US3714558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic sensor for detecting breaks in a steel rope including multiplier for eliminating noise
Assignee: Crucible SA
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Filing: 1970-09-02
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Granted: 1973-01-30
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Expires: 1990-09-02
Abstract
Abstract Apparatus for detecting wires in a steel wire winding rope in which the rope is passed through a magnetic field and sensing coils are employed to detect any magnetic dipoles created between the ends of broken wires in the rope. In order to minimize the effect of noise on the ultimate recordings the outputs of the sensing coils are multiplied in an analogue multiplier.
Inventors
- 👤 L Swanepoel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:48
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
Apparatus for detecting broken wires in a steel wire winding rope including a cylindrical magnet through which the rope is passed, at least two sensing coils surrounding the rope within the magnet and both lying in a plane perpendicular to the axis of the rope and adapted to detect the presence in the rope of any magnetic dipoles due to broken wires, mEans to multiply the output of one sensing coil by the output of the other sensing coil, said multiplying means effectively eliminating other random signals produced by defects in said wires, and means to display the multiplied outputs.
Claim 2
Dependent Claim
100 words
Apparatus for detecting broken wires in a steel wire winding rope including a cylindrical magnet through which the rope is passed, at least two sensing coils surrounding the rope within the magnet and both lying in a plane perpendicular to the axis of the rope and adapted to detect the presence in the rope of any magnetic dipoles due to broken wires, mEans to multiply the output of one sensing coil by the output of the other sensing coil, said multiplying means effectively eliminating other random signals produced by defects in said wires, and means to display the multiplied outputs.
Claim 3
Dependent Claim
100 words
Apparatus for detecting broken wires in a steel wire winding rope including a cylindrical magnet through which the rope is passed, at least two sensing coils surrounding the rope within the magnet and both lying in a plane perpendicular to the axis of the rope and adapted to detect the presence in the rope of any magnetic dipoles due to broken wires, mEans to multiply the output of one sensing coil by the output of the other sensing coil, said multiplying means effectively eliminating other random signals produced by defects in said wires, and means to display the multiplied outputs.
Claim 4
Dependent Claim
100 words
Apparatus for detecting broken wires in a steel wire winding rope including a cylindrical magnet through which the rope is passed, at least two sensing coils surrounding the rope within the magnet and both lying in a plane perpendicular to the axis of the rope and adapted to detect the presence in the rope of any magnetic dipoles due to broken wires, mEans to multiply the output of one sensing coil by the output of the other sensing coil, said multiplying means effectively eliminating other random signals produced by defects in said wires, and means to display the multiplied outputs.
Claim 5
Dependent Claim
41 words
Apparatus as claimed in claim 1 in which the multiplying means is of the type which produces no output when only one input exists by itself yet does not double the frequency when identical pulses are applied to its two inputs.
Claim 6
Dependent Claim
66 words
Apparatus as claimed in claim 1 comprising amplifiers for applying the outputs of the two sensing coils to the multiplying means, and means responsive to the speed of the rope for adjusting the gain of said amplifiers thereby providing for an amplification which is inversely proportioned to the rope speed so that the outputs of the amplifiers to the multiplying means are independent of rope speed.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |