Control device for double swinging lever of a dobby

DETAILED DESCRIPTION It is a principal object of the present invention to overcome the drawbacks set forth hereinabove, by proposing a double lift dobby for weaving machines, of the type in which the coupling members articulated at the two ends of each double swinging lever are intended to cooperate, under the control of a selection system comprising a programmed actuation mechanism associated with reading and transmission elements, with mobile traction members carried by plates moved by an oscillating motion, characterized in that the reading and transmission elements are carried by the oscillating plates so as to cooperate in turn with a retractable stop of the actuation mechanism provided to be fixed.
According to the invention, the reading and transmission elements which, in combination with the programmed actuation mechanism control the coupling of the traction members with the coupling members of each double swinging lever, are carried by the oscillating plates.
It will be understood that such an arrangement considerably simplifies the construction of the selection system since the latter selection system does not ensure control of the double swinging lever in question; in fact, it is the oscillating plates forming supports for all the reading and transmission elements of the dobby which furnish this control at the same time as the traction effort.
Under these conditions, the programmed actuation mechanism of the selection system may include a simple wheel with pegs, or by a single assembly of electro-magnets associated with pushers with reciprocating axial displacement.