Abstract: A re-enterable environmentally sealed enclosure for housing circuitry and/or cable components of a communication network employs a removable cover attached to an enclosure base by a pivoting cam-tracking system. The tracking configuration positions the cover in a manner that, as it approaches the enclosure base when being closed, a seal located in the cover is evenly compressed along its entire perimeter against a corresponding mating surface on the base, thereby distributing the compressive force equally across the entire seal, with any shear forces substantially eliminated. A single tensioning system is provided adjacent the cam-tracking system, so that the tracking system does not operate as a counter-lever to the tensioning system, and visa versa, thereby improving the distribution of force across the seal.

Abstract: An intregal cable retention and sealing apparatus has reusable clamping mechanisms for the entry and exit of a wide variety of cable types and sizes to a sealed enclosure. The device is formed by "mirror-image" body halves having, when assembled, at least one axial passageway formed therethrough to accomodate one or more respective cables. One end of the apparatus includes a chamber for housing a sealing medium, whereas the other end includes a cable retention mechanism.

Abstract: The invention relates to a device and method of aligning an optical fibre (4) with respect to the lens (2) of a connector, the optical fibre (4) being positioned such that a beam issuing from the optical fibre (4) and passing through the lens (2) is directed concentrically at a four-quadrant measuring device (8). A very simple method is obtained in that the four-quadrant measuring device (8) is provided with a focussing lens (10) at a distance equal to the focal length, and in that the axial distance between the front face of the optical fibre (4) and the lens (2) of the connector is adjusted such that the sum of the light intensities measured by the four elements (9) of the four-quadrant measuring device (8) has a minimum value.