Elastic fabric with sinusoidally disposed wires

• US 7,337,810 B2
• Filed: 04/07/2005
• Issued: 03/04/2008
• Est. Priority Date: 04/07/2005
• Status: Active Grant

• Current Assignee: Woven Electronics LLC (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Woven Electronics Corporation
• Inventors: Orr, Lawrence William, Hammett, Katie Richards, Barnett, Connie
• Primary Examiner(s): Muromoto, Jr.; Robert H
• Application Number:
  US11/100,989
• Publication Number:
  US 20060228970A1
• Time in Patent Office: 1,062 Days
• Field of Search: 139/408, 139/420.R, 139/421, 139/422, 139/423, 139/425.R, 139/426.R
• US Class Current: 139/421
• CPC Class Codes: D03D 11/02 Fabrics formed with pockets, tubes, loops, folds, tucks or flaps fabrics consisting of a single tube D03D3/02
• CPC Class Codes: D04H 3/05 in another pattern, e.g. zig-zag, sinusoidal D04H3/04 takes precedence
• CPC Class Codes: D10B 2401/16 antistatic; conductive
• CPC Class Codes: Y10S 2/905 Electric
• CPC Class Codes: Y10T 442/60 Nonwoven fabric [i.e., nonwoven strand or fiber material]
• CPC Class Codes: Y10T 442/601 Nonwoven fabric has an elastic quality
• CPC Class Codes: Y10T 442/602 Nonwoven fabric comprises an elastic strand or fiber material

Abstract

A fabric for use with a system for monitoring prescribed body functions comprising an elastic fabric, adapted to be carried by a torso, which is stretchable in its longitudinal direction so as to expand and contract in response to body movement and size. The carrier includes at least one conductive and inelastic yarn arranged longitudinally of and located between upper and lower surfaces. The conductive yarn is arranged in sinusoidal configurations longitudinally of the fabric. The conductive yarn breaks through one of the outer surfaces at a selected breakout along the length of the fabric. The conductive yarn is cut to present at least one exposed end above the one outer surface. A monitoring unit, which includes a connector and a sensor, is secured with the one outer surface of the fabric at the breakout with the connector being united with the at least one exposed end of the conductive yarn. The fabric acts to maintain the monitoring unit in a desired stationary position with the body allowing the sensor to sense signals emitted from the torso and transmit these senses signals through the conductive yarns.

Claims

1. An elastic multi-ply woven fabric stretchable from a retracted position into a plurality of elongated positions for use in a physiological sensing system comprising:

a plurality of upper and lower textured elastic warp yarns arranged in vertically spaced positions;

a plurality of elastic warp yarns arranged in transversely spaced positions along an intermediate plane;

at least one inelastic conductive warp yarn extending longitudinally of said fabric in said intermediate plane between said upper and lower warp yarns, said conductive yarn being arranged in controlled sinusoidal configurations;

a plurality of textured elastic core warp yarns extending longitudinally of said fabric along said intermediate plane in transversely spaced positions along opposing sides of said conductive warp yarn;

a plurality of picks of inelastic weft yarn, first ones of said picks weaving with said upper warp yarns and second ones of said picks weaving with said lower warp yarns forming vertically spaced upper and lower outer surfaces across said fabric;

third ones of said picks weaving with said at least one conductive warp yarn, said elastic warp yarns and said core warp yarns between said upper and lower outer surfaces forming an intermediate layer, said third ones of said picks and said core warp yarns and said elastic warp yarns positioning said conductive warp yarn in fixed longitudinal position along said intermediate layer and in sinusoidal configurations of said controlled sinusoidal configurations;

wherein,

said fabric may be extended longitudinally by between about 25% and 125% from its said retracted position into various of said elongated positions causing said controlled sinusoidal configurations of said conductive yarns to be altered consistent with the degree of said extension.

2. The elastic fabric of claim 1 wherein said sinusoidal configurations are controlled to extend along a single plane by said core yarns, said elastic yarns and said second ones of said picks.

3. The elastic fabric of claim 1 including binder upper and lower warp yarns weaving with said upper and lower surfaces binding said upper and lower surfaces with said intermediate layer.

4. The multi-ply woven fabric of claim 1 wherein said elastic warp yarns include yarns having a spandex core wrapped with a textured polyester yarn.

5. The multi-ply woven fabric of claim 1 wherein selected said elastic yarns include a spandex core of about 420 denier.

6. The multi-ply woven fabric of claim 1 wherein certain of said elastic wrap yarns comprise textured synthetic multi-filament yarns.

7. The multi-ply woven fabric of claim 1 further including at least one breakout point where said at least one conductive warp yarns is caused to extend over one of said upper and lower surfaces for a selected distance to form a connector loop.

8. The multi-ply woven fabric of claim 7, including a plurality of said conductive yarns and a plurality of breakout points, where individually said plurality of conductive yarns extend over selected spaced distances of at least one of said upper and lower surfaces.

9. The multi-ply woven fabric of claim 7 wherein there are up to six conductor yarns each forming a connector, said connectors being arranged in spaced longitudinal positions along said fabric surface.

10. The multi-ply woven fabric of claim 1 wherein said fabric is woven in a 60 pick repeating pattern.

11. The multi-ply woven fabric of claim 1 wherein there are at least six conductive warp yarns per weave pattern repeat.

12. The multi-ply woven fabric of claim 11 wherein said conductive yarns are located between core yarns.

13. The multi-ply woven fabric of claim 1 wherein said at least one conductive yarn comprises a wire filament core encased with a non-conductive cover.

