Self anchoring fire resistant two piece non-operable window frame assembly

Details

Inventors: Karpen, Joseph;
Assignee: Karpen Steel Products, Inc. (Weaverville, NC)
Primary Examiner: Canfield; Robert
Assistant Examiner:
Attorney, Agent or Firm: Walker; Alfred M.

A non-operable window frame assembly comprising two frame sections, each of which slips into a rectangular hole in a wall from opposite sides of the wall; the wire glass or fire resistant glazing material is held in place by means of four pieces of square sugar molding screwed in from the top of the molding; the screws go through both sections of the window frame assembly; holding the entire assemblage in place without the need for anchor clips, making the window frame assembly self anchoring. The size of the glazing material is up to 36".times.36". The height of the square molding is a minimum of one inch, making the maximum size of the exposed glazing material 34".times.34". The entire assemblage comprising the window frame assembly and wire glass or fire resistant glazing material meets Underwriters Laboratories standards with a fire rating "C" label (45 minutes). The miters of the two from sections are continuously welded at the corners. The window frame assembly can be used for both interior and exterior walls of varying widths. For installations in an exterior wall, the glazing material can be replaced if it is broken from the inside of the building without the need for scaffolding or ladders on the exterior of the structure. The window frame assembly can be manufactured with or without a drywall return.

DETAILED DESCRIPTION OF THE DRAWINGS FIG.
1 is an exploded perspective view of the two frame sections 20, 21 of the self anchoring fire resistant two piece non-operable window frame assembly and the square molding 22.
As shown in FIG.
2, while molding 22 has three faces 37, 38, 39, molding 22 is square in cross section.
Each of the two frame sections is generally rectangular in shape, having 4 sides, being bent from sheet metal, either cold rolled sheet steel, galvanized sheet steel, or stainless steel, 16 gauge or thicker, and mitered at the corners.
The smaller of the two frame sections 20, as shown in FIG.
1, shows a portion of the four sides of the frame section.
The rabbet 1 is perpendicular to the glazing material (not shown).
The face 2 is perpendicular to the rabbet, and the face is parallel to the wall when installed in a structure.
The backbend 3 is perpendicular to the face 2, and the backbend is parallel to the rabbet 1.
Backbend 3 is bent so as to be opposite rabbet 1.
The corner is face welded across the miter and across the rabbet on the back side of the frame section.
The larger of the two frame sections 21 contains a face 4; two rabbets 5,6; a backbend 7; a stop 8; and stop faces 9,10.
Face 4, rabbet 5, and backbend 7 are bent as described above for the smaller frame section 20.
Perpendicular to the rabbet 5 and parallel to the face 4 is stop face 9.
Stop 8 is perpendicular to stop face 9 and is parallel to rabbet 5, being offset.
Stop face 10 is perpendicular to stop 8, and stop face 10 is parallel and opposite to Stop face 9.
The second rabbet 6 is perpendicular to stop face 9, and its plane is offset by the thickness of the sheet metal from the plane of rabbet 5.
The corner is faced welded across the miter and across the rabbet and stop on the back side of the frame section.
The molding has a molding top 11, and square molding faces 12, 13, which are perpendicular to the molding top 11.
Molding top 11 of FIG.
1 corresponds to molding top 37 of FIG.
2.
Molding side faces 12, 13 of FIG

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