D - Textiles – Paper – 07 – B
Patent
D - Textiles, Paper
07
B
D07B 1/14 (2006.01) D07B 1/16 (2006.01) G01N 27/20 (2006.01)
Patent
CA 2169431
With this equipment, the ripeness for the discarding with synthetic fibre cables (5) for lifts can be ascertained. The principle of the recognition of ripeness for the discarding is based on the combination of two fibre types with different properties into one strand (18). The one fibre, the carrying aramide, has a high bending fatigue strength and a high specific elongation. The other fibre, a conductive carbon fibre (19) has a more brittle behaviour. Both fibre types are twisted into one strand (18). In running operation, a carbon indicator fibre (19) will in every case tear or break, by reason of too great elongations or too great a number of bending cycles, earlier than the carrying aramide fibres of a strand (18). The number of the torn carbon indicator fibres (19) can be ascertained with the aid of a voltage source. In order that a remaining carrying capacity of the cable (5) can be assured, only a certain percentage of the carbon indicator fibres (19) may fail. Then, the lift is automatically moved into a predetermined stopping place and switched off.
Ag Inventio
Riches Mckenzie & Herbert Llp
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