
An ultrasonic instrument for non-destructive testing of articles with a current-conducting surface, comprising: a generator generating current pulses; an electromagnetoacoustic transducer connected to said generator and having at least one inductance coil; a member with a current-conducting surface making up a closed loop, arranged between the inductance coil of said transducer and an article being tested in such a way that one portion of said surface of that member is inductively connected to said inductance coil and the other is arranged close to the surface of the article being tested; said member being made of a mechanically durable material in order to protect said inductance coil from mechanical damage; a recording system connected to said transducer and receiving signals from it, the member with a current-conducting surface being in the form of a cylinder, with the current-conducting surface thereof being formed by the lateral surface of that cylinder wound upon which is an inductance coil and by a channel provided in the zone of the winding of that coil which is opened at least at one of the end faces of the cylinder and communicates with the lateral surface thereof by means of a longitudinal slot.
Claim 3
Dependent Claim
29 words
An instrument as claimed in claim 1, having a magnet, whereas the member is made of a ferromagnetic material and connected to at least one pole of said magnet.
Claim 4
Dependent Claim
42 words
An instrument as claimed in claim 1, wherein the end face of the cylinder, at which the channel opens, faces an article being tested, whereas the surface of the end face is equidistant relative to the surface of the article being tested.
Claim 5
Dependent Claim
39 words
An instrument as claimed in claim 3, wherein the end face of the cylinder on the side of an article being tested is reduced to a truncated cone, the smaller base of that cone facing the article being tested.
Claim 6
Dependent Claim
33 words
An instrument as claimed in claim 3, wherein the channel is through, with the second end thereof opening at the lateral surface of the cylinder, the other end face serving for fastening thereof.
Claim 7
Dependent Claim
48 words
An instrument as claimed in claim 1, wherein the channel is through, opens at both ends of the cylinder and is designed for an article being tested to be placed inside it, with the surface of that channel being equidistant relative to that of the article being tested
Claim 8
Dependent Claim
44 words
An instrument as claimed in claim 6, wherein at least one of the end faces of the cylinder is provided with an inner recess which reduces the length of the channel, as compared to that of the generatrix of the surface of the cylinder.
Claim 9
Dependent Claim
47 words
An instrument as claimed in claim 1, wherein the member with a current-conducting surface is provided with two communicating openings, with the inductance coil disposed in one thereof, whereas the other is designed for an article being tested to be placed either in it or near it.
References Cited (Backward Citations)
SU219218A1
Cited
US2467306A
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GB594158A
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GB991890A
Cited
US3361960A
Cited
JPS4411404Y1
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |