Static structures (e.g. – buildings) – Window or window sash – sill – mullion – or glazing – Intersection of panes having coextensive exposed sustainer
Patent
1995-09-29
1997-04-08
Friedman, Carl D.
Static structures (e.g., buildings)
Window or window sash, sill, mullion, or glazing
Intersection of panes having coextensive exposed sustainer
522046, 5220468, 52235, E06B 364
Patent
active
056176848
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a grid structure of mutually perpendicular glazing bars and to a glazing bar in or for such a grid structure. The invention has particular application to glazing bars intended to simulate a traditional timber Georgian-type window effect. An object of the invention is to provide a glazing bar arrangement which allows individual panes of glass, either single or multiple glazed, of a composite window construction to be inserted thereby achieving a true Georgian effect, and to be removed for repair or replacement. Heretofore it has been necessary to remove all the glazed sections in order to replace one section, whereas the present invention allows individual panes of a composite Georgian-type window to be repaired or replaced as required.
U.S. Pat. No. 4,845,911 shows a grid structure for supporting and separating a plurality of individual, relatively small panes of glass. Individual panes can be removed and replaced, but the structure can be disassembled from the outside since all the parts are clipped together and can be unclipped easily. That poses problems of security.
SUMMARY OF THE INVENTION
According to one aspect of this invention, there is provided a grid structure of mutually perpendicular glazing bars comprising at least one glazing bar extending between and substantially perpendicular to an aligned pair of glazing bars which abut it, each glazing bar comprising a central load bearing portion, a base portion which projects from either side, of the central portion to provide a seats for a pane of glazing material, and a formation at a location on the central portion which is spaced from the base portion, and in combination with each glazing bar, a clamping section adapted to be releasably fitted onto the formation whereby to clamp a respective pane of glazing material on each of the seats, wherein there are locating means embedded in the adjacent ends of the bars of the aligned pair and extending therebetween through said one glazing bar whereby to locate the aligned pair of glazing bars substantially relative to one another and to said one glazing bar, the formation being a snap-fit formation, the clamping section being snap-fitted onto it, and the central load bearing portion and the base portion being interlocked, wherein each glazing bar has a uniform cross-section, an outer end portion of each central load bearing portion of each glazing bar that forms the snap-fit formation and that extends outwardly beyond that part of the clamping section that is nearest to the seat when the clamping section is snap-fitted onto the formation, and the other outer end portion of each central load bearing portion that extends outwardly beyond the seat are solid, and the solid outer end portions are interconnected by a mid-portion which is hollow, the interior of the hollow portion being formed centrally of the central load bearing portion and extending along the length thereof, and the locating, means embedded in the adjacent end of the aligned pair of glazing bars are received within the interior of the hollow load bearing portions thereof and extend through a lateral aperture formed solely through the hollow mid-portion of the central load bearing portion of the intervening said one glazing bar whereby they are embedded therein.
Preferred features of the grid structure are also described in sub-claims 2 to 7.
A Georgian type window incorporating a grid structure in which this invention is embodied will have substantial strength such as to withstand considerable wind loads and other loads to which it may be subjected when installed. Also the preferred embodiment of this invention has a high standard of security being most difficult to disassemble from outside even should the clamping section be removed. That is because, even though the clamping sections can be stripped off and they are on the outside, the rest of the grid structure cannot be disassembled because the locating means are inaccessible being embedded in the glazing bars. Also the individual
REFERENCES:
patent: 3131440 (1964-05-01), Leeser
patent: 4702055 (1987-10-01), Ralph
patent: 4730429 (1988-03-01), Roberts
patent: 4845911 (1989-07-01), Winston et al.
patent: 5040347 (1991-08-01), Valvis
Friedman Carl D.
Kang Timothy B.
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