US2677861A - Weather stripping for windows having vertically slidable sashes - Google Patents

Description

May 11. 1954 w. FRIEDMAN 2,677,861 WEATHER STRIPPING FOR wmnows HAVING VERTICALLY SLIDABLE SASHES Filed June 30, 1952 2 Sheets-Sheet l INVENTOR.

Mum; Fjf/EDM M/ AT TOE/VS V May 11. 1954 w FRIEDMA N 2,677,861 WEATHER STRIPPING FOR WINDOWS HAVING VERTICALLY SLIDABLE SASHES 2 Sheets Sheet 2 Filed June 30, 1952 INVENTOR. WILLIAM fk/EDMM 9 BY Patented May 11, 1954 UNITED STAT ATET OFFICE WEATHER STRIPPIN G FOR WINDOWS HAV- ING VERTICALLY SLIDABLE SASHES William Friedman, Denver, "0010., assignor of onefourth to Leo Cohen, and of Denver, Colo.

H. Weiss, one-fourth to Dave one-fourth to David Lifshutz, all

This invention relates to improvements in windows and has reference more particularly to improvements in weather stripping for windows having vertically slidable sashes.

Windows of the type having upper and lower window sashes that are counterweighted by sash weights and ropes or chains, have been extensively employed in all forms of buildings but more particularly in residences and oiiice buildings.

the breakage of the ropes or other tension members that connect the sashes with the sash weight. Windows of this construction are also difiicult to Weatherstrip and as a result they are seldom weatherstripped and therefore cause much heat losses in winter.

Attempts have been made to produce satisfactory windows that do not require sash weights and various designs for this purpose are known.

It is the object of this invention to produce a double sash, vertically adjustable window which will not require sash weights and which shall be provided with improved Weatherstrip means built into the jambs and which produce windows that are easily operated and which limit the passage of air between the jambs and sash to a negligible amount.

The above and other objects that will appear as the description proceeds are attained by means of a construction and an arrangement of parts that will now be described in detail for which purpose reference will be had to the accompanying drawings in which the invention has been illustrated and in which Figure 1 is a partial front elevational view of a window constructed in accordance with this invention part being broken away to better disclose the same;

Figure 2 is a section taken on line 2-2, Fig-- ure 1;

Figure 3 is a. section taken on line 33, Figure 1;

Figure 4 is a perspective view, partly in section, showing a portion of the window jamb with the metal weatherstrips in place;

Figure 4A is a diagrammatic detail to an enlarged scale;

Figure 5 is a view similar to that shown in Figure 4 and shows a jamb having a metal covering with built in weatherstrips;

Figure 5A is a diagrammatical detail to an enlarged scale;

Figure 6 is a diagrammatic view showing how iii) the lower sash can be raised and also tilted inwardly to efiect ventilation and Figure 7 is a diagram showing how the lower sash can be removed from the window frame for cleaning and repair.

Referring now to the drawin numeral I0 designates the window trim and H the jambs while the lower and the upper sashes are designated respectively by LS and US. The side rails or stiles have been designated by I2. The two jambs in the window frame differ from the ordinary J'ambs construction and have been shown to an enlarged scale in Figures 4A and 5A. Referring first to Figure 4 which shows an all wood construction it will be seen that the jamb is provided with a long shallow groove l3 that forms a guide for the lower sash in a manner that will be hereinafter explained. The jamb surface is also provided with a wide groove M from whose bottom two spaced ribs l5 may project. A T- shaped strip i6 is positioned along the middle line of groove it. Where ribs l5 are used, between the ribs as shown in Figure 4, long channel shaped metal weatherstrips I"! are positioned in the spaces between the outer or side walls of groove 14 and the ends of the cross bar of the T-strip which is held in place by screws [8. One side or flange of each channel strip H has its edge bent outwardly providing a narrow strip l8 that fits underneath the outer end of the cross member of the T-strip.

A hard wood strip 26 is positioned in each channel to increase its rigidity. Springs 2| are Positioned at spaced intervals along the length of the weatherstrips and urge them outwardly; when there is no force tending to move the strips inwardly they occupy the position shown, in which the laterally projecting edge is in engagement with the under surface of the top bar of the T-strip. In the drawing springs 2! have been shown as coil springs but in the actual construction they are formed from short sections of spring steel ribbon bowed into a semi-elliptical shape. It is to be understood that any suitable springs may be substituted for those shown.

