| 摘要 |
Device for operating a blind, consisting of a pulley block 2 for reducing the length of the manoeuvre 1, the movable pulley sheave 3 of which is itself controlled by a cord or cable 4 under the control of a cursor or slide 5 whose displacement determines a homothetic displacement of the crosspiece of the blind A, the weight of the latter and the aggravating effect of the inverse pulley block being equilibrated, if necessary, by an elastic compensator 11 acting on the operating device of the manoeuvring cursor or slide. <IMAGE>
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