Sash construction

Nov. 20, 1951

2,575,655

E. CLERK

SASH CONSTRUCTION

Original Filed July 25, 1947

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iNYENTOR

Patented Nov. 20, 1951

2,575,655

UNITED STATES PATENT OFFICE

2,575,655

SASH CONSTRUCTION

Edouard Clerk, St. Hilaire, Quebec, Canada

Original application July 25, 1947, Serial No. 763,558. Divided and this application October

13, 1948, Serial No. 54,311.' In Canada June

14, 1947

Claims.;

This invention relates to improvements in metal windows and is a division of the subject matter set forth in my co-pending application Serial No. 763,558, filed July 25, 1947, Patent Number 2,570,523, issued October 9, 1951.

More particularly the present invention relates to an improved sectional metal window sash assembly adapted to be used in the window installation described in said application and various other types of window installations.

The object of the present invention is to provide an improved form of metal window sash in which weatherstripping elements are arranged iri a novel manner between complementary sections of the component rails of the sash so that thermal transmission from the inside to the outside of the metal sash is subsequently reduced.

Other objects, advantages and characteristics, features of the invention will be more readily understood from the following detailed description of the preferred embodiment of the invention shown in the accompanying drawings, in which—

Figure 1 is a vertical sectional view of a metal window sash embodying the invention, and . Figure 2 is a fragmentary horizontal sectional view through one of the side portions of the sash frame shown in Figure 1.

As shown more particularly in Figure 1, the bottom rail 5 of my improved window sash assembly is made in two parts comprising a main section 6 and a facing section Ί secured to the indoor side of the main section. The main bottom rail section 6 comprises a web 8 provided with upwardly projecting marginal legs 9 and 10 and downwardly projecting marginal legs 11 and 12. The legs 9 and II at the indoor side of main rail section 6 are fitted in a dove-tailed groove 13 in facing section 7. The upper edge of facing section 7 is formed with oppositely directed horizontal flanges 15 and 16. The flange 15 overlies a glazing channel 17 formed by the web 8 and upwardly projecting legs 9 and 18 of rail section 6. The remaining flange i6 of facing section 7 provides a hand grip for raising and lowering the sash. The lower portion of facing section 7 is formed with a weatherstrip receiving groove 19 opposing a similar groove 28 in a leg member 2 i extending downwardly from an intermediate portion of the web 8 of the main bottom rail section 6. The grooves 19 and 20 are adapted to receive weatherstripping elements of the type disclosed in my co-pending application Serial No. 763,558, of which the present application is a division.

(Cl. 189—76)

The downwardly directed legs 11 and 21 of rail section 6 form, with the lower portion of facing section 7, a downwardly opening pocket 23 adapted to receive therein an upwardly pro5 jeetirig leg of the sill portion of the window frame in which the sash is mounted. Heat insulating material indicated at 24 is interposed between the bottom of the groove 13 of facing section 7 and the opposing surfaces of the legs 9 and 11 of the main rail section 6 so that the only direct metal-to-metal contact between the facing section 7 and the said legs 9 and I i of main section 9 is along the relatively narrow horizontal edges of said legs.

^1:1 At. this point it may be noted that the foregoing description of the bottom rail construction of the window sash applies only to the case where the sash is used as the bottom sash, as disclosed _υ in my co-pending application Serial No. 763,558. ^ul If the sash is to be employed as the upper sash of the window installation, the bottom rail member may be constructed in the same manner as the bottom rail of the upper sash disclosed in said co-pending application.

Each side rail of my improved sash, as shown in the present drawings, comprises a facing section 2’7 which is secured to the indoor side of a main side rail section 28 by screws (not shown) or any other suitable fastening means. The main 30 side rail section 28 comprises a web 29 having an inwardly directed flange 38 at the outdoor edge thereof. Web 29 is provided with additional flanges 31 and 32 defining a weatherstrip receiving groove 33 opening towards the adjacent 35 jamb side of the window frame in which the sash is mounted and a second groove 34 opening towards the indoor side of the window. Groove 33 is adapted to receive therein a weatherstrip holder of the type described in my aforesaid co40 pending application Serial No. 763,558. The facing section 27 of each side rail of the sash is provided with a tongue 35 extending into the groove 34 of main side rail section 28. A Ushaped metal weatherstrip holder 38 is fitted on 45 tongue 35 and carries a weatherstrip 37. Weatherstrip 37 is folded over holder 38 and has its side edges turned outwardly to provide flaps 38 which are interposed between the main side rail section 28 and the associated facing section 27 50 to prevent metal-to-metal contact between said sections. Intermediate portions of weatherstrip 37 are folded around and secured to cords 39 to provide substantially cylindrical anchoring portions which are held in cylindrically curved por55 tions 40 of holder 36. The last mentioned curved portions 40 of holder 36 are accommodated in grooves 41 provided in facing sections 17 at the base of tongue 35. Ridges 43 projecting inwardly from the side walls of groove 34 engage weatherstrip 37 to give an efficient weatherstripping effect. A portion 27a of the side rail facing section 27 is opposed to the flange 30 of main side rail section 28 to provide a side rail continuation of the glazing channel formed by the flanges 9 and 10 of the bottom sash rail 5.

The side walls of groove 33, Figure 2, are also provided with inwardly projecting ridges 44 adapted to engage in guideways provided in opposite sides of the weatherstrip holder Inserted in said groove. .

The top rail of the sash frame comprises a facing section 47 and a main section 48 which are substantial duplicates of the facing and main sections of the side rails. Facing section 47 is provided with a tongue 49 extending into groove 50 of main section 48 and equipped with a weatherstrip holder 51 and. a weatherstrip. 52 corresponding to the previously mentioned holder 3’6 and weatherstrip 37. A flange 54 extends downwardly from the outdoor edge of the web 55 of the main top rail section 48 and is opposed to a portion 47a of facing section 47 to complete a glazing channel in which a glazing unit 56, preferably of the multi-pane type, is secured by a suitable caulking compound 57.

When the sash described herein is the lower sash of a window installation as shown in my copending application Serial No. 763,558, the main section 28 of the top rail is formed with a downwardly opening recess 59, the side walls of which are formed with grooves 60. The grooves 60 are adapted to receive therein weatherstrip holders carrying weatherstripping elements which, as disclosed in my co-pending application, are adapted for engagement with a weatherstripping flange extending upwardly from the lower rail of the associated upper sash.

The main rail sections of the top, bottom and side rails of the sash described herein are preferably formed separately and secured together in any suitable manner at the corner portions of the sash frame.

In the present instance, the main rail sections of the sash are shown secured together, by corner members 59 fitted in grooves 69 in which they are suitably secured to serve as rail connecting members.

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