GB2088711A - Chairs - Google Patents

Abstract

A chair has a tubular metal frame with rear uprights 2 to support a back rest 6 of sheet material. The top portion 3 of each upright is pressed to form an angle member with sides 4 and 5 at about 93 degrees to receive the side edge portion of the back rest 6. The back rest is secured by screws 7. <IMAGE>

Description

SPECIFICATION Improvements in or relating to chairs This invention relates to improvements in or relating to chairs and is particularly concerned with an improved method of securing the back rest of a chair to the back support members.

With chairs which are constructed from a framework of tubular metal, connection of the back rest to the extensions of the rear legs has to be effected by means of attachments secured by brazing or other means to the tublular portions.

It is an object of this invention to provide a simplified method of securing the back rest which does not require any additional attachment or other securing means.

According to this invention a chair has a backrest secured to upward extensions of the rear legs which are of a hollow tubular material by forming the tubular material of the upper portions of the leg extensions into a general right-angular channel member into which the back rest of a sheet material may be located and attached thereto by securing means.

Preferbly the tubular members are cylindrical and the angle is formed by a pressing operation which conveniently produces an angle member of approximately 93 degrees and into which side edge portions of the back rest may be located and secured by a screw fastening means.

The arrangement avoids the need for brackets or lugs to be welded or brazed onto the tubular member, and in addition provides a visually pleasing design in so far as the line of the legs extending upwardly to the parts which support the backrest are continuous.

One embodiment according to the invention is shown by way of example in the accompanying drawings, wherein: Figure 1 illustrates the upper portion of the tubular leg member with an angle formed therein, Figure 2 shows a rear elevation of a chair with the back rest secured in position, and Figure 3 shows a front elevation of the chair of Fig. 2.

Referring to the drawings, a chair comprises generally a tubular metal framework which includes rear legs 1 which extend upwardly beyond the plane of the chair seat to form back rest supporting extensions 2. The top porton 3 of each part 2 is formed by mean of a pressing operation with a channel member having two side portions 4 and 5 which are mutually at an angle of approximately 93 degrees. Into the angle is received the side edge portions of a back rest 6 which is thereafter secured by screw means 7 engaging a suitable bore 4a provided in the part 4, The arrangement provides a particularly simple and effective means for receiving and securing the back rest 6.

1. A chair having a backrest secured to upward extensions of the rear legs which are of a hollow tubular material, by forming the tubular material of the upper portions of the leg extensions into a generally right-angular channel member into which the back rest of a sheet material may be located and attached thereto by securing means.

2. A chair according to claim 1, wherein the tubular members are cylindrical.

3. A chair according to claim 1 or 2, wherein the the angle is formed by a pressing operation.

3. A chair according to any preceding claim, wherein the angle is 93 degrees.

4. A chair incorporating a back rest and substantially as herein described with reference to the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to chairs This invention relates to improvements in or relating to chairs and is particularly concerned with an improved method of securing the back rest of a chair to the back support members. With chairs which are constructed from a framework of tubular metal, connection of the back rest to the extensions of the rear legs has to be effected by means of attachments secured by brazing or other means to the tublular portions. It is an object of this invention to provide a simplified method of securing the back rest which does not require any additional attachment or other securing means. According to this invention a chair has a backrest secured to upward extensions of the rear legs which are of a hollow tubular material by forming the tubular material of the upper portions of the leg extensions into a general right-angular channel member into which the back rest of a sheet material may be located and attached thereto by securing means. Preferbly the tubular members are cylindrical and the angle is formed by a pressing operation which conveniently produces an angle member of approximately 93 degrees and into which side edge portions of the back rest may be located and secured by a screw fastening means. The arrangement avoids the need for brackets or lugs to be welded or brazed onto the tubular member, and in addition provides a visually pleasing design in so far as the line of the legs extending upwardly to the parts which support the backrest are continuous. One embodiment according to the invention is shown by way of example in the accompanying drawings, wherein: Figure 1 illustrates the upper portion of the tubular leg member with an angle formed therein, Figure 2 shows a rear elevation of a chair with the back rest secured in position, and Figure 3 shows a front elevation of the chair of Fig. 2. Referring to the drawings, a chair comprises generally a tubular metal framework which includes rear legs 1 which extend upwardly beyond the plane of the chair seat to form back rest supporting extensions 2. The top porton 3 of each part 2 is formed by mean of a pressing operation with a channel member having two side portions 4 and 5 which are mutually at an angle of approximately 93 degrees. Into the angle is received the side edge portions of a back rest 6 which is thereafter secured by screw means 7 engaging a suitable bore 4a provided in the part 4, The arrangement provides a particularly simple and effective means for receiving and securing the back rest 6. CLAIMS

1. A chair having a backrest secured to upward extensions of the rear legs which are of a hollow tubular material, by forming the tubular material of the upper portions of the leg extensions into a generally right-angular channel member into which the back rest of a sheet material may be located and attached thereto by securing means.

2. A chair according to claim 1, wherein the tubular members are cylindrical.

3. A chair according to claim 1 or 2, wherein the the angle is formed by a pressing operation.

3. A chair according to any preceding claim, wherein the angle is 93 degrees.

4. A chair incorporating a back rest and substantially as herein described with reference to the accompanying drawings.