14. The multi-ply woven fabric of claim 1 wherein said elastic yarns are arranged in spaced pairs across said fabric.

15. The multi-ply woven fabric of claim 1 wherein a single of said elastic yarns is arranged along each edge of said fabric.

16. The multi-ply woven fabric of claim 1 wherein said elastic yarns are controlled to float over and under a plurality of said third ones of said picks along said intermediate layer.

17. A multi-ply carrier fabric for use in a physiological sensing system comprising:

first, second and third elastic warp yarn groups each interwoven with selected ones of a plurality of picks of weft yarn in a weave pattern forming said fabric with a plurality of longitudinally extending layers;

said first warp yarn group weaving with first ones of said picks forming an upper layer of said layers;

said second warp yarn group weaving with second ones of said picks forming a lower layer of said layers;

said third warp yarn group being arranged between said first and second warp yarn groups and weaving with third ones of said picks forming an intermediate layer;

said third warp yarn group including rubber and conductive yarns arranged in spaced positions across said fabric, said conductive yarns being controlled into sinusoidal configurations;

upper and lower binder warps weaving with said upper and lower layers, said binder warps also weaving with said intermediate layer binding said layers together;

wherein

said sinusoidal configuration provides that said conductive yarn be of sufficient length to move longitudinally with said fabric when expanded and contracted.

18. An elastic multi-ply woven fabric stretchable from a retracted position into a plurality of elongated positions for use in a physiological sensing system comprising:

a plurality of upper and lower textured elastic warp yarns arranged in vertically spaced positions forming upper and lower outer surfaces;

a plurality of upper and lower elastic warp binder yarns arranged in transversely spaced positions;

a plurality of inelastic conductive warp yarns arranged in an intermediate plane between said upper and lower outer surfaces, said conductive yarns being arranged in controlled sinusoidal configurations;

a plurality of textured elastic core warp yarns extending longitudinally of said fabric in said intermediate plane in transversely spaced positions adjacent opposing sides of said conductive warp yarns, said core warp yarns assisting to maintain said conductive warp yarns in spaced sinusoidal positions;

a plurality of picks of weft yarn, first ones of said picks weaving with said upper warp yarns and said warp binder yarns, second ones of said picks weaving with said lower warp yarns and said binder warp yarns, third ones of said picks weaving in said intermediate plane with said conductive yarns, said core warp yarn and said binder warp yarns, forming said fabric of vertically spaced upper, intermediate and lower layers, united by said binder yarns;

wherein

said fabric may be extended longitudinally up to 100% from its retracted position into various of said elongated positions causing said controlled sinusoidal configurations of said conductive yarns to be altered consistent with the degree of said extension.

19. The fabric of claim 18 wherein said weft yarn is inelastic.

20. The fabric of claim 18 wherein said third ones of said picks of said weft yarn assists with said core yarn in shaping said conductive yarns into said sinusoidal shapes.

21. The fabric of claim 18 wherein said fabric includes break-out points at selected longitudinal locations where said conductive yarns extend above and float over selected distances of said outer surface.

22. The fabric of claim 18 wherein said binder warp yarns comprise textured polyester.

23. The fabric of claim 18 wherein said weft yarn is polyester.

24. The fabric of claim 18 wherein said conductive yarns comprise coated wire strands.

25. The fabric of claim 24 wherein said wire strands are 24 gauge.

26. The fabric of claim 18 wherein there are six conductive yarns per weave repeat.

27. A system for monitoring prescribed body functions comprising:

a belt worn over a portion of a torso, said belt comprising a woven, multi-layer composite elastic fabric stretchable in its longitudinal direction so as to expand and contract in response to body movement and size;

said fabric including at least one conductive and inelastic yarn located between inner and outer layers of said belt and positioned in sinusoidal configurations longitudinally thereof;

a breakout of said at least one conductive yarn through at least one of said inner and outer layers positioning exposed ends of said at least one conductive yarn outward of said one layer adjacent its outer surface;

a monitor united with said woven elastic fabric adjacent said at lest one breakout, said monitor being united with at least one of said exposed ends of said conductive yarn at said at least one breakout;

whereby,

said belt maintains said monitoring unit in a desired stationary position about said portion of said torso to sense signals emitted from said torso and to transmit said sensed signals.

28. The system of claim 27 including a PC board secured with said inner layer of said fabric, said PC board having exposed contacts adapted to secure with said exposed end of said at least one conductive yarn, said monitor engaging with said exposed contacts.

29. The system of claim 27 including an insulating pad positioned between said inner surface and said PC board.

30. The system of claim 27 wherein said belt includes at least three of said conductive yarns arranged in spaced positions between said upper and lower layers across said fabric and forming said breakouts through said one layer adjacent its said outer surfaces.

31. The system of claim 30 wherein said system for monitoring includes a carrier adapted to releasably support said monitor, said carrier being secured adjacent breakout on said outer surface of said elastic fabric.

32. The system of claim 30 wherein said breakouts on said inner surface of said elastic fabric are longitudinally spaced, a sensing element having a connector secured with said inner surface adjacent each said inner breakout being connected with said conductive yarn.

33. The system of claim 30 wherein said system for monitoring includes a plurality of sensing elements for sensing body activity arranged in spaced position along said inner surface of said fabric and a monitor for receiving signals from each said sensing element arranged on said outer surfaces of said fabric.

34. The system of claim 33 including a carrier secured with said outer surface of said fabric, said carrier removably supporting said module.