Abstract: A corner piece for a sheet metal connector system that includes coupling members which have a V-shaped cross section and inwardly turned retaining edges spaced a given distance from the apex of the V includes a first leg which has a width slightly less than the given distance and a length, and a second leg which has a width slightly less than the given distance and a length which extends at an angle other than 180 degrees with respect to the first leg's length. The first leg may be snugly fitted between the apex of a first V-shaped coupling member and the inwardly turned edge of the first coupling member and the second leg may be snugly fitted between the apex of a second V-shaped coupling member and the inwardly turned edge of the second coupling member to join the two coupling members together at the angle. The first and second legs may be identical separate pieces which can intersect and be joined.

Abstract: A corner piece for a sheet metal connector system that includes coupling members which have a V-shaped cross section and inwardly turned retaining edges spaced a given distance from the apex of the V includes a first leg which has a width slightly less than the given distance and a length, and a second leg which has a width slightly less than the given distance and a length which extends at an angle other than 180 degrees with respect to the first leg's length. The first leg may be snugly fitted between the apex of a first V-shaped coupling member and the inwardly turned edge of the first coupling member and the second leg may be snugly fitted between the apex of a second V-shaped coupling member and the inwardly turned edge of the second coupling member to join the two coupling members together at the angle. The first and second legs may be identical separate pieces which can intersect and be joined.

Abstract: An apparatus for joining flanged, abutting duct ends or for reinforcing ducts comprises an elongated coupling member including a V-shaped portion made up of two slanting walls approaching an apex and having lower portions spaced apart a given distance. It also includes inwardly turned edges on the slanting walls spaced from the apex, extensions of the slanting walls diverging from one another as the slanting walls approach the apex extending from the slanting walls a distance about equal to the given distance, and a joining portion extending from the extensions doubling back over the apex. The extensions and the joining portions have substantial parallel segments with a curved connection between the parallel segments. The edges, slanting walls, extensions and joining portion being integrally formed of sheet metal.

Abstract: A reinforced duct includes a duct section having a peripheral skin of sheet metal, a plurality of lengths of metal straps, each strap being configured to have a cross section including a V-shape portion and inwardly turned edges spaced from the apex of the V to form a gap between the edges. The straps circumscribe the duct with the apices of the V-shapes away from the peripheral skin. A plurality of screws driven outwardly through the peripheral skin into the gaps in the circumscribing straps and engage the inwardly turned edges to bind the skin to the straps so that the straps reinforce the skin to prevent excessive flexure of the skin.

Abstract: An improved building panel. The panel includes a pair of identically formed facing sheets arranged with adjacent edges extending parallel and spaced apart to one another and an insulating core between the facing sheets to minimize the transfer of heat from one facing sheet to the other through the space therebetween. The panel further includes a channel member assembly for receiving the adjacent edges of the sheets to form a joint between the sheets. The channel member assembly includes at least one pair of opposing legs extending parallel and spaced apart to one another for interconnecting the sheets with one another and a web portion extending between interconnecting the opposing legs. The web portion includes an insulating bridge member positioned between the opposing legs adjoining the pair of facing sheets to minimize the transfer of heat from one facing sheet to the other through the web portion and defining a noncontinuous space.

Abstract: Abutting sections of sheet metal ducts are joined at an interface by flanging the ends of each section adjacent the interface and forming a plurality of spaced tabs in the wall surface of the flanges, which tabs protrude outwardly in a direction away from the interface. A generally V-shaped coupling member, having a portion of the free edges thereof folded back under the corresponding side wall, is then assembled over a pair of opposed flanges with the edges of the folded under portions snapping in behind the tabs to lock the flanges together.

Abstract: A plurality of separate V-shaped wire mesh members are arranged and connected in side-by-side relationship to provide a plurality of V-shaped cells across an air stream. A W-shaped retainer or connector formed of perforated sheet metal has outer, downstream facing trackways which receive side edges of the wire mesh members, and a central, upstream facing trackway which receives and retains the free edges of V-shaped filter media bags which are inserted into the V-shaped cells overlying the wire mesh. A stabilizer bar extends across and attaches to the exposed adjoining edges of the V-cells to support the cells in proper relation and retain the filter media in place.

Abstract: A pair of identically formed facing sheets are joined along opposite side edges and include a fiberglass core therebetween. Each of the facing sheets includes a central web section, a side wall extending inwardly from each side edge thereof, a first flange extending inwardly from the free edge of one of the side walls and a second flange extending outwardly from the free edge of the other of said side walls. Both flanges are substantially parallel to the central web section. The pair of facing sheets are positioned opposite each other and with the first flange of each sheet adjacent the second flange of the opposite sheet. A support member is inserted in the space formed by the inwardly extending flange, adjoining side wall, and opposite section of the central web.