Abstract: A spiral stairway construction, designed for ease of assembly, is adapted for use by hobbists on a reduced scale, for display in model homes and elsewhere and for a spiral stairway installation in residences and the like. This stairway comprises a semicircular wall, a central vertical post support assembly and a plurality of treads or steps each diverging from its mounting or proximal end to its distal end as is usual in spiral stairway treads. Each proximal end has a mounting hole for removable attachment to the post support assembly in a vertically spaced relationshiped provided by spacing alignment on such support and each distal end is removably engaged with a designated point on the wall to dispose the treads in a helical path. The assembled construction is free standing and does not require anchoring the wall or post support assembly to any supporting surface.

Abstract: A hinge unit is provided for doors and casement windows by an arrangement of four like pins each having a shank extending from an enlarged head. A first pin with a threaded bore through the head has the shank threadably secured to the door or window so that the bore therein is horizontal. A second pin with a like threaded bore through the head has its shank threadably secured to the first pin with the bore in the second pin vertically disposed. A third pin with an oversized smooth bore through the head has its shank threadably secured to the wall adjacent the door or window with the bore vertical. The head of the third pin is disposed above the head of the second pin so that the respective bores are in registration. The fourth pin has its shank journalled through the oversized bore of the third pin and threadably engaged in the head of the second pin. In an alternative arrangement, as a matter of choice, the second pin may be secured to the wall and the third pin secured to the first pin.