Patent ID: 7973671

Claim:
A breakage indicator for a shear component, the indicator comprising: a head connected to a foot via a stem, the stem being adapted to be broken into a head portion and a foot portion at an axial location as a result of breakage of the shear component; an urging member adapted to displace the head towards an indication position upon breakage of the stem; the foot being adapted to retain the head relative to the shear component via the stem; whereby breakage of the stem frees the head to be displaced into the indication position by the urging member; a sleeve around at least the axial location of the stem, the sleeve being adapted to break with the stem in the event of the breakage of the shear component; an annular wall defining a chamber in the form of an enlarged axial bore, the annular wall having a first end secured to the first end of the sleeve and a second end extending from the first end towards the head; whereby the urging member is in the chamber; and a casing defining an enclosure is secured to the second end of the annular wall, the casing having a transmitter for emitting a signal and a contact member associated with the transmitter, the contact member being disposed within the enclosure and in the axis of displacement of the head and being adapted to be activated by the head when the head is displaced by the urging member; whereby the transmitter provides a wireless indication of the breakage subsequently to the activation of the contact member.