Abstract: An improved coil spring counterbalance assembly embodying a coil spring support structure that provides a cooperatively radiused restraining shoe against which the uninterrupted smooth external circumferential surface of the coil spring ribbon rotationally operates in extension and retraction thereof during counterbalanced sash movement, thereby eliminating both the clicking sound and spring rotational cyclic vibrational shocks otherwise caused by the spring interior ribbon core tail ending riding over the top of a spring core support hub, in addition to a multiple coil spring connection method for improved successive affixment of extended coil spring ribbons one to the other and in turn to the sash attached balance shoe connector therefor when more than on coil spring is required in order to effect proper sash counterbalancing.

Abstract: An improved vertically slidable pivotal window unit having a spring loaded jamb latch assembly which provides a mechanically positive latching and release mechanism in going from the vertically displaceable to horizontally pivotal sash opening and closing modes.

Abstract: A self-contained heavy duty constant force sliding sash counterbalance assembly embodying a stacked plurality of coil springs each having a uniform coiling and recoiling force throughout all of the various coils irrespective of the individual coil spring positions of extension or contraction, wherein the counterbalance assembly structure is provided with an elongated U-shaped housing adapted to adjustably accommodate the addition or removal of individual spring elements as necessary in order to achieve the proper counterbalance effect for the weight of the particular sash to be supported so that over the raising and lowering range of that sash to which the counterbalance assembly is affixed, and at all adjustably set sash opening elevations and corresponding coil spring positions of extension and contraction therebetween, there is a substantially constantly uniform counterbalance force effect exerted on the sash.

Abstract: A compound portal frame extrusion profile of that type employed in the manufacture of insulated portal frames for windows or sliding doors and the like, wherein the compound portal frame profile is fabricated by means of a cooperative mechanical clamp assembly structure provided integral to a set of separate lineal portal frame profile extrusion components and a fabrication method is employed based on the utilization thereof which enables the interim lineally aligned interlock connection of the separate portal frame profile extrusion components, in turn being of either two dissimilar colors or materials or a combination thereof respectively for the interiorly and exteriorly outward facing finished compound portal frame extrusion profile component members, to thus form an intercommunicating resin receiving trough for containing and supporting the progressive injection deposit therewithin of a thermally non-conductive resin-bonding material by which is formed a structural interlock connection joinably between t

Abstract: A tilt window balance shoe assembly embodying a split balance shoe structure which enables the replaceable installation and removal thereof within a window casing jamb channel thereby eliminating either the window casing production prefabrication and cost therefor of providing a specially cut window jamb notch to accommodate the after-installation removal of a worn and reinstallation of a conventional unitarily constructed replacement tilt window balance shoe, or, if no such access notch has been provided, then elimination of both the maintenance and repair cost and inconvenience of additionally removing and reinstalling the window sash counterbalance mechanism in order to otherwise accomplish conventional balance shoe removal and replacement.

Abstract: An insulated single plane window or door assembly including a casing defining a generally rectangular opening in a building wall and having first and second pairs of spaced parallel tracks with each pair being adapted to support a glazing frame with the glazing frames normally disposed for sliding movement in parallel laterally spaced vertical planes and for pivotal movement to incline the glazing frames from their respective vertical planes, with one pair of tracks being adapted to displace the glazing frame supported therein laterally into the vertical plane of and into substantially edge-to-edge relation with the other glazing frame to close the door or window assembly. The casement includes a mullion extending transversely of the rectangular opening adjacent to the juxtaposed edges of the two glazing frames when in the closed position and a resilient seal is provided between the mullion and an external surface of the respective glazing frames.

Abstract: An insulated multiple component single plane building structure portal closure embodying as components thereof a portal closure frame with glazing frame transversely disposed parallel tracks aligned the opposite sides thereof and adapted through use of glazing frame hardware in combination therewith to slidably receive therein one or more glazing frame sashes or panels in either a vertically or horizontally operable window or door assembly wherein the respective sash or panel members thereof are displaceable from a contiguous abutting single plane configuration within the portal closure frame track structure for parallelly slidable displaced movement for opening structure inward pivotal tilting, and removal therefrom or replacement thereto, wherein the entire portal closure frame and glazing frame structures incorporate complementary to the single plane secured closure configuration thereof transverse thermal barrier connectors intermediate the building structure interior and exterior exposure surfaces thereo

Abstract: An insulated multiple component single plane building structure portal closure embodying as components thereof a portal closure frame with glazing frame transversely disposed parallel tracks aligned the opposite sides thereof and adapted through use of glazing frame hardware in combination therewith to slidably receive therein one or more glazing frame sashes or panels in either a vertically or horizontally operable window or door assembly wherein the respective sash or panel members thereof are displaceable from a contiguous abutting single plane configuration within the portal closure frame track structure for parallelly slidable displaced movement for opening structure inward pivotal tilting, and removal therefrom or replacement thereto, wherein the entire portal closure frame and glazing frame structures incorporate complementary to the single plane secured closure configuration thereof transverse thermal barrier connectors intermediate the building structure interior and exterior exposure surfaces thereo