US2670821A - Metal weather stripping - Google Patents

Description

March 2, 1954 R. GOLDBERG METAL WEATHER STRIPPING Filed March 14, 1952 Patented Mar. 2, 1954 OFFICE.

METAL WEATHER STRIPPING Ralph'Goldber g, Denver, 0010.

Application March 14, 1952, Serial No. 276,482

' 2 Claims. (Cl. 189-65) This invention relates to improvements in metal Weatherstripping of the type employed in connection with casement type windows.

Casement windows of the type to which this invention relates have window frames and sash formed from metal bars, usually of Z-shaped cross section. If the bars are made from steel they are usually rolled; aluminum bars are now commonly extruded through dies and are quite uniform in size.

It is the object of this invention to produce a metal weatherstrip of such design that it can be readily installed, without the use of special tools and which will'remain in position withou the use of special fastening 'meansi The principal object is to produce a weatherstrip of such design and construction that it will interpose only a single thickness of metal between the sash and the window frame when the window is in closed position.

The above and any other object or objects that may become apparent as the description proceeds are attained by means of a construction that will now be described in detail for which purpose reference will be had to the accompanying draw- .in Figure 1, and shows the window frame and weatherstrip as they are before the window is closed, the sash frame being shown by broken lines;

Figure 3 is a perspective view looking into a corner of the window frame and shows the weatherstirp in position thereon;

Figure 4 is a cross sectional view to an enlarged scale, of the weatherstrip shown in Figures 1,2, 3 and 5; and

Figure 5 is a fragmentary view, partly in section and partly in elevation showing the sash in partly open position.

Referring now to the drawing, the Z bar that has been designated by letter F represents the window frame and the one designated by S represents the window sash. The window to which refernce will be made throughout is of the usual casement window type, comprising a rectangular frame formed from four bars F and a window sash hinged thereto as shown in Figure 5. The bars forming the frame are the usual Z bars that have window stops l0 and flanges 2 H joined by a web. I2. The bars from which the sash is made have been shown as identical with bars F.

In Figure 5 the manner in which the sash is hinged to the frame is shown and from it it can be seen how the corner l3 moves along the arc of a circle whose center is the pivot l4, until it comes into the position shown by the broken lines.

Unless some form of weatherstrip is provided there will be considerable air leakage between the frame and the sash when the latter is in the closed position shown in Figure l.

To prevent air leakage between the sash and the frame when they occupy what is usually referred to as closed position-various forms of weatherstrips or seals have been invented; one of the most popular being that shown in U. S. Patent 2,002,569 of which the present invention is an improvement.

The 2 bars of which the frame and sash are made are carefully formed and if they are made from aluminum they are frequently extruded through dies and are of uniform size at all points and have smooth surfaces. In order to get the most satisfactory seal the weatherstrip must be so formed as to prevent the overlapping flanges on the outside from being spaced such a distance that the gap permits an excessively free movement of air.

Referring now more particularly to Figure 1 and Figures 2, 3 and 4 it will be seen that the weatherstrip is formed from a thin strip of spring brass or the like (the thickness commonly used is .003 of an inch). The metal weatherstrip is folded as shown in Figure 5 which is to a scale about four times actual size. The folded strip has a side l5 that is joined to side l6 by a short end wall 11. Side is is folded reversely forming part l8 that terminates in the reversely curved end 19 which normally extends beyond side IS a distance X.

The strip is positioned on flange ill as shown in Figures 1, 2, and 3. When the window sash is moved to window closing position it pushes part l9 inwardly, as shown in Figure 1, and this forms a tight seal. It will be observed from Figures 1 and 3 that side I5 is a single thickness of metal and since it is thin, as above pointed out, there will not be any appreciable space between outer fianges II and Ila.

In Figures 2 and 4 side l5 has been shown as folded back forming a double thickness at 21!. From Figure 5 it will be seen that fold 20 is so, narrow and so positioned that it is not contacted by side I (la when the window is closed.

Attention is directed in particular to the fact that with this shape of Weatherstrip only one single thickness of material separates the inner flanges of frame members F and S when the window is closed.

Weatherstrips formed as shown in the drawing may be used on all four sides of the window frame because, even along the side where the window is hinged, the Weatherstrip does not interfere with the operation of the window.

Having described the invention what is claimed as new is: i

1. A weather strip for use with casement windows of the type having a window frame including a bar provided with an inwardly extending flange and a sash movable to opened and closed positions; said weather strip comprising a resilient strip folded to provide a channeled portion U-shaped in transverse cross section and constituting a pocket having walls connected along one edge by a bridge portion saidpocket being of dimensions adapting it to snugly straddie the inwardly extending flange of said bar, said strip being folded back upon itself against a wall of said pocket and projecting laterally beyond the bridged edge of the pocket and in outwardly spaced relation to the said bridged edge being bent back in spaced relation to the extended portion of the strip in the direction of the pocket and forming a sealing flange arcuate in cross section and having a free side edge terminating short of the bridge edge of the pocket and deflectible to a depressed sealing position without contacting the pocket by engagement with a confronting surface of a closed sash.

2. A weather strip for use with casement windows of the type having a frame including a bar provided with a laterally extending flange and a sash movable to opened and closed positions; said weather strip comprising an elongated strip, a flange-receiving pocket extending longitudinally of said strip and being U-shaped in transverse cross section and open along one side edge for straddling engagement with the flange of the frame, said pocket having inner and outer walls connected along the other side edge of the pocket by a bridge portion, the inner wall of said pocket being disposed in face to face relation to the strip and along the open side edge of the pocket being united with the strip, and said strip being flat and projecting laterally beyond the closed side edge of the pocket and carrying an overhanging resilient sealing flange arcuate in transverse cross section and extending in the direction of the pocket and having a free side edge terminating shortof the pocket in position for sealing engagement with the closed sash, the free side edge of the sealing flange being folded back upon itself and thereby providing a smooth reinforced side edge for engagement with the confronting surface of the closed sash.

RALPH GOLDBERG.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,879,340 Lamping Sept. 27, 1932 1,904,491 Manhan Apr. 18, 1933. 1,991,357 Barringer ,...'.Feb. 19, 1935

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