The present invention presents a unique class of physiological suppressors of cell division and cleavage. The Jacquard machine is provided to maintain one or several pile warp yarns in successive operating cycles of the weaving machine in an upper andor a lower position. The accessory body maintains an opening for receiving the pin and is formed with an insert groove within the opening into which the pin is inserted, which is elastically locked with the locking groove of the pin by a spring. The second optical sensor has a second field of view of the second scene and produces second electrical signals in response to light from the light source in the second field of view.