Abstract: A nebulizer for introducing a liquid in fine droplet form into a gas flow, including a reservoir for the liquid, a side wall, a base wall of generally conical shape, the base wall extending from a lower outer periphery adjacent said side wall to a central raised part, the base wall being covered by a flange plate whereby there is provided a capillary path from the lower outer periphery to a centrally mounted jet.

Abstract: A mask assembly for allowing application of gases to the nose and mouth of a person, the mask assembly including a gas delivery nozzle, a mask adapted to cover the nose and mouth of the person, and a retaining strap, the gas nozzle having one end connected to the mask and a free end adapted for connection to a connector assembly, the retaining strap including a clip member and a strap, the strap being adapted to extend around the back of the head of the person and having one end connected to one side of the mask and a free end, the clip member including first and second parts, one of the parts being attached to the free end of the strap and the other one of the parts being attached to the other side of the mask, a specified one of the first and second parts having first and second longitudinally spaced opposite ends, being attached to the mask or strap, respectively, at the first end and adapted for connecting the other of the parts thereto at different selected positions along its length, so that the effecti