Abstract: The shed forming device according to the invention for a weaving loom of Jacquard type comprises two series of knives actuated by a single input shaft animated by a continuous movement of rotation and extending between two plates which support oscillating shafts equipped with rocking levers kinematically connected to the series of knives. The input shaft is equipped, in the vicinity of each plate, with means for driving the rocking levers. The oscillating shafts extend in parallel between the plates and are each connected to the input shaft by a single rod and eccentric link, a link being respectively made in the vicinity of each plate.

Abstract: The brake uses a slow brake feature whereby a positioning member, such as a lever, is actuated directly via a first spring to cause braking in response to faults only on the weaving side as well as a fast or normal brake feature whereby the positioning member is able to transmit the braking force of a second spring to effect braking in response to faults on the weaving side or mechanical side. The second spring acts on the positioning member via an abutment which is moved against the positioning member upon release of the second spring. The second spring can be released via an electromagnet in response to a weaving fault on the weaving side or by a stop-motion rod in response to a mechanical fault.