Window sash construction

Application filed December

This invention relates to sheet metal sashes, and has for its object, a particularly simple, efficient and economical means or construction for firmly securing a reinforcing insert, 5 as a corner iron, in the hollow sash member, without the use of solder and rivets and other separable fastening means exposed on the outside of the sash.

The invention consists in the novel fea1° tyres and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawing, in which like characters designate corresponding parts ¹⁸ in all the views.

Figure 1 is a fragmentary elevation of a sash embodying this invention.

Figure 2 is a vertical, sectional view through the sash on the plane of the sash.

²⁰ Figure 3 is an enlarged isometric view of a corner portion of the sash looking into the reentrant groove of one of the stiles.

This invention is particularly applicable to window sashes and the like, which are ²⁸ made up of light sheet metal and reinforced at intervals, usually at their corners by inserts.

designates one sash member, as the stile, and 2 another, as the bottom rail, these meet³⁰ ing to form a corner.

Each member 1 and 2 is bent up of sheet metal to have opposing side walls 3, 4, and a reentrant groove 5 for receiving the margin of the glass pane 5·, the side walls 6 of the ³⁸ groove being spaced apart from the margin 7 of the opposing walls 3, 4.

designates the insert or corner iron, which is also usually formed up of sheet metal in any suitable manner, so that it is U ⁰ shaped, or provided with a pair of marginal flanges 9 for extending into the spaces on opposite sides of the walls of the groove 5, that is, between the walls 6 and margins 7.

Means are provided for interlocking the flange 9 with one of the walls with which it is interposed, and as here illustrated, it is interlocked with the wall 6 of the groove. This interlock is provided by compressing the wall 6 and margin 7 together onto the inter⁰ posed flange 9, and forming the wall 6 with

2,1930. Serial No. 801,902.

projections, and the flange 9 with complemental depressions, the formation of the projections and depressions being a punch press operation. The projections and depressions are designated 60. 55

As the interlocking means is provided between the wall of the groove and the flange, the outer faces of the sash members are left smooth and unbroken by fastening means, or ho.es for fastening means. One of the flanges 60 9 only may be thus secured in position, the other, may be omitted, or left unsecured by interlocking means. Although usually, the use of an insert at the corner is sufficient, it is obvious that the insert may be used at any 65 other point in the hollow sash members and secured in position in the same way, or by the same means. The bottom rail 2 is provided with means for securing a suitable buffer strip thereto. The bottom rail is shown 70 as formed with holes 11 for the securement of a sash holder to the sash.

Heretofore, these inserts or corner irons have been riveted in position, or soldered. The rivets, or other fastening members were 75 exposed on the outer faces of the sash, and the soldering required heating and resulted in discoloring and warping of the sash members. In my sash member, no heating or soldering is required, and the indentating 80 operation is a simple and economical one, and the fastening means provided thereby is not visible on the outside of the sash.