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US4876420A Expired / Lapsed US ⏱️ 0.0 years remaining

Continuous flexible electric conductor capable of functioning as an electric switch

Assignee: LEDA Logarithmic Electrical Devices for Automation Srl
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Filing: 1988-06-02
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Granted: 1989-10-24
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Expires: 2008-06-02
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Abstract

Abstract A conductor comprising a first elongated electric conducting element; a spacer element formed from insulating material and placed over the surface of the first conducting element, so as to shield all but given portions of the aforementioned surface; a second tubular electric conducting element placed over the outside of the aforementioned spacer element; a third tubular electric conducting element placed over the outside of the aforementioned second element; and a tubular insulating sheath placed over the outside of the aforementioned third conducting element. The structure of the aforementioned second conducting element comprises a supporting matrix formed from flexible, electrically-insulating material and particles of electrically-conductive material scattered in random, substantially uniform manner inside cells on the aforementioned matrix; which cells communicate at least partially with one another, and are at least partially larger in size than the respective particles of electrically-conductive material housed inside the same.

Inventors

  • 👤 Paolo Lodini

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 23:23
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/10; H01B7/104; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/029; H01H3/00; H01H3/02; H01H3/14; H01H3/141; H01H3/142

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 156 words
A continuous, flexible electric conductor, characterised by the fact that it comprises a first elongated electric conducting element; a spacer element formed from insulating material and placed over the surface of the said first conducting element, so as to shield all but given portions of the said surface; a second tubular electric conducting element placed over the outside of the said spacer element; a third tubular electric conducting element placed over the outside of the said second element; and a tubular insulating sheath placed over the outside of the said third conducting element; the structure of the said second conducting element comprising a supporting matrix formed from flexible electrically-insulating material and particles of electrically-conductive material scattered in random, substantially uniform manner inside cells on the said matrix; said cells communicating at least partially with one another, and being at least partially larger in size than the respective particles of said electrically-conductive material housed inside the same.
Claim 2
Dependent Claim 156 words
A continuous, flexible electric conductor, characterised by the fact that it comprises a first elongated electric conducting element; a spacer element formed from insulating material and placed over the surface of the said first conducting element, so as to shield all but given portions of the said surface; a second tubular electric conducting element placed over the outside of the said spacer element; a third tubular electric conducting element placed over the outside of the said second element; and a tubular insulating sheath placed over the outside of the said third conducting element; the structure of the said second conducting element comprising a supporting matrix formed from flexible electrically-insulating material and particles of electrically-conductive material scattered in random, substantially uniform manner inside cells on the said matrix; said cells communicating at least partially with one another, and being at least partially larger in size than the respective particles of said electrically-conductive material housed inside the same.
Claim 3
Dependent Claim 32 words
An electric conductor as claimed in claim 1, characterised by the fact that the said spacer element consists of a tape wound about the said surface of the said first conducting element.
Claim 4
Dependent Claim 25 words
An electric conductor as claimed in claim 1, characterised by the fact that the said first conducting element consists of a number of metal wires.
Claim 5
Dependent Claim 27 words
An electric conductor as claimed in claim 1, characterised by the fact that the said third conducting element consists of a metal plait defining a tubular casing.

References Cited (Backward Citations)

US4258100A Cited
US4172216A Cited
US4317970A Cited
US4529959A Cited
US4570149A Cited
US4757297A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-10-23 1993-04-24 1993-10-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-10-23 1997-04-24 1997-10-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-10-23 2001-04-24 2001-10-24 $7700.00 Window Closed / Lapsed

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