Patent ID: 6923065
Filing Date: 2005-08-02
Classification: B66B,G01N

Abstract:
1. An apparatus for inspecting and calculating the residual strength of an aramid fiber suspension rope driving an elevator, the apparatus comprising: a housing, the housing comprising: (a) a transmitter for introducing an acoustic wave along the aramid fiber rope; (b) a first receiver for positioning on a side of the transmitter along the rope and for receiving the acoustic wave traveling along the aramid fiber rope and providing a first signal indicative of the time when the first receiver has received the acoustic wave; and (c) a second receiver for positioning on the side of the transmitter along the rope and for receiving the acoustic wave traveling along the aramid fiber rope and providing a second signal indicative of the time when the second receiver has received the acoustic wave; and processing means for processing the first and second signals to calculate the residual strength of the rope.