Moisture responsive pad for treatment of enuresis

Claim 1

A moisture responsive pad for signaling involuntary emission of droplets of urine when worn by a user and used in combination with an electrically activated signaling apparatus, comprising: a central insulating layer formed as a sheet of flexible, nonabsorbent closed cell elastomeric foam material having a constant thickness between oppositely facing parallel surfaces, the central layer being compressible and electrically nonconductive; first and second electrode layers each comprising a continuous sheet of flexible nonabsorbent liquid impervious material having an electrically conductive surface; said first electrode layer being bonded to a first surface of said central layer; said first electrode layer and said central insulating layer having a plurality of discrete open apertures formed therethrough in corresponding registration with one another; said apertures having diameters less than the thickness of the central insulating layer; said second electrode layer being bonded to the remaining surface of said central insulating layer such that the conductive surface contacts the central insulating layer; the peripheral configurations of the first and second electrode layers corresponding in both size and shape to the peripheral configuration of the central insulating layer, whereby the respective electrically conductive surfaces of said first and second electrode layers are spaced apart; said pad having a contoured peripheral configuration including a wide upper section and a protruding narrow lower section centered thereon, enabling the pad to be fitted within the crotch of an undergarment by a user; said second electrode layer being a continuous noninterrupted sheet of material sealing off the apertures of said center insulating layer along said remaining surface thereof; and wherein the walls of the open apertures of the central closed cell elastomeric foam insulating layer have uniformly roughened surfaces extending between the electrode layers which assist in spreading the droplets of urine across the thickness of the insulating layer to provide an electrically conductive path between the first and second electrode layers.