US1017190A - Method of manufacturing chair-seats. - Google Patents

Description

E. P. WAN NER. METHOD OF MANUFACTURING-CHAIR SEATS.

APPLICATION FILED FEB. 4, 1909.

Patented Feb. 13, 1912.

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UNITED sTATEs PATENT oEEIc EDWIN P. WANNER, OF NEW YORK, N. Y.

METHOD OF MANUFACTURING CRATE-SEATS.

Application filed February 4, 1909.

To all whom it may concern Be it known that I, EDWIN P. l/VANNER, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in the Method of Manufacturing Chair-Seats; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to the manufacture of chair seats and it consists in an improved method of manufacturing such seats whereby the expense incident to the production of chairseats in large quantities is very materially reduced and a seat produced which is durable in construction, substantially proof against warping and capable of being rejuvenated upon wear or damage with respect to the seat-proper thereof.

In the accompanying drawing, Figure 1 is a sectional view taken transversely through a piece of wood which has been formed into a ring or other continuous structure; Fig. 2 is a similar view showing the structure of Fig. 1 after it has been sawed in a plane parallel with its top surface, the separated parts appearing slightly spaced; Fig. 3 shows the completed chair seat, likewise in transverse section, and as having a seat-proper of the cane variety; and, Fig. at is a view like Fig. 3 but showing a seat-proper of the so-called slip-seat variety.

In carrying out my invention a continuous structure a is first formed, by bending a suitable length of wood into endless shape and securing the ends thereof together in any manner customary in the manufacture of bent wood furniture.

The piece of wood from which the structure a is formed has one transverse dimension, greater than the other, and when the bending is performed, it is that dimension which is parallel to the axis of bending, the purpose of which will appear later. Having formed the structure a, it is divided horizontally, by sawing, in a plane nearer its top surface 0 than its bot-tom surface cl, preferably a circumferential flange 6, adjoining the top surface of the frame and of Specification of Letters Patent.

Patented Feb. 13, 1912.

Serial No. 476,043.

rounded form, is left when the frame is complete, such flange being formed on the wood piece from which the structure is made before or after bending the same, and itis through the lower portion of this flange where the sawing operation is performed, the object being to conceal the joint which is produced when, as hereinafter stated, the upper member (or its replica) is secured upon the lower member. The upper member e is now provided with a seat proper j, the lateral portions of the caning being passed through the holes 71, which are bored in the member 6 after the members 6 and f are formed. In the member f is formed a continuous groove 72. into which the portions of the caning 7' may extend when the two members 6 and f are assembled, the object of forming the groove in member f instead of member 6 being to avoid. the weakening of member 6 which would result if the groove were formed in that member. Or the member 6 may be provided with a slip seat Z, which may be seated in the rabbet Ir- In order to secure the members 6 and f together, preferably before the structure a is sawed to produce said members, holes m are drilled into the structure a from the under side and far enough to extend past the plane of sawing. When the structure is then sawed, it is only necessary to bring the holes in the two members 6 and f in alinement with each other to insure the members registering perfectly before binding them together by means of the screws 9 inserted into said holes.

The object in forming the piece of wood from which the structure a is produced with one transverse dimension greater than the other and thereupon bending the piece of wood in such manner that its greater transverse dimension is parallel with the axis of bending is the following: For the purpose of imparting the necessary rigidity to the chair of which the structure or forms a part and in order that, in point of proportion, said structure a may harmonize with the other parts of the chair, said structure has a cross-section in which, as is usual, its vertical dimension approximates its horizontal dimension. The members 6 and f which are formed as the result of dividing the structure 0!, therefore each have considerably less vertical dimension than horizontal dimension, which fact has to be taken into account in the initial formation of member a, lest the members warp and become distorted-conditions which may not arise until some time after the chair has been sold and gone into use. The warping and distorting, if likely to occur (depending upon the condition and nature of the wood at the time of bending), would of course manifest themselves to some extent though the structure be not divided; but when it is divided, as described, it results to an increased extent in the relatively thinner members'e and f and can only be counteracted by the application of a considerable number of screws or other securing devices serving to bind them together. By forming the structure a with its vertical dimension greater in the crosssection of the structure than its horizontal dimension, this warping and distorting is far less likely to occurapparently because the fibers of the wood which are remote from the axis of bending are compelled to be more perfectly stretched, while those near said axis are compelled to be more perfectly compressed, when the bending is performed than in the case where the vertical dimension is the less, in which instance before the stretching or compression of the fibers can be fully effectual to overcome their resistance thereto the material tendsto give way laterally in such manner that a cross-section thereof instead of remaining, for instance, a rectangle would be either Q or U. In view of such tendency, as soon as the material is then divided as herein stated, the resulting parts,

each thinner than the whole, yield more or less to such tendency, according to the extent of their thinness, although the original or undivided piece might not actually yield to such tendency.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is The method of manufacturing chair seats which consists in first forming a suitable length of wood having asubstantially rectangular cross-section with one transverse dimension thereof greater than the other, bending the said length of wood, with its greater transverse dimension parallel to the axis of bending, into the form of a continuous structure and securing the ends of said structure together, and finally severing the frame crosswise of the axis of bending and near one plane surface of said structure, whereby to produce a thick continuous member adapted to form a permanent part of a chair and a relatively thin continuous member adapted for the attachment thereto of the seat-proper and to be attached to said thick continuous member or a replica thereof, substantially as described.

In testimony that I claim the foregoing l have hereunto set my hand this first day of February, 1909.

EDWIN P. ANNER.

Vitnesses J 01 m STEWARD, 7M. H. KUNTZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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