Abstract: A device for permitting controlled emission of a volatile substance, in particular an air-treating agent. The device comprises a container having an annular ledge with two recesses on opposite sides and a frustro hemispherical hood open at the top, that fits on to the container. The hood has two studs protruding on opposite sides of its inner wall. Inside the hood are situated two shutters that are moveable in relation to each other on relative rotation between the container and the hood by means of slots, which are moved by the studs, to close or open the opening to an infinitely variable degree.

Abstract: A dispenser for releasing a volatile active substance from a carrier material that contains the active substance in liquid form in a receptacle is impermeable to liquid, said dispenser comprising a base circular part with supporting members for said carrier and sidewall sections on which an upper circular part with cylindrical sidewall, pierced by side apertures for the emission of the volatile active substance, is pivoted. The upper circular part has on the inner disc-shaped surface thereof one or more decentrally positioned flexible blades which are able to pierce the sheath of the receptacle containing the active substance or to impale it on a spike by rotating the circular parts relative to each other in order to activate the carrier material by impregnating it with volatile active substance.

Abstract: The present invention provides a dispenser for an air treating material from which vapors are released into the ambient air through an annular aperture from a round dished base, said dispenser comprising a round dished cover made of an elastic material the top of which curves concavely inwards by exerting pressure on its center, thereby simultaneously exposing the annular aperture, and which curves convexly outwards by exerting pressure on the periphery, thereby closing the annular aperture; a spindle in the center of the inner wall of the dished cover which spindle traverses a bracket secured to two adjacent positions of the dished base; a pad of absorbent material positioned beneath the bracket containing in the interior thereof a plastic sachet which is impermeable to liquid and which contains a volatile active product in liquid form; the exertion of pressure on the center of the cover pushing the spindle downwards so that its tip penetrates the pad beneath the elastic bracket and pierces the plastic sache

Abstract: A composition which can be used as a bait for anthropophilic flies, containing a synergistic mixture of at least one alkene having 19 to 24 carbon atoms, in which the ethylenic bond is located after a carbon atom in the range between the 7-position and the 11-position, and at least one aminoacid source selected from the group comprising the biochemical class of protides.

Abstract: An evaporator system adapted for emitting insect killing vapors of an insecticide therefrom and comprising a liquid or solid composition enclosed therein, said insecticide consisting in at least one volatile phosphoric acid ester which is stabilized by at least one diazene compound.

Abstract: An insecticidal evaporator is described which comprisesI a liquid composition containingA. 40 to 90% by weight approximately calculated on the total weight of the composition of a volatile insecticidal ester of phosphoric acid the vapor pressure of which is at least 10.sup..sup.-3 Torr at 20.degree.C;b. at least one first additional organic liquid compound having a vapor pressure less than or equal to that of the volatile insecticidal ester;C. at least a second additional organic compound miscible or soluble in the mixture of the volatile insecticidal ester and of the first additional compound;Ii. a fibrous mass absorbent for the said composition I, and impregnated by the same; andIii a diffusion layer covering at least a part of the surface of the said fibrous mass, the remainder of the surface of the fibrous mass being covered by an envelope impermeable to the said composition.