Abstract: A multiple channel duct manifold system for optical fibers which includes a plurality of elongated, corrugated tubing sections extended in parallel, contiguous relation to each other, and retained in such contiguous relation by a surrounding overwrap of thin flexible, synthetic resin film.

Abstract: A dimmer switch which includes a rotary potentiometer mounted on a board secured to, and projecting normal from, a switch arm support bracket. The support bracket is secured to a face plate. A cover housing cooperates with the face plate to enclose the bracket and board and any circuit components, including the potentiometer, which are mounted on the board. A switch arm assembly carries trunnion studs pivotally supported in receiving trunnion sleeves forming part of the support bracket, and the switch arm assembly further includes a pivot lever projecting through an aperture in the face plate, and a toggle end to which is adjustably secured an arcuate gear segment. A projecting operating shaft of the rotary potentiometer carries a gear drivingly engaged by the gear segment on the switch arm.

Abstract: An adapter fitting for connecting a corrugated flexible conduit to an electrical outlet box which includes a pair of substantially identical, semi-cylindrical cooperating fitting halves. Each fitting half carries a projecting, externally threaded neck portion, and the halves are joined by an internally threaded locking ring. A radially inwardly projecting corrugation engaging rib is provided on the inner side of each fitting half.

Abstract: An electrical outlet box optionally having in combination therewith, a connector fitting for connecting a corrugated conduit to the box, the box having a back wall and at least one side wall of synthetic resin. A pressure removable plug is displaced out of the plane of the side wall so as to provide a precisely delineated zone of weakness surrounding the plug. When one preferred type of connector fitting is used in combination with the box, a wedge-shaped end portion of the fitting, having a relatively small surface area, is manually pressed against the pressure removable plug along a pressure zone immediately radially inwardly from the zone of weakness. This pops the plug out of the wall of the box, leaving a neat, smooth hole into which the connector fitting may be inserted by continued manual pressure applied thereto.