Abstract: A self-supporting apparatus can be placed in a pre-set opening in an existing wall substrate. A frame assembly is configured with a perimeter that corresponds to the thickness of the wall substrate. The edge of the frame thus can be in fitting contact with the substrate opening. Flanges on opposite sides of the frame extend in the planar direction of the wall substrate to be in contact with the inner and outer surfaces of the substrate to maintain the frame in position in the wall and to strengthen the structure. The frame can include appropriate mounting portions for mounting electrical boxes or low voltage devices within the wall.

Abstract: An opening in a vapor barrier membrane interior to a ceiling can be sealed by a flexible enclosure. A planar member of the enclosure can be bonded to the inner side of the membrane. The enclosure is formed with a cavity that can encompass a ceiling mounted electrical device. A fastener is joined to the planar member permits bonding thereof with an interior surface of the membrane by manual application of a compressive force. The fastener may comprise a removable release liner covering an adhesive.

Abstract: A nuclear steam generator isolation dam (28) locking pin (36) is slidably mounted and spring (52) biased in an axial bore (42,44) of a body (40) press fit in a dam boss (32). The pin (36) is actuated by a lever (54) in a slot (54,58,62) for selective lock-in, lock-out and spring biased travel for seeking its keeper (27) in the wall (26) of the nozzle.

Abstract: A combined stripping and vacuum contact frame work station includes a work table and an easel for placing work to be viewed from said work table. In addition, a vacuum contact frame for assembling negatives and exposing a film with a composite image thereon, is movable between a position where it forms part of the easel, with the underside of the vacuum contact frame forming the easel surface, and another position where the vacuum contact frame is face up on top of the work table. A high intensity light is provided for applying intense illumination to the low sensitivity "lights-on" film which may be employed. A safe light and conventional interior lighting arrangements may also be provided, and the work table may be an optical light table to provide illumination for use in "stripping" or preparing composite images from film clips.

Abstract: Air-jet textured core/effect nylon yarn provides fabrics having better cover when the core component has been draw-oriented after conventional melt-spinning, and the effect component has been spin-oriented by melt-spinning at unusually high speed. The improved yarn is particularly useful in upholstery fabrics.