Improvements in a high-speed rotary dobby

摘要

A high-speed rotary dobby in which each key mover mechanism consists of two keying levers (17,18) pivoted on the cam (3) in opposing positions about the relative key, with which they cooperate via their adjacent ends, whereas their free other ends, which are diametrically opposite about and at the same distance from the axis of the dobby drive shaft, cooperate alternately with a single control device (15) which is located on only one side of the relative main crank arm and is controlled by a logic unit, (16) said keying levers having the same arm ratio. Modifications are also described, together with a particular construction of said control device.