Patent ID: 8077554
Filing Date: 2011-12-13
Classification: G01K,G04F

Abstract:
1. A stimulus indicating device capable of providing a permanent indication of exposure to a predetermined stimulus comprising: a first compartment; a stimulus sensitive gel contained in said first compartment that is capable of at least partially contracting in response to exposure to the predetermined stimulus; indicator window positioned above said first compartment and positioned above said stimulus sensitive gel for viewing at least a portion of said first compartment; a liquid contained in said stimulus sensitive, gel that is capable of being expelled from sensitive gel, into said first compartment when said stimulus sensitive gel at least partially contracts in response to exposure to the predetermined stimulus; and a liquid absorbing material positioned in said first compartment that is capable of permanently absorbing said liquid expelled from said stimulus sensitive gel, wherein the at least partial contraction of said stimulus sensitive gel is capable of providing the indication of exposure of the stimulus indicating device to the predetermined stimulus that is visible through said indicator window, and wherein the permanent absorption of the expelled liquid by said liquid absorbing material is capable of permanently preventing said stimulus sensitive gel from reabsorbing said liquid so as to permanently prevent the reversal of the at least partial contraction of said stimulus sensitive gel, and the permanent prevention of the reversal of the at least partial contraction of the stimulus sensitive gel permanently prevents a reversal of the indication of exposure to the predetermined stimulus and thereby is capable of causing the indication of exposure of the stimulus indicating device to the predetermined stimulus to be permanent, regardless of whether the predetermined stimulus is removed.