Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS458140 A
Publication typeGrant
Publication dateAug 18, 1891
Publication numberUS 458140 A, US 458140A, US-A-458140, US458140 A, US458140A
InventorsLois A. Bangs
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 458140 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(N0 Modl.) L. A. BANGS.


No. 458,140. Patented Aug. 18, 1891.

we NORRIS PETERS co., moYo-Lxmd, wusumaran, n. c.




SPECIFICATION forming part of Letters Patent No. 458,140, dated August 18, 1891.

Application filed November 24, 1890. Serial No. 372,450. (No model.)

T at whom it may concern.-

Be it known that I, LOIS A. BANGS. a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Chairs and I do hereby declare the following to be a full, clear, and exact description of the invent-ion, such as will en able others skilled in the art to which it pertains to make and use the same.

to It is the object of the invention to produce a chair not differing widely in appearance from ordinary forms, but that shallmore perfectly support the shoulders and spinal column when in a comfortable and healthful I5 position. It is shown in the accompanying drawings, in which Figure 1 is a perspective view of the complete chair; Fig. 2, a side elevation of the same; Fig. 3, a horizontal section at the point w 01 :1}, Fig. 1.

In the drawings, A is the seat, and B B are side posts for the chair-back. The latter are perfectly continuous with the rear seat-supporting legs. Above the seat the posts incline 2 5 forward, then bend rearward somewhat sharply in a curve corresponding in position to the small of the back, and thence extend upward and rearward to a point corresponding to the position of the shoulders, where'they 0 again curve slightly forward. They are connected at two or more points by forwardly convex cross-bars O, and these are connected by a series of bars D, nearly identical in curvature with the parts of the posts that lie in 3 5 the same horizontal plane. The whole back and forwardly concave at the upper part and in horizontal sections is at all points forwardly convex. It isth us adapted to support 0 nearly the whole length of the spine and at the same time the'parts upon each side thereof, whether or not the person occupies precisely the middle of the chair, and whatever the position the shoulders are not pressed forward so 5 as to compress the chest or interfere with the perfect action of its muscles.

The material used in construction is preferably wood, and it is essential that the parts he so far rigid that the convex portions remain convex at all times. If the lowercross-- bar be placed at the point B and the barsD be omitted, the chair will still be valuable, though less satisfactory.

hat I claim is v 5 1. A chair-back having side posts connected by forwardly convex cross-bars in position to support, respectively,the shoulders and the lower portion of the back, as set forth.

2. A chair having the side posts of its back conformed approximately to the normal front and rear curvature of the spinal column and connected at points corresponding to the position of the shoulders and the lower portion of the back by forwardly convex cross -bars, which are themselves united by bars similar in curvature to said side posts.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.v


Witnesses: I


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4555139 *Mar 30, 1983Nov 26, 1985Leib Roger KPatient's defined-motion chair
US4784435 *Dec 3, 1986Nov 15, 1988Leib Roger KPatient chair
US4946224 *Mar 21, 1988Aug 7, 1990Leib Roger KCombination wood-metal chair
US5071191 *Apr 16, 1990Dec 10, 1991Leib Roger KCombination wood-metal chair
US7334845 *May 14, 2004Feb 26, 2008Steelcase Development CorporationComfort surface for seating
US20040245841 *May 14, 2004Dec 9, 2004Peterson Gordon J.Comfort surface for seating
Cooperative ClassificationA47C7/46