Shed forming device for looms

Claim 1

A SHED-FORMING DEVICE FOR LOOMS HAVING A PLURALITY OF HEALDS, COMPRISING IN COMBINATION: A DRIVING SHAFT, A PLURALITY OF ECCENTRICS MOUNTED IDLY ON SAID SHAFT, LINKAGE MEANS ASSOCATED WITH EACH OF SAID ECCENTRICS FOR OPERABLE CONNECTING SAME WITH A CORRESPONDING ONE OF THE HEALDS SO THAT THE EXTREME POSITIONS OF SAID ECCENTRIC CORRESPOND TO THE HIGH SHED AND LOW SHED POSITIONS, RESPECTIVELY, OF THEIR CORRESPONDING HEALDS, A PLURALITY OF COUPLING MEANS EACH COMPRISING A WEDGE AND SPRINGBIASED ROLLER BODIES, EACH OF SAID COUPLING MEANS BEING ASSOCIATED WITH ONE OF SAID ECCENTRICS AND CAPABLE OF COUPLING THE SAME TO SAID DRIVING SHAFT, A PATTERN CARD MECHANISM IN CONTROLLIN CONNECTION WITH SAID SHAFT, CONTROL MEMBERS ACTUATED BY SAID PATTERN CARD MECHANISM AND CONTROLLING SAID COUPLING MEANS SO AS TO ALTERNATELY ENGAGE AND DISENGAGE THE LATTER IN ACCORDANCE WITH THE ACTUAL PATTERN OF SAID MECHANISM, SAID LINKAGE MEANS HAVING TRANSMISSION MEMBERS FOR OPERATIVELY CONNECTING EACH OF SAID ECCENTRICS WITH ITS CORRESPONDING HEALD.