Abstract: A mattress has a main sleep area surrounded by a perimeter trim. Both the main sleep area and the perimeter trim are formed from wire springs contained within pockets of soft material. The wire springs in the sleep area are arranged in honeycomb nested rows. The wire springs of the perimeter trim, which are of different wire construction with different flex characteristic from the wire springs in the main sleep area, are arranged in side by side rows which are not honeycomb nested. In addition, the wire springs of the perimeter trim are pivotally linked directly to one another across the perimeter trim, both widthwise and lengthwise of the mattress which produces an essentially non-feelable flex transition between the perimeter trim and the main sleep area of the mattress.

Abstract: Disclosed is a dielectric cable having two tubes separated by a web, one tube holding at least one light waveguide therein and the other tube holding a material which creates a magnetic field capable of above ground detection when the cable is buried.