Abstract: An improved device for interconnecting a pair of different parts together, such as the fastening of a pitot tube to the side wall of an air flow duct of an air conditioning system. The device includes a barrel having a number of resilient legs mounted thereon near one end thereof, the barrel being externally threaded to receive a hex nut or the like. The legs, which initially project laterally from the barrel, are movable into positions extending longitudinally of and adjacent to the barrel as the barrel and legs are inserted into a hole in a second part. The legs spring back after passing through the hole and the outer ends of the legs engage the surface portion surrounding the hole when the nut is tightened on the barrel so that the first part carried by the barrel is effectively rigidly connected to the second part having the hole.

Abstract: A portable incubator having an open top jar which is closed by a lid secured to the jar by a releasable clamp. The lid has a conduit on its upper surface, the conduit communicating with a hole through the lid and provided with a pair of opposed ends. There is a valve for each end of the conduit, respectively. A holder for culture dishes can be moved into and out of the jar, the holder being formed by a number of rigid straps arranged to form a side opening in the holder so that the culture dishes can be put into the holder and supported on the bottom of the same. A hand-held, hand-actuated vacuum pump can be carried with the jar and has a flexible tube connecting it to one end of the conduit so that the interior of the jar can be evacuated in a short time. The opposite end of the conduit is adapted to permit a gas to be injected into the jar under pressure after the jar has been evacuated.