US2128870A - Window frame construction - Google Patents

Description

Aug. 30, 1938..

H. M. WOELFEL WINDOW FRAME CONSTRUCTION Filed April 16, 1957 ail Patented Aug. 30, 1938 PATENT OFFICE wmnow FRAME consrauo'rron Harold M. Woelfel, Montreal, Quebec, Canada, assignor to The Robert Mitchell Company, Limited, Montreal, Quebec, Canada.

Application April 16, 1937, Serial No. 137,306

2 Claims.

the occurrence of what is known as frosting orsweating of the frame. v

It is an object of this invention to provide an inexpensive and easily assembled metal sash frame comprising inner and outer sections held out of direct contact with each other by insulating material which prevents the transmission of cold from the outer to the inner side of the frame. This object is preferably achieved by the employment of inner and outer frame sections of substantially L-shape in cross section. These frame sections are fitted togetherto form an inwardly facing channel in which theglazing is cemented in place so that the cement, which is of low thermal conductivity, is interposed, as an insulating barrier, between the glazing and the side and bottom walls of the channel. In forming this glazing receiving channel the L-shaped frame sections are reversely arranged and fitted one within the other so that the bottom of the channel is formed by overlapping flanges of the sections. These overlapping flanges are held out of direct contact with each other by an'interposed layer of fibrous or other insulating material of low thermal conductivity. The flange of the inner frame section which forms part of the bottom wall of the channel is made sufficiently narrow so that its inner edge is held out of direct contact with the opposing surface of the outer 35 frame section by the glazing and glazing cement interposed between the frame sections.

It is also an object of this invention to provide an improved glazing assembly for use in connection with the improved frame construction.

40 To this end the invention contemplates the provision of a glazing assembly comprising inner and outer glass plates having their marginal portions cemented together by a hardened cementitious plastic resinous composition which serves to hold the body portions of the plates in spaced relation. After they have been cemented together by the resinous composition the edges of the glass plates are enclosed by a thin closely fitting U-shaped metal binding frame which serves to reinforce the plates against relative outward displacement. This assembly is then mounted in place within the channel formed by the previously mentioned L-shaped inner and outer members of the sash frame.

Proceeding now to a more'detailed description reference will be had to the accompanying drawing wherein- Fig. 1 is an elevation of the metal window sash and glazing assembly provided in accordance with this invention.

Fig. 2 is a transverse sectional view through the assembly shown in Fig. 1. This view also" shows the manner in which this assembly is mounted within the window frame of a railway car.

As shown in the drawing the sash frame, generally indicated at 5, comprises inner and outer sections 6 and l which are substantially L-shaped in cross section. These frame sections are fitted together so that their flanges 9 form the side walls of a U-shaped channel, the bottom of which is formed by the remaining flanges i0 which are disposed in overlapping relation and are held out of direct contact with each other by an interposed layer H of fibrous or other suitable insulating material of low thermal conductivity. The flanges Ill are secured together by screws I2 which also pass through the interposed insulating material. The two frame sections are preferably secured together in this manner so that the outer side of the flange 9 of section l lies in a common plane with the free edge of the flange H] of the companion section 6. It will also be observed that the width of flange III of section I is such that the inner edge of this flange terminates short of the inner surface of the flange 9 of section 6.

In the present instance the glazing fitted in the channel formed by the frame sections 6 and 1 comprises a pair of glass plates which are cemented together in spaced relation by means of a hardened plastic resinous cementitious composition I5 interposed between the edges thereof. This material i5 forms; with the glass plates I4, a sealed air space l6 which is useful in preventing sweating or frosting of the inside glass plate M. The edges of the glass plates M are also held together by a thin closely fitting U-shaped metal frame H. The glazing assembly comprising the glass plates 14 and the marginal .binding frame H is secured in the channel of the sash frame by means of the cement indicated at I8. The cement used in this connection is preferably of low thermal conductivity and serves to form an insulating layer between the glazing assembly and the side and bottom walls of thesash frame. The sash assembly described herein may be secured in the metal window frame of a railway car as shown. in Fig. 2. In this connection it will be noted that the sash frame is cemented to the window frame as indicated at ll with the flange 8 of the frame member 6 butted against one side of a rubber cushioning strip 20 the opposite side of which is held in place by the portion 2| of the window frame. It will thus be seen thatthe metal frame sections and I are held out of direct contact with each other by the interposed flbrousmaterial H and cement I8 which serve as insulation preventing transmission of cold from the outside to the inside of the metal frame. The only metal to metal contact between the frame sections 6 and I is that afforded by the fastening screws l2 but this does not permit sufficient transmission of cold from the outside to the inside of the frame to produce frosting or .sweating of the frame.

I the channel in which it is secured.

Having thus described my invention, what I claim is:-

1. A window construction comprising a sectional metal sash frame consisting of inner and outer L-shaped frame sections fitted together to form an inwardly facing channel, said frame sections being reversely arranged and fitted one within the other so that the bottom of the channel is formed by overlapping flanges of the sections, a layer of flbrous or other insulating material of low thermal conductivity interposed between the overlapping flanges to hold them out sembly comprising inner and outer glass plates having their marginal portions cemented together so that the body portions of the plates are disposed in spaced relation and a thin closely fitting U-shaped metal binding frame embracing the edges and the adjacent outer surfaces of the glass plates to reinforce them against relative outward displacement, the cement employed for holding the glazing assembly in said channel being disposed to form an insulating barrier of substantial thickness between the glazing and the side and bottom walls of the channel.

2. A window construction comprising a sectional metal sash frame consisting of inner and outer L-shaped frame sections fitted together to form an inwardly facing channel, said frame sections being reversely arranged and fltted one within the other so that the bottom of the channel is formed by overlapping flanges of the sections, insulating material of low thermal conductivity interposed between the overlapping flanges to hold them out of direct contact with each other and a glazing assembly cemented in place within said channel, said assembly comprising inner and outer glass plates having their marginal portions cemented together so that the body portions of the plates are disposed in spaced relation and a layer of cement interposed between the walls of the channel and the glazing assembly to secure the latter in place, said cement being disposed to form an insulating barrier of substantial thickness between the glazing and the side and bottom walls of the channel.

HAROLD M.'WOELF'EL.

Images