1. In an electrically conductive acoustic matching layer having top and bottom surfaces, each of the top and bottom surfaces substantially in an azimuth and elevation plane when used on a sonic transducer, an improvement comprising:
a conductor aligned relative to the top and bottom surfaces at least partly within the matching layer.
2. The improvement of claim 1 wherein the conductor is aligned perpendicular to the top and bottom surfaces.
3. The improvement of claim 1 wherein the matching layer corresponds to an element of the transducer, the conductor and at least one additional conductor aligned between the top and bottom surfaces within the element.
4. The improvement of claim 1 wherein the matching layer corresponds to an element of the transducer, the conductor positioned closer to an edge of the element than a center of the element along the elevation and azimuth plane of the bottom surface.
5. The improvement of claim 1 wherein the matching layer comprises castable material
6. The improvement of claim 5 wherein the castable material comprises a polymer.
7. The improvement of claim 1 wherein the conductor comprises a conductor material in a via extending from the top surface to the bottom surface.
8. The improvement of claim 7 wherein the conductor material is a metal plating.
9. The improvement of claim 1 wherein the conductor comprises conductive film extending from the top surface to the bottom surface at least partly within the layer.
10. The improvement of claim 9 wherein the conductive film comprises sputtered metal.
11. The improvement of claim 9 wherein the conductor comprises a plurality of enclosed shapes in cross section viewed perpendicular to the azimuth and elevation plane of the top surface.
12. The improvement of claim 9 wherein the matching layer comprises a solid matching layer material, the conductor positioned between separate volumes of the solid matching layer material.
13. The improvement of claim 1 wherein the conductor comprises magnetic particles aligned such that the longest dimension of the magnetic particles is more along a dimension perpendicular than parallel to the top and bottom surfaces.
14. The improvement of claim 13 wherein the magnetic particles comprise a soft magnetic powder.
15. The improvement of claim 1 further comprising a metal layer on each of the top and bottom surfaces.
16. A method for conducting electrical potential through a matching layer having top and bottom surfaces, each of the top and bottom surfaces substantially in an azimuth and elevation plane when used on a sonic transducer, the method comprising:
(a) aligning a conductive material relative to top and bottom surfaces of the matching layer, the conductive material at least in part within the matching layer; and
(b) electrically connecting the conductive material with the transducer.
17. The method of claim 16 wherein (a) comprises aligning the conductor perpendicular to the top and bottom surfaces.
18. The method of claim 16 further comprising:
(c) providing the conductive material in a plurality of paths between the top and bottom surfaces for each of a plurality of elements of the ultrasound transducer.
19. The method of claim 16 further comprising:
(c) providing the conductive material in a path between the top and bottom surfaces at an edge of an element of the ultrasound transducer wherein a center of the element is free of electrically conductive paths.
20. The method of claim 16 wherein (a) comprises aligning the conductive material in the matching layer of castable material.
21. The method of claim 16 wherein (a) comprises:
(a1) forming at least one via in the matching layer, the via extending between the top and bottom surfaces; and
(a2) providing the conductive material in the via.
22. The method of claim 21 wherein (a2) comprises one of: plating, filling and coating the via with a metal layer.
23. The method of claim 16 wherein (a) comprises:
(a1) forming interior surfaces within the matching layer;
(a2) positioning the conductive material on the interior surfaces; and
(a3) filling a part of the matching layer associated with the interior surfaces.
24. The method of claim 23 wherein (a1) comprises dicing the matching layer, the dicing providing kerfs with side walls comprising the interior surfaces, (a2) comprises one of sputter, depositing and plating a metal film on the interior surfaces and (a3) comprises filling the kerfs.
25. The method of claim 23 wherein (a1) comprises molding a portion of the matching layer.
26. The method of claim 23 wherein (a1) comprises forming a crossing pattern of interior surfaces in the azimuth and elevation dimensions.
27. The method of claim 16 wherein (a) comprises:
(a1) providing magnetic particles within a castable material; and
(a2) providing a magnetic field extending more perpendicular than parallel to the top and bottom surfaces.
28. The method of claim 16 further comprising:
(c) forming a metal layer on each of the top and bottom surfaces.
29. The method of claim 16 wherein (a) comprises
(a1) combining alternate conductive and non-conductive material layers; and
(a2) sectioning perpendicular to layers of conductive material
30. The method of claim 29 further comprising:
(c) applying the conductive layer to the non-conductive layer prior to combining.
31. The method of claim 16 wherein (a) comprises aligning the conductive layer which is not planar.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A building panel having an edge portion provided with a groove, in which a tongue formed as a separate part is received, wherein the tongue comprises at least two bow shaped protrusions at a first long edge of the tongue, and wherein the protrusions are arranged bendable in the groove.
2. The building panel as claimed claim 1, wherein the tongue has a second long edge, which extends outside the groove.
3. The building panel as claimed claim 2, wherein the second long edge is essentially straight over substantially the whole length of the tongue.
4. A building panel as claimed in claim 2, wherein the tongue presents a recess.
5. A building panel as claimed in claim 4, wherein a space is formed by said recess and a bottom of the groove, and wherein a portion of the tongue is bendable into said space.
6. A building panel as claimed in claim 1, wherein a part of the protrusions extends outside the groove.
7. A building panel as claimed in claim 1, wherein the tongue presents a sliding surface, which is inclined relative to a main plane of the building panel.
8. A building panel as claimed in claim 1, wherein said tongue is of an elongated shape and made of moulded plastic wherein the tongue comprising at least two protrusions at the first long edge of the tongue, and
wherein the protrusions are bendable in a plane parallel to the upper surface of the tongue and extending essentially in the parallel plane and,
wherein the tongue has a second long edge, which is essentially straight over substantially the whole length of the tongue.
9. The building panel as claimed in claim 8, wherein there is an angle between the protrusions and the longitudinal direction of the tongue.
10. The building panel as claimed in claim 8, wherein the tongue is arranged displaceable in the groove.
11. The building panel as claimed in claims 10, wherein the protrusions are configured to extend into the groove of the building panel.
12. The building panel as claimed in claim 1, wherein the first long edge of the tongue comprising a recess at each protrusion.
13. The building panel as claimed in claim 12, wherein the size of the recess is adapted to the size of the protrusion.
14. The building panel as claimed in claim 3, wherein the second edge of the tongue is continuous.
15. The building panel as claimed in claim 1, wherein an upper and a lower surface of the tongue are displacement surfaces.
16. The building panel as claimed in claims 15, wherein the upper surface andor the lower surface hashave a bevelled edge, presenting a sliding surface and an inclined locking surface, respectively.
17. The building panel as claimed in claim 1, wherein a vertical protrusion is arranged at the upper side andor at the lower side of the horizontal protrusions.
18. The building panel as claimed in claim 17, wherein the vertical protrusion is arranged close to or at the tip of horizontal protrusions.
19. The building panel as claimed in claim 1, wherein tongue is made PP or POM, and reinforced with fibres.
20. The building panel as claimed in claim 19, wherein the fibres are glass fibres.
21. The building panel as claimed in claim 2, wherein the groove is made of a different material than the core of the panel.
22. The building panel as claimed in claim 1, wherein the length of the protrusion is larger than the total width of the tongue, whereby the total width is the width of the tongue plus the distance, perpendicular to the length direction of the tongue, from the tongue body to the tip of the protrusion.
23. The building panel as claimed in claim 22, wherein the length of the protrusion is larger than two times the total width (2*TW).
24. The building panel as claimed in claim 1 wherein force to compress the tongue 1 mm in the width direction per 100 mm length of the tongue is about 20 to about 30 N.