Abstract: A damper system with a sealing plug, which incorporates an air flow monitoring system. The damper system utilizes current designs of the iris damper and incorporates a sealing plug positioned in the open circular cross-section of the iris damper. One version of the sealing plug incorporates a sealing groove in the sealing plug, while another version employs different types of sealing gaskets. The sealing groove and sealing gaskets provide a positive seal about the sealing plug when the iris blades are in the closed position. An additional feature that can be incorporated into the sealing plug is an air flow monitoring system. The sealing plug can include a chamber where total pressure of the air flow passing the sealing plug can be measured.

Abstract: The present invention is a cable preparation tool which allows the preparation of a coaxial cable having a corrugated outer conductor to receive a connector in one step. The tool allows for the control of trim dimensions for each component of the cable without measuring. No matter whether the end of the cable before preparation is at the crest or valley of the outer conductor, the tool provides the correct trim dimensions for each component and stops cutting when these dimensions are reached. The cable preparation tool includes a main body having a cable receiving end, cable receiving area for stripping of the cable such that the crests and valleys are exposed, and a crest and valley locating system as part of the main body for locating the exposed crests and valleys of the corrugated conductor. The crest and valley locating system includes at least one valley locator unit extending into the cable receiving area and a spring that biases the valley locator unit into the cable receiving area.