In Figure 5 the lamb is provided with a wide groove Ma, along one edge of which is a rabbet [3a. The entire inner surface of the lamb is covered with a metal sheet 22 which may be formed from aluminum or copper and which is bent into the cross sectional shape shown in Figures 5 and 5a, the latter being a diagrammatic showing added for convenience in describing the shape. The sheet metal plate 22 is formed by special machines into the shape shown and when finished has a return bend 23 that terminates in a downwardly extending wall 24 which in turn terminates in the bottom 25 whose other edge is joined to the upwardly extending wall 26 that is formed into the T-bar Mia, and passes thence downwardly as shown at 21 where it joins bottom 28 which in turn joins with the upwardly extending wall 29 that terminates in the reversely bent flange 3B and is further formed into groove 13a. It will be observed that when the metal sheet is completed it forms two grooves similar to those shown in Figure 4 and differs merely in this that it has the reversely bent edges 23 and 30 which are absent in Figure 4.

The finished jambs form the sides of the win dow frame shown in Figure 1.

Figure 2 shows the vertical stile of the lower sash in its position relative to the jamb. The vertical stiles of both sashes are provided with a friction device comprising two rollers R that are carried by the U-shaped channel 3| that is slidable in the larger channel 32 and is pressed outwardly by a spring. This device forms the subject of copending application Serial Number 296,413 filed by William Friedman on June 30, 195 which is assigned to the assignees of this application and it will therefore not be described in detail in this application. The lower sash is provided near its bottom with pins 33 that project into groove [3. When the lower sash is in closed position pins 33 and rollers R on both sides are in grooves l3 and guide the sash in its vertical movement. Rollers R are so mounted that the window sash may move freely in an upward direction but they oppose a considerable resistance to forces tending to move the sash downwardly. Means such as screw 34, Figure 3, is provided for moving the rollers inwardly to a point where they no longer project into grooves l3 and the lower sash can then be tilted as shown in Figure 6.

If the sash is to be entirely removed it is tilted about pins 33 until its plane is substantially perpendicular to the window frame whereupon it is tilted to the position shown in Figure 7 and removed. It may be replaced by a reverse procedure.

When the lower sash is in place a portion of the outside surface of the vertical stiles are in engagement with the bottom of one of the corresponding channel shaped weatherstrips and a very tight seal is thus formed.

Figure 3 is a section taken through the upper sash at the place indicated in Figure 1. The jamb has no groove corresponding to l3 for the upper sash, which is guided by a stop 35 and by one of the weatherstrips. Rollers R serve, as explained in connection with the 10Wer sash, to hold it in vertically adjusted position.

Applicant calls attention to the small block B shown in Figure 4. This block is positioned between the top frame member of the lower sash and the bottom frame member of the upper sash to block this opening through which air would otherwise circulate.

Attention is directed to Figures 5 and 5A in connection with which it is explained that although the metal covering 22 is shown as covering the entire inner surface of the jamb this is not essential. In most cases only that portion between points 23 and 30 is employed and the resulting assembly is sold to factories or to contractors who position this weather seal assembly in a suitable groove in the jamb.

In the drawing, parts comprising the portions numbered from 23 to 30 have been shown as formed from sheet metal. It is applicants intention to employ an extruded aluminum part for this purpose in which case parts 26 and 21 become one part as in Figur 4.

What is claimed as new is:

A window of the type having vertically slidable upper and lower sashes having spaced stiles positioned in a window frame having spaced jambs, the stiles and jambs being in opposed slidable relation, the inner surfaces of the jambs having two spaced. parallel grooves extending the entire length thereof, elongated weatherstrips positioned in the grooves and mounted for transverse movement therein. means limiting the outward movement of the Weatherstrips to a point in which they have portions positioned in the grooves at all times, springs positioned between the bottoms of the grooves and the weatherstrips urging them outwardly, window sashes positioned in the frame with the Outer surfaces of their vertical stiles in engagement with corresponding weatherstrips, the jambs having each a groove on the inside of the inner Weatherstrip, pins projecting outwardly from the lower ends of the vertical sash stiles into the last named grooves in the jamb-s forming guide means, additional guide means carried by the sash at points above the pins for operative engagement with the last named grooves, the pins and the upper guide means guiding the vertical movement of the sash, and means accessible from the inside for retracting the upper guide means from engagement in the grooves to permit the upper end of the sash to be moved inwardly to provide a ventilating opening,

References Cited in the file of this patent UNITED STATES PATENTS

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