US3718855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eddy current flaw detection system
Assignee: Individual
•
Filing: 1970-11-30
•
Granted: 1973-02-27
•
Expires: 1990-11-30
Abstract
Abstract An automatic eddy current flaw detection system including a measuring instrument with a chart recorder and a flaw sensing device having an eddy current probe in a housing attached to the work piece and driven by a reversible motor along a helical path into an opening in the work piece. The housing contains a standard calibration unit which the probe passes and thereby allows for instrument standarization facilitating the reproducibility of inspection conditions.
Inventors
- 👤 J Scalese
- 👤 A Rogel
- 👤 R Cordova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:20
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9093; G01N27/9013; G01N27/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
An apparatus to perform the non-destructive testing of metals comprising: a universal planular mounting bracket; a housing; attaching means mounted on the universal mounting bracket for removably securing the housing to said bracket; spindle means mounted in said housing and adapted to have a sliding engagement with the housing along its longitudinal axis; an eddy current test instrument secured within said spindle means and extending along the longitudinal axis thereof; gear housing means secured to said housing; drive means secured to the gear housing, gears secured to the said drive means and said spindle through which the drive means may cause the spindle to achieve a rotary motion.
Claim 2
Independent Claim
108 words
An apparatus to perform the non-destructive testing of metals comprising: a universal planular mounting bracket; a housing; attaching means mounted on the universal mounting bracket for removably securing the housing to said bracket; spindle means mounted in said housing and adapted to have a sliding engagement with the housing along its longitudinal axis; an eddy current test instrument secured within said spindle means and extending along the longitudinal axis thereof; gear housing means secured to said housing; drive means secured to the gear housing, gears secured to the said drive means and said spindle through which the drive means may cause the spindle to achieve a rotary motion.
Claim 3
Dependent Claim
35 words
An apparatus to perform the non-destructive testing of metals according to claim 1 including: centering means adapted to be removably secured in the attaching means for positioning the universal bracket means on a work piece.
Claim 4
Dependent Claim
56 words
An apparatus to perform the non-destructive testing of metals according to claim 1 wherein: said housing is provided with threads on an internal surface and said spindle means is provided with threads on an external surface wherein said external threads engage said internal threads causing the spindle to move with a helical motion upon being rotated.
Claim 5
Dependent Claim
93 words
An apparatus to perform the non-destructive testing of metals according to claim 1 including, means for securing the test instrument comprising: a pair of blocks which when placed together along their longitudinal axis form a cylinder, and having an opening therein to grasp a test instrument; and a pair of O-rings located around said blocks to hold the blocks in position and to engage the side walls of said spindle in a tight sliding fit whereby said testing instrument will slide along the walls of the spindle if a force is applied thereto.
Claim 6
Dependent Claim
35 words
An apparatus to perform the non-destructive testing of metals according to claim 1 wherein, one end of said test instrument is split to allow for adjustment of the instrument to test pieces of varying size.
Claim 7
Dependent Claim
33 words
An apparatus to perform the non-destructive Testing of metals according to claim 1 including, a calibration standard mounted in the attaching means and through which the test instrument must pass prior to testing.
Claim 8
Dependent Claim
27 words
An apparatus to perform the non-destructive testing of metals according to claim 6 wherein, said calibration standard is provided with means for perturbing the test instrument output.
Claim 9
Dependent Claim
22 words
An apparatus to perform the non-destructive testing of metals according to claim 1 wherein, said drive means is a reversible synchronous motor.
Claim 10
Dependent Claim
57 words
An apparatus to perform the non-destructive testing of metals according to claim 1 including, a normally open switch mounted on said gear housing said switch having an arm in contact with the spindle means, said spindle means having a switch activating means thereon whereby each time the spindle means completes one revolution said switch will momentarily close.
References Cited (Backward Citations)
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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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |