US2015789A - Double glazed window construction - Google Patents

Description

Oct. 1, 1935. J. H. FOX E IAL I DOUBLE GLAZED WINDOW CONSTRUCTION.

Filed Aug. 2, 1934 s Sheet s-Sheet 1- INVENTORS J H Fox J. H. ox ET AL V vDOUBLE GLAZED WINDOW CONSTRUCTION 3 Sheets-sfi 2 Filed Aug, 2, 1954 I- I m m w w. s H

Oc t; '1, 1935. FOX ET AL DOUBLE GLAZED WINDOW CONSTRUCTION Filed Aug. 2, 1954 .1 u so ee 3 Sheets-Sheet 3 INVENTORS. (/h. P5X /6. HE/oHsRT Patented Oct. 1, 1935 UNITED STATE I DOUBLE GLAZED WINDOW CONSTRUCTION John H. Fox and Herman S. Heichert, Pittsburgh,

Pa., assignors' to Pittsburgh Plate Glass Com- S PATENT OFFICE The invention relates to a double glazed window construction designed particularly for use in car windows. In such constructions, it is desirable to fill the space between the glass sheets with dry 5. air and then tightly seal off such space from the outer atmosphere in order to avoid condensation on the inner facesof. the sheets'and to prevent efilorescence (collection of white alkaline dust upon the inner faces of the sheets). Under these conditions considerable strain is placed on the sheets if the cars are sent over elevations of 8000 feet or upwards, due to the reduced air pressure on the outer sides of the sheets, and the present invention is designed to provide improved 15 means for reducing the strain upon the glass when such condition is encountered so that any danger of breakage due to this cause is avoided. A further object of the invention is the provision of a simple construction permitting the ready 20 removal and replacement of either of the glass sheets in case of breakage, or in case it should become necessary to clean the inner faces of the sheets. Certain embodiments of the invention are illustrated in the accompanying drawings,

25, wherein:

Figures 1 to 11 are sections through the lower portion of various sash constructions embodying the invention, it being understood that the construction at the sides and top of the window is 3.0; similar to that at the bottom of the window.

Referring to Fig. 1, the numerals I and 2 indicate the glass sheets, and 3 is a portion of the car construction to which the sash is removably-secured by means of the bolts 4 or other suitable 35 fastening devices.- The sash is made up of an outer wall 5 of relatively rigid construction and aninner wall I .of relatively light sheet metal, permitting it to be readily sprung outward for the purpose hereinafter set forth.. These walls 4p; may be in one piece extending on all four sides of the window or may be in four sections depending upon conditions, the one piece construction-being preferred. The wall 6 is preferably secured releasably to the wall 5 by means of thescrews I,

5 ,"a suitable-sealing material being provided at 8 in" order to make a tight joint. At the inner edges of the members 5 and'G supports are provided with grooves in which the edges of the glass sheets are seated, and in order to provide a tight joint 50 bet-ween the metal and the glass, U-shaped sealing members 9, 9 of rubber composition are provided which perform the additional function of cushioning the glass sheets. The wall 6 has welded to its upper edge for receiving the glass, 55 the strip I0, and in opposition to this strip, is a edge of the glass sheet I is similarly engaged by a 5 clamping plate l3 held in position by means of the screws l2.

It will be seen that the construction as above described provides a space l5 which is sealed off from the atmosphere and a space l6 between the 10 v glass sheets which is similarly sealed off from the outer atmosphere. If the parts are properly sealed, therefore, the dry air which is supplied to the sealed oif portions of the construction will remain in this condition, and as a result, condenl5 sation is avoided upon the inner sides of the glass sheets and also the formation of the white dust which commonly appears upon the inner surfaces of glass sheets in a double glazed construction, and is due in part to the presence of moisture in an atmosphere. When the car passes over a high elevation, resulting in reduced pressure on the outer sides of the glass sheets, the air between the sheets will expand and tend to bulge the glass, but any danger of breaking the glass under these conditions is avoided due to the support of the sheet 2 upon the relatively flexible wall 6, per- .mitting the edge of this sheet 2 to spring out slightly, thus increasing the space between the sheets. This opens communicatidn between the 0 space I 6 and the space l5, but the condition of the air between the glass sheets remains the same as far as moisture is concerned, since thespace I5 is sealed off from the outer atmosphere. In order to reduce the volume of air subject to expansion, the space I5 is preferably filled with some light material, such as a pressed com'position'of wood, pulp paper, or the like, which is shaped to fit the contoin of the space. c Q Fig. 2 illustratesamodification in which the 40 walls I! and I8 of the sash are integral and the space H is circular in crosssection. The wall I8 is, relatively thin and light to permit a spring action, so that it corresponds in function to the action of the wall 6 of the Fig'. 1 construction. In this formof device, the inner walls of the grooves in which the glass sheets are seated are integral with the sashframingand the outer walls I9 and 20 are removable, being held in clamping position by meansof the screws l2. As in the first form of construction, the space I5 is preferably provided with a filler of wood or other material which performs the function of reducing the volume of the space.

' Fig. 3 shows aconstruction in which the heavy sheets, and are held by the screws I2, I 2 as in the Fig. 1 construction.

In the modification illustrated in Fig. 4, the walls 21 and 26 are bothsomewhatflexible, and each has welded at its upper end a bar member 29, in which the edge of the glass sheet is mounted, the inner edges of the glass sheets being secured by means of the clamping plates 30, 30.

In the construction of Fig. 5, the walls 3| and 32 are both flexible and carry at their upper ends the bar members 33 and 34 grooved to receive the edges of the glass sheets, such sheets being clamped by means of the plates 36, 35. In this case, the upper edges of the wall members 3| and 32 are turned inward at right angles and fit into grooves in the members 33 and 34, being welded in such position.

In the construction of Fig. 6, the side walls 36 and 31 are welded to the base member 38 at their edges, and such base member is provided with a central rib 39 which supports thebars 40, 40 to which the upper edges of the plates 36 and 3'! are welded. The glass sheets are clamped by means of the plates 4|, 4| held in position by the screws .12.

In the Fig. '7 construction, the bars 43, 43 which support the edges of the glass sheets are welded to the upper edges of the spring member 44, and such spring member is carried in the space 46 between the walls 46 and 41, the wall'46 being bolted to the car frame member 3. In this construction, the plates 46 and 41 are clamping members. The plate 41 rests slidingly at 46 upon the flange 50 of the member 46, so that in this con-.

struction, as in those heretofore described, the member 41 is free to move to the right when pressure between the glass sheets is greater than that on their outer surfaces.

In the construction of Fig. 8, the necessary flexibility in the construction is provided by the side walls of the sheet metal box 6|, such. box being welded to the members 62 and 63 and to the flange 54 which is bolted to the car frame member 3. The glass sheets are clamped in position by means of the side plates 66.

Fig. 9 illustrates a box construction for giving the necessary flexibility, such box 61 resting upon the car frame member 3 and being provided with a pair of flanges 69, 66, which are welded to the bar members 66, 60 which carry the glass sheets. Sliding contact is provided at 6| between the outer bar member 60 and the plate 62,.which is bolted to the member 68.

The glass sheets are clamped-in position by means clamp both the side wall member 64 and theside wall member6'l. In other respects the construction is similar to that of Fig. 1.

In the construction of Fig. 11, the flexible wall member 68 is welded at its lower edge to the strip 69, and the side wall member is secured thereto by means of the screws 1|, sealing means being provided betweenv the face of the strip and the wall member III. The glass sheets are clamped by means of the plates 12. 10 What we claim is: I 1. In combination in a window construction, a metal sash comprising a pair of opposing walls with a space therebetween sealed off from the atmosphere, one of which walls is of flexible construction so that it may be sprung toward and from the other wall, a glass receiving groove being provided at the inner edge of each of said walls, and a glass sheet seated in each of said grooves with its edge sealed therein, so that the space between the sheets may communicate with the space between the walls, but is sealed off from the atmosphere. 2. In combination in a window construction, a metal sash comprising a pair of opposing walls with a space therebetween sealed off from the atmosphere, one of which walls is of flexible construction, so that it may be sprung toward atmosphere.

3. In combination in a window construction, a metal sashcomprising a pair of opposing walls with a space therebetween sealed off from the atmosphere, one of which walls is of flexible construction so that it may be sprung toward and from the other wall, a glass receiving groove being provided at the inner edge of each of said walls, a sealing member of rubber composition U-shaped in cross section seated in each groove, and a glass sheet having its edge seated in each of said sealing members, so that the space be-.

tween the sheets may communicate with the space between the walls, but is sealed off from the atmosphere.

4. In combination in a window construction, a metal sash comprising a pair of opposing walls with a space therebetween sealed oil from the atmosphere, one of which walls is of flexible construction so that it may be sprung toward and from the other wall, a'glass holding groove at the inner edge of each of said walls, said groove having one of its side walls in each case in the form of a removable clamping plate, a sealing member of rubber composition U-shaped in cross secw tion seated in each groove, a glass sheet having its edge seated in each of said sealing members, andscrew means for securing the clamping plates in position and applying pressure to the sides of the U-shaped sealing members, said space between the walls being in communication with the space between the glass sheets.

JOHN H. FOX.'

HERMAN S. HEICHERT.

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