Sound insulating window

mi 3,899,861

1451 Aug. 19, 1975

United States Patent ihi

Brown

I 541 SOUND INSULATING WINIXJW | 75 | Inventor: R. G. Brown, London, England

I 73 | Assignee: The Council of the London Borough of Hounslow, London, England

I 221 Filed: Feb. 4, 1974 |2I| Appl. No.: 439,547

3,064,320 I 1/1962 Blaszkowski.......................... 52/403

3,203,053 8/1965 Lancet al............................. 52/398

3.226.903 1/1966 Lillethun............................... 52/616

3,345,791 10/1967 Shincfeld.............................. 52/616

3,526,996 8/1970 Eraleigh et al........................ 52/403

FOREIGN PATENTS OR APPLICATIONS

302,956 11/1932 Italy...................................... 52/144

I 301 Foreign Application Priority Data

Eel·. 3, 1973 United Kingdom................. 5473/73

Primary Examiner—Ernest R. Purser

Assistant Examiner—James L. Ridgill, Jr.

Attorney, Agent, or Firm—Baldwin, Wight & Brown (52] U.S. Cl...................................... 52/616; 52/208

I | Int. Cl.²......................... E04B 2/2«; E06B 1/18 | 58 | Field of Search.............. 52/202, 203, 397-400,

52/403, 616, 208, 627. 398; 49/DIG. I

156 ] References Cited

UNITED ST A TES PATENTS

2,898.643

3.012.642

3,040.389

8/1959 12/1961

6/1962

Bush et al............................. 52/400

Emmerich............................. 52/403

Fengler................................. 52/403

157 ] ABSTRACT

A sound insulating window structure having at least two coextensive frames assembled together with an insulating spacer between them, a flexible insulating gasket surrounding each frame and reposing in recesses in the frame and the window opening. Acoustic material lines inwardly facing recesses between the glazing.

Claims, 2 Drawing Figures

<img file="US3899861A_D0001.tif" />

PATENTED *UG 191975

3,899,861

<img file="US3899861A_D0002.tif" />

3,899,861

SOUND INSULATING WINDOW tion.

This invention relates to a sound insulating window.

It is known to apply double or even triple glazing to insulate a building both against heat loss and against external noise. However, such glazing is not always effective enough in noisy conditions such as by an airport and neither is it easily installed.

The object of this invention is to provide an efficient sound insulating window structure which can be simply and effectively installed.

In accordance with the invention, a window frame structure comprises at least two frames shaped in section to have several angles to inhibit the passage of sound through the material from which the frames are 15 made, said frames being secured coextensively with a sound insulating spacer therebetween, the two frames, or at least the outermost frames, being glazed and being provided with peripheral recesses in which flexible gaskets are respectively received for spacing said frames 20 from a window opening.

Preferably, each frame defines an inwardly facing cavity filled with sound insulating material.

Preferably, said gaskets are hollow and are stressed onto the respective frames to act as an air seal. 25

Each frame can be made of sheet metal and preferably includes as many acute angles as possible to help reduce the transmission of sound through the metal.

An embodiment of the invention will now be described with reference to the accompanying drawings, 30 in which:

FIG. 1 is a perspective sectional view of a window structure according to the invention, and

FIG. 2 is a section through the frames of the window structure. 35

The window structure shown in the drawings comprises two frames 1,1' made of pressed metal and having a section, as shown in FIG. 2, with several angles, each as acute as possible for inhibiting the passage of sound through the material from which each frame is 40 made. Frames 1, 1' are secured coextensively with a spacer 2 therebetween made of material, different from the frames, such as solid neoprene. The spacer 2 and frames 1, 1' are secured by rivets 3 again of different material, e.g. plastic. 45

The frames 1, 1' are mounted in a window opening, defined by wall 8, by means of hollow neoprene gaskets 4 fitted in recesses 4' in the respective frames. Gaskets 4 are preferably seated in corresponding recesses 8' in the window opening. The gaskets are of a size and con- 50 stitution such that, when located between the recesses 4', 8', they tend to recover an original form, such as circular, to exert forces to establish the seal to block air paths for sound. (Hollow gaskets can be evacuated to assist fitting and subsequently allowed to be filled with air.) Moreover, the gaskets support and locate the frames in isolation from vibrations transmitted in the wall 8. Cavities 9 between adjacent gaskets 4 and cavities 10 within the gaskets 4 also assist in sound insulaThe upper edges of each frame are folded over and are received in a glazing strip 6 which receives glazing materials 7. Glazing strip 6 is preferably made of neo5 prene.

The inwardly facing recesses defined by each frame 1,1' are filled or lined with acoustic material 5 to assist in further sound absorption.

Alternative material to neoprene should have similar 10 acoustic properties to obtain the best results.

The scope of the invention is defined by the following claims.