US858515A - Fireproof window. - Google Patents

Description

CHARLES C. HURLBUT, OF WHITE PLAINS, NEW YORK.

FIREPROOF WINDOW.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed March 29,1907. Serial No. 365,412.

To all whom it may concern:

Be it known that 1, CnARLEs C. HURLBUT, a citizen of the United States, residing at White Plains, in the county of Westchester and State of New York, have invented a certain new and useful Improvement in Fireproof Windows, of which the following is a specification, reference being had therein to the accompanying drawings, forming a part thereof.

The object of the present invention is'to produce a window structure for use in fire-proof buildings in which the sash and frame are not only of incombustible material, but are also capable of resisting a severe fire without change in formor loss of strength, so that the effectiveness of the window as a bar to the passage of the fire is limited only by the character of the glass with which the window. is glazed, while the sash and frame are not injured even by a fire which quite destroys the glass, and the window, after re-glazing, is as good as before. To accomplish this result it is necessary to combine in the window structure a degree of strength and rigidity, and a degree of refractoriness to heat and the combined effects of heat and water, which are not found in combination in any available building material. The window sashes of sheet metal in hollow form which have heretofore been used have been incapable of resisting a high degree of heat, so that it is necessary to replace them after a severe fire, owing to warping which results therefrom.

In the present invention the desiredobject is accomplished by the use, in combination, of two materials of which one has the necessary strength and rigidity, while the other has the necessary refractoriness, these mate:

rials being so arranged that the refractory material protects the structural material from the heat of a fire, while I being supported by the latter and entirely relieved from necessary contribution to the strength and rigidity of the structure.

I will now describe my invention as illustrated in the accompanying drawings, and will thereafter point out my invention in claims.

Figure 1 is a front elevation of a window and window frame embodying the invention. Fig. 2 is a vertical.

section of the same on the line xx in Fig. 1. horizontal section on line 33, Fig. 2.

In the illustrated embodiment of the invention the structural portions, i: e. the portions by which the necessary strength and rigidity are secured, are of metal, preferably iron or steel, and ordinary structural forms, such as channel bars, angle irons, and plates, are used. For the refractory portions molded strips of fire resisting plastic material are employed. The invention is illustrated as embodied in a window of the ordinary doublehung type, although it will be seen that the construction is applicable (76' windows of all types or to glazed doors, skylights, etc.

Ti 10 upper sash has a lower rail of which the structural Fig. 3 isa framework consists of two angle irons seciu'ed together in such position as to provide web-portions 1 and 2 lying in the plane of the window and serving 'to engage and support the glass and to impart the necessary rigidity in the plane of the window, and web-portions 3 at right angles to the former and serving to impart the necessary transverse rigidity. A narrow plate 4 is interposed between the vertical webs of the angle irons to space them apart so as to provide a recess for the edge of the glass 5. The webs of each angle iron form a "re-entrant angle, and in these angles are seated the strips or bodies-of refractory material 6. By this arrangement the surfaces of the angle irons are covered and protected, while the refractory material is securely supported and is protected from blows or strains tending to loosen it. The inner surface of the rail is beveled at 7 to make a close joint with the upper rail 18 of the lower sash. A strip 8 of refractory material is secured to the bottom of the rail of the upper sash to complete its protection.

The construction of the upper rail of the upper sash is similar to that of the lower rail, except that no spacing plate 4 is necessary, the angle irons being secured to a metal plate 9 which needs no protecting covering as it is not exposed when the window is closed.

The cross-bars or muntins require less strength than i the outer rails, and they are constructed by securing together two narrow plates 11 with a narrower plate 12 between them so as to form recesses for the glass. Strips 13 of refractory material are secured to the outer surfaces of the plates 11.

The side rails are similarin construction to the bottom rail except that the spacers 4 are set in so as to provide exterior recesses between the angle irons to engage the guide strips 37 and 38 in the window frame. No proangle irons are secured together requires no protective covering since it is not exposed relative to the outer side of the window when the latter is closed.

The sill ofthe window frame is a composite structure comprising a channel iron 21 and a body 22 of plastic material molded therein and shaped on its upper surface to properly engage the lower sash. A shoulder on the sill engages the shoulder 16.0n the sash, and thus a close joint is made when the window is closed. A

strip of metal 24 is fixed in the sill and forms a facing for the shoulder of the sill to protect it against wear or crumbling.

The sides of the window frame each consists of two channel irons 25 and 26, of which the latter are secured to the sill by angle irons 27. The channel irons are connected by plates 28 riveted to their websso as to form inclosed spaces, which are divided by partitions 29 into two wells for the balance weights 36 of the sashes.

Jambs in the form of metal plates'31 are secured to the inner sides of the frame side members. These jambs are made in several sections and the uppermost sections cover openings 32 in the channel irons 25. By

removing the plates-access may be had to the inside of the frame members to insert or remove the sash weights Pulleys 35 are mounted on the jambs and cords or metal bands 34 passing over the pulleys connect the sashes and the weights 36 in the usual manner. The

jambs are provided with vertical guide strips 37 and 38 which engagethe recesses in the side rails of the sashes and guide-them in their movements. To increase the security of the window as a seal against fire and water the jambs are provided with'flanges 39 which engage the outside of the upper sash.

The head of the window frame consists of a channel iron 41 which is shown as riveted between the upper ends of the plates 28 and is provided with a filler: plate 42 to make a flush surface with the plates 28. A flange 43 is fixed in position to engage the outer surface of the top rail of the upper sash when the window is closed and to thus make a close joint at this point. A sash lock 45 is fixed on the lower rail of the upper sash and engages a catch 46 on the top rail of the lower sash.

scans 1. A fire-proof window comprising an inner structural metallic framework for'the support of the glass, and an outer protective covering of refractory material supported by the framework.

2. A fire-proof window comprising a metallic framework of singularly-disposed webs forming re-entrant angles, and refractory material in said angles substantially covering the framework.

3. A tire-proof Window comprising ametallic framework having webs substantially in the plane of the window for engaging and'supporting the glass, webs arranged perpendicular to the plane of the window to stiffen it laterally, andbodies of refractory gles hetweenthe webs. I

A fire-proof window comprising a framework con sisting of angle irons arranged side'by side with adjacent webs substantially in the plane of the window and sepamaterial in the exterior an rated to form a recess for the edge of the glass, and bodies of refractory material in the angles of the angle irons.

5. A fire-proof window comprising a framework con slsting of angle irons arranged side by side with adjacent webs substantially lh the plane of the window and separated to form exterior recesses in the side rails, a window frame provided with guide strips engaging said recesses, and a refractory covering for the framework.

In testimony-whereof I have aiilxed my signature in presence of two witnesses.

. CHARLES C. HURLBUT.

Witnesses:

BERNARD COWEN, Gnome F. Wsnran.

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