US3783180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluted cable
Assignee: International Standard Electric Corp
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Filing: 1972-06-13
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Granted: 1974-01-01
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Expires: 1992-06-13
Abstract
Abstract A cable includes at least one elongated groove formed in the insulation around a conductor to provide radial and helical passages for impregnation by a viscous material such as wax. This is used for wire-guided devices connected to insulated conductors which are wound on reels of multi-layer close helical coils. The wax temporarily holds the turns together to permit the conductor to be paid off from the center of the reel without disturbing adjacent turns. The grooves permit the wax to penetrate into the gaps between the helical insulated conductors.
Inventors
- 👤 L Spicer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:30
CPC Classifications
H; H01; H01F; H01F5/00; H01F5/06; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4439; G02B6/4457; H01B; H01B7/00; H01B7/17; H01B7/18; H01B7/184
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
A close wound helical multi-layer coil comprising a continuous elongated member of solid extruded insulating material having a cross-section which is substantially circular and having a plurality of separate parallel grooves spaced around the outer peripheral surface, each of said grooves extending continuously along the full length of said member, said member including a continuous elongated electrical conductor embedded in said insulating material, said member and conductor being wound into a coil including a plurality of close wound adjacent turns and layers of turns having gaps between the outer peripheral surfaces of said adjacent turns, and a viscous adherent material filling said gaps, said grooves providing both radial and helical passages between adjacent turns and layers for impregnation of said viscous material into said coil, said viscous material being solid at a predetermined temperature to hold said coil turns together until being paid-off.
Claim 2
Dependent Claim
143 words
A close wound helical multi-layer coil comprising a continuous elongated member of solid extruded insulating material having a cross-section which is substantially circular and having a plurality of separate parallel grooves spaced around the outer peripheral surface, each of said grooves extending continuously along the full length of said member, said member including a continuous elongated electrical conductor embedded in said insulating material, said member and conductor being wound into a coil including a plurality of close wound adjacent turns and layers of turns having gaps between the outer peripheral surfaces of said adjacent turns, and a viscous adherent material filling said gaps, said grooves providing both radial and helical passages between adjacent turns and layers for impregnation of said viscous material into said coil, said viscous material being solid at a predetermined temperature to hold said coil turns together until being paid-off.
Claim 3
Dependent Claim
14 words
The coil as claimed in claim 1, wherein said viscous adherent material is wax.
Claim 4
Dependent Claim
19 words
The coil as claimed in claim 1, wherein said electrical conductor is copper and said insulating material is polyethylene.
Claim 5
Dependent Claim
18 words
The coil as claimed in claim 1, including four grooves equispaced in helical paths around said insulating material.
References Cited (Backward Citations)
US3077514A
Cited
US3100136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |