Patent US3857091A successfully refreshed from Google Patents.
US3857091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus having ultrasonic transducer for detecting cable dielectric faults
Assignee: Continental Copper and Steel Industries Inc
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Filing: 1972-07-24
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Granted: 1974-12-24
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Expires: 1992-07-24
Abstract
Abstract Apparatus for precisely and non-destructively locating dielectrical faults in a length of multiconductor cable. The cable is transferred continuously from a supply to a take-up reel through an anechoic chamber while its terminal end is electrified by a high potential source through a ring and brush assembly. A probe, connected to an ultrasonic transducer, is held close to the surface of the cable as it is being rewound. When the defect being sought passes under the probe, the spark associated with that defect is rendered instantly audible by an alarm actuated by the transducer.
Inventors
- 👤 S Kalifon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/14; G01R; G01R31/00; G01R31/08; G01R31/50; G01R31/58; G01R31/59
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable comprising a supply reel; a take-up reel; an anechoic chamber having inlet and outlet orifices; said cable being supplied from said supply reel through said inlet orifice of said anechoic chamber to said take-up reel from the outlet orifice; a source of high potential connected between the faulty conductor and another conductor at one end of said multiconductor cable and adapted to cause sparking effects adapted to produce high frequency sound waves at uninsulated conductor segments of the cable in the region between the two reels and within the anechoic chamber; a probe sensitive to high frequency sound waves mounted within said anechoic chamber; clamp means and guide means to position and guide said cable to maintain a predetermined spacing and separation of the cable within the said chamber relative to the said probe, and audio means coupled to said probe means for producing an audible signal when said dielectric fault is detected at the uninsulated cable portion within the chamber.
Claim 2
Independent Claim
174 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable comprising a supply reel; a take-up reel; an anechoic chamber having inlet and outlet orifices; said cable being supplied from said supply reel through said inlet orifice of said anechoic chamber to said take-up reel from the outlet orifice; a source of high potential connected between the faulty conductor and another conductor at one end of said multiconductor cable and adapted to cause sparking effects adapted to produce high frequency sound waves at uninsulated conductor segments of the cable in the region between the two reels and within the anechoic chamber; a probe sensitive to high frequency sound waves mounted within said anechoic chamber; clamp means and guide means to position and guide said cable to maintain a predetermined spacing and separation of the cable within the said chamber relative to the said probe, and audio means coupled to said probe means for producing an audible signal when said dielectric fault is detected at the uninsulated cable portion within the chamber.
Claim 3
Dependent Claim
38 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable as set forth in claim 1, comprising a ring and brush assembly connecting said source of high potential to said end of said multiconductor cable.
Claim 4
Dependent Claim
48 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable as set forth in claim 1, wherein the probe within the chamber is located near the surface of the cable and is sensitive to the sparking effects produced when voltage is applied to the cable.
Claim 5
Dependent Claim
31 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable as set forth in claim 3, comprising an ultrasonic transducer connected between said probe and said audio means.
Claim 6
Dependent Claim
26 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable as set forth in claim 4, wherein said audio means is a headphone.
Claim 7
Dependent Claim
26 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable as set forth in claim 4, wherein said audio means is a loudspeaker.
Claim 8
Dependent Claim
34 words
An apparatus for detecting and locating a dielectric fault within a multiconductor cable as set forth in claim 1, wherein said source of potential supplies a voltage in the range of 500-1,500 D.C. volts.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |