Patent ID: 7636028

Claim:
A diagnostic fuse indication device, the device comprising: a short circuit element; a short circuit indicator electrically coupled to the short circuit element in a parallel arrangement, wherein the parallel arrangement comprises a shunt; an overload current element electrically coupled to the short circuit element in a series arrangement, and electrically coupled to the short circuit indicator in a series arrangement; an overload current indicator electrically coupled to the overload current element in a parallel arrangement, wherein the parallel arrangement comprises a shunt, the overload current indicator also electrically coupled to the short circuit element in a series arrangement; a first indicator material deposited adjacent to the short circuit indicator; and a second indicator material deposited adjacent to the overload current indicator, wherein the first indicator material reacts in response to a short circuit event to reveal the short circuit indicator, and wherein the second indicator material reacts in response to an overload current event to reveal the overload current indicator, wherein the first and second indicator materials each comprise at least one spark gap.