Patent ID: 9188500
Filing Date: 2015-11-17
Classification: G01L,H01F

Abstract:
1. A fault indicator for indicating the occurrence of a rapid pressure surge within a housing of an electrical device, the fault indicator comprising: (a) a barrel capable of being mounted in an aperture in the housing; (b) an actuating mechanism comprising: (c) a plunger within a bore of the barrel, the plunger biased outwardly in the barrel and normally retained in an armed position by the actuating member; and (d) a radial seal disposed between the plunger and the barrel so as to permit relative motion of the plunger and the barrel; wherein, when the pressure differential exceeds a positive threshold value, the actuating member is moved and thereby permits the plunger to move outwardly into a triggered position, and wherein the radial seal is sealingly engaged with both the plunger and the barrel in both the armed position and the triggered position.