Low noise signal transmission cable
AssigneeW. L. Gore & Associates, Inc.
InventorsDavid T. Singles, Grant Walter, William P. Mortimer, Jr.
Life of this patent
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Abstract
An improved low noise electrical signal transmission cable is disclosed. The cable employs an insulative layer of expanded polytetrafluoroethylene (PTFE) which is bonded in fixed relative position with a surrounding shield layer through use of an adhesive, such as fluorinated ethylenepropylene (FEP) or perfluoroalkoxy polymer (PFA). The bonding process reduces the separation of layers which can sometimes occur with expanded PTFE insulative cables and avoids the generation of unwanted triboelectric signals that can result from such separation.
Claims13
A cable for transmission of electrical signals which comprises:
- a conductor;
- an insulative layer surrounding the conductor;
- a shield layer surrounding the insulative layer;
- wherein an adhesive bonds the insulative layer in relative position with the shield layer to resist separation and relative movement between the insulative layer and the shield layer during use and to avoid triboelectric currents which can result from such movement;
- and
- wherein the adhesive comprises a fluoropolymer adhesive.
A cable for transmission of electrical signals which comprises:
- a conductor;
- an insulative layer surrounding the conductor;
- a shield layer surrounding the insulative layer;
- wherein an adhesive bonds the insulative layer in relative position with the shield layer to resist separation and relative movement between the insulative layer and the shield layer during use and to avoid triboelectric currents which can result from such movement;
- and
- wherein the cable includes a semi-conductive layer between the insulative layer and the shield layer to assist in dissipating triboelectric currents.
A cable for transmission of electrical signals which comprises:
- a conductor;
- an insulative layer surrounding the conductor;
- a shield layer surrounding the insulative layer;
- wherein an adhesive bonds the insulative layer in relative position with the shield layer to resist separation and relative movement between the insulative layer and the shield layer during use and to avoid triboelectric currents which can result from such movement;
- and
- wherein the adhesive comprises:
- a fluorinated ethylenepropylene (FEP) adhesive layer laminated to the insulative layer;
- and
- a perfluoroalkoxy polymer (PFA) adhesive embedded within the expanded PTFE.
A cable for transmission of electrical signals which comprises:
- a conductor;
- an insulative layer surrounding the conductor;
- a shield layer surrounding the insulative layer;
- wherein an adhesive bonds the insulative layer in relative position with the shield layer to resist separation and relative movement between the insulative layer and the shield layer during use and to avoid triboelectric currents which can result from such movement;
- and
- wherein the adhesive bonds the insulative layer so as to resist relative movement both between the insulative layer an the conductor and between the insulative layer and the shield.
Dependencies are inferred from the claim text.