US1791453A - Chair - Google Patents

Description

eh 3, 1931. L. MlES 1,791,453

CHAIR Filed Aug. 4, 1928 Patented Feb. 3, 1931 PATENT OFFICE LU'DWIG urns, or BERLIN, enammz GHAIR Application filed August 4, 1928, Serial No.

The usual construction of chairs with four legs renders the seats comparatively rigid which entails an inconvenient carriage of the upper portion of the body of a person using these chairs. It has, in view of this, already been endeavoured to provide for a more comfortable seat by connecting the seat-carrying lateral ledges of the chair structure with chair-supporting bottom ledges by tubular members sobent as to represent one and a half threads of a cylindrical screw, and being made integral with said seat-carrying ledges and said chair-supporting ledges, as well as with a back. The elastic yieldingness of chair frames of this kind is, however, too great, and besides, the manufacture of such chairs is expensive, as it is not possible to bend the tubular members in I cold state in order to form the one and a half screw threads mentioned. It is indispensably necessary to heat said members prior to the bending, to make use of particularly designed bending devices, and to harden the said members after the bending. Owing to the feature that on a part of the circumference of the cylindrical spring two threads contact closely with one another, it is easily possible that a hand, or a finger or fingers of a hand, should get clamped in between said threads and be squeezed and hurt between them and also tearing of the apparel can occur. It is from these reasons not advisable to place chairs of that kind into childrens rooms. Now, in contradistinction to the elastically yielding chairs with their one'and a half threads, as just dealt with, the present invention relates to chairs in which the foot, the seat supports and the back are formed preferably of bent tubes, the lower halves of so which, or, more precisely, the portions between the foot proper and the seat supporting ledges are bent about semicircularly. Practical use of chairs of this improved design has proved the fact that the so supported 4 seat is resistible enough, but it is also sufliciently elastically supported to be very comfortable. The semi-circular seat-supporting parts of the lower half of the chair can be bent in cold state of the tubes merel with the aid of a templet so that the manu acture 297,437, and in Germany August 23, 1927.

is by far simpler than it formerly was. There is now no portion in the chair structure or frame where a hand, or fingers, could be damaged, in that there are no contacting screilw-threads, as in the former design dealt wit Y It is, by the way, easily possible to provide a chair of the improved design with armrests also forming parts of a suitably bent and curved tube, all as more fully described hereinafter.

The invention is illustrated diagrammatically and by way of example on the accompanying drawing, on which Figure 1 is a perspective View of a chair designed according to this invention and Figure 2 is a similar view showing the chair provided with armrests.

On the drawing, a f a Fig. 1 denotes the U-shap'ed base or foot of the chair which consists of the sill portions (1. a and their transverse connection 7. From the portions 0 a extend upwardly the semi-circularly bent feet-forming front portions 6 Z), theupper ends of which extend horizontally rearwardly and form the side railsc 0 of the seat proper from which extend further rearwardly and then upwardly the U-shaped back comprising the uprights and cross-piece e d e, as shown. The uprights e 6 support the back proper h, and the horizontal portions 0 0 support the seat proper g.

The foot portions a a need not indispensably be connected with one another by the transverse portion 7, but as the rigidity of the entire structure is increased by the portion f the provision thereof is to'be preferred.

The chair structure (a .7) c e d e c b a f) is formed preferably of steel-tubes, but it is, indeed, possible to make it also of suitably strong and resistible kind of wood. It is known that also wooden rods or bars can be bent and curved, and besides, it is not indispensably requisite to make, for instance, the side parts (a b c e) of one piece, but the sides may be composed of two or more parts suitably connected with each dther. The characteristic feature of the invention consists in substituting for the usual four legs only two legs formed by elastically yielding and substantially parallel to an ing the back, this may also be designed as desired. In the constructional form shown in Fig. 1, the seat proper g and the back proper k are assumed to consist of a fabric, leather or .the like.

It is to be observed that in the preferred form the parts a, b, c and d areformed from a single piece desirably of tubular metal which has the ends thereof joined together as by welding, being first shaped to form an open rectangular frame as clearly apparent from the drawings. Inthis form the corresponding side portions may be bent at the same time thereby facilitating the shaping operation.

The chair illustrated in Fig. 2 is of the same design as that illustrated in Fig. 1, but provided with arm rests i iconnected at the rear by a transverse portion or member '2", and at the front with circularly curved portions resembling the portions 6 b, but having a longer radius of curyature, and being united at their ends with the portions 7).

In connection with the foregoing it is also to be noted that the reinforcing side arms are also formed from a' single U shaped tubular member, the intermediate or cross piece 2" of which braces the back while the lower curved portions of the uprights are joined to the parts :6 near the points of bend from the parts a and effectively brace the parts I) and e and increase the durability of the chair as a whole without seriouslyimpairing the desired resiliency thereof.

I claim:

1. A chair comprising a seat roper, a back, and a frame embodying tubu ar seat-carrying portions, tubular back carrying portions, tu ular sill portions, semi-circularly curved direct tubular connections between each seatcarrying portion and the sill portion on each side of the chair, and partly curved, partly horizontal tubular portions connecting said back carrying ortions and said sill portions with one anot er on each side of the chair, said horizontal parts forming arm rests. and said curved parts being united at their lower ends with said sill portions.

2. A chair including a frame formed from a single piece of material bent into a rectangular configuration, the sides of which near one end constitute foot supportin portions the side portions continuing there rom being curved upwardly to form front supporting portions, seat portions continuin therefrom overlying the foot portions, back portions extending upwardly from the seat portions, and 9.

arms, curved vertically disposed portions,

joined to the curved front portions.

In testimony whereof I aflix my signature.

LUDWIGj MIES.

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