Apparatus for testing aramid fiber elevator cables
US6662660B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 2001 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Oct 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns an apparatus for inspecting and calculating the residual strength of an aramid fiber cable driving an elevator to determine when such cable is in need of replacement. The apparatus includes a transmitter for introducing an acoustic wave that will travel along the aramid fiber cable and a receiver for receiving the acoustic wave after its has traversed a designated section of the cable. The transmitter and receiver provide signals indicating the times the wave was sent by the transmitter and thereafter received by the receiver. From these signals, a program in the system calculates the wave velocity and the modulus, and the residual strength of the aramid cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.