US2024192A - Sash construction - Google Patents

Description

@am 17, 1935. Q M, VERHAGEN 2,24,192

SASH CONSTRUCTION Filed July 30, 1934 am l 17 er el?, @@Wwuzp, www

Patented Dec. 1.7, 1935 UNITED STATES SASH CONSTRUCTION Christian M. Verhagen, Chicago, Ill., assignor to The Adlake Company, Chicago, Ill., a corporation of Illinois Application July 30, 1934, Serial No. 737,600

6 Claims.

This invention has to do with metallic window sash of the type used in railway cars and buses, and is particularly concerned with the provision oi' a way of manufacturing the rail members for the sash from extruded aluminum as distinguished from ordinary sheet metal.

The principal object of the invention is to provide an extruded aluminum bottom rail which is light, neat and inexpensive and will hold its shape without bending, spreading or buckling under the weight of the sash when the latter is brought down on the sill.

Gther more specific objects and advantages will be apparent to those skilled in the art upon a full understanding of the construction of the new rail.

One form of the invention is presented herein for the purpose of exempliilcation, but it will of course be appreciated that the invention is susceptible of embodiment in other structurally modied forms coming equally within the scope of the appended claims.

in the accompanying drawing:

Fig. l is a perspective view of a portion of th bottom rail of a sash;

Fig. 2 is a transverse section through the bottoni rail;

Fig. 3 is a perspective view of a portion oi' one oi the component parts of the rail; and

Fig. 4i is a similar view of the corresponding portion of the other part.

As will be observed in the drawing, the improved bottom rail is composed of two extruded aluminum sections it and il. The outer section i9 is of generally U-shape cross section and is characterized by at parallel side Walls l2, a reentrant glazing groove i3 in the back it of the section, inwardly projecting tenon ribs l5 on the inner sides of the side walls about midway between the nat under surface i6 of the back and the lower i'ree edges l'l of the side walls, and inwardly projecting flanges i8 on the edges.

The inner section li is in the form of a nat strip and is characterized by mortise grooves I9 in its edges, of the same shape and size as the ribs l5. The sections are assembled together by sliding the inner section longitudinally into the outer section, with the ribs |5- and grooves I9 in dovetailed engagement with each other. Only the upper faces of the ribs and grooves are ared in providing the desired interlock, but both faces might of course be flared.

The upper surface of the inner section Il is ilat and forms with the under surface i6 of the back of the section I0 and with the intervening portions of the side walls I2 a tubular guideway 2l of rectangular cross section in which a locking bolt for the sash may be slidably mounted. The under surface 22 of the inner section, which may be hollowed out intermediate its side edges as at 23 for lightness, forms the bottom of a groove 2d 5 for the reception of a rubber sealing strip 25, which strip is held in the groove by the anges i8 which fit into small grooves in the side oi the sealing strip.

As it is not feasible to extrude aluminum in the tubular form desired for sesh rails, a channel or U form is the only alternative and in those cases where the sides of such a form would be too weak, as in the case of a sash rail, the present invention resides in tying the sides together'wltb 3g tenon ribs and mortise grooves. Of course a riveted strip could be used in effecting the cross connection, but this would be more costly and would-not have as neat an appearance, as the rivets would show through the sides of the rail 2o even though the heads were polished 0E ush with such sides. v

This double section rail construction, which permits both sections to be formed by extrusion, is exceedingly light, rigid and strong, and will 2g withstand, without warping or spreading, the severe strains to which the bottom rails of car and bus sash are subjected in service. The new com posite construction is not limited in its utility, however, to bottom rails alone but can be used, 3o either in the form shown or in some suitably modiiled one, in the manufacture of top and side rails as well, and can of course be made up in metals other than aluminum.-

I claim:

1. A bottom rail for sash, consisting of an extruded aluminum outer section of generally U- shape cross section having a reentrant glazing groove in the closed back thereof, and inwardly projecting tenon ribs on the inner sides of the 40 side walls between the back and the free edges oi the section, and an extruded aluminum inner section of bar-like form positioned in the outer section and provided in its side edges with mortise grooves in dove-tailed association with the ribs, said inner section abutting the side walls of the outer section above and below the ribs.

2. A bottom rail for sash, consisting of an outer section of generally U-shape cross section having a reentrant glazing groove in the closed back thereof, inwardly projecting tenen ribs on the inner sides of the side walls between the back and the free edges of the section, and inwardly projecting flanges on the free edges, and an inner section in the form of a strip positioned in the outer section and provided in its side edges with mortise grooves in dove-tailed association with the ribs, said inner section abutting the Vside walls of the outer section above and below the ribs.

3. A bottom rail for sash, consisting of an outer section of generally U-shape cross section having a reentrant glazing groove in the closed back thereof, inwardly projecting tenon ribs on the inner sides of the side walls between the back and the free edges of the section, and inwardly projecting anges on the free edges, and an inner section in the form of a strip positioned in the outer section and provided in its side edges with mortise grooves in dove-tailed association with the ribs, said inner section abutting the side walls of the outer section above and below the ribs and forming the bottom of a groove for the reception of a sealing strip engaged by the inwardly pro- Jecting anges on the edges of the side walls.

4. A bottom rail for sash, consisting of an outer section of generally U-shape cross section having a reentrant glazing groove in the closed back thereof, inwardly projecting tenon ribs on the inner sides of the side walls between the back and the free edges of the section, and inwardly projecting flanges on the free edges, and an inner section in the form of a strip positioned in the outer section and provided in its side edges with mortise grooves in dove-tailed association with the ribs, said inner section abutting the side walls of the outer section above and below the ribs and forming with the inner surface of the back of the outer section a tubular guideway of rectangular cross section for the reception of a slidably mounted locking bolt.

5. A bottom rail for sash, consisting of an outer section of generally U-shape cross section having a reentrant glazing groove in the closed back thereof, inwardly projecting tenon ribs on the inner sides of the side walls between the back and the free edges of the section, and inwardly. projecting flanges on the free edges, and an inner section in the form of a. strip positioned in the outer section and provided in its side edges with mortise grooves in dove-tailed association with the ribs, said inner section abutting the side walls of the outer section above and below the ribs and forming the bottom of a groove for the reception 1s of a sealing strip and also forming with the inner surface of the back of the outer section a tubular guideway of rectangular cross section for the reception of a slidably mounted locking bolt.

6. A two-part rail structure for sash, consisting of an outer section of generally U-shape cross section, and an inner section positioned in the outer section intermediate the back and edges of the latter, said outer and inner sections being provided with longitudinally extending ribs and grooves winch nt together in interlocking relation when the inner section is slid longitudinally into the outer section into assembled relation with the latter, and said inner section being arranged with its upper and lower surfaces disposed respectively above and below the interlocking ribs and grooves.

CHRISTIAN M. VERHAGEN.

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