Multiple sheath cable and method of manufacture
First Claim
1. A method of manufacturing multiple sheath cable in long lengths comprising the steps of:
- (a) applying a first continuous metal sheath to an insulated conductor of the desired length;
(b) splicing the first continuous metal sheath at locations radially and longitudinally spaced from any conductor splice joints;
(c) reducing the diameter of the first metal sheath to tightly grip the insulated conductor; and
(d) applying second and subsequent metal sheaths to the first sheath repeating steps (a), (b) and (c).
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Accused Products
Abstract
A multiple sheath cable for telemetry, heating and communications and methods of manufacturing such cable in long lengths with high tensile strength. The telemetry and communications cable may be of the wire type for conducting electrical signals or fiber optics for conducting laser or other optical signal, the conductors being typically insulated by mineral insulation material or organic insulation material. These insulated conductors are provided with concentric multiple layers of metal tubular sheaths having staggered weld joints for increasing tensile strength while protecting the conductors and the insulation from extreme environmental conditions such as heat, pressure and corrosion.
46 Citations
9 Claims
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1. A method of manufacturing multiple sheath cable in long lengths comprising the steps of:
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(a) applying a first continuous metal sheath to an insulated conductor of the desired length; (b) splicing the first continuous metal sheath at locations radially and longitudinally spaced from any conductor splice joints; (c) reducing the diameter of the first metal sheath to tightly grip the insulated conductor; and (d) applying second and subsequent metal sheaths to the first sheath repeating steps (a), (b) and (c). - View Dependent Claims (2, 3, 4, 5)
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6. A method of manufacturing multiple sheath mineral insulated cable in long lengths comprising the steps of:
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(a) splicing together in end-to-end relationship, a plurality of metal jacketed mineral insulated cable segments containing at least one conductor; (b) applying a first continuous metal sheath to said mineral insulated cable; (c) splicing the metal sheath at locations radially and longitudinally spaced from any splice joints of the mineral insulated cable; (d) reducing the diameter of the first metal sheath to tightly grip the mineral insulated cable; (e) applying second and subsequent metal sheaths to the first sheath by repeating steps (b), (c) and (d). - View Dependent Claims (7, 8, 9)
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Specification