US1989305A - Noncondensing panel for glazing - Google Patents

Description

Jan. 29, 1935.

F. J. BARTUSKA ET AL NONCONDENSING PANEL FOR GLAZING Filed May 3. 1954 2 Sheets-Sheet i F. J. BARTUSKA ET AL I 1,989,305

NONCONDENSING PANEL FOR GLAZING Filed May a. 1954 2 Sheets-Sheet 2 Patented Jan. 29, 1935 PATENT] o NONCONDENSING PANEL FOR GLAZING FrankLBartuskaandEmilEBartnska,

Riverside, lll.

Application as a, 1034, Serial No. 12am 2 Claims.

Our present invention relates to the provision of a non-condensing or fog-proof panel of glass for glazing windows or display cabinets. We are aware that it has heretofore been suggested that condensation or fogging may be prevented by providing spaced layers of glass, and fllling the space between the layers of glass with a noncondensing, heat insulating fluid, such as air, from which the moisture has been eliminated. Air, being an excellent heat insulator, will prevent the transmission of the heat from the warm side of the panel to the cool side and thereby prevent the reduction of the temperature of the plate of glass upon the warm side to a temperature which would cause a precipitation of dew from the warm outside air to which the plate upon the warm side was exposed. The inclosed air in contact with the cool sheet or pane of glass will be cooled in time and considerably reduced in volume, which reduction in volume subjects both sheets or panes of glass to a pressure equal to the differential between the atmospheric pressure and the pressure of the reduced volume of gas or fluid between the two plates of glass.

Several means have been previo s Bulgested for compensating the change of pressure between the two sheets of glass by adding to or subtracting from the volume of fluid between the panes of glass.

We manage to secure a compensation of all practical differences of pressure developed in the practical use of such structures by spacing the plates of glass so that they may move closer together or farther apart as pressure changes occur, but we have found that in order to prevent too much movement'nf either plate of glass the spacer element between the plates of glass should have suilicient strength and rigidity to assist in strengthening the panel as a whole and preventing the movement of one plate of glass from being amplified by the movement of the opposite plate of glass.

As will hereafter be seen, we form the spacer of stiff rails of suitable dimensions into or upon the sides of which are let or mounted strips of cork, or other suitable resilient material which extend beyond the faces of the rails sufllciently far to permit the necessary movement of the !plates.

We have succeeded in producing non-condensing or fog-proof panels of glass which have satisfactorily met all differences of temperature which are likely to be encountered in the practical 'use of such devices by means of the structure illustrated in the accompanying drawings, in which-- Fig. 1 is a fragmental elevation of a window in which one of our non-condensing or fog-proof panels is mounted.

Fig. 2 is a fragmental section through a bottom sash rail with which one of our non-condensing panels is assembled.

Fig. 3 is a fragmental view of a display case in which one of our non-condensing panels is mounted at an angle with the vertical.

Fig. 4 is a sectional detail, to an enlarged scale, of the panel andsash assembly employed in the structure shown in Fig. 8.

Fig. 5 is a detail of a comer of a panel mounting showing a way of Joining the ends of the spacer rails. 1

Fig. 6 is a fragmental detail showing the mounting of one of our non-condensing panels in an ordinary sash with putty, and

Fig. 7 is a fragmental detail, to an enlarg scale, of a panel and sash assembly with putty.

Similar reference characters refer to similar parts throughout the respective views.

We prefer to construct the panels by flrst pro-.

viding a frame of spacer rails 10, most clearly shown in Figs. 1, 4 and 5. The rails are preferslightly with the extent of the panel but in hardly.

any case need be more than three-quarters of an 'inch. Into the opposite faces of the rails is preferably cut a rabbet or groove 11. The joining ends of the rails 10 are preferably rigidly secured together by inserting a feather piece 12 or by the use of other construction employed for a similar purpose. In the rabbets 11- are mounted, preferably, strips of cork 13 which extend sufficiently far beyond the vertical faces of the rails 10 to permit the necessary movement of the plates of glass 14. Other material may be employed than wood for forming the rails 10 andany material of the desired flexibility may be employed in place of the strips of cork 13; Strips of rubber would have probably more flexibility than cork,

but the flexibility of rubber varies greatly in accordance with the changes of temperature to which it is submitted and the liability of rubber to oxidize or otherwise change its composition would also greatly effect its flexibility, so that cork, so far as we at present know, has sumcient restorative properties for the purposes contemplated, and is less liable to alter with either temperature or the passage of time and will therefore ing a leakageof the anhydrous gas and with much less liability to breakage than the panes of glass employed would have independent of the assembly.

We have not illustrated any special facilities for introducing anhydrous gas or air between the plates 14 as there are so many ways in which this can be satisfactorily accomplished. It has been found that panels constructed as herein described do not fog even on excessively humid days when most objects are .liable to some condensation.

The outer frame or sash serves to mount the panel where it is desired. Such frames or sash mounting of the panel may take almost any of the forms employed for sash and window frame construction.

We have shown 7 in Fig. 2 a semi-metallic mounting in which molded rails 15 and 16 are faced on the top and forward edges with rolled metal plates 17, 18 and 19, and a molded metal stop 20 is drawn in to engage the panel by screws 21. The panel heretofore described may also be mounted in display cases where the stops 22 are 'secured in position by suitable instrumentalities, as shown in Figs. 3 and 4, or our panels may be also mounted in frames or sash with putty or moulding 23 alone, as most clearly shown in Figs. 6 and 7.

The flexibility provided by the layers of cork 13 has been found suflicient to take up all contraction and expansion occasioned by changes of temperature without putting a destructive pressure upon the putty. In large panels where there is a. great surface exposed to temperature change one would pu aos naturally expect the development of a consider- 'able aggregate pressure and considerable movement of the parts with relation to each other. However, the gas included between the plates of glass is always being heated from one side as it is being cooled from the other, and by distributing the area where movement takes place entirely around the periphery of the glass and between the pair of strips 13 movement in any particular place is.reduced to such an extent as to be completely and satisfactorily taken care of by the resiliency of thecork.

Having described our invention what we claim as new and desire to secure by Letters Patent is:

1. A non-condensing glazing panel comprising a spacer frame composed of rails of relatively noncompressible material secured rigidly together at their junctures, strips of cork carriedby, let into, and extending from the lateral faces of said rails, plates of glass sealed to said respective strips of cork, and an anhydrous fluid provided between said plates of glass.

2. A non-condensing glazing panel comprising a spacer frame composed of rails of relatively noncompressible material secured rigidly together at their junctures, strips of flexible elastic .material carried by and extending from the lateral faces of said rails, plates of glass sealed to said respective strips of elastic material, and an anhydrous fluid provided between said plates of glass.

FRANK J. BAR'I'USKA. EMIL E. BARTUSKA.

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